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The Peltier drier requires electrical power for operation. This is available from the
analyzer through the drier’s electrical connector. When operating the Peltier drier,
the analyzer’s battery life is limited to 2 hours, approximately. It is therefore
recommended, but not necessary, to use the battery charger for longer operation.
The Peltier drier will maintain the sample at a certain temperature below ambient
temperature to ensure no further condensation inside the analyzer. You can control
this temperature differential by adjusting the “COOLER DUTY CYCLE”, if
necessary.
The following table shows the approximate relation between duty cycle and
temperature differential:
DUTY CYCLE
SAMPLE TEMP AMBIENT TEMP (°F)*
50% -9
75% -13
100% -16
*At 75°F ambient.
Battery life for the analyzer with the Drier in operation is approximately 2.5 hours
for 50% duty cycle to 1.5 hours for 100% duty cycle, assuming freshly charged
batteries, or new alkaline batteries.
This temperature differential between sample temperature and ambient temperature
is set at the factory to 70% but can be adjusted as follows:
1. Press the SHIFT key. SETUP MENU will be displayed.
2. Press the ENTER key to select SYSTEM SETUP.
3. Press the UP/DOWN keys until the cursor points to COOLER DUTY.
4. Press the ENTER key.
5. Use the UP/DOWN keys to set the Peltier duty cycle. A minimum of 50% is
recommended.
6. Press the ENTER key.
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