Table 3 Stored programs
Program Description
COD Increases the temperature of the sample cells to 150 °C for
120 minutes. In the cooling phase, four beeps are heard
when the sample cells are at 120 °C. Remove and carefully
invert the sample cells several times, before letting them
decrease in temperature in a rack.
TOC Increases the temperature of the sample cells to 105 °C for
120 minutes. The TOC temperature program can be used
for all Hach TOC sample cell tests.
100 °C Increases the temperature of the sample cells to 100 °C for
30, 60 or 120 minutes. For example, the “100 °C,
60 minutes” temperature program is used to:
• Digest samples using the Metals Prep Set
• Identify phosphate and chromium
• Digest heavy metals
105 °C Increases the temperature of the sample cells to 105 °C for
30, 60 or 120 minutes.
150 °C Increases the temperature of the sample cells to 150 °C for
30, 60 or 120 minutes.
165 °C Increases the temperature of the sample cells to 165 °C for
30, 60 or 120 minutes.
6.3 User programs
The DRB 200 has three temperature programs that are configured by
the user (PRG1–PRG3).
To configure a user temperature program:
1. Select a user temperature program using the keys.
2. Push Prog to enter programming mode.
3. Select a 4-character name for the program. Push the left key to
change the character. Push the right arrow key to move the cursor to
the next position. Push OK to save the change.
4. Push or hold down the up and down arrow keys to set the
temperature (37 to 165 °C). Push OK to save the change.
5. Push or hold down the up and down arrow keys to set the time (0 to
480 minutes). Push OK to save the change.
6. Push OK to save the program.
Section 7 Maintenance
C A U T I O N
Multiple hazards. Only qualified personnel must conduct the
tasks described in this section of the document.
N O T I C E
Do not disassemble the instrument for maintenance. If the internal
components must be cleaned or repaired, contact the manufacturer.
7.1 Clean the instrument
Keep the instrument clean to get continuous and accurate operation.
C A U T I O N
Fire hazard. Do not use flammable agents to clean the
instrument.
C A U T I O N
Burn hazard. Do not clean the instrument when it is hot.
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