Customer Supplied Remote Calibration Initiation - Ametek Thermox CEM O2/TM User Manual

CONTROl SIGNAlS
Calibration Control Signal
(labeled Aspirator on control unit)
Zero Cal Gas
(labeled Zero on control unit)
Span Cal Gas
(labeled Span on control unit)
* High signal is 15 volts (sources current)
Low signal is 0 volts (no current sourced)
Maximum source current – 250 mA
Figure 3-7.
Control Unit signals to
initiate a remote calibration.

Customer Supplied Remote Calibration Initiation

You can also use the Series 2000 control unit signals to create your own
remote calibration initiation sequence as described below. These signals
allow you to control the valves you use to switch between the process gas
and the calibration gases.
*hIGh OR lOW SIGNAl FROM
CONTROl UNIT
System Calibrating – High
System Not in Cal. – Low
Calibrating Zero Gas – High
All other times – Low
Calibrating Span Gas – High
All other times – Low
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Installation 3-9