Westfalia 82 04 51 Instruction Manual page 62

Measuring Duty by V Range
1. Connect the black measuring cable to the COM jack (9) and
the red measuring cable to the input jack (10).
2. Set the rotary function switch (13) to the V
3. Press the frequency/duty switch key (11) as many times until
the icon "%" appears on the right side of the display in order to
activate the duty cycle measuring mode.
4. Connect the measuring tips parallel to the object to be
measured and read the duty cycle value from the display.
Notes:
Do not exceed the maximum input voltage of 600 V rms AC.
If the duty cycle is less than 10%, the symbol "UL" appears on
the display. If the duty cycle is higher than 94.9%, the overload
indicator "OL" appears on the display.
A frequency range of 10 Hz to 10 kHz can be displayed. It is
possible to test frequencies which are higher than 10 kHz, but
the accuracy of the test result cannot be ensured.
Duty Cycle Measurements by V Range - Accuracy
Range
10 – 95%
Measurement range: 10 – 10 kHz
Input current range: ≥0.2 V rms AC (higher input current at
higher frequencies)
Input impedance:
Max. input voltage:
Operation
Resolution
0.1 %
10 MΩ
600 V rms AC
Accuracy
± 3%
57
position.