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Model 3476A
Section V
SECTION
V
MAINTENANCE
5-1. INTRODUCTION.
5-2. This section of the manual contains Performance Tests
and Adjustment Procedures. The Performance Tests are
designed to verify the critical specifications listed in Table
1-1. A Performance Test Card is at the end of this section
for recording the results of the performance tests.
5-5. PERFORMANCE TESTS.
NOTE
5-3. Test Equipment Required.
5-4. Equipment required for the performance tests and
adjustment procedures is listed in Table 5-1, Recommended
Test
Equipment.
Equipment
that satisfies the critical
specifications given in the table may be substituted for a
recommended model.
PERFORMANCE TESTS
Performance tables are included for both 90
day and 1 year calibration cycles. Be sure to use
the appropriate table, depending on the cali-
bration cycle to be used for your instrument.
5-6. DC Voltmeter Accuracy Test.
5-7. A DC Standard is required for this test.
a.
Set the Multimeter to measure dc volts. Short the
input terminals and check for a display of zero ± 1 count.
b. Connect the DC Standard to the VS2 and COM termi-
nals.
c. Check all the ranges listed in Table 5-2 for the toler-
ances indicated. Be sure to test for the appropriate calibra-
tion cycle.
To avoid possible damage to the Multimeter
circuitry, the dc input voltage must not exceed
1000 V dc.
5-8. DC Ammeter Accuracy Test.
5-9. This test requires the use of a Power Supply and a DC
Ammeter.
a.
Connect the equipment as shown in Figure 5-1.
b.
Set the DC Ammeter to the 1000 mA range.
c.
Set the Multimeter function to DC A. Adjust the
Power Supply output for an indication of 900 mA on the
DC Ammeter. The Multimeter should indicate within the
limits listed in Table 5-3.
Table 5-2. DC Voltmeter Accuracy Test.
Range
> DC Standard
Output
Test Limns
90 Day Calibration Cycle
1 Year Calibration Cycle
.11 V
- . 010
V
- . 0097 to - .0103
- .0097 to - . 0103
- . 100
V
- .0995 to - . 1005 .
- .0994 to - . 1006
+ 100
V
+ .0995 to + . 1005
+ .0994 to + . 1006
1.1 V
- 1.00
V
- .996
to - 1.004
- .994
to - 1.006
11 V
- 10.00 V
- 9.96
to - 10.04
- 9.94
to - 10.06
+ 10.00 V
+ 9.96
to + 10.04
+ 9.94
to + 10.06
1100 V
4 1000 V
+ 995
to + 1005
+ 993
to + 1007
5- I
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