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Example 7: Four-Quadrant (Wh) Test – Solid-State 9S Meter
Meter:
Voltage:
Kh:
TA:
CL:
Accessory:
A Four-Quadrant (Wh) Test consists in running the equivalent of a Quick Test at
various phase angle lags to assess the meter's ability to register energy in all four
quadrants of the power vector diagram.
Please note that the meter's three potential coils are automatically switched in
parallel by the socket.
1. Connect the optical pickup
To connect the cables:
•
Plug the RJ12 connector at the end of the Optical Pickup's straight cable
into the socket's I/O port.
•
Look for the meter's LED output pulse and position the Optical Pickup's
suction cup over it.
Note: An adapter may be required on some meters and can be purchased as an
option.
Note: Some high-end meters can have two pulse outputs, one for the Watthour
reading and one for the VARhour reading. Connect the Optical Pickup to the
Watthour pulse output before starting the test.
2. Starting a Four-Quadrant (Wh) Test
Once the installation is complete and the connection to the socket and meter setup
is done (see previous section), you can proceed with the test.
Select "Four-Quadrant (Wh) Test".
Start the sequence. The load current will increase to HL, the meter will start to send
pulses and the internal electronic standard will begin to register the energy passing
through the meter. The test can be stopped at any time.
In addition to the test parameters appearing on the display, you can see the voltage
and current applied to the meter, the chronometer and the cumulated energy
registered by the electronic standard.
Solid-State, Form 9S
120-480V
1.8
2.5
20
Optical Pickup
MT-1/WT3 User Guide
Page • 39
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