Clarus 600/680 GC User’s Guide
6-49
Zeroing and Calibrating the PPC Modules
The Clarus GC gas modules have been calibrated at the factory and are ready to
use. For good laboratory practices and your own internal validation protocol,
you may wish to recalibrate at installation with your own flow measuring device.
All carrier gas modules have been calibrated at the factory with helium. If you
are using a different gas, you must enter the appropriate gas and recalibrate.
Detector gas modules must be recalibrated if you are using a different gas in your
laboratory. In the factory, the TCD reference gas and the PID make-up gas have
been calibrated with helium and the ECD make-up gas with nitrogen.
Zeroing and calibrating PPC modules consists of the following steps:
• Zeroing the PPC gas modules (Gas turned off)
• Setting the reference temperature and pressure
• Calibrating the PPC carrier gas modules and/or PPC detector gas
modules (Gas turned on)
The calibration information is stored in a reserved area of the battery-backed
memory.
Zeroing the PPC Gas Modules
Before zeroing the PPC gas modules:
• Make sure that the Clarus GC has been properly installed and all gases are
connected.
• Turn on the Clarus GC power and allow the GC to warm up for
approximately 15 minutes before calibrating any gas.
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