Measuring Duty - Westfalia 82 04 51 Bedienungsanleitung

Measuring Duty via Current Clamp
1. First remove the measuring cables before measuring via the
current clamp!
2. Set the rotary function switch (13) to the A
respectively to the A~ position.
3. Press the current clamp trigger (4) to open the clamp. Fully
enclose the conductor to be measured with the current clamp.
4. 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.
5. Read the duty cycle value from the display.
Notes:
Do not exceed the maximum input current of 600 A rms AC.
Do not enclose more than one conductor in the clamp during
measuring. Incorrect measurement values may be obtained.
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 1 kHz can be displayed. It is
possible to test frequencies which are higher than 1 kHz, but
the accuracy of the test result cannot be ensured.
Duty Cycle Measurements via Clamp - Accuracy
Range
10 – 95%
Measurement range: 10 – 1 kHz
Input current range: ≥1 A rms AC (higher input current at higher
frequencies)
Max. input current:
Operation
Resolution
0.1 %
600 A rms AC
Accuracy
± 3%
56
range position