Hach LT 200, User Manual, Page: 12 / 272

Table 4 Stored programs—DRB 200 (continued)
Program Description
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 LT 200 has six temperature programs that are configured by the
user (PRG1–PRG6). 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 150 °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.
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:
12 English