ACM 200 Series User Manual

AMC-200 Transmitter
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Figure 5: Calibration/verification set-up procedure.
5.2.3 ADJUSTMENTS
For full recalibration adjustments, follow the Set-Up Procedure steps 1 to 6 inclusive. There are
two adjustments to be made for recalibration, Zero and Span.
Zero: When there is no gas present (clean air), the transmitter signal should be 4 mA.
This is obtained by adjusting the Zero trimmer on the transmitter. It is possible,
with certain conditions, that the “Zero” current will go below 4 mA.
Span: When the sensor is exposed to the calibration gas sample, adjust the
span trimmer on the transmitter to set the output current proportional to
the gas concentration applied.

ACM 200 Series Specifications

General

Output	4-20 mA, HART
Accuracy	±0.1% of span
Operating Temperature	-40 to 85°C
Input	4-20 mA
Frequency Range	Not applicable
Output Power	Not applicable
Modulation	Not applicable