METREL A 1446, User Manual

Page: 9 / 51

Flex current clamps A 1446
9
5 Measuring current with A 1446
I
1
2
Picture 5.1: Wrap the measured cable with the measuring clamp
To use the A 1446 Flexible Current Clamps, follow these instructions:
1. Connect the D01 3 Pin connector of the A 1446 Flexible Current Clamps to the
desired input on the measuring instrument (power meter,..).
2. Select the corresponding sensitivity (.. mV/A) on your instrument.
3. Wrap the flexible measuring head around the conductor to be tested, close coupling
(See Picture 5.1 ).
4. It is very important that the conductor is as the center and perpendicular to the
measuring head. (if it is no possible additional error of 2% of full scale can occur).
5. Do not measure close to other current-carrying conductors if possible. (An external
field of 40 A/m can cause an additional measurement error of 1% of full scale).
6. Make sure that the arrow marked on the clamp coupling points toward the correct
orientation for correct phase. (See Picture 5.1 )
7. Keep the clamp coupling more than 2.5 cm (1 inch) away from the conductor to be
tested and other nearby conductors.
8. Observe the current value and waveform on the instrument’s display. If desired,
select the lower range on the measurement instrument.