Table of Contents
Section V
PERFORMANCE TESTS
Model 3476A
POWER SUPPLY
hp 6294A
o
6 CO
(
e
iDt
DO
1,254
MULTI METER
hp 3476
DIGITAL MULTIMETER
hp 3465A
JJJJJJJ
3476-B
-
44
Figure 5-1. DC Ammeter Accuracy Test.
Table 5-3. DC Ammeter Accuracy Test.
Range
Current
90 Day
Calibration Limit
1 Year
Calibration Limit
1.1 A
900 rnA
.891 thru . 909
.889 thru .911
5-10. Ohms Accuracy Test.
5-11. A precision resistance decade box will be required for
the following test. It should have an accuracy of .05%.
a.
Set the FUNCTION switch to
ks2
and connect a
short between the
v/s2
terminal and COM. The Multimeter
should indicate zero ± 1 count.
b.
Remove the short and connect the equipment as
shown in Figure 5-2. Use large wire and connect the decade
box as close as possible to the Multimeter. When checking
the 11,000 MI range, connect the COM terminal to a good
earth ground.
c.
Check all ranges listed in Table 54 for the tolerances
indicated. Use the resistance decade box to supply the
standard resistances.
RESISTANCE
DECADE
BOX
MULTIMETER
hp 3476
34 - B-44 r5
Figure 5-2. Ohms Accuracy Test.
5-12. AC Voltage Accuracy Test.
5-13. An AC Calibrator and High Voltage Amplifier will be
required for this test.
To avoid possible damage to the Multimeter
circuitry, the ac input voltage must not exceed
707 V rms.
a.
Set the Multimeter to AC V. Connect the AC Calibra-
tor between the
vs2
and COM terminals. Be sure to con-
nect the Calibrator sense leads.
b. Check the ranges and frequencies listed in Table 5-5
for the tolerances indicated on all ranges through 110 V.
WARNING
1
Use extreme care when checking the following
ranges. Establish all connections before turning
on the high voltage source. When the tests are
completed, turn off the high voltage before dis-
connecting any cables or test leads.
c.
To check the 1100 V range, connect the AC Calibra-
tor and High Voltage Amplifier to the Multimeter and
check the tolerances indicated for the 1100 V range.
Table 5-4. Ohms Accuracy Test.
Range ( kit)
Standard
Resistance
Test Limits Oa»
90 Day Calibration Cycle
1 Year Calibration Cycle
1.1
100 5
.
2
.098
thru . 102
.098
thru . 102
1 kit
.994
thru 1.006
.992
thru 1.008
11
10 kil
9.94
thru 1096
9.92
thru 10.08
110
100 kit
99.6
thru 100.4
99.4
thru 100.6
1100
1000 kit
996
thru 1004
994
thru 1006
11,000
10,000 Idi
9940 thru 10,060 kit
9920 thru 10,080 kit
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