Performing Function Test With Co; As A Non-Toxic Alternative - Simtronics GD1 MK3 Operating Manual

Verify the 4 – 20 mA output.
The output should change according to the
4
length of the Test Cell multiplied with the gas
concentration. The table below contain some
typical values
Note! Depending on the precision of the gas mix inside the Test Cell, do not expect to see
an exact 1:1 response compared to the test gas concentration.
Gas concentration
(ppm)
50
100
185
300
690
1. The expected response on the GD1 can be calculated from the following formula:
Response_GD1 = length_test_cell (meters) * gas_concentration (ppm) + noise
2. ** A test gas with approximate 50% full scale response is good practice.
3.4.1.

Performing function test with CO

As a non-toxic alternative to using H
for a peak in the CO
terminal through the service interface. The CO
mA analogue output.
GD1
Functional test finished!
where the noise normally varies at less than ± 8 ppm*m.
S for the functional test, the GD1 is also set up to look
2
wavelength. This response however, is only available using a Web
2
Expected output value (ppm*m):
<length> * <concentration>
Expected response
Test Cell (length 0.54 m)
(ppm*m)
27
54
100 (50% full scale)
162
373 (out of default range)

as a non-toxic alternative

2
measurement is not available on the 4-20
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850-816926-EN R06