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12-1
12: Test Mode
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
12: Test Mode
12.1: Introduction
The Nexus® 1500+ meter offers a Test Mode that lets you verify the meter’s accuracy
without affecting billing data. When a meter is put into Test Mode, all of the energy
registers are frozen, the display is set to 0, and the user can access the energy
measurement test sequences. The meter’s accuracy is determined by comparing
energy accumulated values provided by it against a well known source also monitored
by the meter.
The Energy Preset, or Preset Accumulators, feature supports Test Mode. This feature
allows a user to preset the energy accumulators to a desired value. This is important
because when a meter is in Test Mode, it is out of service and not monitoring accumu-
lations. You can use the Test Mode Preset Accumulations screens to enter a new value
that adjusts for those not monitored while the meter was in Test Mode. You can pre-
set single or multiple accumulators. The new values will take effect after you leave
Test Mode. If no preset values are entered, the Normal Mode energy accumulator val-
ues will have the same values they had when you entered Test Mode.
This feature is also useful when removing a meter from service and replacing it with a
new meter. You can use the Preset Accumulators screen to set the new meter with the
accumulation values from the old meter. This way, the new meter can continue to
accumulate where the old meter left off.
All Test Mode data can be monitored either:
• Through the meter’s display
• By polling the Modbus registers through the meter’s communication ports (see the
Nexus® 1500+ Meter’s Modbus User Manual
for detailed information on the
Modbus registers)
Some of the Test Mode data (-Wh (Q2,3), +Wh (14), +VARh (Q1,2), -VARh (Q3,4))
can also be measured using the LED pulse outputs (see the following section, 12.1.1).
All Test Mode data is provided in binary secondary units (i.e., W, Wh, VA, VAh, VAR,
VARh): no kilo-units or mega-units are used. All Test Mode energy accumulators are
formatted as 15 digit integers with 7 decimal digits; Test Mode demand is formatted
as 4 digit integers with 4 decimal digits.
Summary of Contents for Shark 100T
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