Summary - Probewell MT-1/WT3 User Manual

Probewell Lab Inc.

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™. Before testing a meter in the field,
always make sure the meter base's electrical wiring is fully compatible with that
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
validates of the form and the TA 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 meters's Kh and
uses it. If for some reason the suggested Kh does not match the Kh indicated on the
meter, the operator can change it manually by restarting the socket and disabling
"Kh autodetection". If not using a pickup, the operator must manually enter the
meter's Kh.
The next step is to choose a type of test to perform.
If a pickup is used, testing becomes fully automatic and the available test modes are:
Custom, Quick, Full, Four-Quadrant (Wh) and Four-Quadrant (VARh)*.
If not using a pickup, the available test modes are: Manual and Tracking. In Tracking,
the test is conducted manually and the meter disk (or simulated disk for solid-state
meters) must complete a precise number of revolutions. It is up to the operator to
start and stop the test at the right time by pressing "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 (e.g. -0.02%) or
in percentage registration (e.g. 99.98%).
*The Four-Quadrant (Wh) and the Four-Quadrant (VARh) test are only available for electronic
meters with an optical pulse.
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