RPM Indicator

TB 9-4920-454-35

(5) Refer to table 3 and adjust calibrator to millivolt value corresponding to ambient

temperature recorded in (1) above.

(6) Multimeter will indicate between 7.255 and 7.295 mV dc; if not, perform b (l)

below.

(7) Replace jumper at TP2 (fig. 4) and reconnect J14 to P14.

(8) Set TEMPERATURE switch to CAL 600 oC. If TEMP oC indicator does not

display 600 perform b (2) below.

b. Adjustments

(1) Adjust R6 (fig. 4) for 7.275 mV dc indication on multimeter (R).

(2) Adjust R3 (fig. 4) for TEMP oC indicator display of 600 (R).

10. % RPM Indicator

a. Performance Check

(1) Set RPM switch to CAL 100% RPM and adjust RPM CAL ADJ control for

100.0 indication on % RPM indicator.

(2) Set RPM switch to N1.

(3) Short pins A and B on RPM INSTRUMENT CABLE receptacle, using test

probe hooks.

(4) If % RPM indicator does not indicate .0 or .1, perform b (l) through (3) below.

(5) Set RPM switch to N2.

(6) Remove shorting connection from pin A, and connect to pin C on RPM INPUT

INSTRUMENT CABLE receptacle.

(7) %RPM indicator will indicate .0 or .1.

(8) Remove short from pins B and C and connect equipment as shown in figure 5.