User manual

Performance Veri fication

A621 Instructions

AC Accuracy Check

1. Connect the 100 turn current loop, the mu ltimeter current inputs,

and the signal genera tor output in series, using the patch cords

and adapter. Set the multimeter to display AC

RMS

current. See

Figure 5.

Oscilloscope

Multimeter

Signal

Generator

A621

100 Turn coil

Figure 5: Setup for Maximum Input Current and Accuracy Checks

2. Adjust the signal generator output to between 49 mA

RMS

and

51 mA

RMS

as measured on the multimeter.

3. Connect the A621 to the oscilloscope, and make the following

oscilloscope settings:

H time base to 5 mS / div.

H vertical deflection to 500 mV / div.

H couplingtoDC

4. Set the A621 sensitivity switch to 100 mV / A and center the

trace on the oscilloscope screen.

5. Clamp the A621 around the 100 turn current loop.

6. If necessary, readjust the signal gene rator output to read betwee n

49 mA

RMS

and51mA

RMS

on the multimeter.