Performance Verification
21
Test 5. AC Current Measurement Accuracy (100 mV/A
range)
24
Change the DMM settings to:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Volts
25
Set up the Agilent 33120A settings to:
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Vpp
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Vdc
26
Measure the current in the coil (
I
c
) on DMM 1 and record this in
Table 10 on page 22
.
NOTE
The current in the coil must be
¡
10 mA. Increase the generated amplitude if
necessary to achieve a current of at least 10 mA.
27
Measure the voltage output (
V
PROBE
) by the probe on DMM 2, and
record in
Table 10
.
28
Do the calculations specified in
Table 10
to determine if the probe
passes the test.
Table 9
DC Current Measurement Accuracy Record (100 mV/A range)
Measurement
Recorded Value
Probe Zero Offset Voltage (
V
Z
)
Current in Coil (
I
C
)
Probe Output Voltage (V
PROBE
)
Calculate Maximum Probe Output Voltage As:
V
PROBEMAX
= (I
C
* 10 * 100 mV/A * 1.03) + V
Z
Calculate Minimum Probe Output Voltage As:
V
PROBEMIN
= (I
C
* 10 * 100 mV/A * 0.97) + V
Z
Probe Passes Test if:
V
PROBEMIN
¤
V
PROBE
¤
V
PROBEMAX
