The instructions provided in this chapter describe how to set detector gases that are
controlled by PPC modules.
CAUTION
The Clarus GC PPC modules are calibrated at the factory with
their corresponding gas; however, there are exceptions. The
PPC module that controls the:
• ECD is calibrated with nitrogen.
• TCD is calibrated with helium.
• PID is calibrated with helium.
If you intend to use a gas that is different from the gas used to
calibrate the PPC module, you must recalibrate the PPC
module with the gas.
The instructional procedures in this chapter are written with the assumption that:
• You know how to measure gas flows using a flowmeter or with the Clarus
GC’s built-in stopwatch and a soap-bubble flowmeter. If you are not
familiar, prior to continuing, please read "Using the Built-in Stopwatch" in
Chapter 4, "Before You Install a Column."
• All heaters are turned OFF and cool to the touch.