Ametek Thermox 2000 ATEX Series, Руководство пользователя

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5-2 | Thermox Series 2000 WDG-HPII / HPIIC - ATEX
Definitions
Calibrations vs. Verifications
The Series 2000 control unit software refers to both calibrations and
verification s. 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 param-
eters are not changed. Verify operations are often used to check that the
instrument 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. When we speak in this chapter about a
calibration in a general sense, we are actually referring to either a verifica-
tion or a calibration.
Span and Zero Calibration Gas Definitions
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.