User's Manual

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REX Meter
5 Testing Technical Manual
5-6 30 November 2006
Te s t Set u p
Before testing the REX meter, check the nameplate for the following:
■ test amperes
■ appropriate operating voltage range
■ meter K
h
General test setup.
Use only authorized utility procedures and proper test procedures to test
metering equipment. Dangerous voltages are present. Equipment damage,
personal injury, or death can result if safety precautions are not followed.
The following general procedure should be used to create a test location for the
REX meter:
1. Temporarily install the meter in a mounting device that will hold it in the
proper operating position.
2. Place the test standard measuring device and precision voltage and
current transformers (as required) in series with the meter being tested.
If voltage transformers are not required, then the voltages of the meter
and the standard should be in parallel.
3. Connect the control equipment used for switching the voltage to the
test standard device and for counting the standard’s output pulses.
4. Apply the rated current and voltage to the terminals of the meter.
After applying the voltages and currents, one of the following should be
performed:
■ Align the reflective pick-up assembly over the appropriate pulse
indicator on the meter LCD, just slightly off of perpendicular with the
meter cover. This will minimize reflections from the cover face.
■ Position the infrared pick-up head over the test LED to detect the pulse
output. Alternatively, the infrared pick-up head could be connected to a
test pulse adapter, and that adapter can be positioned over the test
LED on the meter (recommended). See Figure 5-3 for the location of the
test LED on the REX meter.