ENMET MX-52 - Manual (Page 34)

ENMET Corporation MX52 C ONTROL
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Calibrate the sensor/transmitter:
Adjust the sensor/transmitter gain.
Apply appropriate calibration gas to the sensor.
When signal has stabilized, set the sensor/transmitter gain according to the instructions furnished with that device
Calibrate the MX52 C ONTROL :
3. Third match the MX52 C ONTROL display to the S/T display, set the value of the calibration gas on the MX52
display panel by using the channel sensitivity potentiometer (Item A, Figure 11).
4. Finally set the MX52 C ONTROL current to the calibration output, adjust the current output by using the 20 mA
potentiometer to the appropriate output for the calibration gas being used (Item B, Figure 11).
Example of calibration current output: For a channel with a scale of 0 – 100 ppm:
If 100ppm gas is used to calibrate the S/T, the calibration current output should be set to 20mA
If 50ppm gas is used to calibrate the S/T, the calibration current output should be set to 12mA
Conclude Calibration of the MX52 C ONTROL :
Stop the injection of calibration gas, wait for the measurement to return to zero (on the MX52 display panel).
Then, press the “CALIBRATION” key (Item C, Figure 10). The flashing yellow LED goes out and the “C” on
the display panel disappears. The channel now operates normally and calibration has been completed.
Figure 11: Potentiometer Layout on Front of Channel Board