5-2 | Thermox Series 2000 WDG-IV / IVC / IVCM
Denitions
Calibrations vs. Verications
The Series 2000 control unit software refers to both calibrations and verifi-
cations. During a verify operation, the calibration gas readings are taken,
and the difference between what the system records for the gas values
and their known values is recorded. Internal calibration parameters are
not changed. Verify operations are often used to check that the instru-
ment is running within required tolerances.
On the other hand, during a calibration software, algorithms adjust the
difference between the current readings and the known calibration gas
values until they are equal. In this chapter, when we speak about a calibra-
tion in a general sense, we are referring to either a verification or a calibra-
tion.
Span and Zero Calibration Gas Denitions
This chapter also refers to the terms span and zero calibration gases. The
span gas is the high calibration gas. The zero gas is the low calibration gas.
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