Measuring Frequency - Westfalia 82 04 51 Bedienungsanleitung

Measuring Frequency 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 Hz/% (11), to switch into
frequency measuring mode.
5. Read the frequency value from the display.
Notes:
Do not enclose more than one conductor in the clamp during
measuring. Incorrect measurement values may be obtained.
Do not exceed the maximum input current of 600 A rms AC.
A frequency range of 10 Hz to 1 kHz can be displayed. If the
measured frequency is lower than 10 Hz, the display shows
"00.0". It is possible to test frequencies which are higher than
1 kHz, but the accuracy of the test result cannot be ensured.
Frequency Measurements via Clamp - Accuracy
Range
660 Hz
1 kHz
> 1 kHz
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 Hz
0.001 Hz
0.001 Hz
600 A rms AC
Accuracy
± (1.5% of reading + 5 digits)
Only to be taken as reference
54
range position