Journal Limits - Dranetz hdpq xplorer User Manual

Journal Limits

Journal Limits

Journal entry
settings
Logging data by
limits
Logging data by
time
NOTE
4-38
Shop for Power Metering products online at:
HDPQ Xplorer allows power parameters to be trended using periodic readings that are
stored in a journal. Statistical information is always captured regardless of the limit
settings, so you will never be without a trend even if you did not set the limits correctly.
The system collects data even when no disturbances occur by recording periodical
statistical data (By Time).
Limit methods allow you to set the threshold units by which high and low limits of
voltage trigger and current trigger are calculated. Thresholds are set in ranges with high
limit (threshold above the normal range) and low limit (threshold below the normal
range). The following threshold limits are used to trend journal parameters:
Very High: specifies the limit for comparison that is higher than the high limit
High: specifies the limit for comparison that is higher than the low limit
Low: specifies the limit for comparison that is lower than the high limit
Very Low: specifies the limit for comparison that is lower than the low limit
Deadband: specifies how much a value can change before another event is recorded
The Very high must be greater than High, Very low less than Low. Deadbands or
sensitivity is used to record incremental changes in the parameter besides when limits
are crossed. The hysteresis values assigned to limits are fixed and not programmable by
the user. All limit values are used to determine if corresponding reporting or logging
action should take place.
You need to Enable threshold limits to capture data. The limit fields will be activated to
allow you to enter threshold values. Press the limit field (Very High, High, Low, Very
Low, Dead Band) to display the numeric keypad. Use the keypad to enter the limits for
the corresponding phase. When done, accept the new threshold limits for the journal
entry.
HDPQ Xplorer is able to measure periodic samples of the voltage and/or current
waveform. The Timed Interval menu lets you set how often you want the instrument to
record power parameter values, demand and energy, harmonics, flicker and others.
You can record data simultaneously by limits and by time. Make sure to enable the
parameters to trend under Journal Limits and Timed Intervals.
PowerMeterStore
www.
1.877.766.5412
.com