HT instruments HT4011 - Manual (Page 10)

HT4011
EN – 9
4.3.2. AC voltage measurement
CAUTION
The maximum input AC voltage is 600V. Do not measure voltages
exceeding the limits given in this manual. Exceeding these limits could
result in electrical shocks to the user and damage to the instrument.
Fig. 3: Use of the clamp for AC voltage measurement
1. Switch on the instrument in any position of selector, near it an AC source and look for
the red LED at the clamp's base (see Fig. 1 – Part 2) to turn on. This indicates that the
instrument has detected the AC source's presence
2. Select the position , , Hz.
3. Insert the red cable into input terminal V

CAPHz%Temp and the black cable into
input terminal COM (Fig. 3).
4. Position the test leads in the desired points of the circuit to be measured. The display
shows the value of voltage.
5. If the symbol “O.L” is displayed, this indicates overload status.
6. To use the HOLD and REL functions, please refer to § 4.2.
CAUTION
 Due to the high input impedance, it may take some time for the
instrument to zero the display.
 The changing value shown on the display with open input terminals is
not to be considered a problem of the instrument and these values
are not added by the instrument while carrying out a real measurement.