ARMY TM 9-1375-213 -12-3AIR FORCE TO 11A20-15-1

TECHNICAL MANUAL

OPERATOR’S AND UNIT MAINTENANCE MANUAL

FOR

FIRING DEVICE, DEMOLITION. M122

(NSN 1375-01-021-0606) (EIC: 2NA)

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

HEADQUARTERS, DEPARTMENTS OF THE ARMY AND THE AIR FORCE

JULY 1994

WARNINGS

FAILURE TO OBSERVE WARNINGS CAN RESULT IN INJURY ORDEATH OF PERSONNEL.

DO NOT CHECK OUT DEMOLITION FIRING DEVICES M122 INSAME AREA OR AT SAME TIME THAT OPERATIONS ARE BEINGCONDUCTED WITH OTHER DEMOLITION FIRING DEVICES M122.

DO NOT CONNECT THE FIRING CIRCUIT UNLESS RECEIVER’SARMING SWITCH IS IN “SAFE” POSITION.

DO NOT USE THE TRANSMITTER WITHIN 100 FEET OF ANYELECTRIC BLASTING CAPS. KEEP THE TRANSMITTER’SANTENNA COLLAPSED WITHIN UNIT AND ANTENNA CAPSCREWED INTO TOP OF CARRYING HANDLE UNTIL ACTUALFIRING OF EXPLOSIVE CHARGE.

NEVER OPERATE THE M122 TRANSMITTER WITHIN 100 FEET OFANY BLASTING CAPS OR OTHER ELECTRO-EXPLOSIVEDEVICES. DO NOT OPERATE OR CHECK OUT TRANSMITTERWHEN TRAVELING WITH A BOX OF BLASTING CAPS IN THESAME TRUCK.

DO NOT CONNECT BLASTING CAP CIRCUIT TO A RECEIVERWHICH DOES NOT HAVE CONTINUITY BETWEEN BLASTING CAPBINDING POSTS. IT COULD ACTIVATE CAPS WHEN THECONNECTION IS MADE.

AVOID CONTACT WITH TRANSMITTER ANTENNA WHENPRESSING FIRE BUTTON. A SLIGHT BURN CAN RESULT FROMTOUCHING THE ANTENNA WHEN A SIGNAL IS BEINGTRANSMITTED, IN ADDITION THE TRANSMISSION RANGE WILLBE REDUCED.

KEEP BLASTING CAPS AWAY FROM EXPLOSIVE CHARGES ANDFACE AWAY FROM THE BLASTING CAPS WHEN PERFORMINGOPERATIONAL CHECK OF THE RECEIVER.

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TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 61CONSISTING OF THE FOLLOWING:

Page *ChangeNo. No.

Cover oInside Cover oA and B oi thru iv o1-1 thru 1-12 02-1 thru 2-12 03-1 thru 3-12 04-1 thru 4-2 0A-1 thru A-2 oB-1 thru B-4 oC-1 thru C-6 oD-1 thru D-2 oAuthentication Page o

* Zero indicates an original page,

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TECHNICAL MANUAL ) HEADQUARTERSNo. 9-1375-213-12-3 ) DEPARTMENT OF THE ARMYTECHNICAL ORDER ) AND THE AIR FORCENo. 11A20-15-1 ) Washington, D.C., 5 July 1994

TECHNICAL MANUALOPERATOR’S AND UNIT MAINTENANCE MANUAL

forFIRING DEVICE, DEMOLITION: M122

(NSN 1375-01-021-0606)

REPORTING OF ERRORSYou can help improve this manual. If you find any mistakes or know of a way toimprove the procedures, please let us know. Mail your DA Form 2028(Recommended Changes to Publications and Blank Forms) or DA Form 2028-2,located in the back of this manual, direct to Commander, U.S. Army ArmamentResearch, Development and Engineering Center, ATTN: SMCAR-LSB,Picatinny Arsenal, NJ 07806-5000. A reply will be furnished to you.

CHAPTER 1.

Section I.

Section II.

Section 111.

CHAPTER 2.

INTRODUCTION

General1-1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Forms, records, and reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . .

Precautions, Care, and Handling1-3 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...... . . . . . . . . . . . . . . . . . . . . .1-4 Care and handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......

Description and Data1-6 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 1-7 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-9 Functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10 Packing and packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11 Tabulated data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATING INSTRUCTIONS2-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 2-2 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Operation under usual conditions-preparation for use . . . . . . . . . . . . . . . . . . . . . . . .2-4 Firing procedures . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5 Cause of malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6 Disposition of defective unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7 Application note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8 Operation under unusual conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-11-1

1-21-21-2

1-21-31-31-101-101-10

2-12-12-22-62-102-102-102-10

*This manual supersedes TM 9-1375-213-12-3&P/TO 11A20-15-1, 25 November 1981, including allchanges.

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CHAPTER 3.

Section I.

Section II.

Section III.

CHAPTER 4.

APPENDIX A.

APPENDIX B.

APPENDIX C.

APPENDIX D.

Figure

1-11-21-31-41-51-61.71-82-12-22-32-43-13-23-33-4

ii

MAINTENANCE

Service Upon Receipt of Material3-1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 Unpacking and inspection by operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operator Maintenance3-3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 Cleaning batteries and contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5 When to replace batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6 Battery installation and replacement ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 Disposal of used batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8 Transmitter antenna replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9 Checkout prior to use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10 Carrying case repair c . . . . . . . . . . . . . . . . . . . . . . . . c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .3-11 Operator quarterly checkout/PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Organizational Maintenance3-12 Battery/Battery pack testing, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHIPPING AND STORAGE4-1 Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 Shipping and storage data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . .

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .

PACKING MATERIALS, ACCESSORIES, AND TOOLS..........................

MAINTENANCE ALLOCATION CHART . . . . . . . . . . . . . . . . . .. . . . . . . . . . .

EXPENDABLE AND DURABLE ITEMS LIST.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIST OF ILLUSTRATIONS

Title

3-13-1

3-13-23-23-33-63-63-73-113-11

3-11

4-14-24-2

A-1

B-1

C-1

D-1

Page

Transmitter and receiver of demolition firing device M122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Transmitter of demolition firing device M122.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Receiver of demolition firing device M122 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Receiver of demolition tiring device M122 (rear view).....................................

Carrying case, open with contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Transmitter of demolition firing device M122 (ready for use) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Battery pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Example of target sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Extending tranmitter antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Holding transmitter (three position) in vertical attitude for firing , . . . . . . . . . . . . . . .General layout of detonating cord firing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cleaning transmitter battery pack connector in battery compartment . . . . . . . . . . . . . . . . .Removing tight battery cap using the second receiver as wrench . . . . . . . . . . . . . . . . . . . . . . . . .Cleaning receiver battery contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installing receiver battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-41-41-51-51-61-71-92-52-72-82-113-33-43-53-5

TM 9-1375-213-12-3TO 11A20-15-1

3-5 Improvising replacement antenna........................................................... .. 3-84-1 Operating air valve............................................................................ 4-2B-1 Control, remote, firing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

LIST OF TABLES

Table Title Page

2-1 Number of Blasting Caps that Maybe Fired by One Receiver vs FiringLead Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2-1

2-2 Demolition Explosives and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23-1 Battery Test Parameters with battery at room temperature (between + 60°

and+80 0F) under load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-12

. ! .

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CHAPTER 1INTRODUCTION

Section 1. GENERAL

1-1. SCOPE

This publication, prepared for use by test per-sonnel and interested Army elements, providesoperator and maintenance instructions cover-ing demolition firing device M122. The firingdevice M122 is used to detonate explosives froma remote location. The demolition firing deviceM122 consists of a separate transmitter andreceiver. The transmitter transmits a codedradio signal to activate a specific receiver. Thereceiver, placed in the vicinity of the explosive,initiates the explosive upon receipt of the prop-erly coded radio signal.

1-2. FORMS, RECORDS, ANDREPORTS

a. General. Commanding Officers of unitsreceivining demolition firing devices areresponsible for preparation of records andreports. For reporting purposes, demolition fir-ing devices are identified by seria numbers andstandard nomenclature as described on itsname plate.

c. Malfunction Reports.

(1) Malfunction of firing device M122.A malfunction is a failure of a demolition firingdevice M122 to function in accordance with itsintended purpose. During initial deployment, itis requested that defective components be

returned to the developing agency. Forward theitems to Commander, US Army Armament,Munitions and Chemical Command, ATTN:AMSMC-MAE-T, Rock Island, IL 61299-6000.Remove batteries from the receiver and trans-mitter before packing. The units should be well-cushioned by crumpled newspapers, poly-urethane foam, or whatever materials can beobtained.

(2) Reporting of malfunctions. Forreporting

ipurposes, malfunctions do not

include accidents and fires resulting from negli-gence, malpractice and the like. However, mal-functions do include abnormal or prematurefunctions if they occur in the course of normalhandling, maintenance, storage, transportationand tactical deployment.

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Section II. PRECAUTIONS, CARE, AND HANDLING

1-3. PRECAUTIONS

WARNING

1-4. CARE AND HANDLING

The following care and handling procedureswill be observed to protect the M122 firingdevice .

(1) The device is designed to withstandconditions ordinarily encountered in the field.

The M122 contains no explosives, however,the control unit (i.e., radio transmitter) can initi-ate electro-explosive initiators by means of itsradiated radio frequent energy, Precautionsoutlined in FM 5-250, TM 9-1375-213-12, andthis publication should be observed when in thevicinity of electro-explosive initiators such asblasting caps. Operators should be careful toavoid touching the control device antenna whentransmitting because minor radio frequencyburns MAY occur.

Section III. DESCRIPTION AND DATA

1-6. GENERAL

a. The Demolition firing device M122 (fig. 1-1) is designed to remotely initiate explosives by

means of a coded radio signal radiated by itstransmitter to the receiver located at or nearthe explosives.

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RECEIVER TRANSMITTER

Figure 1-1. Transmitter and receiver of demolition firing device M122.

b. The maximum operating distance fromthe transmitter to receiver will vary with the ter-rain, The nominal operating distance is a mini-mum of 1000 meters (0.6 of a mile). Underadverse terrain conditions such as dense forestor frozen tundra, an operating range of lessthan 0,6 mile (1000 meters) may be experi-enced. In clear areas and with good weatherwhere a line of sight exists between the trans-mitter and receiver, operations are possible atdistances up to 3.2 kilometers (2 miles) overland, 5 kilometers (3 miles) over water, and 10kilometers (6 miles) from aircraft to an open(uncovered) firing site.

1-7. IDENTIFICATION

The transmitter and receiver are coloredolive drab with white marking. Metal identifi-cation plates on the transmitter and receiverbear the following information:

Transmitter ------------------ M122 TransmitterPart No. 9252773Serial No.

Receiver ---------------------- M122 ReceiverPart No. 9279048Serial No.

1-8. DESCRIPTION

a. General. The major components of thetranamitter receiver are shown in figures 1-1 through 1-7. The transmitter is used forencoding and transmitting a radio signal andhas its own antenna collapsed within the carry-ing handle. The receiver with an attachedantenna wire is used for receiving and decodingthe incoming radio signal. This signal triggerselectronic firing of attached blasting caps thatinitiate explosive charges, The firing device isissued in sets consisting of one transmitter and

d10 receivers in a fitte carrying case (fig. 1-5and 1-6). The initial batteries and special bat-tery pack will not be supp lied with the item.Batteries and battery packs must be requisi-tioned through normal channels. Receiverbatteries should be available for over-the-counter issue in most areas. Batteries or bat-tery packs are not shipped installed in thedevices and must be installed before checkouttest or use.

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Figure 1-2. Transmitter of demolition firing device M122.

Figure 1-3. Receiver of demolition firing device M122 (top view)

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Figure 1-4. Receiver of demolition firing device M122 (rear view)

Figure 1-5. Carrying case, closed.

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Figure 1-6. Carrying case, open with contents.

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Figure 1-7. Transmitter of demolition firing device M122 (ready for use).

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b. Transmitter.

(1) The transmitter (fig. 1-2 and 1-7) isa one piece, self-contained unit similar in appear-ance to a walkie-talkie. The fully transistorizedunit which is powered by a battery pack can gen-erate, encode, and transmit a radio signal to acti-vate a receiver. Over a million different codesmay be selected for transmission; therefore,many receivers may be activated from one trans-mitter in a short period of time.

(2) The following operational parts areaccessible from the top of the transmitter (fig.1-2).

(a) One four-position rotary areacode switch used to select the letter of the codeto be transmitted.

(b) Six push-button switches withvisible numbers (0 to 7) to select the digits ofthe code to be transmitted or setting of the unitinto a self-test mode.

(c) A fire signal lamp which indi-cates proper operation when the unit is beingself-tested or used.

(d) A 47-inch telescopic antennawhich can be totally collapsed within the trans-mitter carrying handle and then secured by ascrew-on cap,

(e) A fire button with a spring-loaded protective cover.

NOTE

An identification plate bearing theitem name, part number, and serialnumber is located on the side of theunit.

(f) A special antenna connector(female, MIL-C-39012/62-3002, radio frequency

Iseries SMA) is provided for factory use. t maybe utilized by some users under special circum-stances.

(3) Pushing the fire button (locatedbeneath a spring-loaded cover on the top of the

unit) causes transmission of the selected signal.Power is provided by the special battery packwhen installed in the unit.

c. Receiver. The receiver (fig. 1-3) is asmall box with an integral, cylindrical batterycompartment on top. It contains the electricalcircuitry to fire the attached blasting caps uponreceiving the properly encoded command signalfrom a transmitter. Special circuitry allows thereceiver to be actuated only by receipt of acoded radio signal unique to the particularreceiver. Each and every receiver has its ownindividual code. Power for the operation of thereceiver and for the firing of the blasting caps isa single D cell. The receiver (figs. 1-3 and 1-4)incorporates the following features:

(1) An identification plate located onthe side of the receiver.

(2) The code settings required for thereceiver are stamped into the body adjacent tothe identification plate.

(3) A carrying ring.

(4) A battery compartment with itsscrew-on cap. The screw-on cap incorporates anylon retaining cord.

(5)

(6)

(7)

(8)

(9)

A delay-arming switch.

Antenna binding post.

Two blasting cap binding posts.

A fire signal lamp.

An index mark (provided as visualreference to assure proper tightening of batterycap).

d. Batteries.

(1) The transmitter requires a specialalkaline battery pack (fig. 1-8). A fresh batterypack should have the capacity to provide atleast 1000 transmissions. Shelf life is about 18months. Because it is a low usage item, it willnot be stocked locally. It is advised that a freshbattery pack be requisitioned once a yearwhether the transmitter has had heavy usageor not. If the transmitter will receive heavyusage, order a replacement battery far enoughin advance to allow for delivery from a centralsupply organization in time for use.

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TM 9-1375-213-12-3TO 11A20-15-1

Figure 1-8. Battery pack.

peraturehigh operating

(2) The receiver requires a fresh alka-line D cell for optimum operation. If an alka-line D cell is not available, a fresh standardzinc-carbon flashlight D cell may be substitutedif the receiver will be used at a moderate tem-

(approx +60 to + 85ºF). For extremelytemperatures (see tabulated

data, para 1-11) a m ercury D cell maybe used.Mercury batteries generally have better hightemperature characteristics than the alkalinetypes. Because of their physical differences (seenote para 1-11), they may not work properlywith some receivers. Therefore, whenever amercury battery is used, always check outreceiver (para 3-9) before use. Details on thebatteries and their expected useful “on-duty”life are tabulated in paragraph 1-11.

e. Auxiliary Equipment.

NOTE

All auxiliary equipment necessary forsetting up and operating the M122 is

available in Demolition Equipment Set,Explosive Initiating, Electric and Non-electric, NSN 1375-00-047-3750.

(1) Antenna wire for receiver. A 10-foot (3.3 meters) length of practically any insu-lated wire with half an inch of insulationstripped from one. end for connection to thereceiver will make a good antenna. The solidsingle conductor wire, NSN 6145-00-542-3968,avaiable in the demolition equipment set willbe satisfactory.

(2) Circuit test instruments. Either ofthe two standard blasting circuit test instru-ments ma ybe used with the M122. The M51test set, NSN 4925-00-999-3454, or the BlastingGalvanometers, NSN 6625-00-539-8444, maybeused to check out the receiver itself as well asthe blasting caps and firing circuit. Use of theM40 test set with an M57 firing device (as usedwith the M18A1, Claymore Mine) is not advisedbecause it is rather cumbersome to adapt andhook up to plain wires.

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(3) Blasting caps. In standard electri-cal initiation type operations, only M6 caps(NSN 1375-00-028-5224) should be used ifmore than one cap is required. If a standardcap is being used, it may be of any type that iscompatible with the explosive charge or minebeing initiated. See TM 9-1375-213-12 and FM5-250 for more details.

1-11. TABULATED DATA

Packing Data:

Shipping box (with contents):

Length ----------------------- 25.5 in. (64.8 cm)Width ------------------------ 24.5 in. (62.2 cm)Height ---------------, -------- 11.5 in. (29,2 cm)Weight (as shipped) ------ 75.0 lb (34.0 kg)Cube ------------------------- 4.2 cu ft (0.2 cu m)

Carrying case (w/contents, excludingbatteries):Size:

Length ----------------------- 23,75 in. (60,3 cm)Width ------------------------ 22.75 in. (57,8 cm)Height ----------------------- 8.8 in. (22.4 cm)Weight ----------------------- Approx 30 lb (13.6

kg)cube ------------------------- 2.8 CU ft (0.08 CU

m)

Transmitter:Size (antenna collapsed):

Length ----------------------- 11,00 in, (28 cm)Width ----------------------- 2.63 in. (6 .37 cm)Height ----------------------- 6.25 in. (15,87 cm)

Weight:Without battery pack ---2,25 lb (1 .25 kg)With battery packed--------4.25 lb (2 .13 kg)Operating - -temperature -------------- -25°F to + 125°F

(-32W to +52?C)

NominalEffective Range:

--------------------- 0.6 mile (1 .0 km)

Estimated:Through densefoliage ---------------------- 0.6. mile (km)

Through dense jungle -- 0.5 mile (0.8 km) or

Over land (clear line-of-sight) ------------------- 2.0 miles (3.3 km)

Over water ----------------- 3.0 miles (5.0 km)Over frozen tundra ------ 0,5 mile (0.8 km) or

lessFrom aircraft (clear

line-of-sight) ------------ 6.0 miles (10.0 km)

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TM 9-1375-213 -12-3TO 11A20-15-1

Receiver: BA type.........................Size:

Length ----------------------- 4 in. (10 cm)Width ------------------------ 4 in. (10 cm)

NSN..................................

Height ----------------------- 4 in. (10 cm)

Weight:Without battery ---------- 1.1 lb (0.5 kg)

With battery --------------- 1.4 lb (0.6 kg)Capacity Nominal (see

table 2-1 for details) --- Five M6 ElectricBlasting caps inseries

Operating temperaturew/alkaline battery ------ -25°F to + 125°F

(-32°C to + 52°C)

Transmitter Battery Pack:Type. . . . . . . . . . . . . . . . . . . . . . . AlkalineVoltage ------------------------- 18 V

NSN----------------------- 6135-01-110-3516BA type...........................N/A

Size:Length ---------------------- 5.1 in. (12.9 cm)Width ------------------------ 3,3 in. (8,4 cm)Height ---------------------- 2,3 in. (5.8 cm)Weight ----------------------- 2.0 lb (0.9 kg)

Marking (initial produc-tion only):Battery, Dry---------------- 9296723Contract No.Date18 voltsManufacturer’s name, Plant location

Receiver Battery:---------------------------- Alkaline

Voltage---------------------- 1.5 v

Use ------------------------------

Operating temp range -----

On-duty life Nominal --------

Expected receiver on-dutylife using fresh batteryat various temperatures --

Expected receiver on-dutylife using fresh batteryat various temperatures --

BA 3030/u6135-00-835-7210General and lowtemperature-25°F to + 125°F(-32°C to +52°C)

20 days

-25°F —25 days;+70°F — 50 days;+ 125°F —30 days

+ 50°F — 1 day;—+ 70°F — 20 days;+ 125°F — 30 days

“The BA 1030/u mercury battery does nothave the protruding positive contact of alkalineand zinc carbon batteries. Because of this (a)always carefully check polarity of a mercurybattery when installing, (b) rotate the mercurybattery two full turns within battery compart-ment after inserting it, and (c) always assurethe receiver’s contacts are making proper con-tact by conducting a checkout of any receiverbeing used with a mercury battery.

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THIS PAGE INTENTIONALLY LEFT BLANK

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TM 9-1375-213-12-3TO 11A20-15-1

CHAPTER 2OPERATING INSTRUCTIONS

2-1. GENERAL

a. In field use, the receiver may be used asan expendable or nonexpendable item, When itis necessary or desirable to expend the receiver,it should be placed as close as possible to theexplosive charge (on to of charge, if feasible).

en the receiver is Not to be destroyed, a fir-ing lead of suffcient length should be used.The nominal capacity of the receiver is five M6caps wired in series. The actual number of capsthat may be initiated by a receiver will dependu on the length and type of firing lead used.The lead lengths and allowable number of capsare tabulated in table 2-1 for each t e of wire.The blasting caps must be connected in series.Hookup of the firing lead and blasting capsshould be in accordance with standard electric

priming procedures. Refer to FM 5-250 andM 9-1375-213-12 for proper preparation of the

explosive charges and priming, Since thereceiver is essentially a low capacity blastingmachine, standard electric priming techniquesmay be employed with it.

b. When the receiver is to be used fre-quently in a nonexpendable manner (on a demo-lition range, for example), locate receiver as faraway as possible from explosive charge and pro-tect the unit by digging a six inch deep hole inthe ground. Place receiver in hole, leaving on]

{the antenna protruding above the ground. fthe antenna terminals will be covered withearth, protect them with tape or other water-proof material. The receiver ma be covered

’with sandbags or placed in a small wooden boxor ammunition container. If an ammunition con-tainer is used, drill two 1/4-inch holes on theside of the container, one hole for the antennawire and the other hole for blasting wires. Theminimum distance that the receiver should beplaced from the explosive will de end uponcharge size, soil conditions, debris from explo-sion, charge setup, and fragments. For guid-ance purposes, the minimum safe distance forreceiver placement from a 15 pound charge ofTNT was found to be 15 feet (5.0 meters) insoft soil and buried below ground level.

Table 2-1. Number of Blasting Caps ThatMay be Fired by One Receiver vs Firing

Lead Length

Firing Lead No. of M6 No. 18 AWG**Length* (ft) WD-1 Wire

*Disregard length of M6 cap wires.

“*M4 caps are M6 caps with an integral long fir-in lead. The lead of each M4 cap must be con-sidered as 100 feet of No. 18 AWG firing lead.

c. If receiver is to be left on duty for anextended period before being used to fire thecharge, the length of time a fresh battery willpower the receiver in an on-duty state dependsupon the type of battery and the temperature(see para 1-11). If the battery is not fresh, theon-duty time will be reduced. Criteria on bat-tery freshness are given in paragraph 3-11 andtable 3-1.

2-2. PRECAUTIONS

Operations using demolition tiring deviceM122 involve few precautions other than thoserequired for normal explosive operations thatuse conventional electric priming. However,the misfire procedures are different from thosefor normal electric blasting operations. Careshould be exercised in handling the units of thefiring device. Both units are ruggedized andwater resistant; but the less they are abused,the greater them reliability.

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TM 9-1375-213-12-3TO 11A20-15-1

●

●

OTHER EXPLOSIVE ITEMSCONTAINING ELECTRICALINITIATORS WHETHER THEYARE PACKAGED OR NOTPACKAGED.

AVOID CONTACT WITHANTENNA WHEN PRESSING

BURN CAN RESULT FROM

National Stock No.

5110-00-162-2205

5120-00-239-8251

5120-00-248-9420

4925-00-999-3454

6625-00-539-8444

5970-00-644-3167

1375-00-028-5224(M130)

6145-00-542-3968

6145-00-299-6172

6145-00-226-8806

TOUCHING THE ANTENNAWHEN A SIGNAL IS BEINGTRANSMITTED ; IN ADDITION,THE TRANSMISSION RANGEWILL BE REDUCED.

2-3. OPERATION UNDER USUALCONDITIONS-PREPARATION FOR USE

a. Obtain the items listed below in table 2-2. All are available in Demolition Equipment

Explosive Initiating, Electric andNonelectric: NSN 1375-00-047-3750. Checkout operability of M51 test set and/or galva-nometers in accordance with TM 9-1375-213-12.

Table 2-2. Demolition Explosives and Accessories

Item

KNIFE, POCKET: Special Tools, can opener, punch blade,screwdriver and bottle openener w/clevis, one cuttingblade, lg of blade 3-1/4 in. MIL-K-818 (81349)

PLIERS: Lineman’s w/side cutter, 8 in. nom lg, GGG-P-471TYPE 9 CLASS I STYLE A (81348).

OR

PLIERS: Lineman’s style, 8 in. nom lg, type 9, class 2,style A, GGG-P-00471 (81348).

TEST SET, BLASTING CAP: M51, 9227694 (19203)

OR

GALVANOMETERS, BLASTING: w/case and carrying strap SpecWB-411 type 1

INSULATION TAPE, ELECTRICAL: Adhesive; cotton; coatedru impregnated per spec; 0.75 in. w, 82.5 ft to 85ft lg, 0,015 in, thk, dielectric strength per spec;color coded black.

CAP BLASTING: M6; sp, electric, 393653 (10001).

WIRE, ELECTRICAL: Solid conductor, round tinned copper;polyvinyl chloride, nylon jacket; No. 20 AWG, for useas receiver antenna.

If a firing lead is to be used:

CABLE, POWER, ELECTRICAL: firing vinyl polymer ins. twocndct No, 18 AWG stranded, 500 ft. coil, MIL-C-442.

OR

CABLE, TELEPHONE: 2-conductor wire-500 foot reel, typeWD -1/TT, Spec MIL-C-13294C.

2-2

TM 9-1375-213-12-3TO 11A20-15-1

b. Cut a 10-foot (3.3 meters) length of insu-lated, single conductor wire for a receiverantenna. Strip half an inch of insulation fromone end of the wire. If the wire is enameled,use the dull edge of a knife blade to scrape theenamel off the wire.

NOTE

Any 10-foot (3.3 meters) length of insu-lated wire may be used as an antennafor the receiver. A two conductor (wire)lamp cord may be used, however useonly one wire of this lamp cord for theantenna. Strip half an inch of insula-tion from one of the conductors (wires)for connection to the receiver. Makesure that the other conductor of thelamp cord is not touching the conductorthat is attached to the receiver at ANYPOINT.

c. Install batteries and conduct a checkoutof all transmitters and receivers in accordancewith paragraph 3-9. If the receiver is to be lefton duty for an extended period of time refer toparagraph 3-11 and table 3-1 for expected on-duty times.

WARNING

d. Transport checked-out transmitter(s),receiver(s), and other required items to opera-tional area. Provide M122 components withsecure stowage during vehicle transport sothey will not be bounced about or dropped dur-ing transport.

NOTE

If components are accidentally dropped,damaed or impacted in transit, theyshould checked out again before usein accordance with paragraph c above.

e. If practical, choose a transmitter locationthat provides a clear line of sight to the receiverand within a kilometer of the receiver. Refer toparagraph 1-11 which gives expected maximumoperational ranges for the M122 under differ-ent conditions. These are MAXIMUM opera-tional ranges. It is always desirable to have thetransmitter as close as practical to the receiver.

f. Refer to table 2-1 for the number of capsand firing lead lengths allowable and plan tiedetails of the operation accordingly.

g. Emplace the explosive(s), mine(s), orother device(s) to be actuated by the receiver inaccordance with FM 5-250 or other standardapproved procedures.

h. Prior to use, check each blasting cap forcontinuity using blasting galvanometers or M51test set in accordance with standard proceduresin TM 9-1375-213-12 and FM 5-250. A flash ofthe test set’s lam or a wide deflection of the gal-vanometer’s needle indicates a complete circuit.

i. Wire the blasting caps in a series or paral-lel circuit in accordance with standard proce-dures. Use electrical tap e to insulate eachsplice to prevent accidental shorting or ground-ing.

(See part III)

NOTE

Do not at this step of the procedure putcaps into the explosives.

j. Check the blasting cap circuit with ablasting galvanometers or M51 test set. A flashof the test set’s lam or a wide deflection of thegalwmometer’s needle indicates a complete cir-cuit. Termorarily twist the ends of blasting cap

hleads toget er to short circuit them.

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TM 9-1375-213-12-3TO 11A20-15-1

k. Use the following procedures if a firinglead is being employed:

(1) Lay out firing lead from the blast-ing caps to the receiver site. Strip an inch ofinsulation from each conductor of the firinglead at the receiver end; twist the bared conduc-tors together to short circuit them.

(2) Strip an inch of insulation fromeach conductor of the firing lead at the blastingcap end. Check firing lead continuity from blast-ing site using galvanometers or M51 test set.

(3) After clearing all unnecessary per-sonnel from the area, untwist the shorted blast-ing cap circuit leads and connect the blastingcap circuit leads with the firing leads in accor-dance with standard procedures. Insulate eachsplice with electrical tape. At receiver siteuntwist firing lead conductors and check conti-nuity of full firing circuit using galvanometersor M51 test set. Twist firing leads togetherafter test.

in

NOTE

Code switches should be set to zerountil transmitter is to be functioned.The operator should have the transmit-ter in his possession at all times duringthe following steps:

1. Assure that receiver’s arming switch isSAFE position and the battery cap is

securely tightened down.

m. Check out continuity between receiver’sblasting cap binding posts.

(1) Strip an inch of insulation fromboth ends of two short lengths of wire.

(2) Secure one end of each wire into ablasting cap binding post of the receiver ( sitedown post, insert wire into opened hole, releasepost to secure).

(3) Use a blasting galvanometers orM51 test set to assure continuity between theblasting cap binding posts.

(a) Connect or hold the shortlength wires from receiver to the instrumentposts.

(b) Function test set M51 whilewatching its lamp or function galvanometersand observe needle.

(c) Lighting of the test set lamp ora wide deflection of the galvanometers needleindicates continuity exists and the receiver is(4) below. If continuity exists, proceed to step

(d) If instrument indicates thereis no continuity between blasting cap bindingposts, check connections and repeat test. If theinstrument still indicates NO continuity DONOT USE THE RECEIVER. Tag the badreceiver with a statement of the problem (e.g.,NO CONTINUITY — DO NOT USE) and turnit in when practical along with a malfunctionreport (see para 1-2).

(e) Disconnect wires from testinstrument posts.

(4) Remove the short length wiresfrom the receiver’s binding posts (push downpost, pull out wire, release post).

NOTE

If the antenna wire cannot be sus-pended vertically lay it out on theground in a straight line pointingtowards or away from the expectedtransmitter location. The effective oper-ational range will be significantlyreduced with the receiver’s antenna onthe ground.

n. Place the properly checked-out receiverin the desired location. Secure stripped end of10 feet of antenna wire in antenna binding postand tape antenna wire to a tree or other nearbyobject, Suspend the antenna as vertically as pos-sible. Do not suspend antenna b tying thewire itself around a branch, this will reduce itseffective length and therefore reduce its receiv-ing ability.

o. Write down the code and location of eachreceiver. ALWAYS do this.

NOTE

When multiple receivers are used, it isrecommended that a grid coordinate tar-geting sheet be used (fig. 2-1). Thisexample contains all necessary informa-tion needed during the tar et turn-overto enable the operator to effectively andaccurately denote explosives placed.

2-4

TM 9-1375-213-12-3TO 11A20-15-1

UAR2729

Figure 2-1. Example of Targeting Sheet

2-5

TM 9-1375-213-12-3TO 11A20-15-1

WARNING NOTE

DO NOT CONNECT BLASTINGCAP CIRCUIT TO A RECEIVERWHICH DOES NOT HAVE CONTINUITY BE’TWEEN THEBLASTING CAP BINDING POSTS.IT COULD ACTIVATE THE CAPSWHEN THE CONNECTION ISMADE.

NOTE

Assure that the wire insulation is not inthe binding posts. Such an improperconnection will cause a misfire.

p. Clear the area of unnecessary personnel.Keep blasting caps away from the explosivecharges.

It takes the delay arming timer a mini-mum of four minutes to arm thereceiver (i.e., to put it into a statewherein receipt of the properly encodedsignal will actuate it and fire the con-nected blasting caps). The exact arm-ing time will vary with conditions, etc.,so always allow 8 minutes beforeattempting to fire the device.

2-4. FIRING PROCEDURES

WARNING

M122 IS CAPABLE OF INITIA-TING EXPLOSIVE TRAINSREGARDLESS OF POSITION OFANTENNA. DO NOT DEPRESSFIRING BUTI’ON UNTIL READYTO FIRE.

WARNING

KEEP BLASTING CAPS AWAYFROM EXPLOSIVE CHARGESAND FACE AWAY FROM THEBLASTING CAP WHEN PERFORM-ING OPERATIONAL CHECK OFTHE RECEIVER.

Untwist shorted firing lead conductorsor lasting cap circuit conductors and secureone conductor in each of the receiver’s blastingcap binding posts.

r. Hold receiver still with one hand, lift thearming switch lever, and move it to the ARMposition. After 15 seconds lift and move thearming switch back to the SAFE position.

s. Secure caps to explosives in accordancewith standard procedures.

t. When it is desired to start the receiver’sarming cycle, hold the receiver still with onehand, lift the arming switch lever, and move itto the ARM position. Note the time of day.

u. Clear the area of all friendly personneland proceed to the transmitting location.Whenever possible, the transmitter should belocated so there is a clear line of sight fromtransmitter to receiver. The fewer obstructionsbetween transmitter and receiver, the greaterthe possible range and the less chance of mis-fire. Maximum operating ranges for various con-ditions are given in paragraph 1-11.

NOTE

Before firing, allow 8 minutes to assafter the arming switch is set to ARM.

a. Unless the battle is exhausted or thereceiver’s arming switch is manually set toSAFE, the receiver will fire its connected blast-in caps whenever it receives the programmed,coded signal, If the receiver is to be left onduty for an extended period, refer to paragraph1-11 and table 3-1 for expected receiver on dutytimes under various operating conditions.Refer to paragraph 3-11 and table 3-1 on howto test for battery freshness.

(1) When it is desired to fire the receiv-er’s caps:

(a) Set the receiver’s code in thetransmitter. Set letter using area code switch.Set numbers using the six push buttonswitches,

CAUTION

WHEN USING ONE TRANSMITTERTO ACTIVATE TWO OR MORERECEIVERS IN SUCCESSION,ALLOW APPROXIMATELY 3-4SECONDS DELAY BETWEENFIRINGS.

2-6

TM 9-1375-213-12-3TO 11A20-15-1

(b) Unscrew the transmitterantenna cap and extend the antenna to its full47-inch length (fig. 2-2). To assure full exten-sion of antenna, set transmitter on ground orhold between knees. Extend antenna by screwcap until coil appears. Hold coil with one” handand fully extend u per portion of antennausing other hand. Grasp coil and fully extendlower portion of antenna.

WARNING

AVOID CONTACT WITHANTENNA WHEN PRESSINGFIRE BUTTON. A SLIGHT BURNCAN RESULT FROM TOUCHINGTHE ANTENNA WHEN A SIGNALIS BEING TRANSMITTED INADDITION TO THE TRANSMIS-SION RANGE BEING REDUCED.

(c) Hold the transmitter in a verti.cal attitude (see fig. 2-3 and (2) below), LiftFIRE button cover and push the FIRE button.Hold the FIRE button down for at least five sec-onds.

(2) Operator will obtain greater trans-mitting range when operating the transmitterby:

(a) Holding transmitter againstchest.

(b) In kneeling position, placetransmitter on knee.

(c) Placing transmitter on groundor on top of a large metal surface such as thetop of a vehicle, etc.

AR 101927.A

Figure 2-2. Extending transmitter antenna.

2-7

TM 9-1375-213-12-3TO 11A20-15-1

Figure 2-3. Holding transmitter (three positions) in vertical attitude for firing.

2-8

TM 9-1375-213-12-3TO 11A20-15-1

b. To recover the receiver for reuse, pro-ceed as follows:

(1) Return to the receiver site onlyafter it has been determined that the chargehas fired. In event of misfire, refer to para-graph 2-4c below.

(2) Hold receiver body steady and liftarming switch and move it to the SAFE posi-tion.

(3) Disconnect the firing leads andantenna from receiver.

c. Misfire procedure if charge fails to firewhen the FIRE button is pushed is as follows:

(1) Recheck to make sure at least 8 min-utes have passed since the receiver’s armingswitch was moved to the ARM position.

(2) Recheck the transmitter’s code set-ting. Use a flat tip screwdriver to rotate areacode switch back and forth through all posi-tions five times. Reset area code.

(3) If 8 minutes have definitely passedsince arming the receiver, again lift the FIREbutton cover and press the FIRE button.

(4) If the charge still fails to fire, setthe code to all zeros, (any area code) lift theFIRE button cover, press and hold FIRE buttonfor 5 seconds, and observe lamp. If the FIRESIGNAL lam fails to light, secure anothertransmitter, if possible, an attempt to fire thecharge with it.

(5) If FIRE SIGNAL lamp lights, resettransmitter for proper code settings for the spe-cific receiver being used and move closer toreceiver if such movement can be safely under-taken from both a tactical standpoint as well asconsideration of the safe distance from the explo-sive. In addition to moving closer to receiver,relocate transmitter, if possible, so that its sig-nal will reach the receiver from a different direc-tion,

(6) From the new position, lift theFIRE button cover and push the FIRE buttononce again.

(7) If above procedure still fails toresult in initiation of the explosives, if possible,secure another transmitter. Set the propercode and attempt to fire the charge in the nor-mal manner.

(8) If another transmitter cannot besecured or if it too fails to initiate the charge,proceed as follows:

(a) Reset transmitter to zero attransmitter site.

WARNING

WAIT 1/2 HOUR BEFOREAPPROACHING A MISFIREDCHARGE. WHEN A OPERATORAPPROACHES RECEIVERA F T E R A M I S F I R E , I T I SADVISABLE THAT HE TAKE THETRANSMITTER WITH HIM INORDER TO PREVENT THER E C E I V E R F R O M BEINGINADVERTENTLY ACTIVATED BYSOMEONE ELSE. THETRANSMITTER’S ANTENNASHOULD BE RETRACTED.

NOTE

During waiting timereceiver, if available,3-9d.

(b) After

check out anotherrefer to paragraph

waiting 1/2 hour,approach receiver and separated and cut leadwires from receiver blasting cap binding postsone at a time without disturbing receiver orcaps and connections.

(c) Strip an inch of insulationfrom the cut lead wires and twist the wires toshort them. Remove remaining sections of cutwires from binding posts.

(d) Place caps safely away fromcharges and personnel, Check cap circuit usingM51 test set or galvanometers. Check wires forvisual damage in the process.

(e) Using new receiver repeathook-up sequence starting with paragraph 2-31.

(f) If a new receiver is not avail-able, check out current receiver as follows:

1. Retrieve and hold receiverstead and lift and move arming switch to theSAFE position.

2. Assure that the receiver’sbattery cap is tightened to the index marklocated on the receiver’s battery compartment(fig. 1-3).

3. Assure receiver’s antennais properly connected and is NOT beinggrounded.

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TM 9-1375-213-12-3TO 11A20-15-1

4. Assure firing circuit hasbeen properly connected.

5. If the problem is one ofthose in (2), (3), or (4) above, correct asrequired and repeat arming and firing proce-dure beginning with paragraph 2-3m. If theproblem is not one of those listed in (2), (3), or(4) above, use a standard blasting machine tocomplete the operation. Refer to 2-5 below andperform the required maintenance. Check outALL components involved. Turn in and reportdefective items.

2-5. CAUSE OF MALFUNCTIONS

If during use or checkout a unit appearsdefective, the usual cause is weak or defectivebatteries. Corrosion of the battery contacts is acommon cause of a malfunctioning unit. Thesedefects should be corrected by the operating per-sonnel. Procedures for battery replacement andcleaning of battery contacts are detailed in para-gaph 3-6. If the unit after battery replacementand cleaning of battery contacts is still notrestored to operating condition, the electroniccomponents may be defective. Before this con-clusion may be definitely drawn, the suspectunit should be checked out with another comple-ments unit (i.e., use another previouslychecked-out transmitter or receiver to check a transmitter or receiver. ) Refer to para-graph 1-2 for reporting of malfunctions.

2-6. DISPOSITION OF DEFECTIVEUNITS

If during checkout or use, a unit is found tobe defective and the cause is not weak batteriesor corroded battery contacts the defective com-ponent should be turned in. During initial

return defective component.s tothe developing agency. Forward the item toCommander, US Army Armament, Munitionsand Chemical Command, ATTN: SMCRI-DLP(R), Building 299, Rock Island, IL 61299-5000.Remove battery pack from the receiver andtransmitter before packing, The units shouldbe well-cushioned with crumpled newspapers,polyurethane foam, or whatever cushioningmaterials can be obtained. Return of defective

units to development agency will permit evalu-ation of the units.

2-7. APPLICATION NOTE

For demolition projects requiring a largernumber of caps than a receiver can fire, thereceiver CAN be used with one or two electricblasting caps to initiate a detonating cordprimed system (fig. 2-4). The detonating cordprimed system is set up in the normal manneras described in TM 9-1375-213-12, FM 5-250and other application type FMs.

NOTE

If a misfire is experienced in this typeof application, it is advised to first cutthe detonationg cord to isolate the capfrom the main demolition set up.

2-8. OPERATION UNDERUNUSUAL CONDITIONS

a. Cold. When the temperature is muchbelow ±50°F an alkaline battery MUST be usedin the receiver to get a reasonable on-duty time.If snow is present or anticipated, place a plasticbag or other available nonmetal coveringaround the receiver and tie the open endaround the wires to keep snow or moisturefrom the binding posts where it could cause ashort between wires or ground them. The trans-mitter battery pack is alkaline and will operatethe transmitter right down to the lower operat-ing temperature limit, however, because itscapacity is diminished by the cold, it is advis-able to keep it warm to gain maximum range.Therefore, if possible, in sub-freezing tempera-tures keep the transmitter under your outer-parka until it is time to use it. Operation oftransmitter with operator wearing glovesrequires that a pencil or small object be used todepress the FIRE button. ALWAYS protect thereceiver from snow and rain using a plastic bagor by carrying it under your coat.

2-10

TM 9-1375-213-12-3TO 11A20-15-1

Figure 2-4. General layout of detonating cord firing system.

NOTE

Extra force is necessary to push thetransmitter’s fire button at extremelycold temperatures. If the rubber bootover the FIRE button has been cut,moisture can penetrate into the switchmechanism below and if it freezes,extremely high force may be necessaryto push the FIRE button.

b. Moisture. As mentioned above, protectboth receiver transmitter from moisture.Both components are moisture resistant andthe internal parts are protected, but the exter-nal push buttons, switches, and binding postsare vulnerable so special care should be takento protect them, Neither component will operate when submerged in water. If they do dropinto water quickly retrieve them and dry themoff immediately.

c. Heat and Sun.

(1) Batteries, When the daytime tem-erature goes above +9°F, use of the mercurybattery in the receiver will generally give a

longer on-duty time. Mercury batteries gener-ally have better high temperature characteris-tics than the alkaline types. Because of theirphysical differences (see para 1-11), they maynot work properly with some receivers. Whenusing a mercury battery ALWAYS check outthe receiver (para 3-9) before the mission (seeNote, para 1-11). Though alkaline batteriesoperate well at elevated temperatures, they occa-sionally leak. The leaked material can quicklycorrode the contacts which will break the electri-cal connection between battery and receiverand turn off the ower (open circuit). Whenthis happens, the battery may still be good butit can’t get its power to its receiver through thecorroded contacts. See the maintenance chap-ter (para 3-4) for corrective action.

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TM 9-1375-213-12-3TO 11A20-15-1

(2) Sun. The upper operating tempera-ture limit—of + 125°F applies to theTEMPERATURE OF THE COMPONENT, notthe temperature of the air around it. For exam-ple, with the thermometer reading + 85°F inthe shade (the air temperature), an item sittingin the direct sun could easily exceed the + 125°Flimit. The M122 components must therefore beprotected from the direct sun. When doing this,always use a nonmetal covering and allow venti-lation as an unventilated box placed over areceiver in the sun will allow the device to getalmost as hot as if it were in the direct sun. Afew air holes in the sides of the same box couldmake a 20 or 30 degree difference. The same

principle applies to storage facilities.temperatures over + 160°F have been meas-

ured in unventilated metal sheds and box carsduring hot summer days.

(3) Storage in the field. Do not storethe M122 components with the batteriesinstalled even for a day when the temperatureis over 80°F during the day. If a refrigerator isavailable, store the batteries in it during hotweather (or all the time, if possible). Cold stor-age greatly extends the shelf life of batteriesand high temperature storage shortens it (espe-cially if the battery leaks). See shipping andstorage, chapter 4, or more details.

d. Blowing Dust and Sand. Blowing dustand sand can cause damage to the external mov-ing arts of the M122 components. Theswitches, push buttons, transmitter antenna,and binding posts should be given protectionduring transport and use in such environments.After use under these conditions, clean theitems thoroughly (see chapter 3 for mainte-nance procedures).

e. From Helicopter.

(1) When o crating the transmitterfrom a helicopter, follow the normal procedurefor checkout and code selection. To fire thetransmitter, place it on the floor of the helicop-ter in a vertical position and fully extend theantenna. With the door opened, the operatorshould face the receiver site so he has a clearline of sight. Hold the transmitter and depressthe fire button. The transmitter’s antennamust not touch any part of the helicopter dur-ing transmission.

NOTE

If transmitter’s antenna touches anypart of the helicopter during transmis-sion, the transmitter’s range will bedrastically reduced.

(2) The operating range is decreasedbad weather conditions and instructions suchas hilly terrain in the signal path. It isincreased by having a clear line of sig ht path.Therefore, the operator should place thereceiver in a clear area, if possible, and choose asuitable location and altitude for the helicopterwhich will provide a clear line of sight fromtransmitter to receiver.

(3) The M122 is primarily designed tofunction from land-based stations. However,the capability for helicopter usage (based on lim-ited tests) was successfully demonstrated in thetropics. It has limited application in Arctic use.No data are available for desert application. Itis recommended that the M122 be set up for atrial operation to simulate actual operating con-ditions prior to the actual mission.

f. Dual Priming Method.

(1) An “in-effect” dual priming ofcharges can be done with the M 122 receiver bywiring two M6 blasting caps in parallel insteadof the usual series connection.

NOTE

Use of the parallel “dual-priming is notadvised when the ambient temperatureis closer than 10°F to either the high orthe low operating temperature limit.

(2) The dual priming method may beused providing the connection is limited to twoblasting caps wired in parallel, extension wiresthat do not exceed 100 feet each, and two No.18 conductor cables. The blasting caps are tobe used strictly for dual priming of one charge.

(3) Refer to FM 5-250 and TM 9-1375-213-12 for proper preparation of explosivecharges and priming.

2-12

TM 9-1375-213-12-3TO 11A20-15-1

CHAPTER 3MAINTENANCE

Section I. SERVICE UPON RECEIPT OF MATERIEL

3-1. PRECAUTIONS

The components of the M122 are sophisti-cated and expensive electronic devices. Theyshould be handled, transported, and storedwith care. Drop ping or severely impacting acomponent or a battery can disable it. Neverleave batteries in a device being stored for morethan a few days.

3-2. UNPACKING AND INSPECTIONBY OPERATOR

a. When unpacking the items, cut (do notbreak) the binding straps on the shipping

Make no attempt to break or wrenchapart the straps because of the danger of crush-ing the box and damaging the equipment inside.

b. Using a flat tipped screwdriver or screw-driver blade of demolition kit knife, remove thescrews securing the lid of the wooden shippingbox and remove lid. Remove inner packing.

materials (as necessary) and lift out the carry-ing case, If reshipment of the entire M122 isanticipated, retain the wooden box and packingmaterials. Dispose of steel strapping and (if nec-essary) the wooden box in accordance with localregulations.

c. Turn the air valve on the carrying casecounterclockwise two turns to open it. If thereis a hissing sound keep valve o en until itstops. Turn air valve clockwise to close it.

d. Open the two bottom case latches (onedge opposite handle) by rotating latch handlesupward and then twisting the handles counter-clockwise. Swing latches away from theircatches to disengage them, Place carrying caseon edge, HANDLE FACING UP, and on theground. While holding the carrying case steady,open the other four latches. Swing the latchesaway from their catches to disengage themthen disassemble the halves of the case and laythem out flat upon the ground.

Section II. OPERATOR MAINTENANCE

3-3. CLEANING b. The carrying case may be cleaned withdetergent and water if necessary. Remove all

a. The preferred method of cleaning the contents before such cleaning and allow thecomponents and the carrying case is by means case to thoroughly dry before putting themof a clean, dry rag. back.

c. If it is necessary to use more than just a

NOTErag to clean a transmitter or receiver’s exteriorsurface, use a clean rag dampened with alcoholor water. Do not use any other solvent and

To clean code number windows on the NEVER immerse the components. Wipe thetransmitter, use a cotton swab, or cover component(s) dry afterwards.the eraser end of a pencil with a cleancloth. Be careful not to place too muchpressure on the windows when cleaningthem. They can be broken.

3-1

TM 9-1375-213-12-3TO 11A20-15-1

3-4. CLEANING BATTERIES ANDCONTACTS

a. Before installing a receiver battery, wipeboth of its contacts with a clean cloth. Ifa mer-curybattery is being used rub both contactswith clean pencil eraser and then again wipewith a clean rag. This will remove any film exu-date that may have developed in storage.

NOTE

● A n yANY

alkaline battery found withLIQUID or a HEAVY crusty or

crystal exudate should not be used.Any alkaline attery showing ANYEXUDATE should not be used athigh (above +80°F) temperatures.At moderate or low temperatures an’alkaline battery with a small amountof nonliquid exudate ma be cleanedand used for up to half of its nor-mally expected on-duty life. Elec-tronics/supplies issue units whichissue batteries are normallyequipped with a battery test instru-ment and can check batteries when-ever there is a question of theirusability (see para 3-10).

CAUTION

DO NOT USE ELECTRICAL CON-TACT CLEANER ON THE BATTERYCONTACTS OF M122 COMPO-NENTS. THESE CHEMICALS CAN

COMPONENTS.

b. Battery contacts on both M122 compo-nents and the receiver batteries should beinspected and, if necessary wiped with a cleandry rag or a cotton tipped swab (Q-tip or equiva-lent) when a battery is removed. Wipe the usedreceiver battery to determine if it leaked andtherefore extra attention should be given to thereceiver’s battery contacts. If more than a dryrag is required to clean the battery’s contacts,use an alcohol dampened rag or swab.

c. To clean the transmitter’s battery packconnector, reach all the way into the batterycompartment with a rag (fig. 3-1). The connec-tor is at the top center oft e battery compart-ment.

d. To clean a transmitter battery pack’s con-nector, use a toothpick or similar small probe toscrape the inside of the metal tube within eachhole of the battery’s connector.

e, To clean a receiver’s internal battery con-tact, if necessary use a cleaning rag wrappedaround a small twig.

3-5. WHEN TO REPLACE BATTERIES

a. Receiver. Expected on-duty service lifefor the two types of batteries usable in thereceiver are given in the tabulated data of para-graph 1-11. The service life applies to fresh bat-teries. In continuous functioning se (such ason a demolition range), each using unit will geta different service life depending upon numberof caps fired, onduty times, battery age, andthe temperatures to which the batteries are sub-jetted. If batteries ae being kept on hand foran extended period, assure they do not exceedtheir she life. Nominal shelf life for thereceiver battery types in unrefrigerated moder-ate temperature storage is as follows:

3-2

TM 9-1375-213-12-3TO 11A20-15-1

Figure 3-1. Cleaning transmitter battery pack connector in battery compartment.

(1) Alkaline---------------36 months.

(2) Mercury --------------24 months.

NOTE

Sealed, refrigerated storage shouldlextend the she f life of alkaline and zinc-

carbon batteries (see shipping and stor-age chapter 4).

b. Transmitter. Because the transmitterbattery is not a commonly stocked item, itshould be requisitioned well in advance.Delivery may be slow in OCONUS areas.Where a slow delivery is expected, requisitiontransmitter battery packs on a time or antici-pated usage rate basis. Average useful life at-25°F or + 125°F (temperature extremes) is1000 transmissions. At more moderate tempera-tures the average useful life is 1500 transmis-sions. For low usage transmitters where the

temperature is often above + 80°F , batteriesshould be requisitioned, on a yearly basis. For alow usage transmitter in areas of more moder-ate temperature or where the battery is givenrefrigerated storage when not in use, a newpack should be requisitioned every 18 to 24months. There is no purpose in keeping aspare battery pack unless the transmitter isbeing heavily used since the spare will deterio-rate from long storage in the same time as theone in use. Wait until the shelf life is nearlyover on such packs before requisitioning replace-ments. Allow adequate time for delivery.

3-6. BATTERY INSTALLATION ANDREPLACEMENT

a. Receiver.

(1) Assure that arming switch is inSAFE position.

(2) While holding receiver steady, turn battery cap counterclockwise until it dis-engages. Place cap out of the way.

3-3

TM 9-1375-213-12-3TO 11A20-15-1

NOTE

If cap cannot be removed by hand,insert the protruding flange of a secondreceiver’s battery compartment intothe slot of the tight battery cap and usethe second receiver as a wrench toloosen the cap (fig. 3-2).

(3) Turn receiver to allow old batteryto drop out if one is present.

(4) Clean the battery’s contacts with aclean rag (fig. 3-3). If the battery’s contacts arevery dirty corroded, or covered with a film,refer to paragraphs 3-4 and 3-5 for replacementcriteria and cleaning instructions.

(5) Clean the battery contacts insidethe receiver battery compartment with a clean,dry rag.

(6) If a new battery is being installed,wipe its contacts with a clean rag.

(7) Check polarity markings on batteryand insert positive (+) end first into batterycompartment (fig. 3-4).

(8) Thread battery cap onto batterycompartment and screw it on until a resistanceis felt. Turn the battery cap clockwise approxi-mately one more turn to the white index marklocated on top of the battery compartment (fig.3-4) to assure contact.

uAR 102255

Figure 3-2. Removing tight battery cap using the second receiver as wrench.

3-4

TM 9-1375-213-12-3TO 11A20-15-1

Figure 3-3. Cleaning receiver battery contacts.

Figure 3-4. Installing receiver battery

3-5

TM 9-1375-213-12-3TO 11A20-15-1

NOTE

The receiver will not operate when thebattery is put in the wrong way orwhen the battery cap is not tightenedto the index mark.

b. Transmitter.

(1) Secure antenna, if necessary

(2) Invert transmitter and use flat-tipscrewdriver to loosen the two captive screwsholding end cap on transmitter. Lift offend capand set aside.

(3) Hold the transmitter steady andmanually PULL the battery pack OUT in orderto disengage it from the transmitter batterypack contacts, Turn transmitter over and allowold battery pack to FALL out into your hand.

(4) Wipe off battery contact pins insidethe battery compartment with a clean rag or cot-ton-tippedswab. (Refer to paragraph 3-4c ifmore extensive cleaning is necessary).

(5) Slide new battery pack into the bat-tery compartment, connector end first, Whenresistance is felt, give the battery pack a littleextra push to engage the connector.

(6) Place end cap on transmitter andsecure it with the two captive screws using aflat-tip screwdriver. Do not overtighten screwsas this could strip the threads.

(7) After replacing transmitter batterypack, use screwdriver to rotate area code switchback and forth through all positions five times.

NOTE

The switch should be exercised occasion-ally to clean its internal contacts.Battery replacement time is a conven-ient time to do this.

3-7. DISPOSAL OF USED BATTERIES

WARNING

● BURNING AN ALKALINE ORMERCURY BATTERY CAN

RESULT IN EXPLOSION OFTHE BA’ITERY.

SHORTING OR ATTEMPTEDRECHARGING AN ALKALINEOR MERCURY BATTERY CANRESULT IN EXPLOSION OFTHE BATTERY.

Give consideration to the above WARNINGSwhen disposing of both transmitter andreceiver batteries. Assure they are NOTburned when personnel are located in close prox-imity; when these batteries explode, metalpieces and hot caustic chemicals are thrown sev-eral feet.

3-8. TRANSMITTER ANTENNAREPLACEMENT

a. Built-in Antenna.

(1) If it is secured, loosen antenna capand pull out antenna enough to gain access toone of the lowest two sections. Use pliers, if nec-essary

(2) Using flat tip screwdriver, loosencaptive screw at base of carrying handle/an-tenna housing.

(3) Pull out old antenna. Repair it ifpossible.

NOTE

If the antenna has a simple bend, tryhand straightening it and then roll-ing the damaged section betweentwo flat boards (e.g., 2 x 4’s).

See training Circular TC 11-5 foradditional information on repair ofantennas. See b below for an impro-vised replacement.

(4) Grasp the bottom section of theantenna firmly Extend the bottom two sec-tions of the repaired or replacement antenna to

provide a snug fit between the two sections.slowly insert the bottom section into the top of

transmitter’s carrying handle.

(5) When the antenna seats, twist itslowly until it engages the slot in the bottom ofthe handle.

3-6

TM 9-1375-213-12-3TO 11A20-15-1

CAUTION

FINGER TIGHTEN THE SCREW, DONOT USE A SCREWDRIVER (OVER-TIGHTENING COULD DAMAGETHE ANTENNA).

(6) While holding the antenna in posi-tion, hand turn the captive screw clockwiseuntil it engages and secures the antenna.

b. Improvising a Replacement Antenna. Ifthe transmitter’s antenna becomes badly dam-aged and a replacement is not available, takethe following action:

(1) If the damage is above the anten-na’s coil and there is at least a foot of antennaleft (even if it’s bent or crushed), the transmit-ter may still be used but its range will be

Without the full length of antennaabove the coil, the range should still be at leasthalf the normally expected range of a completeantenna.

(2) If the coil is damaged, loosened, orremoved from the antenna or if there is lessthan a foot of antenna left above the coil, a sub-stitute antenna must be rigged:

(a) Obtain a 10 foot length of insu-lated wire (similar to the receiver’s antenna,para 2-3b). If the proper radio frequency (RF)connector (NSN 5935-00-166-6281 or 5935-00-470-2813) is available, solder the conductor tothe center contact of the RF connector.Remove the protective cap from the auxiliary

).antenna connector (fig. 1-2 . Secure the RF con-nector to the auxiliary antenna connector. Apush-twist motion is required to do so.Disconnect the RF connector after assuring it

works properly. If this is done, skip step (b)below and to step (c) If the RF connector isnot available and if possible, obtain an alligatorclip or a similar electrical clamp suitable forgrasping the antenna below the coil.

(b) Strip half an inch of insulationfrom one end of the wire and secure the clip orclamp to the wire. If no clip or clamp is avail-able, strip about four inches of insulation fromone end of the wire.

(c) At the desired transmitter loca-tion, secure the wire in a vertical attitude,stripped end down. Take or tie the antenna in

antenna and reduce the operational range.

NOTE

The transmitter antenna wire MUSTbe set up vertically. Laying it out onthe ground(as can be done with thereceiver will drasticallyreduce the unit’s range.

(d) If the RF connector is to beused, use a flat tip screwdriver or screwdriverblade of demolition kit knife to loosen captivescrew at base of carrying handle/antenna hous-ing. Pull out the remains of the originalantenna. Do not discard the antenna if there isany hope of repairing it.

(e) Connect the antenna wire tothe transmitter as follows:

1. By use of the RF connector(fig. 3-5 a).

2. Secure the antenna’s clipor clamp to the remains of the antennaBELOW the coil (fig. 3-5 b.)

3. Tie the stripped end of theantenna wire tightly around the remains of theantenna BELOW the coil. Tape or tie with astring to assure a good contact (fig. 3-5 c.)

Methods 2 and 3 above will reduce theeffective range or the transmitter.

3-9. CHECKOUT PRIOR TO USE

a. General. Checkout proceduresbe undertaken at the following time:

should

(1) As soon after issue as practicable.

(2) Prior to any mission when theM122 components have been in storage or other-wise inactive for more than a few days.

(3) After dropping or impacting theunits.

(4) After cleaning a battery compart-ment that has battery leakage or corrosion on

position with string or-similar item, not wire. its battery contacts or when a mercury batteryDo not tie the antenna wire itself around any- is being used in the receiver.

thing since this will effectively shorten the(5) Prior to ALL missions where time

and circumstances permit conducting the test.This will give added assurance of mission suc-cess.

3-7

TM 9-1375-213-12-3TO 11A20-15-1

Figure 3-5. Improvising a replacement antenna.

3-8

b.

●

●

c.

Procedures.

DO NOT UNDERTAKE THISPROCEDURE IN THE SAMEAREA OR AT THE SAME TIMETHAT OPERATIONS ARE BEINGCONDUCTED IN WHICH OTHERM122 FIRING DEVICES AREBEING USED.

KEEP THE TRANSMITTER ATLEAST 100 FEET FROM ANYELECTRIC BLASTING CAPS (OROTHER ELECTRO-EXPLOSIVEDEVICES) DURING CHECKOUTOR USE,

Transmitter. Perform self-test as fol-lows:

NOTE

For transmitter self-test, the area codeswitch may be in any position.

(1) Set code to 000000 by depressingthe six push button switches,

(2) Unscrew antenna cap,

(3) Extend the antenna (fig. 2-1).

WARNING

AVOID CONTACT WITHANTENNA WHEN PRESSING

TM 9-1375-213-12.3TO 11A20-15-1

FIRE BUTTON. A SLIGHT BURNCAN RESULT FROM TOUCHINGTHE ANTENNA WHEN A SIGNALIS BEING TRANSMITTED.ADDITION, THE TRANSMISSIONRANGE WILL BE REDUCED.

(4) Lift FIRE button cover and depressFIRE button for 5 seconds while observingFIRE SIGNAL lamp.

(a) Lighting of FIRE SIGNALlamp indicates transmitter is in working orderand may therefore, be used to test operabilityof receiver.

(b) If FIRE SIGNAL lamp doesnot light, the most probable cause is a weak bat-tery pack or corroded battery contacts. See para-graphs 3-4, 3-6, and 3-10 for corrective mainte-nance. After correcting deficiencies, againperform self-test as above.

(5) Retract and secure antenna.

NOTE

If a transmitter appears defective andactions described in (4) above do notrestore unit to serviceable condition,the problem may be only the FIRESIGNAL lamp. If time and circum-stances permit, try to use the appar-ently defective transmitter to actuate areceiver that has been successfullychecked out with another transmitter,If it actuates the receiver, it is good andmay be used, The lamp is not critical tothe OPERATION of the transmitter. Itis only supposed to light when power isfed to the antenna. The lamp is notreplaceable; a good transmitter withonly a defective lamp maybe used.

3-9

TM 9-1375-213-12-3TO 11A20-15-1

d. Receiver. Assure. that receiver’s armingswitch is m SAFE position and the batterycapis securely tightened down. Test receiver as fol-lows:

(1) Obtain a 10-foot length of insulatedwire. Strip an inch of insulation from one end.Insert and secure the stripped end into receiv-er’s antenna binding post.

(2) Place receiver on ground or table”and extend antenna vertically, securing it inthat attitude (e.g. tape the top to a tree branch).

(3) The operation of the receiver maybe checked by either of the following methods:

(b) Connecting a blasting cap tothe blasting cap binding posts. Set the capitself safely away from receiver (for example,under a sandbag) and personnel. The cap willfunction if the device is working properly . Thereceiver’s FIRE SIGNAL lamp may NOT workif a cap is connected to the receiver, Use the pro-cedures in paragraph 2-3 to set up the cap priorto functioning.

(c) Use of a flash bulb or low volt-age light bulb (such as a #313, 28 volt panelbulb) across blasting cap binding posts as in (b)above is an acceptable alternate method ofcheckout and a safer practice since no explo-sives are involved.

NOTE

The flash bulb (or single blasting cap)just checks the basic operation of thereceiver, not its capacity. The capacityof the receiver can only be checked byactually firing the rated number of capeor setting up and using an electricaltest rig (which cannot be done at userlevel). As a quick check, the flash bulb(or single cap) is quite acceptable. Ifthere is any doubt about the receiver’scapacity, a full load of caps should beused for a complete test.

(4) Use a transmitter that has been self-tested and determined to be in workinq order.Set area code and numbers on transmitter tothe letter and number settings indicated on thereceiver to be tested (fig. 1-4). Settings arestamped into receiver body adjacent to identifica-tion plate.

(5) Hold receiver steady lift and movearming switch to ARM position.

WARNING

(6) After waiting 8 minutes for deviceto arm, unscrew antenna cap and fully extendthe antenna (fig, 2-1). With the transmitter atleast 6 feet away from the receiver, lift theFIRE button protective cover and depress theFIRE button for at least 5 seconds. Observethe FIRE SIGNAL lamp on the receiver (orblasting cap from a safe distance).

(7) Lighting of the receiver’s FIRESIGNAL lamp (or firing of the cap) indicatesreceiver is in working order.

NOTE

After receiver is functioned (with orwithout a cap), it requires 2 to 4 min-utes to recharge before it can be func-tioned again. Always allow the full 4minutes in cold temperatures.

(8) If FIRE SIGNAL lamp does notlight or the cap does not function, it is probablythe result of a weak battery, loose battery cap,or corroded battery contacts. Set armingswitch to SAFE and disconnect wires. If used,short cap wires by twisting wires together. Seeparagraphs 2-6, 3-4, and 3-10 for required cor-rective maintenance. After maintenance orreplacing the battery, go to step (1) above.

(9) If a receiver is found defective andthe maintenance does not restore the unit toserviceable condition, see paragraph 2-6 for dis-position.

(10) If receiver checked out properly setarming switch to SAFE and disconnect wire(s).Recover antenna wire for use with the samereceiver or other receivers.

3-10

TM 9-1375-213-12-3T0 11A20-15-1

3-10. CARRYING CASE REPAIR

Local, expedient repair of the carrying caseby operating personnel is authorized,Expedient repair of a cut or gash may be doneby use of a piece of olive drab cloth backed tape.More extensive or permanent repair may beundertaken at the discretion of t e officer incharge.

3-11. OPERATOR QUARTERLYCHECKOUT/PMCS

All items not in regular service should bechecked out every quarter by having a good bat-

tery pack inserted in the transmitter and onereceiver per paragraphs 3-4 and 3-6. Then per-form an operational check per paragraph 3-9. Ifunits check out properly remove batteries thenpack units and batteries for storage. If eitherunit fails to function properly the most prob-able cause is old batteries, corroded contacts onbatteries, or in the unit that did not check out.Have battery checked by OrganizationalMaintenance per section III. Repeat cleaningand installation steps per paragraph 3-6,Repeat operational checks per paragraph 3-9.If this does not correct the situation, the offend-ing unit should be disposed of in accordancewith local regulations.

Section III. ORGANIZATIONAL MAINTENANCE

NOTE

If necessary, general maintenance is tobe done in accordance with the basicDemolition Materials Operator’sManual, TM 9-1375-213-12. the sameapplies to any other authorized opera-tions not detailed in this supplementalmanual.

3.12. BATTERY/BATTERY PACK

a. General. The only organizational mainte-nance Required for the 122 is testing the bat-teries at time of issue. It is intended that thisbe done by issuing supply group. Batteries inservice may also be tested upon request of userpersonnel.

b. Transmitter Pack. Test the pack volts e°Cat room temperature (+ 60° F to + 80°F +15 )

under load using Test Jack #10 (approximately30 ohms) of TS 183( )/U. A fresh pack will meas-ure 17.0 volts or more under load and isexpected to have an estimated operating life of1000 transmitter firings over the temperaturerange -25°F (-32°C) to + 125°F (+52°C). A packmeasuring 16.5 volts under load is expected tohave an operating life that is one half that of afresh pack under certain circumstances. Theabsolute minimum pack voltage under load forshort term useage e is 15.0 volts. In this case theoperator should obtain a replacement pack assoon as possible.

NOTE

The transmitter may not function prop-erly when used with a pack having avoltage measuring less than 15.0 voltsunder load. The lower the battery’s volt-age, the lower the power that can be pro-vided the transmitter. For correctvoltage reading, voltage must bechecked under load.

c. Receiver Batteries, Test receiver batter-ies at room temperature (+ 60°F to + 80°F.+ 15°C to + 27°C) under load using Test Jack#3 (approximately 6 ohms) of TS 183( )/U.Table 3-1 gives test parameters for the batter-ies including expected on-duty life of the bat-tery

NOTE

. On-duty life is affected primarily bybattery type, battery voltage underload, battery condition, temperature,and the number of blasting capsfired. Therefore, under certain cir-cumstances the actual on-duty lifecould deviate significantly from theexpected values given in paragraph 1-

. A fresh alkaline battery (BA 3030)should measure 1.48 volts underload and provide the maximum on-duty life, (see para 1-11). Thereceiver will not function properlywhen used with a battery having avoltage measuring less than 1.2V

3-11

TM 9-1375-213-12-3TO 11A20-15-1

Table 3-1. Battery Test Parameters with battery at room temperature(between +60° and +80°F) under load.

1.

2.

3.

Expected on-duty life of a fresh battery is given in paragraph 1-11.

Expected on-duty life is 72 hrs at the lower battery operating temperature extreme given inparagraph 1-11.

Expected on-duty life at moderate temperature (+ 75ºF + 24°F) is about 50% of fresh battery onduty life, see note 1 above.

Expected on-duty life is 8 hrs at the lower battery operating temperature extreme given inparagraph 1-11.

3-12

TM 9-1375-213-12-3TO 11A20-15-1

CHAPTER 4SHIPPING AND STORAGE

4-1. SHIPMENTa. General. The electronic components of

the M122 are both sophisticated and expensive.They are ruggedized but should still beaccorded the maximum possible protection dur-ing shipment.

b. Procedure.

(1) When ship ping the system, use thecontoured and paddedcarrying case provided.

NOTE

Except for local transportation to anoperational site, assure batteries areremoved from both transmitter andreceiver prior to shipment. For shorttrips, the batteries may be put in thecontoured recesses provided in the carry-ing case. For long distance shipment,ack them in plastic bags in separateboxes. The plastic bag will restrict the

flow of any leakage that ma occur.Use crumpled newspapers or others suit-able materials to ad the batteries andkeep them immobiolized to prevent move-ment during shipment.

(2) For long distance or rough terrainshipment, overpack case in wooden box as usedin initial shipping.

(3) When air shipping the case, assurethe air valve is open prior to shipment by turn-ing it counterclockwise (fig. 4-1). Close it (turnit clockwise) upon completion of the air ship-ment. This applies to local helicopter shipmentas well as longer trips.

(4) When shipping a transmitter orreceiver separately, remove battery and packthe item(s) well using crumpled newspapers orother suitable cushioning material in a sturdybox. Use the packing material to keep items sep-arated. If possible, use a wooden or metal box(ammunition can or box) for maximum protec-tion.

Figure 4-1. Operating air valve.

4-1

TM 9-1375-213-12-3TO 11A20-15-1

4-2. STORAGE

a. General. The components of the M122are expensive electronic devices and aredesigned to initiate explosives remotely, Thismakes secure storage necessary.

b. Components.

(1) . NEVER store either transmitter orreceiver with battery installed for more than afew days. This is especially important in hotweather when batteries are prone to leakage.

(2) Provide the best cool, dry storageavailable. Whenever possible, store M122 com-ponents in the fitted carrying case. Forextended storage place one or two fresh desic-cant (silica gel) bags in the carrying case, if avail-able. Always assure the case’s air valve isclosed.

(3) Use a plastic bag to wrap individualcomponents to be stored for an extendedperiod. If available, pack a fresh desiccant bagwith each component.

c. Batteries. If available, use a refrigeratorfor long-term storage of batteries. This will

greatly extend the shelf life of the batteries andthey will have more power available when putinto service. Wrap the batteries in plastic andseal with tape prior to refrigeration storage.Take the batteries from the refrigerator at leasttwo hours before use to allow them to adjust tothe warmer room temperatures.

4-3. SHIPPING AND STORAGE DATA

Carrying case with one transmitter, 10 receiv-ers and all necessary batteries,

Weight -------------------------- 35 lb (16.6 kg)

Cube ---------------------------- 2.75 cu ft (0.08 cum)

DOT shipping class, etc., not applicable, itemcontains no explosives.

NOTE

Data above are for the carrying casewithout overpack. Data for overpackedbox (as issued) are given in tabulateddata, paragraph 1-11.

4-2

TM 9-1375-213-12-3TO 11A20-15-1

APPENDIX AREFERENCES

A-l. PUBLICATIONS INDEX

The following publication index should be consulted frequently for the latest changes or revisions ofreferences given in this appendix and for new publications relating to the material covered in this man-ual:

Consolidated Index of Army Publications and Blank Forms . . . . . . . .. . . . . . . . . . . . . . DA Pam 25-30

A-2. TECHNICAL MANUALS

Land Mines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-1345-203-12 &PDemolition Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-1375-213-12Demolition Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-1375-213-34Unconventional Warfare Devices and Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 31-200-1The Army Maintenance Management System (TAMMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 738-750

A-3. ARMY REGULATIONS

Reporting of Transportation Discrepancies in Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 55-38Malfunctions Involving Ammunition and Explosives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 75-1Accident Reporting and Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 385-40Policies and Procedures for Firing Ammunition for Training,Target Practice and Combat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 385-63Fire Prevention and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 420-90Report of Item and Packing Discrepancies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 735-11-2

A-4. DOCTRINAL, TRAINING AND ORGANIZATIONAL PUBLICATIONS

Explosives and Demolitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 5-250Boobytraps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 5-31Engineer Field Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 5-34Explosive Ordnance Disposal Service and Unit Operations. . . . . . . . . . . . . . . . . . . . . . . . . . FM 9-15Special Forces Operations . . . . . . . . . . . . . . . . . . . . .