© 2020 All rights reserved. Data subject to change without notice.
47
Rev. B | 2020.07
cGas Detector Analog Transmitter - Operation Manual
9.3.4 Zero Override
If the gas level (possible residual gas) is too high, but still within the override
range, the display will indicate that an override is required.
Override?
-1PPM
N
>Y
To override the value use the UP button to select Y and press ENTER. To keep
the original zero value, leave the indicator on N and press ENTER.
9.3.5 Span Override
During the Span calibration, readings are taken and from the results sensitivity
is calculated and compared to the original sensitivity of the sensor at the time
of installation. If this sensitivity is below the override range, but above the fault
limit, the display will indicate that an override is required. To override the value
use the UP button to select Y and press ENTER. To keep the original value, leave
the indicator on N and press ENTER.
Override?
1953 AD 19
N
>Y
9.4 Calibrating the Analog Output (requires a 4-20 mA meter)
NOTE:
The analog output is calibrated at the factory prior to shipping and
should not require re-calibration in the field.
The output mode of the cGas Detector is a current loop. If you find the
instrument is not outputting what is expected, you can recalibrate the analog
output. The values entered in the Set Analog Ouput Zero and Set Analog Output
Range are the values the device will be calibrated to (by default 4 mA and 20
mA respectively).
To calibrate the analog output you will need an electronic multi-meter that
measures current. The multi-meter connects to the S1 and G position on the
terminal block.