The Model 928A uses two identical input measurement channels
capable of measuring either voltage or current. The dual
inputs allow for voltage to current, voltage to voltage, or
current to current measurements with basic accuracy of 0.1%.
Note: an input CT is required for any current measurement
and the basic accuracy of the Model 928A is affected by the
accuracy of the input CT.
The flexible current inputs are compatible with both voltage
output and current output CTs. Convenient current
transformer calibration tables help eliminate errors
introduced by the CTs and lessen their effect on system
measurements. A special 0 to 40mA range allows for accurate
low level measurements below 10mA.
The Model 928A requires an external CT for current
measurements, such as the Model AP0001300 (1000:1) or the
Model AP0012300 (100:1). Optional accessories include a tilt
/ bail handle, soft carrying case, test leads, external
power supply and other CTs.