PolyGard
®
is a registered trademark of MSR GAMGC2-K_E_0320
Phone 0049(0)8531/9004-0 Fax: 0049(0)8531/9004-54 Specification subject to change without notice
MSR-Electronic GmbH, Bgm.-Schoenbauer-Str. 13, D 94060 Pocking www:msr-electronic.de Made in Germany
8.7.3 Alarm Thresholds / Hysteresis
For each measuring point four alarm thresholds are available for free definition. If the gas concentration is
higher than the set alarm threshold, the associated alarm is activated. If the gas concentration falls below the
alarm threshold minus the hysteresis the alarm is reset again. In the mode “Alarm at falling” the corresponding
alarm is set in case of falling below the set alarm threshold and reset again when exceeding the threshold plus
hysteresis.
The presentation of the alarm thresholds depends on the set measuring range: See chapter Gas Type and
Measuring Range.
The alarm thresholds are freely selectable in the range from 0 to 100 % of the measuring range.
The alarm threshold is only stored, if the value is ≥ than the lower alarm threshold
Unused alarm thresholds have to be defined with 0, in order to avoid undesired alarms.
Higher-level alarms automatically activate the lower-level alarms.
Lowest hysteresis: 3 % of the lowest alarm threshold
Highest hysteresis: 50 % of the lowest alarm threshold
Gas concentration > Threshold 1 = Alarm 1
Gas concentration > Threshold 2 = Alarm 2
Gas concentration > Threshold 3 = Alarm 3
Gas concentration > Threshold 4 = Alarm 4
Gas concentration < (Threshold X –Hysteresis) = Alarm X OFF
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