Ametek Thermox 2000 ATEX Series, Руководство пользователя

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Calibration | 5-3
Types of Calibrations
The Series 2000 control unit allows you to perform automati c, remot e, or
manual calibrations. Automatic and remote calibrations require a factory-
provided remote calibration unit (RCU) that automatically switches the
calibration gases for you; manual calibrations are performed without a
RCU, and you switch the gases.
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Automatic calibrations allow the system to calibrate itself. You define
the calibration gas values, the time each gas will flow through the
sensor, and the frequencies at which automatic calibrations will be
performed (for example, every four hours, every two days, etc.).
Then the system calibrates itself at those predefined times. You can
also use a digital input to activate an automatic calibration (see the
“Remote Calibration Unit Connections” section in the Chapter 2 for
help on how to use a digital input to initiate an automatic calibra-
tion). With the digital input method, you can initiate an automatic
calibration only, not an automatic verification. You can also start an
auto calibration using the keypad - the calibration gas run times are
predetermined.
•
For remote calibration s, you define the calibration gas values, but you
interactively determine how long each calibration gas should flow
from the RCU and into the sensor (by pressing a key on the control
unit).
•
For a manual calibratio n, you must physically switch the gases be-
cause you are not using an RCU. However, you still define the
calibration gas values.