Ohms Test And Adjustment - HP 3456A Operating And Service Manual

Model 34S6A
ee. Uprange the 34S6A to the
the Reference Divider's Output Voltage switch to
1000
V. Check the 34S6A's reading.
ff. Downrange the DC Standard to
downrange the Reference Divider's Input Voltage
switch to 10 V.
gg.
Downrange the Reference Divider's Output
Voltage switch to 1 V and set the 34S6A to the 10 V
range (take out of Autorange).
hh. Reverse the 34S6A's input leads for a - I V
reading. Check the reading.
ii. Set the Reference Divider's Output Voltage switch
to S V. Check the 34S6A's reading.
jj. Turn the DC Standard's Output off and discon­
nect the DC Standard, Transfer Standard, and 34S6A
from the Reference Divider.
kk. Set the Transfer Standard for a 10 V output and
connect it to the 34S6A with the input leads reversed
(" + " output to VOLTS LOW and "-" output to
VOLTS HIGH). Check the reading.
1 1 . Change the Number Of Power Line Cycles In­
tegrated on the 34S6A to 100 by entering a "lOO" into
the N CYC INT register. Check the reading.
mm
Change the Number Of Power Line Cycles In­
.
I ,
tegrated to . 1 , .01 then to 10 by entering " I " , ".1",
".01", and " 10" into the N CYC JNT register, respec­
tively. Check readings.
nn. Turn the 34S6A's Filter "ON" and check the
reading.
Turn the 3456A's Filter and Autozero "OFF".
00.
Check the reading.
pp. Press the RESET button on the 34S6A and con­
nect the Transfer Standard's High Output to the
3456A's RATIO REF HIGH and VOLTS HIGH ter­
minals. Connect the Standard's Low Output to the
34S6A's RATIO REF LOW and VOLTS LOW ter­
minals. Refer to Figure 5-5 for the connection.
qq. Set the 3456A to the DCV IDCV Ration func­
tion. Check the reading.
rr. Disconnect the Transfer Standard from the 3456A
and set the 3456A to the DCV function and 1 V range.
ss. Connect the I K resistor (-hp- Part Number
0698-1021) between the 3456A's VOLTS HIGH and
VOLTS LOW terminals, as shown in Figure 5-6. Make
sure the GUARD terminal is connected to the VOLTS
HIGH terminal (Guard Switch "OUT").
1000
V range. Uprange
+
10 V and then
D I G I TAL V O L T M E T E R
hp
3 4 S 6 A
c: :: :: :: ::J
�
.... -' .... .... .... � �
� �
-' -' -' ....I -' �
�
-' -' -' .... .... -' .... � �
-'
1<5'·5·5
Figure 5·5. Retio Tilt Connection.
tt. Record the 3456A's reading.
uu. With the DC Standard's Output off, connect it
between the 34S6A's chassis and VOLTS HIGH ter­
minal, as shown in Figure 5-6.
vv. Set the DC Standard for a + lOO V output and
turn its output on.
ww. The 3456A's reading
0.()()(x)1O V of the recorded reading in Step tt.
Disconnect the test equipment from the 3456A.
xx.
This completes the DCV Test and Adjustments.
5·27. Ohm. Tilt Ind Adjultment.
5-28. Refer to Table 5-3 for the Ohms Test and Adjust­
ment Limits.
5-29.Equipment Required.
Standard Resistor:
±
(100 ohm .000 5 %; Guildline Model 9330/100)
(I K ohm .000 5 070; Guildline Model 9330/IK)
±
±
(to
K ohm .001 %; Guildline Model 9330/1OK)
±
(100 K ohm .001 %; Guildline Model 9330/100K)
±
( 1 M ohm .002%; Guildline Model 9330/1 M)
±
10 M ohm .01 %; Guildline Model 95206)
Resistor Assembly:
±
(1000 M ohm
03456-67902)
5-30. Test and Adjustment Procedure.
a. Press the 34S6A's RESET button and set the
instrument to the 6 Digit display and 2-Wire Ohms con­
figuration.
b. Short the VOLTS and RATIO REF (4WRO
SENSE) terminals shown in Figure 5-7.
as
c. Check the 3456A's reading.
d. Set the 3456A to the 4-Wire Ohms function.
Check the reading.
Adjustments
DC TRANSFER
STANDARO
F L U K E 7 3 1 B
should be within
.2%; -hp- Part Number
5-7