Introduction; Accuracy, Linearity And Dc Output - HP 3400A Operating And Service Manual

Model 3400A
5 -1 . INT RO DUCTION.
5-2. This section contains the information necessary
for maintenance of the Model 3400A
Included are performance checks. adjustment and
calibration procedures, and troubleshooting procedures.
5 -3. T E ST E O UIPM ENT.
5-4. The test equipment required for the maintenance
of the Model 3400A Is listed in Table 5-1.
commended model is not available. use any subsUMe
that meets the required characteristics.
5 - 5 . P E R FO R M A NC E C H ECKS.
5-6. The Performance Checks are in-cabinet tests
that compare the Model 3400A with its given specifi­
cations. These checks may
inspection, periodic maintenance, and for specifica­
tion checks after a repair. A Performance Check
Test Card is provided at the end of this section for
recording the performance of the instrument during
the Performance Checks. The card may
from the manual and used
the incoming inspection or of a routine performance
If
check. the instrument fails to meet any of its
specifications, perform the Adjustment and Cal­
ibration Procedures outlined in Paragraph 5-15.
Table 5-2. Accuracy. Linearity. aod DC Output Check Data
VOLTMETER
CALIBRATOR
OUTPUT (V)
0 . 00 1
0. 003
0. 01
0 . 03
0. 1
0. 3
1 . 0
0. 9
0. 8
0. 7
0. 6
0. 5
0 . 4
0. 3
0. 2
0. 1
3 . 0
10. 0
30. 0
100. 0
300. 0
SECTION
MAINTENANCE
RMS
Voltmeter.
If
the re­
be
used for incoming
be
removed
of
as
a permanent record
3400A
VOLTAGE
RANGE (V)
0. 001
0. 003
0 . 0 1
0 . 03
0. 1
0. 3
1 . 0
1 . 0
1. 0
1 . 0
1 . 0
1 . 0
1 . 0
1 . 0
1 . 0
1 . 0
3. 0
10. 0
30. 0
100. 0
300. 0
V
Allow a 30-minute warmup period before
making performance checks. Duringthe
performance checks, periodically vary
the Model 3400A line voltage
a power line transformer to assure that
the instrument operates correctly at
various ac line voltages.
5-7. ACCURACY. LINEARITY. AND DC OUTPUT
CHECK.
5-B. The accuracy, linearity. and dc output test set­
up is illustrated in Figure 5-1. A Voltmeter Calibrator
-hp- Model 738B and a DC Voltmeter -hp- Model
3440A/3443A) are required for this test.
a. Connect test setup illustrated in Figure 5-1.
b. Set Model 3400A RANGE switch to 0 . 00 1
position.
c. Adjust Voltmeter Calibrator for 0. 001 volt,
rms 400 Hz outputj set the DC Voltmeter to
measure 1 volt.
If
Model 3400A does not indicate within values
d.
listed under "meter reading" in Table 5-2,
perform low frequency calibration procedure.
Paragraph 5-21. Record 3400A readings.
Dc output as indicated on dc voltmeter should
e.
be
within values listed under "3400A DC
output" in Table 5-2.
f. Continue to check accuracy. linearity. and
dc output using Table 5-2.
3400A METER
READING
(V)
0. 000990 to 0 . 00101
0. 00297 to O. 00303
0. 00990 to 0. 0101
0. 0990 to O. 101
0. 0297 to 0. 0303
0. 297 to O. 303
0. 990 to 1 . 01
0. 89 to O . 91
0. 79 to 0. 8 1
0. 69 to 0. 7 1
0. 59 to O . 61
0. 49 to O . 51
0. 39 to O . 4 1
0. 29 to O . 31
0. 19 to O. 2 1
0. 090 to O . 1 1
2. 97 to 3. 03
9. 90 to 10. 10
29. 7 to 30. 3
99. 0 to 101. 0
297. 0 to 303. 0
Section V
±
10% with
3400A DC
OUTPUT
(V)
O. 992 to 1. 008
0. 942 to O. 957
0. 992 to 1. 008
0. 942 to 0. 957
0. 992 to 1. 008
0. 942 to O. 957
0. 992 to 1. 008
0. 892 to O. 908
0. 792 t o O. 808
0. 692 to O. 708
0. 492 to O. 508
0. 592 to O. 608
0. 392 to 0 . 408
O. 292 to O. 308
0. 192 to O. 208
0. 942 to O. 957
0. 092 to O . 108
O. 992 to 1. 008
0. 942 to O. 957
O. 992 to 1. 008
0. 942 to O. 957
5-1