HT instruments HT39 - Manual (Page 14)

HT37 - HT39
EN - 13
4.3.4. AC Current Measurement
CAUTION
Maximum input for AC current is 10A. Do not attempt to take any current
measurement exceeding such limit to avoid the risk of electrical shock and
damages to the instrument.
Fig. 6: AC Current measurement
1. Switch OFF the circuit under test.
2. Turn the selector on
∼A.
3. Insert the test leads into the jacks, the red plug into A jack and the black plug into COM
jack (Fig. 6).
4. Connect red and black plugs in series with the circuit under test as indicated in Fig. 6.
5. Power the circuit under test. The current value is displayed.
6. The message "OL" means that the voltage exceeds the measuring limits. In this case
disconnect the test leads from the circuit under test to avoid damaging the instrument
or endanger your own safety.
7. For minimum and maximum value measurement, HOLD function and Peak
measurement please refer to paragraph 4.2.