TB 9-6625-1314-24
(34)
Connect calibrator for negative output and repeat (31) above.
(35)
If required, readjust A2R34 and repeat (30) through (34) above until TI
indicates between 79.99 and 80.01 for both positive and negative outputs of calibrator.
9. Resistance (3444A only)
a. Performance Check
(1) Remove calibrator and short TI input terminals. Set TI RANGE switch to 100
MV (function switch VOLTS). If necessary, adjust front panel ZERO adjustment to obtain
an indication of 00.00 on TI, remove short.
(2) Press INT CHECK 8000 pushbutton and if necessary, adjust INT CHECK
8000 adjustment to obtain an indication of 8000 on TI. Release INT CHECK 8000 pushbutton.
.
(3) Set FUNCTION switch to OHMS and RANGE switch to 1000
(4) Connect the appropriate resistance standard to TI INPUT terminals.
(5) Adjust resistance standard to obtain an indication of 100.0 on TI. If resistance
standard does not indicate between 99.60 and 100.40 ohms, perform b (1) through b (7) below.
(6) Repeat technique of (5) above using RANGE switch settings and indications
listed in table 4. If resistance standard does not indicate within limits specified,
perform b (1) through b (7) below.
Table 4. Resistance
Resistance standard1
Test instrument
indication
RANGE switch
Indication
Min
Max
500.0
1000
498.40
501.60
999.9
1000
996.80
1003.0
9.999
10 K
9.9680
k
10.030
k
99.99
100 K
99.680
k
100.30
k
999.9
1000 K
996.80
k
1003.0
k
1
9.000
10 M
8.9090
M
9.0910
M
Use appropriate resistance standard as required.
b. Adjustments
.
(1) Set RANGE switch to 10 K
(2) Set resistance standard to 10,000 ohms.
(3) Adjust A3R18 (fig. 1) to obtain an average indication of 0.000 (R).
NOTE
0.000 is an indication of 10,000 ohms.
.
(4) Set TI RANGE switch to 10 M
(5) Set resistance standard to 9 megohms.
(6) Adjust A3R7 (fig. 1) to obtain an indication of 9.000 on TI (R).
(7) Repeat a (3) through a (6) above.
