Frequency And Duty Cycle Measurement - Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual

Measurements: V/Hz/dB – PQ/

5.1.6 Frequency and Duty Cycle Measurement

Ð Set the rotary switch to MHz or %.
Ð Connect the measurement cables as shown.
Make sure that a current measuring range ("A") has not been acti-
vated when the multimeter is connected for frequency or duty
cycle measurement!
!
Attention!
The applied signal voltage may not exceed 5 V.
Frequency Measurement, MHz
A 5 V signal with a frequency of up to 1 MHz is measured and dis-
played using MHz as a unit of measure. The pulse frequency is the
reciprocal value of the pulse period.
Duty Cycle Measurement t /t
E P
The ratio of pulse duration to pulse period is measured with
periodic square-cycle signals and is displayed as a percentage.
Pulse duration (t
Duty cycle (%) =
Pulse period (t
Note
The applied frequency must remain constant during duty
cycle measurement.
38
– MHz/% – /nS/R
– /
SL
)
 100
E
)
P
– Temp – /m – W/Wh – A/Hz/thd
MHz
%
U
t
t
E
t
P
Pulse Time Quantities
f pulse frequency = 1/t
P
t pulse duration
E
t pulse period
P
t – t interpulse period
P E
t /t pulse or duty cycle
E P

V
Temp
MHz
1.0323
kHz
FUNC
ENTER
002.00
t
%
Measuring ranges:
fp pulse frequency range
P
Hz
15 Hz ... 1 kHz 2 ... 98 %
... 10 kHz 5 ... 95 %
... 50 kHz 10 ... 90 %
COM
!
max. 5 V
GMC-I Messtechnik GmbH
f
P
%
/t
E P
t /t
E P