5.6
Table 5.4 Analogue output span limits
Transducer Minimum
Recommended
analogue output
span
Maximum
analogue output
span
Pm 1156 O
2
0.5% O
2
200% O
2
Gfx Standard CO 200 vpm CO 6000 vpm CO
Gfx High Sensitivity CO 50 vpm CO 1000 vpm CO
Gfx NO 100 vpm NO 2000 vpm NO
Gfx Standard SO
2
500 vpm SO
2
5000 vpm SO
2
Each analogue output may be assigned to any gas sensor module.
For each range of each analogue output used the following parameters need to be set
up:-
i) Gas sensor module to which analogue output is to be assigned
ii) Range to which analogue output is to correspond.
iii) True or live zero ( ie 0 to 20 mA or 4 to 20 mA).
iv) Freeze analogue output during calibration or follow calibration sample
concentration.
See Table 5.5 for procedure.
The existing parameters for an analogue output may be edited or cleared. See Table
5.6 for analogue output clearing procedure.