TB 9-4920-454-24
R13
R10
R7
R4
R2
R27
R30
Figure 12. Resistance and installation board.
14. Resistance Check
a. Performance Check
(1) Replace BH-821 adapter with BH-823 adapter in equipment set up in figure 11.
(2) Set FUNCTION SELECT switch to RES and RESISTANCE CHECK switch
to NULL BAL.
(3) Disconnect resistance standard and adjust RESISTANCE & A/C INDICATOR
CHECK meter for 0 indication.
.
(4) Set RESISTANCE & A/C INDICATOR CHECK switch to 22
(5) Reconnect and set resistance standard for 21 . RESISTANCE CHECK meter
pointer will deflect to the left of 0-center, to a point greater than 0.4
indication. Set
resistance standard for 23 . RESISTANCE CHECK meter pointer will deflect to the
right of 0-center, to a point greater than 0.4 indication; if not, perform b (1) and (2) below.
(6) Adjust resistance standard for a 0 indication on RESISTANCE meter. If
resistance standard does not indicate between 21.95 and 22.05 , perform b (3) below.
(7) Repeat (4) and (6) above for 15 . If resistance standard does not indicate
between 14.95 and 15.05 , perform b (4) below.