dr800 service and maintenance

Hach DR800 Colorimeter

Service and Maintenance and Maintenance

Hach DR800 ColorimeterSpecifications

• Wavelength Ranges– DR890 - 420, 520, 560 and 610 nm– DR850 – 520 and 610 nm– DR820 – 520 nm

• Wavelength Accuracy +/-1 nm

• Light Source – LED

• Detector – Silicon Photodiode

• LCD Display

Hach DR800 ColorimeterSpecifications

• 5 User entered programs

• External Output – Infrared to RS-232 Serial using Data Transfer Adapter

• Battery Power – 4 AA alkaline batteries (battery life ~6 months)

• Photometric Range - 0-2 A

• Stray Light - <1.0% at 400nm

• Environmental Rating – IP67 Standard

Hach DR800 ColorimeterBasic Instrument Configuration

• 4844000 – DR820

• 4845000 – DR850

• 4847000 – DR890


Main Components• 4943100 Cell Assembly Cap• 4943200 Battery Cover• 4843400 Battery Holder Assy• 4845300 Bottom Housing • Top Housing

– 4943301 DR/820 ASSEMBLY – 4943302 DR/850 ASSEMBLY – 4943304 DR/890 ASSEMBLY

Instrument Components

Hach DR800 ColorimeterInstrument Components

Circuit Board Assemblies

• 48448-01 DR/820 COLORIMETER

• 48448-02 DR/850 COLORIMETER

• 48448-04 DR/890 COLORIMETER*if circuit board is changed the serial number will not

be on the board


Instrument Optics (DR890)• 4844100 Dichroic filter • Interference Filters

– 4844200 420 nm – 4844300 520 nm – 4844400 560 nm – 4844500 610 nm

• LEDs– 4848200 LED, white (D2 and

D3)– 4942100 LED, blue (D1)

• 5262800 Detector


• Due to the discontinuation of the photo-amplifier 4849400, changes were made in January of 2007 resulting in modifications to the main board and optics. – The following components are available for

replacement• 4844100 filter, Dichroic• 4844200 420 nm interference filter• 4844300 520 nm interference filter• 4844400 560 nm interference filter• 4844500 610 nm interference filter• 4848200 LED, white• 4942100 LED, blue


• The following components are no longer available for replacement

• 4844600 Housing, Top Optics• 4844700 Housing, Bottom Optics• 4849400 Photoamplifier OPT101

• The following optics assemblies are now obsolete

• 4943401 Optics assembly, DR820• 4943402 Optics assembly, DR850• 4943404 Optics assembly, DR890

Instrument Components


• Boron 4• Chlorine Dioxide, MR 7• COD, LR 16• COD, Manganic 18• Color* 19• Copper, porphyrin 22• Hydrazine 31• Hydrazine, AV 32• Molybdenum, Molybdate, HR 44• Nitrate, TNT, CAF 57• Nitrogen, TKN 65• Nitrogen, TN, TNT, CAF 58• Nitrogen, total, HR, TNT 69

• Phosphorous, Molybdovanadate 77• Phosphorous, Molybdovanadate, AV 78• Phosphorous, Phosver 3

79• Phosphorous, Phosver 3, AV 79• Phosphorous, Reactive HR, TNT

86• Phosphorous, Total, HR, TNT 87• Silica, HR 89• Silica, UHR

88• Triazole, Benzotriazole

3• Triazole, Tolytriazole 3

Test and Method Number at 420nm


• Aluminum, Aluminon 1• Bromine 5• Bromine AV 6• Chlorine, free, AV 11• Chlorine, free, HR 8• Chlorine, free, PP 9• Chlorine, free, TNT 10• Chlorine, total, AV 11• Chlorine, total, HR 8• Chlorine, total, PP 9• Chlorine, total, TNT 10• Cyanuric acid 24• Hardness, calcium 29• Hardness, magnesium 30• Iron, Ferrous 33• Iron, Ferrous, AV 33• Iron, total, Ferrover 33

• Iron, total, Ferrover, AV33

• Manganese, HR41

• Nitrate (Cd reduction) HR AV 50• Nitrate (Cd reduction) HR PP 51• Nitrate (Cd reduction) MR AV 53• Nitrate (Cd reduction) MR PP 54• Nitrate, LR

55• Nitrite,LR 60• Nitrite,LR, AV

62• Nitrite,TNT

63• Oxygen,dissolved, HR, AV

70• pH

75• Phosphorous, amino acid

85• Sulfate 91• Sulfate, AV

92• Turbidity 95• Volatile Acids

96

Test Method and Number at 520nm

Hach DR800 ColorimeterTest Method and Number at 560nm

• Chromium, Hexavalent 13• Chromium, Hexavalent, AV 14• Chromium, total 15• Copper, Bichinchoninate 20• Copper, Bichinchoninate, AV 20• DEHA^ 25• Iron, total, Ferrozine 37• Manganese, LR 43• Nickel, PAN 48• Nitrite, HR 59


• COD-HR, HR+ 17• Cyanide 23• Detergents^ (downsize) 26• Fluoride, SPADNS 27• Fluoride, SPADNS, AV 28• Iron, total, FerroMo 38• Iron, total, TPTZ* 39• Iron, total, TPTZ, AV 39• Molybdenum, ternary complex 47• Nitrogen, Ammonia, HR, TNT 67• Nitrogen, Ammonia, LR, TNT 66• Nitrogen, Ammonia, Salicylate 64• Nitrogen, monochloramine &

free ammonia, Salicylate, AV 49

• Nitrogen, monochloramine & free ammonia, Salicylate 49

• Nitrogen, Total Inorganic TNT 68• Oxygen, dissolved,LR, AV 71• Ozone, HR, AV 74• Ozone, LR, AV 72• Ozone, MR, AV 73• Phosphorous, acid hydrolyzable,

Phosver 3, TNT 82• Phosphorous, Phosver 3, TNT 82• Phosphorous, total, Phosver 3, TNT 82• Silica, LR 90• Sulfide 93• Suspended Solids 94• Zinc 97

Test Method and Number at 610nm

Hach DR800 ColorimeterMaintenance

1. Clean or replace sample compartment

2. Replace batteries

3. Replace interference filters as needed

Hach DR800 ColorimeterTroubleshooting

• Replace Main Board– E-1 unconfigured instrument– E-2 could not read program/data– E-3 could not write program/data – E-6 measurement offset error

• E-4 measurement battery error – replace batteries• E-5 measurement A/D error – replace main board or

detector• E-7 measurement low light error – replace interference

filter, LED or detector• E-8 measurement over-range error – check samples -

replace main board

Hach DR800 ColorimeterTroubleshooting

1. Keypad – spills or missing keys, older version may short out. Replace top housing.

2. Interference filters – cause accuracy issues

3. Dirty Sample Compartment – can get scratched or stained causing accuracy issues

4. Circuit board – won’t turn on, software issues

Hach DR800 ColorimeterService

• Check instrument accuracy by using Absorbance Spec Check Standards - Catalog Number 27639-00– Includes a zero standard and 3 absorbance standards

• Example Certificate

Hach DR800 ColorimeterService


Questions & Answers

dr800 service and maintenance

Documents