HP 410C manual Input Resistance Check DCV, Input Resistance Check DCA

TM 11-6625-1614-15

Section V

Model 410C

Paragraphs 5-12to 5-15

Table

5-2

Table 5-2. DCV Accuracy Test

Model 410C

Voltmeter

Calibrator

Model 410C

Range

Settings

Model

738B

Meter

Readings

Settings

Range

Voltage

. 015V

1. 5-5

.015

.01.47 to .0153 V

. 0 5 V

1. 5-5

.05

.049

to .051

V

. 1 5 V

1. 5-5

.15

.147 to .153 V

. 5 V

1. 5-5

. 5

.49 to .51

V

1 . 5 V

1. 5-5

1.5

1.47

to

l.53

V

5 V

1. 5-5

5

4.9

to

5.l

V

15 V

1. 5-5

15

14.7

to

15.3

V

50 V

1. 5-5

50

49 to 51 V

150V

1.5-5

150

147 to 153 V

500 V

1-3

300

290 to 310 V

1500

1-3

300

270 to 330 V

b. Adjust

Voltmeter

Calibrator to provide a

5-14.

ACCURACY

CHECK

(DCA).

+.015 v

dc

voltage.

a. Figure 5-2describes the test arrangement

c. Model

410C should

read

between

0. 0147 and

required

for

this operation.

The

following

additional

equipment will

also

be

required:

0.0153 v.

DC Power Supply

Model 723A)

d. Readjust Model 410C

and Voltmeter Cali-

DC Voltmeter

Model 3440A/3442A)

brator (,) settings listed in Table 5-2. Note

Model 410C meter readings. If Model 410C fails

10

K,

1%,

1

w

resistor

Part No.

0727-0157)

to meet

pecifications,

refer to Paragraph, 5-30

56

K,

1%,

1

w resistor

Part

No.

0730-0053)

and 5−32

for proper

adjustment

procedure .

10

, 1%, 1

w

resistor

Part

No.

0727-0335)

5-12

INPUT RESISTANCE CHECK (DCV).

56 ,

1%,

1/2

w

resistor

Part

No. 0811-0341)

a. Connect an external resistor, Rx, of lO M

ohms ±1% ( Part No. 0370-0168) in series

b. Connect

the

Model

410C

as shown

in Figure

between the voltmeter calibrator and the DCV

5-2; FUNCTION SELECTOR to +DCA; RANGE

cable of the Model 410C.

to 150 MA.

b. Set Model 410C FUNCTION selector to +DCV;

c. Use 56 ohm resistor for R1 and 10 ohm

RANGE to .015 V.

resistor

for

R2.

c. Adjust voltmeter calibrator for +.015v DC

d. Adjust dc power supply to obtain 1.4v reading

output.

on

system

voltmeter.

d. Model 410C should read .0075

v, verifying

e. Model

410C

should read

between 135.5 and

Rin of 10 M ohms.

144.5 ma.

e. Table 5-3provides settings required to

f. Adjust dc power supply for System voltmeter

verify Model 410C Rin on

RANGES specified.

readings listed in Table 5-4. Note Model 410C

meter readings.

5-15. INPUT RESISTANCE CHECK (DCA).

a. Figure 5-2describes the test arrangement

required

for

this operation.

Replace

R1 and

R2 with a 10 ohm ±1% resistor

Part No.

0727-0335).

b. Set Model 410C FUNCTION SELECTOR to

5-13.

+DCA: RANGE to 150 MA.

5-2 C h a n g e 1 01556-2