TB 9-6625-1185-24
(6) Release TEST VOLTAGE switch.
(7) Turn TI MULTIPLIER switch to X1.
(8) Using appropriate leads connect resistance standard no .2 to TI terminals as
listed in (a) through (d) below:
High to TI RX + (plus).
(a)
Low to TI RX - (minus).
(b)
GND to TI GUARD.
(c)
TI GND terminal to earth ground.
(d)
NOTE
DO NOT REMOVE EARTH GROUND
FROM
TI
THROUGHOUT ENTIRE PROCEDURE.
NOTE
Disconnect strap on resistance standard.
(9) Adjust TI ZERO ADJ (∞ ADJ) for ∞ (INFINITY) indication on TI
MEGOHMS meter.
(11) Press and hold TEST VOLTAGE switch and adjust DC ADJUST control until
VOLTS meter indicates 0.5 on upper (MULTIPLY MEGOHMS BY) scale.
(12) Readjust resistance standard until TI MEGOHMS meter indicates 1.
(13) Repeat (11) and (12) above until TI VOLTS meter indicates 0.5 and
MEGOHMS meter indicates 1.
(14) Release TEST VOLTAGE switch.
(15) Resistance standard will indicate between 475,000 and 525,000 ohms.
(16) Repeat technique of (10) through (14) above at values listed in table 4.
Resistance standard will indicate within limits specified.
Resistance standard
Test instrument
final indication
Resistance
(Ohms)
standard
TEST
MEGOHMS
setting
VOLTAGE
VOLTS meter
meter
(ohms)
Min
Max
MULTIPLIER
indication
indication
switch 1620D only
100K1
0.1
0.5
2.0
95K
105K
200K1
0.1
0.5
4.0
190K
210K
400K1
0.1
0.5
8.0
380K
420K
600K
1.0
0.5
1.2
570K
630K
800K
1.0
0.5
1.6
760K
840K
See footnotes at end of table.
6