05311001B / Revision 4
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The output values will continue to be derived
from the sample gas measurements, even
though these output values may be erroneous.
mA output range
0 – 20 mA or 4 – 20 mA
Underrange
Any value below 4 mA
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Only available if the 4 – 20 mA output range is selected; this sets the lowest output
current during normal operation, and allows out of range and negative gas concentrations
to be monitored through the mA output. For example, with an under-range setting of
3.8 mA, the mA output can be less than 4 mA (which indicates a the Range low level),
down to a minimum of 3.8 mA, where an output between 3.8 mA and 4 mA indicates a
gas concentration below the range low level.
The mA Jam condition should be set to low so that the
monitoring system can detect instrument faults.
La condition mA Jam devrait être réglé à basse afin que le
système de surveillance permet de détecter les défauts
d'instrument.
6.4.3 Setting up the mA output parameters
1.
Select
Set up
mA output.
2.
Select the required measurement range option.
Figure 21 -The mA configuration screen (one measurement instrument)
Figure 22 - The mA range screen
3.
Return to the mA configuration screen (Figure 21) and select 'Set up'
option.
4.
Edit the range high level and low level.
