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Power Quality Analyzer Model 3945-B
73
6.6.4 Alarm Conditions Configuration
TheAlarmConditionswindowallowsyoutosetup10alarmcongurations.
Figure 6-10
Hysteresis: This value for alarms is set to prevent multiple recordings of an event
that goes above the threshold and a certain percentage below it at times.
Example: Alarm threshold is 100 Volts or higher, hysteresis is 1%. When the voltage
goes up to 100V, the alarm condition starts. When it goes back down to 99V, the alarm
condition stops.
Disable All Alarms: Whenthisboxischecked,allalarmswillbedisabledevenif
theindividualalarmenableboxischecked.
Make sure this is not checked if you
want to record alarms.
Enabled: Whencheckboxischecked,alarmisenabled.
Capture Parameter: The Alarm will be triggered based on the value of the selected
parameter.
Choices include:
None: no
alarm
Vrms:
voltage root mean squared
Urms: voltage
phase minus phase root
mean squared
Arms: current
root mean squared
VPST: voltage
shorttermicker
Vcf: voltage crest factor
Ucf:
voltage phase minus phase
crest factor
Acf:
current crest factor
Vunb: voltage unbalance
Aunb: current
unbalance
Hz:
frequency
Akf: current
K factor
Vthd: voltage total harmonic distortion
Uthd:
voltage phase minus phase total
harmonic distortion
Athd: current
total harmonic distortion
W:
active power