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Example 3: Tracking Test - 12S(N) meter
Meter:
Electromechanical, Form 12S
Voltage:
120V, 3-wire network
Kh:
14.4
TA:
30
CL:
200
Accessory:
None
When Tracking Test is chosen, it consists in applying a 30A (HL) load for 10
revolutions. No pickup is used for this test. The test can be started and ended by the
START/STOP TEST button or by using a magnet on the side of the tester
(see figure 2.2).
The meter setup will be displayed on your wireless device with the form 12S and a
TA of 30A. A 12S will be detected if the meter has the 9 o'clock contact terminal
pressed down on the proper piston on the front of the test socket. However, if a
meter has a 6 o'clock terminal, the form detected would be 2S. In that case, use the
drop-down menu to select form 12S instead of 2S. Once the proper form appears,
press NEXT.
By default, the selected Kh for a 12S meter is 14.4. It can be changed in the Tests tab
using the Select meter Kh. The test is done over 10 revolutions by default, but you
can change the value by clicking on the number of revolutions and entering the
desired value.
1. Performing Tracking mode test
In the Manual Test page, toggle the selected mode to Tracking. In the Rev select the
desired amount of revolution. By default, the revolution will be set at 10.
The load current will increase to 3A and the disk will start to rotate slowly. When the
black flag of the disk lines up with the black line (on the meter nameplate), apply a
magnet on the side of the socket to initiate the test and change the current from 3A
to 30A. At this precise moment, the internal electronic standard of the MT-1/WT3
begins to register the energy that goes through the meter.
Note: it is easier to start and end a test when the disk rotates slowly by pressing
TOGGLE LOAD to change between HL to LL and to LL to HL.
On this display, the internal electronic standard measures the energy that passes
though the meter.
Press on TOGGLE LOAD. The current will increase to 30A and the disk will rotate
rapidly.
The socket emits a beep each time the disk has completed one revolution.
At the 9th revolution, the sound of the beep is different to warn that the end of the
test is near. The socket switch to LL to slow down the disk then, when the black flag
MT-1/WT3 User Guide
Page • 31
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