Combined Performance Test And Adjustments; Dcv Test And Adjustments - HP 3456A Operating And Service Manual

Model 3456A
k. Remove the short from the input terminals. This
completes the ACV Adjustments.
5·21. COMBINED PERFORMAICE TEST AID ADJUST·
MElTS.
5·22. The Combined Performance Test and Adjust·
ments are separated into three main areas, DCV, Ohms,
and ACV. The procedures must be followed in the order
they are presented, starting with the DCV Test and Ad­
justments. Also read the general information pertaining
to the Performance Test (excluding the test procedures)
in this Manual's Section IV, if it has not been done. This
information is necessary to do the Performance Test
part of the following Test and Adjustment procedures.
Allow a 1 hour warm·up time for the following tests and
adjustments or inaccuracies may result.
5·23. DCV Tnt and Adjultmentl.
5-24. Refer to Table 5-2 for the DCV Test and Adjust­
ment Limits.
5-25. Equipment Required.
Reference Divider (Fluke Model 750A)
DC Transfer Standard (Fluke Model 7318)
DC Standard (Systron Donner Model MID7)
DC Null Voltmeter (-hp- Model 41 9A)
I., .,
. .."
1
2
3
•
5
•
7
8
•
1 0
1 1
1 2
1 3
, .
1 5
+ 1 000 V OC
, .
1 7
1 .
20
2 1
22
23
2.
2 5
2. 1 0 V DC lo
REF H to V H
andREF l to V l
27
Tlble 5·2. DCV Tnt Ind Adjultmlnt limits .
a.t·u, ,IMII C.fittrltlH
to 345U
Open Self Test
Short Press RESET
Short Set to 6 dig. resolution
Short . 1 V Range
Short 1 V Renge
Short 1 0 V Renge
Short
100 V Range
Short 1 kV Range
+ 1 0 V DC Autorange
+ 1 V DC Autorange
Short . 1 V Range
Math On
. 1 V DC . 1 V
Range
Math On
. . .
Null Math Off
+ 1 00 V DC
100 V Range
1 kV Range
-, V DC 1 0 V Range
- 5 V DC 1 0 V Ranga
- 1 0 V DC 1 0 V Ranga
- 1 0 V DC Int. '" 100
- 1 0 V DC Int. '= 1
- l a V DC Int. "" . 1
· 1 0 V DC Int. ,. .01
- 1 0 V OC
Int. _ 10. Fittar On
- 1 0 V DC
Filter Off. AUlolero Off
Open Press RESET
. . .
. . .
CMR Test
5-26. Test and Adjustment Procedure.
a. Disconnect the 3456A's input terminals from any
external circuitry and press the TEST button. Make sure
the instrument passes its Self-Test (see Paragraph 3-17).
Press the TEST button again.
Be sure the input terminals are open and the
Guard switch is in the " I N" position when
the Self-Test is enabled.
b. Press the 3456A's RESET button and short its
VOLTS input terminals.
Pressing the RESET bullon automatically
sets the 3456A to DCV, Autorange, Internal
Trigger, and,5 Digit Display.
c. Set the 3456A to the 6 Digit mode by storing "6"
into the N DIG DlSP register.
d. Set the 3456A to the 100 mV (100 -3) range. Make
sure the reading is within the limits shown in Table 5-2.
... �
THt
'ot
· . .
. . .
. . .
· . .
·00.0024 ·3 to + 00.0024 ·3
. . .
·.000004 to + .000004
. . .
·0.00002 to + 0.00002
. . .
-00.0003 to + 00.0003
. . .
-000.002 to + 000.002
A O . + 9.99999 to + 1 0.00001
C
+ .999999 to 1 .000001
Null
Null 0
+ 99.9995 -3 to + 1 00.0005 -3
· . .
+ 99.9999 to + 1 00.0001
E
. . .
+ 999.867 to + 1000.133
· . .
·.99997 to - 1 .00003
· . .
-4.99994 to -5.00006
· . .
-9.99990 to · 1 0.000 1 0
· . .
-9.99990 to - 1 0.00010
· . .
-9.99986 to · 1 0.00014
· . .
-9.9991 to - l 0.0009
· . .
-9.992 to · 1 0.008
· . .
-9.99990 to - 1 0.00010
. . .
-9.99989 to - 1 0.000 1 1
· . .
. . .
.99998 to 1 . 00002
. . .
Adjustments
NOTE
NOTE
Li .. it.
. . .
. . .
. . .
. . .
. . .
. . .
s-s