TB 9-6625-1942-24
8. Dc Volts
a. Performance Check
CAUTION
Always reduce input voltage to TI to minimum before changing
RANGE switch settings.
(1) Connect TI to calibrator.
(2) Set calibrator output for 10 V dc. If TI does not indicate between 09.9985 and
10.0015 V dc, perform b (1) through (13) below.
(3) Reverse leads at TI input and repeat (2) above for a negative indication on TI.
(4) Adjust calibrator output for a 1 V dc.
(5) Set TI RANGE switch to 1V.
If TI does not indicate between 0.99985 and
1.00015 V dc, perform b (14) below.
(6) Repeat technique of (4) and (5) above for settings and indications listed in table 3.
TI will indicate within limits specified.
Table 3. Dc Voltage (0.1 V through 1000 V Ranges)
Test instrument
RANGE
Calibrator
Indications
switch settings
output
(V dc)
(V dc)
(V)
Min
Max
Adjustments
0.1
0.11
0.099982
0.100018
See footnote 1
0.05
0.1
0.049989
0.050011
See footnote 1
0.01
0.1
0.009994
0.010006
See footnote 1
0.5
1
0.49992
0.50008
----
0.1
1
0.09997
0.10003
----
1.0
10
00.9997
01.0003
----
5.0
10
04.9992
05.0008
----
10.0
100
009.997
010.003
----
50.0
100
049.992
050.008
----
b(15) below
100.0
100
099.985
100.015
100.0
1000
0099.97
0100.03
----
500.0
1000
0499.92
0500.08
----
1000.0
1000
0999.85
1000.15
----
1If
TI indications are not within specifications for 0.1 V range, perform 8 a (7) through (11) below.
(7) Disconnect all inputs from TI and short TI INPUT terminals.
(8) Set FUNCTION switch to TEST and RANGE switch to 6.
(9) Record amount and polarity of offset indication on TI.
(10) Remove short and connect calibrator to TI INPUT terminals in reversed polarity
and adjust calibrator output for -10 V dc.
(11) If TI does not indicate between -0999.65 and -1000.35 after algebraically
subtracting the offset recorded in (9) above, perform b (16) below.
