HT instruments М75 - Manual (Page 14)

M72 - M73 - M74 - M75
EN - 12
4.8. A HZ: DC/AC CURRENT AND FREQUENCY MEASUREMENT
Fig. 4: Connection of the instrument’s terminals during A Hz test
1. Turn on the instrument
2. Press the arrow keys to select A Hz
3. Insert the banana connectors of the clamp transducer in the corresponding input
terminals of the instrument (black with black, green or red with green). For
transducers with FRB hypertac connector is necessary the NOCANBA optional
accessory
4. Make sure that the clamp full scale and the instrument full scale do correspond. If they
do not, the measured value will be wrong. To set the clamp full scale refer to § 4.4
5. Open the jaws and insert the cable in the very middle as shown in Fig. 4. Current and
frequency values will be displayed
6. The instrument automatically switches from AC to DC current basing on the signal
applied to terminals
7. Example of DC current displaying. The
minimum limit of DC current is:
1.0mV x transduction ratio of the clamp
lower values are nullified
DC current value