Probewell MT-1/WT3, User Manual, Page: 23 / 86

Probewell Lab Inc.
Page • 22
Summary
The MT-1/WT3 is compatible with meter Forms 1S, 2S, 3S, 4S, 6S (36S, 46S), 8S, 9S,
12S (25S), 14S, 15S and 16S as well as
Fitzall™ meters. Before testing a meter in the
field, always make sure the electrical wiring of the meter base is fully compatible
with those shown in Appendix B.
The MT-1/WT3 socket must first be inserted between the meter base and the meter.
The installation procedure for a ringless meter base is described hereafter in Fig. 3.1.
When powered on, the MT-1/WT3 recognizes the type of meter installed and
validation of the form and the TA is required. With some meters, it is sometimes
necessary to select the form manually.
When a pickup (Optical or Metercam) is used, the socket detects the Kh of the meter
and uses it. If for some reason the Kh suggested does not match the Kh indicated on
the meter, the operator can change it manually by restarting the socket and disabling
Kh autodetection. Without a pickup, the user must manually enter the meter Kh.
The next step is to choose a type of test to perform.
If a pickup is used, the test becomes fully automatic and the test modes
available are
Custom , Quick, Full, Four-Quadrant (WH) and Four-Quadrant
(VARH)* .
Without a pickup, the modes Manual and Tracking are available. In Tracking ,
the test is done manually and the meter disk (or the simulated disk in case of
a solid-state meter) must do a precise number of revolutions. It is up to the
operator to start and stop the test precisely pressing on START/STOP or using
the magnetic switch on the side of the socket.
Once the load is applied and the test has started, the MT-1/WT3 measures the
energy that passes through the meter with its internal electronic standard. All the
important measurements are shown on the mobile device or computer display while
testing.
When the test ends, the test result is displayed in percentage error (Ex. -0.02%) or in
percentage registration (Ex. 99.98%).
*The Four-Quadrant (WH) and the Four-Quadrant (VARH) test are only available for electronic
meters with an optical pulse.