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Example 3: Tracking Test – 12S(N) Meter
Meter used:
Electromechanical, form 12S
Voltage:
120 V, 3-wire network
Kh:
14.4
TA:
30
CL:
200
Accessory:
None
When "Tracking Test" is chosen, it involves applying a 30 A (HL) load for 10
revolutions. No pickup is used for this test. The test can be started and ended with
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 30 A. Form 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 "Select meter Kh." The test is performed over 10 revolutions by default,
but you can change this by clicking on the number of revolutions and entering the
desired value.
1. Performing a Tracking Mode Test
On the "Manual Test" page, toggle the selected mode to "Tracking." In "Rev," select
the desired revolutions. The default setting is 10.
The load current will increase to 3 A and the disk will start to rotate slowly. When
the black flag on the disk lines up with the black line (on the meter nameplate), apply
a magnet to the side of the socket to start the test and change the current from 3 A
to 30 A. At this precise moment, the MT-1/WT1's internal electronic standard will
begin registering the energy passing through the meter.
Note: It is easier to start and end a test when the disk is rotating slowly. Press
"TOGGLE LOAD" to toggle between HL and LL and vice versa.
On this display, the internal electronic standard measures the energy passing though
the meter.
Press on "TOGGLE LOAD." The current will increase to 30 A and the disk will begin
rotating rapidly.
The socket will emit a beep each time the disk has completed one revolution.
MT-1/WT3 User Guide
Page • 31
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