HP 410C, Organizational, Ds, Gs, And Depot Maintenance Manual, Page: 36 / 64

TM 11-6625-1614-15
Section V
Paragraphs 5-12 to 5-15
Table 5-2
Model 410C
Table 5-2. DCV Accuracy Test
Model 410C
Range Settings
.015V
. 0 5 V
. 1 5 V
. 5 V
1 . 5 V
5 V
15 V
50 V
150V
500 V
1500
5-12
Voltmeter Calibrator
Model 738B
Settings
Range
1. 5-5
1. 5-5
1. 5-5
1. 5-5
1. 5-5
1. 5-5
1. 5-5
1. 5-5
1.5-5
1-3
1-3
b. Adjust Voltmeter Calibrator to provide a
+.015 v dc voltage.
c. Model 410C should read between 0. 0147 and
0.0153 v.
d. Readjust Model 410C and Voltmeter Cali-
brator (,) settings listed in Table 5-2. Note
Model 410C meter readings. If Model 410C fails
to meet pecifications, refer to Paragraph, 5-30
and
5−32
for proper a d j u s t m e n t p r o c e d u r e .
INPUT RESISTANCE CHECK (DCV).
a. Connect an external resistor, Rx, of lO M
ohms ±1% ( Part No. 0370-0168) in series
between the voltmeter calibrator and the DCV
cable of the Model 410C.
b. Set Model 410C FUNCTION selector to +DCV;
RANGE to .015 V.
c. Adjust voltmeter calibrator for +.015v DC
output.
d. Model 410C should read .0075 v, verifying
R
in
of 10 M ohms.
e. Table 5-3 provides settings required to
verify Model 410C R
in
on RANGES specified.
5-13.
5-2
Voltage
.015
.05
.15
. 5
1.5
5
15
50
150
300
300
Model 410C
Meter Readings
.01.47 to .0153 V
.049 to .051 V
.147 to .153 V
.49 to .51 V
1.47 to l.53 V
4.9 to 5.l V
14.7 to 15.3 V
49 to 51 V
147 to 153 V
290 to 310 V
270 to 330 V
5-14. ACCURACY CHECK (DCA).
a. Figure 5-2 describes the test arrangement
required for this operation. The following
additional equipment will also be required:
DC Power Supply Model 723A)
DC Voltmeter Model 3440A/3442A)
10 K, 1%, 1 w resistor Part No. 0727-0157)
56 K, 1%, 1 w resistor Part No. 0730-0053)
10 , 1%, 1 w resistor Part No. 0727-0335)
56 , 1%, 1/2 w resistor Part No. 0811-0341)
b. Connect the Model 410C as shown in Figure
5-2; FUNCTION SELECTOR to +DCA; RANGE
to 150 MA.
c. Use 56 ohm resistor for R1 and 10 ohm
resistor for R2.
d. Adjust dc power supply to obtain 1.4v reading
on system voltmeter.
e. Model 410C should read between 135.5 and
144.5 ma.
f. Adjust dc power supply for System voltmeter
readings listed in Table 5-4. Note Model 410C
meter readings.
5-15. INPUT RESISTANCE CHECK (DCA).
a. Figure 5-2 describes the test arrangement
required for this operation. R e p l a c e R 1 a n d
R2 with a 10 ohm ±1% resistor Part
No.
0727-0335).
b. Set Model 410C FUNCTION SELECTOR to
+DCA: RANGE to 150 MA.
C h a n g e 1
01556-2