SmartZone Gateway EPA064 User Manual
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For example, if a Calibration offset of 6 was used and a sensor's true reading was 36,
the indicated reading used for display and alarm purposes would be 42. This works the
same way for both temperature and humidity sensors.
Hysteresis Value
The hysteresis default value to be applied to sensors is specified here. The value spe-
cified is an offset from a sensor's threshold values.
For example, a hysteresis value of 5 would mean that, in the case of an Upper Control
Limits alarm, the alarm value would have to reduce to 5 below the threshold value before
another alarm is issued.
Please see
Appendix B: Hysteresis Demystified
for detailed information.
Limits and Traps
You can set default values for sensor alarm thresholds here. You also can set the default
settings for alarm threshold traps here.
The following thresholds can be set:
l
Upper Control Limit
l
Upper Warning Limit
l
Lower Control Limit
l
Lower Warning Limit
You can apply default trap settings for all of these thresholds by selecting the
Trap
Enabled
check boxes. With the
Trap Enabled
check box deselected, no SNMP alarm
traps will be generated, even when an alarm condition exists for that threshold.
Repeat Timer
The repeat timer causes alarm traps to be reissued after a specified amount of time if the
alarm condition persists.
Setting the repeat timer to 0 will disable the repeat traps.
