Column Heater Or Column Heater/Cooler Test - Waters Alliance e2695 Operator's Manual

To run the defrost sample heater/cooler function:
1. In the Other Diagnostics screen, select Defrost, and then press OK.
2. Press Start.
3. Open the sample compartment door when you are prompted.
Requirement: To complete this procedure, the sample compartment door must remain open
during the entire procedure.
The Defrost Sample Heater/Cooler screen indicates when the procedure ends and prompts to
close the sample compartment door.
Note: A log entry results if the Sample Heater/Cooler Defrost diagnostic is interrupted or
terminated prematurely.
8.4.12

Column heater or column heater/cooler test

The column heater (or column heater/cooler) test tests the column heater or column heater/cooler
for proper functioning by increasing the temperature in the column heater.
You can monitor the column heater or column heater/cooler temperature by connecting a chart
recorder to the Chart Out terminals on the rear panel of the separations module.
Before you perform the column heater (or column heater/cooler) test, confirm these things:
• The sample heater/cooler is not in use.
• The sample compartment temperature is between 18 and 28 °C.
Requirement: To ensure the accuracy of this test, do not open the column heater or column
heater/cooler door during the test.
To perform the column heater or column heater/cooler test:
1. In the Other Diagnostics screen, select Column heater (or Column heater/cooler), and then
press OK.
2. On the Column Heater or Column Heater/Cooler Diagnostic screen, press Start.
Result: These events occur during the test:
• The software prompts you to close the column heater module door.
• The column heater test begins at ambient temperature.
• The column heater temperature ramps up (for about 8 minutes).
• The system measures the increase in temperature.
When the test ends, the Column Heater or Column Heater/cooler Diagnostic screen displays the
pass/fail status and the change in temperature.
February 27, 2018, 715003794 Rev. C
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