Performance Tests; Introduction; Test Equipment Required; Dc Voltmeter Accuracy Test - HP 3438A Operating And Service Manual

Model 3438A
SECTION IV
PERFORMANCE TESTS
Section 1V
4-1. INTRODUCTION.
4-9. A D C Standard is required for this test
4-2. This section of the manual explains the a . Set the Multimeter t o d c volts a n d 20 mV range.
Performance Tests used t o verify the specifications listed
in Section 1, Table 1-1. A Performance Test C a r d is a t the b. Allow the Multimeter t o warm u p for 15 minutes.
end of this section for recording the results of these tests.
c. Connect the DC Standard to the VCl and COM
4-3. Test Equipment Required.
terminals as shown in Figure 4- 1.
4-4. Equipment required for the Performance Tests is d . Check all the ranges listed in Table 4-2 for thc toler-
listed in Table 4-1. Equipment that satisfies the critical ances indicated.
specifications given in the table may be substituted for a
recommended model. Test equipment set-ups are shown
for each Performance Test.
Table 4-2. D C Voltmeter Accuracy Test.
4-5. PERFORMANCE TESTS.
4-6. The Performance Tests will be described in the
following sequence:
a.
DC Voltmeter Accuracy Test.
b. A C Voltmeter Accuracy Test.
c. D C Ammeter Accuracy Test.
d. A C Ammeter Accuracy Test.
e. Ohmmeter Accuracy Test.
f. ACV Normal Mode Rejection Test.
g. ACV C o m m o n Mode Rejection Test.
4 - 7 . Abbreviated P e r f o r m a n c e Tests. E a c h
Performance I'est has a n associate tablc that give5 the
Multimeter and test equipment settings. and the
Multimeter display tolerances. W i t h ~ n each tablc, certain
tests arc highlighted by bold type. These tests comprise
the Abbreviated Per-formance lests. The Abbreviated
Performance I'est, should be used t o verify a repair. T h e
complete Perlol.mance Test is used t o certiSy the
Multimctcr performance.
4-8. D C Voltmeter Accuracy Test.
NOTE: Abbreviated Performance Tests are i n b o l d type.
* O n t h e
2 0 0 1nV Range a 100 1
r e s i s t ~ v e dlvlder
I S
used w ~ t h t h e DC Standard o u t p u t voltage to
provlde t h e needed accuracy
Multimeter
Display L i m ~ t s
19.8
t o
20.2 m V
49 8 t o 50.3 m V
-99.7
t o
-100.3 m V
-189.6
t o
-190.4 mV
. I 8 9
t o
, 1 9 1 V
, 4 9 9
t o
-.502 V
,998
t o
1.002 V
1.897
t o
1.903 V
1.89
t o
1.91 V
4.99 t o 5.02 V
-9.98
t o
-10.02 V
*
18.97 t o
+
19.03 V
-18.9
t o
-19.1 V
-49.9 t o -50.2 V
99.8
t o
100.2 V
189.7
t o
190.3 V
-189
t o
-191 V
499 t o 502 V
998 t o 1002 V
Range
"200 m V
2 V
20 V
200 V
1200 V
4-10.
AC Voltmeter Accuracy Test.
DC Standard
O u t p u t
t
1 . 9 V
t
5.0 V
1 0 . 0 V
-19.0 V
-.I9 V
50 V
+
1 . o v
+
1.9V
+ 1 . 9 V
+ 5.0 V
1 0 . 0 V
?
19.0 V
-19.0 V
-50.0 V
+
100.0 V
+ 190.0 V
-190.0 V
+
500.0 V
+
1000.0 V
4-1 1. A n A C Calibrator a n d High Voltage Amplifier will
be required for this test.