Performance Verification
18
Test 2. AC Current Measurement Accuracy (10 mV/A
range)
8
Set the DMM modes to:
DMM 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Amps
DMM 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Volts
9
Set the Agilent 33120A to:
Waveform: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sine
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Amplitude: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Vpp
Offset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Vdc
10
Measure the current (
I
c
) in the coil on DMM 1 and record in
Table
7
.
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.
11
Measure the voltage output by the probe (
V
PROBE
) on DMM 2 and
record in
Table 7
.
12
Do the calculations specified in
Table 7
to determine if the probe
passes the test.
Table 6
DC Current Measurement Accuracy Record (10 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 * 10 m V/A * 1.04) + V
Z
Calculate Minimum Probe Output Voltage As:
V
PROBEMIN
= (I
C
* 10 * 10 m V/A * 0.96) + V
Z
Probe Passes Test if:
V
PROBEMIN
¢
V
PROBE
¢
V
PROBEMAX
