Hach DRB 200 User Manual page 11

N O T I C E
To prevent instrument damage, do not use cleaning agents such as
turpentine, acetone or similar products to clean the instrument
including the display.
1. Turn the instrument off and disconnect the power cord.
2. When the instrument is cool, clean the surface of the instrument with
a soft, moist cloth and a weak soap solution. Make sure that no water
gets into the instrument.
If the liquid in a sample cell spills or a sample cell breaks:
1. Turn the instrument off and disconnect the power cord.
2. Let the temperature of the heating block(s) and sample cells
decrease until cool.
3. Remove the liquid with a pipette. Do not let the liquid touch skin.
4. Move the liquid to the correct disposal.
5. Remove broken glass using tweezers. Remove any remaining liquid
on the instrument. Do not let the liquid touch skin.
7.2 Measure the temperature of the heating block
Measure the temperature of the heating block to make sure that the
temperature shown on the display is correct.
The temperature shown on the display is the temperature in a closed
sample cell that is filled with a liquid. While the temperature of the
heating block is increasing, the temperature of the heating block, near
the heater, may be greater than the temperature shown on the display.
Tools needed:
• Sample cell (2275800)
• Glycerol (anhydrous), 5 mL
• Thermometer, stem-type, calibrated for 95 to170 °C (203 to 338 °F)
To measure the temperature of the heating block:
1. Fill a clean, empty sample cell with glycerol that is at room
temperature.
2. Put the thermometer in the sample cell until the thermometer touches
the bottom of the sample cell.
3. Make sure that the level of the glycerol is 56 mm ± 0.5 mm (2.20 in.
± 0.02 in.) from the bottom of the sample cell when the thermometer
is in the sample cell.
4. Put the sample cell in the center opening of the second row of the
heating block.
5. Select a temperature program of 150 °C for 60 minutes using the
keys, then push OK.
6. When the heating block is at the selected temperature (two beeps
are heard), the thermometer temperature should be the same as the
temperature shown on the display.
Section 8 Troubleshooting
Refer to Table 4 for error messages, possible causes and corrective
actions.
Table 4 Error messages
Error
BLOCK IS TOO HOT! The temperature of the heating block is greater
than the selected temperature. Wait until the
PLEASE WAIT
temperature of the heating block decreases.
INIT ERROR The instrument is defective. Contact Customer
Service.
Section 9 Replacement parts and accessories
W A R N I N G
Personal injury hazard. Use of non-approved parts may
cause personal injury, damage to the instrument or
equipment malfunction. The replacement parts in this section
are approved by the manufacturer.
Note: Product and Article numbers may vary for some selling regions. Contact the
appropriate distributor or refer to the company website for contact information.
Solution
English 11