TB 9-6625-2798-50
(11) Push PRESS TO TEST button. Adjust
(2) Remove battery from test instrument.
decade resistor until test instrument
(3) Remove four pan head screws from test
indicates value shown in column 1
instrument face. Remove test instrument
of Table 4-2. Decade resistor settings will
face and circuitry from inner case.
be between MIN and MAX values shown
(4) Connect power supply (A3) to battery
in Table 4-2. Release button. If the
leads using leads (B3 and B4) and jacks
decade resistor does not indicate between
(B5 and B6).
the values shown in Table 4-2 perform b
(5) Energize power supply and adjust output
below.
to 3.0 volts.
(12) Remove test leads and adapters from test
(6) Connect digital voltmeter across R1 on
instrument, decade resistor and resistance
shunt assembly printed circuit board
standard.
shown in Figure 4-3.
b. Adjustments.
(1) Remove four flathead screws from side of
top flange of the test instrument. Remove
test instrument from case.
Table 4-2. Performance Check-Floor And Equipment
(1 Megohm And Greater)
TOTAL RESISTANCE OF DECADE RESISTOR AND RESISTANCE
TEST INSTRUMENT
STANDARD IN OHMS
INDICATION
MINIMUM
MAXIMUM
1 MEG
SEE TABLE 4-1
1,020,000
5 MEG
4,900,000
5,100,000
Figure 4-3. Shunt assembly printed circuit board
6
