Test 1. Dc Current Measurement Accuracy (10 Mv/A Range) - Agilent Technologies 1146B User Manual

Test 1. DC Current Measurement Accuracy (10 mV/A
range)
1 Configure the instruments as follows:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Volts
Probe's Range Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mV/A
2 Disconnect the probe from the coil and adjust the zero control to
minimize the probe's DC output voltage. Record this zero offset
voltage (V
Z
3
Clamp the probe around the coil.
NOTE
Ensure that the DC current direction in the coil matches the current direction arrow
on the probe. Position the probe as perpendicular as possible to the coil.
4
Set up the Agilent 33120A as follows:
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mVpp (minimum)
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.0 Vdc
5 Measure the current in the coil on DMM 1 and record this value
(I ) in Table 4.
c
The current in the coil must be £ 10 mA. Increase the generator offset if
NOTE
necessary to achieve a current reading of at least 10 mA.
6
Measure the voltage output by the probe on DMM 2 and record
(V ) in
PROBE
7
Do the calculations specified in
passes the test.
) in Table 6 on page
Table 6.
17
Performance Verification
18.
Table 6 to determine if the probe