HT instruments HT78 - Manual (Page 10)

HT78
EN - 9
4.3. HOW TO PERFORM THE MEASUREMENTS
4.3.1. AC Current measurement
CAUTION
Do not perform any AC current measurement on circuit with nominal voltage
higher to 500V to round to avoid possible electrical shocks and to damage
the meter
Fig. 3: Taking AC current measurement
1. Select a measurement range among the 3A, 30A, 300A or 3000A options
2. Move the FILTER selector on ON position to activate the “Low-pass 150Hz filter” (see §
4.2.3)
3. Open the clamp and put the conductor to be tested in the middle of the clamp jaw, then
reading will be displayed
4. For using of Data HOLD and see § 4.2.2. For using of analogical output see § 4.2.6