Model34904

 

 

PERFOBMANCECHECKS

 

Section V

 

 

 

Table5-3. AC Voltmeter AccuracY.

 

3490A

 

 

TestSisnal

3490A Max

Test Signal

Other Equipment

Range

voltago

Frequency

DisplayError

Source

Required

1 V

1

V

2QHz

t 400 counts

AC Calibrator

 

1 V

1

V

10 kHz

t

125 counts

 

 

1 V

1

V

100kHz

r

125 counts

 

 

1 0 v

1

V

100 kHz

t

35 counts

 

 

1 0 v

5 V

2OkHz

t

75 counts

 

 

1 0 v

1 0 v

2QHz

t

40Ocounts

 

 

100v

1 0 v

100 Hz

t

35 counts

 

 

100v

100v

50 kHz

t

125counts

 

 

1000v

1000v

1OkHz

t

135counts

 

 

1000v

1 m 0v

100Hz

r

125 counts

 

 

1 V

1

V

25OkHz

*

810 counts

Test Oscillator

1 V Thermal

 

 

 

 

 

 

 

Converter

 

 

 

 

 

 

 

DC Differential

 

 

 

 

 

 

 

Voltmeter

1 0 v

3 V

25OkHz

t

285 counts

Test Oscillator

3 V Thernul

 

 

 

 

 

 

 

Converter

 

 

 

 

 

 

 

DC Differential

 

 

 

 

 

 

 

Voltmeter

Table54.

OhmmeterAccuracy.

39OA Rang

Docade Sotting

Display Limits

.1 ko

100sr

.099983to .100017

l k n

1 k s }

0.99988to 1.00012

10 ks}

10 kn

09.9988to 10.OO12

100ko

100ka

099.988to 1O0.012

1,Oq)ka

l M O

0!X,9.86to 1000.14

10,000ko

10MO

09996.3to 10003.7

with Guard connectedto High. A dc standard(-hp- 7zt0B)isrequiredfor thistest.

a.Connecta I kQ resistorbetweeninput Highand Low terminals,andconnectHighto Guardasshownin Figure5-2.

b.Set3490A FUNCTIONto DC. RANGEto I V. Note3490Adisplay.

DC STANDARO/ DIFFERENTIAL VOLTMETER

hp 74OB

c.Connect dc standard between Higfr terminal and the 3490A chassis.

d.Set dc standard output to + 500.00V. 3490A readingshould not changemore than 0.00005 V, verify- ing dc common-moderejection> 140 dB, where:

ECMR= 20log Peakcommon-modevoltage " Effect on reading(volts)

Table5€. AlternateOhmmeterAccuracyTest.

3490A

Resistor

 

 

 

Display

 

 

 

 

Range

Value

Toleranca

Tolerance

.1 ko

9 0 t o 1 1 0 o

t o.oo25%

t

17

counts

1 k : )

90Oto 1.1 ko

r 0.0025%

t

12

counts

10ko

9 k o t o 1 1 k s l

t

O.OO25%t

12

counts

1OO

9 0 k O t o 1 1 0 k O

r

0.0025%

t

12

counts

ko

90Oko to 1.1 Msl

r 0.005%

 

 

 

1,000ko

*

14

counts

10,000ks)

gMf}to 11MO

r 0 . 01%

I

37 counts

e E o @ o o

5490Ä - a - 29a!

OUTPUTCAELE h o l l O 5 5 B

Figure5-2. DC Gommon-ModeRejeaion Test.

5-3