HP 3457A - 4-16. DC Voltage Function - Gain Test

3457A Performance Tests
DC Voltage Performance Tests Cont’d
3457A | 3457A | 34578 90 day limits 1 year Limits
Input |Range | Set Up High Low High Low
short |300 v | pcv +000.0007 v -000.0007 Vv +000.0007 V -000.0007 v
short | 30 v | ocv + 00.00020 v - 00.00020 v + 00.0020 v - 00.00020 v
Short 3V DcV + 0.000007 v 0.000007 v + 0.000007 Vv - 0.000007 Vv
Short |300 mv] DCV +000.0040 mv -000.0040 mv +000.0040 mv -000.0040 mv
short | 30 mv] ocv + 00.00385 mv 00.00385 mv + 00.00385 my - 00,00385 mv
30 mv| 30 mV} DCV + 30.00505 mv + 29.99495 mv + 30.00520 mv + 29.99480 mV
300 mv} 300 mv} DCV +300.0115 mv +299.9885 mV +300.0145 mv +299.9855 mv
3v] 3v | vev + 3.000058 v + 2.999942 V + 3.000082 v + 2.999918 Vv
2v] 3v | ocv + 2,000041 v + 1.999959 v + 2.000057 v + 1.999943 Vv
lv 3 pDcv + 1,000024 Vv + 0.999976 V + 1.000032 Vv + 0.999968 V
“av 3 DCV 0.999976 V 1.000024 Vv 0.999968 V 1.000032 v
-2v} 3v | oev 1.999959 V - 2.000041 v 1.999943 V 2.000057 v
“3 oe pcv 2.999942 V 3.000058 Vv 2.999918 V 3.000082 V
30 Vv 30 Vv DCV + 30.00125 Vv + 29.99875 V + 30.00140 v + 29.99860 V
300 v |300 v | pcv +300.0157 V +299.9843 V +300.0172 V +299.9828 V
Table 4-1. DC Voltage Test Limits
3. Test the HP 3457A input offset on the 300 V, 30 V, 3 V, 300 mV and 30 mV ranges and record the
reading of each range on the Test Record provided at the end of this section. Begin with the 300 V
range to allow any thermal voltages which might affect the readings on the lower ranges to dissipate.
4. If any of the offset readings are beyond the limits specified on the Test Record, the instrument
should be calibrated or repaired, Refer to Section V of this manual for calibration procedures.
5. Remove the short from the Front Panel Input Terminals.
4-16. DC Voltage Function - Gain Test
4-17. Equipment Required. A DC Voltage Standard capable of providing 30 mV (+ .0055%), 300 mV
(+
.0012%),
1
V,
2V
and
3
V
(+
.0006%),
30
V
(+
.0013%)
and
300
V
(+
.0017%)
is
required
for
this
procedure.
1, Set the output of the DC Voltage Standard to 30 mV and connect it to the HP 3457A front panel
HI and LO Input Terminals. See Figure 4-1.
2.
Use
the
Test
Record
to
record
the
full-scale
readings
for
the
30
mV,
300
mV,
3
V,
30
V
and
300
V
ranges. Begin with the
30 mV
range.
3. If any of the full-scale readings are beyond the specified limits, refer to Section V for calibration
procedures.
4, Reduce the output of the Voltage Standard to 3 volts.
4-3