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Type SP87300 SAFE-T SHP9Explosion Proof Stirring Hot Plate

LT873X1 •12/29/10 Serial Number _____________________________________

OPERATION MANUAL

SERIES 873

UL Listed for Class I,Group C and D Hazardous Locations

Model # Voltage DescriptionSP87325 120 9.13” X 9.13” (23.2 cm X 23.2 cm)

Aluminum Top

SP87324 100 9.13” X 9.13” (23.2 cm X 23.2 cm)Aluminum Top

U.S. Patent No. 5,834,739

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Table of Contents

Safety Information ..............................................................................................................................................3Alert Signals..................................................................................................................................................3Warnings ......................................................................................................................................................3Summary of Hazardous Atmospheres..........................................................................................................4

Introduction..........................................................................................................................................................5Intended Use ................................................................................................................................................5General Usage..............................................................................................................................................5Principles of Operation ................................................................................................................................5

General Specifications ........................................................................................................................................6Installation ..........................................................................................................................................................7

Site Selection................................................................................................................................................7Operation ............................................................................................................................................................8

Heating Specifications ..................................................................................................................................8Setting the Temperature ..............................................................................................................................9Use of Dial Thermometer..............................................................................................................................9Heating Metal Vessels ..................................................................................................................................9Heat-up Time Guide....................................................................................................................................10Stirring Speed Specifications......................................................................................................................10Setting the Stirring Speed ..........................................................................................................................10Stirring Speed Guide ..................................................................................................................................11

Maintenance and Servicing ..............................................................................................................................12Ordering Procedures ........................................................................................................................................13Warranty ............................................................................................................................................................16

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SAFETY INFORMATION

Summary of Hazardous AtmospheresChemicals/atmospheres designated as Class I, Group C and Group D in accordance withthe National Electric Code, National Fire Protection Association (NFPA 70).*

* Not a complete list. For a morecomplete list of flammable chemi-cals, see classification of gases,vapors, and dusts for electricalequipment in hazardous (classi-fied) locations, NFPA 497.

WarningTo reduce the risk of fire orexplosion, do not operateor install the SAFE-TSHP9 where the markedoperating temperature(T2A, 280°C) exceeds theignition temperatures ofthe chemicalvapors/hazardous atmo-spheres present.

GROUP CHEMICAL/ATMOSPHERE IGNITION TEMPERATURESC Acetaldehyde 175°C, 347°FC Diethyl Ether 160°C, 320°FC Ethylene 450°C, 842°FC Unsymmetrical Dimethyl Hydrazine (UDMH) 249°C, 480°FD Acetone 465°C, 869°FD Acrylonitrile 481°C, 898°FD Ammonia 498°C, 928°FD Benzene 498°C, 928°FD Butane 288°C, 550°FD 1-Butanol 343°C, 650°FD 2-Butanol 405°C, 761°FD n-Butyl Acetate 421°C, 790°FD Cyclopropane 503°C, 938°FD Ethane 472°C, 882°FD Ethanol 363°C, 685°FD Ethyl Acetate 427°C, 800°FD Ethylene Dichloride 413°C, 775°FD Gasoline 280-471°C, 536-880°FD Heptane 204°C, 399°FD Hexane 225°C, 437°FD Isoamyl Alcohol 350°C, 662°FD Isoprene 220°C, 428°FD Methane (Natural Gas) 630°C, 999°FD Methanol 385°C, 725°FD Methyl Ethyl Ketone 404°C, 759°FD Methyl Isobutyl Ketone 440°C, 840°FD 2-Methyl-1-Propanol 416°C, 780°FD 2-Methyl-2-Propanol 478°C, 892°FD Naptha (Petroleum Naptha) 288°C, 550°FD Pyridine 482°C, 900°FD Octane 206°C, 403°FD Pentane 243°C, 470°FD 1-Pentanol 300°C, 572°FD Propane 450°C, 842°FD 1-Propanol 413°C, 775°FD 2-Propanol 399°C, 750°FD Propylene 455°C, 851°FD Styrene 490°C, 914°FD Toluene 480°C, 896°FD Vinyl Acetate 402°C, 756°FD Vinyl Chloride 472°C, 882°FD Xylenes 464-529°C, 867-984°F

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Intended UseThe Type SP87300 SAFE-T SHP9 Stirring HotPlate is UL listed and has been designed tomeet OSHA and other safety standards. It isused for procedures requiring temperaturesfrom 100°F (38°C) to 424°F (218°C).

The unit consists of 1) a heated aluminumtop plate, 2) an adjustable electronic tempera-ture control and 3) an adjustable electronic stir-ring speed control. See Figure 1 for the shapeand general features of the unit.

General UsageDo not use this product for anything other thanits intended usage.

Principles of OperationThe top plate is heated by a tubular heatingelement cast into an aluminum top plate. Thetemperature of the plate is controlled by a pri-mary electronic feedback control. The primaryelectronic control serves to limit the top platetemperature under normal operating condi-tions. A secondary bimetallic thermostat is in-stalled as a safety feature to control the tem-perature should the primary electronic controlfail. The secondary control will limit the topplate temperature to 280°C (536°F). The stir-ring speed on a SAFE-T SHP9 is controlled byan electronic control. The stirring motor locatedin an explosion-proof enclosure is combinedwith a powerful magnet to provide excellentcoupling with a stir bar. All control andelectrical connections are contained within thealuminum explosion-proof enclosure. Tempera-ture monitoring is provided by inserting a ther-mometer in the top plate well. (The thermome-ter is optional — part # MEX126.)

NoteThe Type SP87300 SAFE-T SHP9Stirring Hot Plate is UL listed explosion-proof for Class I, Division I, Group Cand D locations where flammablegases or vapors are present in suffi-cient quantities to produce explosive orignitable mixtures. The Group C and Dclassification specifies hazardousatmospheres containing either flamma-ble gases or vapors of flammable liq-uids (see NFPA 497 and NFPA 321).

Introduction

Note: Max Temp. is the Temp. at the center of top plate.

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Site SelectionInstall the SAFE-T SHP9 Stirring Hot Plate ona level, sturdy surface and allow space for ven-tilation.

The electrical specifications are located onthe back of the stirring hot plate. Consult cus-tomer service if your electrical service is differ-ent than that listed on the specification plate.

Your SAFE-T SHP9 Stirring Hot Plate isdesigned for permanent installation. Permanentinstallation is made possible with integralmounting lugs and 1/2” (1.3 cm) conduit with18” (45.7 cm) of lead wire provided.

Leads are factory sealed to meet therequirements of Article 501 of the NationalElectrical Codes (NEC). The SAFE-T SHP9Stirring Hot Plate must be hardwired per NEC(USA) or CEC (Canada) requirements.

An external switch or circuit breaker needsto be included in the building installation inclose proximity of the unit as a means to dis-connect supply circuit. Overcurrent protectiondevices should be included in the installation.The unit can be connected to a branch circuitnot exceeding 20 Amps.

The stirring hot plate installation must con-form with installation requirements for electricalequipment intended for use in Class I, Group Cand D hazardous locations as defined by theNEC and electrical code requirements of yourarea.

CautionMinimum allowable spacing betweenstirring hot plate and any vertical sur-face is one inch (2.54 cm).

WarningTo avoid electrical shock this stirring hotplate must be installed by a competent,qualified electrician who is familiar withinstalling explosion-proof electricalequipment and ensures compatibilityamong the stirring hot plate specifica-tions, power source and groundingrequirements. Grounding requirementsfor hazardous areas are specified inArticle 501 (and Article 250) of theNational Electrical Code. Consult localelectrical code requirements also. Allunits are provided with an equipmentgrounding lead that should be used asthe primary equipment ground connec-tion for the unit.

Installation

CautionTo reduce the risk of fire or explosion,do not install where the marked operat-ing temperature exceeds the ignitiontemperature of the hazardous atmos-phere(s).

CautionThe wooden shipping support attached tothe bottom of the SAFE-T SHP9 stirringhot plate must be removed prior to per-manent field installation.

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Heating SpecificationsElement Type: Cast-in Tubular Heating Element

Temperature range at the center of hotplate:

38°C - 218°C ± 3°C

Temperature cut-off: 235°C ± 9°C

Heat-up time to maximum temperature (218°C,unloaded top plate): 16.5 minutes at nominal volt-age

Temperature stability at center of top plate sur-face at 70°C: ±1°C

Temperature stability at center of top plate sur-face at 218°C: ±3°C

Uniformity of top plate surface at 70°C (center to1” or 2.54 cm from corners): ±2°C

Uniformity of top plate surface at 218°C (centerto 1” or 2.54 cm from corners): ±10°C

Accuracy of the temperature indicated on the dialthermometer (see note at left) (optional) vs. theaverage hot plate temperature when the unit isoperating at 70°C: ± 3.5°C

Accuracy of the temperature indicated on the dialthermometer (see note at left) (optional part) vs.the average hot plate temperature when the unitis operating at 218°C: ±10°C

Dial marks for heat control knob settings are forreference only. The dial marks indicate approxi-mate hot plate temperature in °C (±15°C).

Operation

CautionThe aluminum top plate is easilystained. Do not use a wire brushto clean the unit. Using a wirebrush will modify the integrity ofthe surface and it could affect yourheat stability. Wipe the top platewith water only, using a lightlydampened non-abrasive cloth.

WarningDue to the nature of this product,operator safety will be endangeredshould maintenance or servicing beperformed on it.

CautionMaximum load of the top plate is25 lbs. (11.3 kg).

NoteAccuracy of the dial thermometer(part # MEX126) is ±3°C.

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OPERATION

Setting the TemperatureDial (Control) Switch Turn clockwise to thedesired temperature. Dial marks indicate ap-proximate surface temperature in °C. When thetemperature for a given dial setting has beenreached, the control will regulate the hot plate.To turn OFF hot plate, turn dial switch fullycounterclockwise to the OFF position.

Use of Dial ThermometerThe optional dial thermometer (part # MEX126)can be used to set and monitor the tempera-ture of the aluminum top plate.

Heating Metal VesselsMetal vessels may be heated safely on theSAFE-T SHP9 without the danger of the vesselreflecting enough heat back to the top to causethe aluminum to soften. The electronic controlin the SAFE-T SHP9 will regulate the alu-minum top plate temperature.

WarningTo prevent ignition of hazardous atmos-pheres, the aluminum explosion-proofenclosure chambers must be keptclosed (screws securely tightened)whenever the unit is in operation and/orconnected to power supply circuit.

Hot Surface“Caution: Hot Surface. Avoid Contact.”The top plate will remain hot withoutvisual indication for some time afterthe unit is turned off.

WarningTemperature cycling over a temperaturerange greater than 5°C with a period ofapproximately 6 minutes may be observedwhen operating the SAFE-T SHP9 at220°C or higher. If such cycling isobserved, the unit is functioning underabnormal or fault conditions and the sec-ondary bimetallic thermostat is controllingthe top plate temperature. Under these cir-cumstances, the unit should first be turnedoff at both the heat and stir dial switchesand the external circuit breaker andallowed to cool completely. Next, in anatmosphere absolutely free of flammableliquids, gases, and/or vapors, test the heatcontrol function of the SAFE-T SHP9 atseveral temperature settings within therange of 38°C to 220°C. If the top platetemperature of the unit again cycles with aperiod of approximately 6 minutes over atemperature range greater than 5°C whenramping to or operating at 220°C, returnthe unit to the factory.

WarningTo prevent ignition of hazardous atmos-pheres, do not use electrical equipmentsuch as a thermocouple and pyrometerto monitor the hot plate temperatureunless it is UL listed for the same haz-ardous atmospheres and temperaturerating as the SAFE-T SHP9. The ther-mocouple and pyrometer could serveas a source of ignition.

Unit*Temperature

SetpointFlask Size

Amount of

Solution

Time to

Vigorous Boil

SP87325 (120V)Max.Dial

Setting 230℃1 Liter 600 ml water 60 min.

Unit* FlaskSize

Stir BarSize

Amount ofSolution Viscosity Maximum

Speed**

SP87325 1 liter 2 in. 600 ml water 1,200 rpm

SP87325 1 liter 2 in. 600 ml corn oil 1,200 rpm

SP87325 1 liter 2 in 600 ml 30 weightmotor oil 950 rpm

SP87325 500 ml 2 in 350 ml 1,265 centipoiseviscosity std. 400 rpm

SP87325 1 liter 2 in 350 ml corn syrup (light) 70 rpm

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Stirring Speed Guide(All stirring speed measurements made at21.5°C)

*The SP87324 unit performs similarly.**Maximum speed obtained without the stir barlosing coupling with the magnet in the SAFE-TSHP9.

OPERATION

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Maintenance and Servicing

CautionTo reduce the risk of the ignition ofhazardous atmospheres, no repairsare to be made to this product.

Due to the nature of this product, operator safetywill be endangered should maintenance or ser-vicing be performed on it by the operator. Theunit does not contain serviceable parts.

For the name of the authorized Thermo Scientific product dealer nearest you or any additional information, contact us:

North America: USA/Canada +1 866 984 3766 (866-9-THERMO) www.thermo.comEurope: Austria +43 1 801 40 0, Belgium +32 2 482 30 30, France +33 2 2803 2180, Germany national toll free 08001-536 376,Germany international +49 6184 90 6940, Italy +39 02 02 95059 434-254-375, Netherlands +31 76 571 4440, Nordic/Baltic countries +358 9 329 100,Russia/CIS +7 (812) 703 42 15, Spain/Portugal +34 93 223 09 18, Switzerland +41 44 454 12 12, UK/Ireland +44 870 609 9203Asia: China +86 21 6865 4588 or +86 10 8419 3588, India toll free 1800 22 8374,India +91 22 6716 2200,Japan +81 45 453 9220,Other Asian countries +852 2885 4613Countries not listed: +49 6184 90 6940 or +33 2 2803 2180