Bacharach Parasense GRM2 CO2 Series, Operation & Maintenance Manual

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Operation & Maintenance Manual
Doc. Ref. MNGRM2CO2 REV. 3
NOTE: The following calibration is not required during lifetime of the unit. Only
attempt this if all else fails
Sensor PCB
Sensor 4mA Calibration
1. On the GRM2 CO2 display/keypad, navigate to the System Test screen. This will halt the
sampling activity on the system for a few minutes.
NOTE: This is not required, but the sampling activity of the system may prove distracting whilst
performing the subsequent steps.
2. Connect a CC01 programming/debug lead to the CC01 programming/debug port on the GRM2
CO2 network module PCB.
3. Open a terminal program and connect to the CC01 using 9600 baud, 8 data bits, 1 stop bit, No
parity, No flow control.
4. In the terminal program:
4.1.
Enter the ‘ver’ command to confirm successful communication has been established.
5. On the Sensor PCB:
5.1. Press the A
button to enter “Cal Mode”.
5.2. Press the B button (
→
on the display) three times to show
“Sys Menu”.
5.3. Press the B button ( Y on the display) to show
“Set 4mA”.
5.4. Press the B button ( Y on the display) to enable adjustment.
5.5. Use the A and C buttons (+ and
– on the display) to change the display reading until
4.00mA is shown on the display.