HP Car 3490A manual S41.AC/DCRatioAccuracyTest, ExternalReferenceInputResistanceTest

Section V PERFORMANCECHECKS Model34904

b.Connect the battery to IMUT terminals, * to HIGH, - to LOW. Note and record 3490A display.

c.Connect dc standard to EXT REF terminals and set standard output to positive voltage equal to display noted in stepb.

d.SET 490A RATIO switch to EXT REF l0 V. Displayshouldbe + 09.9982to + 10.0018.

e.Reverse polarity of dc standard output. Display shouldbe -09.9982to - 10.0018.

f.Set RATIO switch to INT REF. Reversepolarity ofbattery connectionsNote. and record display.

C.Set RATIO switch to EXT REF 10V. Adjust dc standard output to negative voltage equal to display noted in step f. Dsplay should now be +O9.9982 to

+1 0 . 0 0 1 8 .

h.Reverse polarity of dc standard output. Display shouldbe -O9.9982to - 10.0018.

i.Reduce dc standard output to 1/10 the output usedin steph.

j.Set RATIO switch to EXT REF lV. Display shouldbe -09.9982to - 10.0018.

S41.AC/DCRatioAccuracyTest.

5-42. A dc standard (hp- 7a0B) and an ac calibrator

(hp-7a5A) arerequiredfor this test. r...

a. Set 3490A RATIO switch to EXT REF I V. Connect dc standard to EXT REF terminals and adiust standardoutput to + 0.10000V.

b.Set 3490A FUNCTION to AC, RANGE to I V. Connect ac calibrator to IMUT terminals and adjust calibrator output to l00mV at l00Hz. Display should be 0 . 99865to I . 00135 .

c.Select EXT REF and INPUT rangesand voltages listed in Table 5-8. Display should be as indicated in eachcase.

5-43.ExternalReferenceInputResistanceTest.

544. L dc standardChp- 7a0B) and a l0k9"tO.l% resistor(-hp- 0698a157\ arerequiredfor this test.

a.Set 34904 RATIO switch to EXT REF l0 V. FUNCTION to DC, RANGE to l0 V.

b.Connect3490A. dc standardand l0 k,f) resistoras shownin Figure5-8.Connectjumper acrossresistor.

c.Adjust dc standardoutput to + 10.0000V. Note 34904 display.

d.Removejumper acrossresistor. Display should not change more than 100 counts, verifying an EXT REF input resistanceof ) l0? Q.

5-45GPIB.0PEBATIONALCHECK(0ption030).

546.A GeneralPurposeInterfaceBussystemcontroller and a printer are required to verify the operation of the 3490A Option 030. Two proceduresaregiven.The first, in Paragraph547,is a generalprocedureto be usedwith any bus controller. The second, in Paragraph5-49, is essentially the same procedure written specifically for the 9820A calculator. If the 3490A I/o circuits fail to operate correctly, refer to the GPIB troubleshooting information, Paragraph 749 .

l. Initialize

LEOP - Set End Output [.ow

HEOP - Return End Output to iligh

LREN - Set RemoteEnableLOW

2.Send addresses(see Paragraph 3-104 for 3490A addresscodes)

LMRE Set Multiple ResponseEnableLOW

? (77s) - Universalunlistencommand

6 (668) - 3490A listenaddress(3490A placedin re- mote mode)

HMRE - SetMultiple ResponseEnableHIGH

3. Sendprogramminginstructions

i )

rJTestNo. I

Table5-8. AC/DC Ratio Accurary Test'

Ext Ref	Ext Ref	I nput		lnput	Display Limits
Range	Voltage	Range		Voltage
i V	0.50000v	1	V	0.50000v	0.99865to 1.00135
1 V	1.00000v	1	V	1.00000v	0.99865to 1.00135
1 V	1.20000v	1	V	v	0.83218to 0.8348
				1.00000	09.9865to 10.0135
1 0 v	1.00000v	1 0 v		v
				1.00000	09.9865to 10.0135
1 0 v	5.00000v	1 0 v		5.00000v
1 0 v	10.ooo0 v	1 0 v		10.0000 v	09.9865to 10.0135
1 0 v	12.0000 v	1 0 v		10.0000 v	08.3218to 08.3448

5€