Oldham MX62, User Manual

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Page 24
values up to a maximum of
–
10% of the detection range can only be
configured by OLDHAM). Though the detector should be calibrated
measuring is still given.
The signal is not latching.
Display, messages, outputs:
LED module: LED Under scale (arrow down) is on
System: all LED are off, no relay is activated
RBM/REM: corresponding relay for under scale is activated
AAM: 4-20 mA: signal output of detector
0-10 V: 0 V
LCD module: measured value: < 0
message: under scale
Printer: message: US
3.3.6. Over scale (OS)
As standard the threshold for over scale equals the upper range value.

Optional the threshold value can be set below the end scale value (a
specific configuration with ConfigPro is needed). In this case the
behavior of the WinPro at over scale is the same as normal alarm
mode (see chapter 3.3.2).
In case of over scale, the signal of the detector will be higher than 20 mA.
Detection is still given but the signal is above the detection range. The
measured value can only be defined as concentration above the end scale
value but no indication is available how far the end scale value has been
exceeded.
Usually, this alarm is configured to be latching.

Some detectors require special action to be taken after they have
been exposed to high gas concentrations. Calibration and adjust
ment might become necessary. Please refer to the recommendations
in the manuals for the respective detectors.
Display, messages, outputs:
LED module: LED Over scale (arrow up) is on
System: all LED are off, no relay is activated
RBM/REM: corresponding relay for over scale is activated
AAM: 4-20 mA:
latching alarm: 22 mA
non-latching alarm: signal output of detector
0-10 V: 10 V