Section
IV
Model
3438A
b.
connect
the 100 kilohm
+
0,01(~, resistor
in
the
K
A
NOTE: Abbreviated Performance Testsare in bold type.
position as shown.
"
.
.
.
Use 746A Output.
DC STANDARD
MULTIMETER
hp
3438A
a@@@Ea
hp
110556
1
3435-
0-
4651
100:l RESISTIVE DIVIDER
R
I
DESCRIPTION
HP
PART
NO.
NOTE
MAX
INPUT
100.6
10
K
+
,0196
WIRE
WOUND
081
1-1185
20
VDC
R4
100.6
*
1%
WIRE
WOUND
0811-1647
20K
I0
K
t
1%
WIRE
WOUND
081
1-3234
Lo
COM
Figure
4-1.
DC Voltmeter Accuracy Test.
a. Set the Multimeter to acV.
b. Connect the AC Calibrator as shown in Figure 4-2.
c. Check the ranges and frequencies listed in
Table4-3
for the tolerances indicated on all ranges through 200 V
(100 V input).
I,'.ye e.u/rrt,ir c,are tt,hm checking /he
/uilott,ing ranges. E.s/ahli.,l~ all c.onnec,/ions
hc</orc turning on /he high ~~olragtp sourc,e.
Cl/l~rn /he 1e.sl.c. are c~ot~ipie~ed, lldrti
(?/I
(he
l~igh ~~ol/age hq/bre di.sc,onnec,/itig atl,~. c.uh1e.s
or
/rs/
leads.
d.
1'0
check the 1200 V range and the 190 V input to
the 200 V range. connect the High Voltage Amplifier to
the
Multimeter and check the tolerances indicated.
4-12.
DC
Ammeter Accuracy Test.
4-13.
1
his test requires the use of a power supply, a DC
Standard and a precision resistor listed in
rable 4-4 (part
numbers are given in
rable 4-1) or a resistor decade box.
a. Connect the Multimeter and test equipment as
shown in Figure
4-3.
Table
Range
rnV
2 V
20 V
ZOO
v
1200 V
Accuracy Test.
Multimeter
Display Limits
19.4
to
20.6
mV
19.6 to 20.4 rnV
19.6 to 20.4 rnV
48.3 to 51.8
rnv
49.0 to 51.1 mV
49.6 to 50.5 mV
98.2 to 101.8 mV
99.4 to 100.6 mV
97.5 to 102.5 rn~
186.9 to 193.2 rnV
.I94 to ,206 mV
362
to
1.939
V
.994 to 1.006 V
1.94 to 2.06 V
1.96 to 2.04
v
1.96
to
2.04
V
1.96
to
2.04
V
4.96 to 5.05
v
4.83 to 5.18 V
18.91
to
19.09
V
18.91
to
19.09
v
18.62
to
19.39
V
19.6 to 20.4
v
19.4 to 100.6 V
186.9
to
193.2
V
196
to
204
V
490 to 51
1 V
994 to 1006 V
4-3.
AC
AC Calibrator
Output
20
mV
20 rnV
20 rnV
50 rnv
50 mV
50 rnV
100 rnV
100 rnV
100 rnv
.19 V
.2 V
1.9
V
1 V
2 V
2
v
2
V
2
V
5 V
5
V
19
V
19
v
19
V
20
v
100 V
*I90
V
*200
V
'500
v
"1000 V
Voltmeter
Test
Frequency
30
Hz
50
Hz
20
HZ
100
HZ
30
Hz
20
kHz
30
Hz
50
Hz
50
kHz
30
Hz
30
Hz
100
kHz
20
kHz
30
Hz
50
HZ
200
Hz
10
kHz
20
kHz
50
kHz
200
Hz
10
HZ
100
kHz
20
HZ
50
HZ
30
Hz
20
kHz
30
HZ
10
HZ
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