100A 3 PHASE METER TESTER: MODEL 689B

The Model 689B meter tester uses a Digital Signal Processor
and a display processor to measure and calculate meter
errors to 0.03% or 0.1% accuracy.

The Model 689B has a 3 phase switch mode current source.
For testing direct connected meters to 100A there are 6 large
6mm sockets on the front panel. Testing C.T. meters to 10A is
done using the multi pin “CURRENT” socket on the front panel.

The model 3028 clip on C.T. clamps have basic phase and
ratio accuracy of 0.2%, which allows accurate testing of direct
connected polyphase and single phase meters without the
need to disconnect the meter wiring or interrupting supply to the
customer.

Up to 1000 test records can be stored for review or later
downloading to a USB flash drive.
The chassis of the 689B is fitted in a rugged transit case using rubber mounts to protect it against
rough handling in the field. There is a carry handle on top and both ends of the case.