HP 3457A Service Manual page 64

3457A Performance Tests
AC Current Performance Tests
1
A
SENSE I N P U T
m
LAST ENTRY
I
Figure 4-4. ACI Performance Test Connections
4-28. AC Current Function
-
Gain Test
4-29. Equipment Required,
300 mA
(* .14O/o)
and
1
A
(*
ing test.
An AC Current Source capable of providing currents of 30 mA
(+
.140/0),
.24%) at a frequency between 100 Hz and 20 KHz is required f o r the follow-
1. Set the AC Current source for an output of 30 rnA at a frequency between 100 Hz and 20 KHz
and connect it to the HP 3457A front panel
I
and
LO
input terminals.
2.
Set the HP 3457A t o the 30 mA range and the number of digits displayed (DIGITS DISP) t o six.
3. Use the Test Record to record the 30 mA, 300 rnA and
1 A full-scale readings.
4. If the full-scale readings are beyond the limits specified in Table
4-6
and on the Test Record, the in-
strument should be calibrated or repaired. Refer t o Section V of this manual f o r calibration
procedures.
5. Reduce the outpirt of the AC Current Source and disconnect it from the HP 3457A input terminals.
3457A
I npu
t
30 m A
300 m A
1
A
3457A
Range
30 m A
300 m A
1 A
3457A
Set
Up
A C
I
A C I
A C
I
Table 4-6. AC Current Test Limits
90
day
L i m i t s
High
30.10300 m A
301.0300 m A
1.005300
A
Low
29.89700 m A
298.9700 m A
0.994700 A