USING VOLTAGE AND CURRENT TRANSDUCERS
PM1000+ Power Analyzer User Manual © Voltech 2010 Page 21
3.2. TO CONNECT A SIMPLE CURRENT TRANSFOMER
To use a conventional current transformer (CT) like the Voltech CL series (or any other
transducer with a current output), connect the normal AHI and ALO inputs of the
PM1000+ to the outputs of the current transformer. Follow the manufacturer‟s
instructions for the safe use and installation of the transducer.
Normally the positive or HI output of the transducer will be marked with the point of an
arrow or a „+‟ symbol. Connect this terminal to the AHI input of the PM1000+.
Current Scaling.
A current transformer produces an output current that is proportional to the load current
being measured. For example, the Voltech CL100 produces an output current that is
1/100 of the current being measured.
To measure the correct current on the PM1000+, use the scale function of the analyzer
to scale, or multiply, the CT output current.
For example, the CL100 is a 100:1 CT. When measuring 100A, its output is 1A. To
scale this on the PM1000+, a scale factor of 100 must be entered:
Press ‟MENU‟
Select „Inputs‟ and press
Select „Scaling‟ and press
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