TB 9-6625-1942-24
(a) FUNCTION switch to TEST.
(b) RANGE switch to 4.
(c) RATIO switch to EXT REF 10V.
(2) Short TI EXT REF HIGH and LOW terminals together.
(3) Connect calibrator to TI INPUT terminals and set output to +10 V dc. TI will
indicate 0 0.0001 V.
(4) Reverse polarity of calibrator output. TI will indicate 0 0.0001 V.
(5) If (3) and (4) above are not within specified limits, perform b (1) below.
(6) Set RATIO switch to EXT REF 1V and repeat (3) and (4) above. If TI does not
indicate within specified limits, perform b (2) below, as necessary.
(7) Remove short from TI EXT REF terminals and connect calibrator to
EXT REF terminals.
(8) Set calibrator to 1 M .
(9) Connect calibrator to TI INPUT terminals, and adjust output for a positive and
then negative 10 V to TI. If TI does not indicate 0 0.0005 V, perform b (4) below.
(10) Remove calibrator from TI and position controls as listed in (a) through (c) below:
(a) RATIO switch to INT REF.
(b) FUNCTION switch to DC.
(c) RANGE switch to 10V.
(11) Connect equipment as shown in figure 2.
Figure 2. Dc/dc ratio - equipment setup.
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