Adjustments; Adjustment Interval; Adjustment Sequence; Introduction - HP 3456A Operating And Service Manual

5·1. INTRODUCTION.
5·2. This section of the manual has the complete adjust­
ment procedure for the Model 3456A. After performing
the adjustment procedure, the instrument should meet
its 24 hour specifications. Included in this section is also
a combined Performance Test and Adjustment Pro­
cedure. This may be used in place of the separate Per­
formance Test and Adjustment procedure.
5·3. EQUIPMENT REQUIRED.
5-4. The test equipment required for each adjustment
procedure is listed at the beginning of each procedure
and also in Table 1-2 and 4-1. If the recommended test
equipment is not available, use substitute equipment
-
....
3461A
'
'ot F.IICtIe,
1
2 A ' . DCV
3 C DCV
4 DCV
0
,
DCV
E
•
F
7 4·W Ohms
G
• 4-W Ohms
9 H 4-W Ohms
1 0 4-W Ohms
I
1 1 4-W Ohms
J
1 2
1 3 K ACV
ACV
L
I .
1 5 M or N ACV
N ACV+DCV
I .
1 7 M ACV
Note: For steps 1 6 and 1 7, do the following:
1 . Note the 3456A's reading after adjusting pot "N".
2. Adjust pot "M" for a minimum reading and than continua adjusting the
pOt until the noted reading in Slep 1 6 is reached.
SECTION V

ADJUSTMENTS

Tlble 5-1. 3458A Adjustments
1.,.1
.... ,Ull
l451A ..... h
1 0 V 1 0 V DC
+ 1 0.00000
+
1 V + 1 V DC + 1 .000000
100mV + . 1 V DC + 1 00.0000 - 3
100 V + 1 00 V OC + 1 00.0000
1 0 kO 1 0 K ohm 10.00000 + 3
l kD 1 K ohm 1000.000
100 kD 100 K ohm 1 00.COOO + 3
1000 kO 1 M ohm 1 000.000 + 3
1 0 MO 1 0 M ohm 1 0.00000 + 6
100 V l V, l kHz 0 1 .000
1 V 1 V, 1 kHz 1 .00000
1000 V 1 V, 1 kHz 001.00
1 V Short
Minimum
1 V Short
See Note
that meets the critical specification as listed in the
tables. A summary of the test equipment's critical
specifications and requirements is given in this Manual's
4-4.
Section IV Paragraph
5·5. A�JUSTMENT INTERVAL.
5-6. The 3456A should be adjusted at a 90 day interval,
after repair, or if it fails the Performance Test.
5·1. ADJUSTMENT SEQUENCE.
5-8. The 3456A Adjustments must be performed in the
order they are presented in the procedure and Table 5-1,
starting with the DCV Adjustment.
....
...
0 '14 Tellra_
f. C u
. 1
. ,
. ,
. ,
. ,
. ,
,
.
. 2
. , 0
. ,
± 3
± .
± 2
± 2
.. r,1 SI1·U, 11f1flM1io
G, 'M •
Reset the 34 S6A. Sello 6 digil.
Connect GUARD to LOW.
Adjustment "A" is coerse; "8"
is fine.
Enable the 3456A's Null Math
feature to correCl the 100 mV
offset.
Set the 3456A to the 4-Wire
Ohms function.
Set the 3456A to the 5 Digit
mode.
Repeet Steps 1 3 , 14, and 1 5
until readings converge.
Rapeet Steps , 6 end
1 7 until
readings converge.
5· 1