TB 9-6625-2263-35
a. Performance Check
(1) Press VDC pushbutton and RANGE ∆ or ∇ pushbutton to select 100 mVDC
range.
(2) Short TI V/Ω INPUT HI and LO. If TI does not indicate between -.010 and +.010
mVDC, perform b(1) through (4) below.
(3) Remove short and connect calibrator OUTPUT HI and LO to TI V/Ω INPUT
HI and LO.
(4) Set calibrator for a 100 mV dc output. If TI does not indicate between 99.979
and 100.021 mVDC, perform b(5) below.
(5) Repeat technique of (1) and (4) above for TI and calibrator settings listed in
table 3. If TI
does not
indicate within limits
specified, perform adjustments listed in
Test instrument
Test instrument
Calibrator
Indications
range settings
output settings
VDC
(VDC)
(V)
Adjustments1
Min
Max
1
1
.99987
1.00013
b(6)
through
b(8)
10
1
.9998
1.0002
b(9)
through
b(20)
10
2
1.9997
2.0003
b(9)
through
b(20)
10
4
3.9995
4.0005
b(9)
through
b(20)
10
8
7.9992
8.0008
b(9)
through
b(20)
10
-
8
-7.9992
-8.0008
b(9)
through
b(20)
10
10
9.9990
10.0010
b(9)
through
b(20)
100
100
99.986
100.014
b(21)
through
b(23)
1000
1000
999.88
1000.12
---
1If
adjustments are made, verify all checks affected by each adjustment.
b. Adjustments
(1) Adjust DC BUFFER C231 SLOW DC (fig. 1) for TI indication between -.001
and +.001 mVDC (R).
(2) Press READING RATE ∆ or ∇ pushbutton to select 10/SEC rate.
(3) Adjust DC BUFFER C225 FAST DC (fig. 1) for TI indication of .000 mVDC
with the + and - signs alternating (R).