HT Instruments HT4011 Manual De Instrucciones página 34

5.3. FREQUENCY AND DUTY CYCLE MEASUREMENT
• When measuring frequency with leads, the maximum input AC voltage is
600Vrms. 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.
• When measuring frequency with the clamp, make sure that all the
instrument's input terminals are disconnected.
Fig. 5: Use of the clamp for frequency measurement and duty cycle
1. Select position
2. Press the Hz% key until the symbol "Hz" is displayed for measuring frequency or the
symbol "%" for duty cycle measurement.
3. Insert the red cable into input terminal V
terminal COM for measuring frequency with leads
4. Position the test leads in the desired points of the circuit to be measured. The value of
frequency (Hz) (see Fig. 5 – left part) or of duty cycle (%) (see Fig. 5 – right part) is
shown on the display.
5. If the symbol "O.L" is displayed, this indicates overload status.
6. To use the HOLD function, please refer to § 4.2
CAUTION
CAPHz% and the black cable into input
EN – 10
HT4011