Figure 10. Probe control and function switch board.

Calibration Procedure For Exhaust Gas Temperature Tester, Model Bh112Jb Page Navigation
14

TB 9-4920-454-24

(21) If TEMP oC indicator does not indicate between 96 and 104, perform b (1)

and (2) below.

(22) Set TEMPERATURE switch to HEATER PROBE TEMP SET.

(23) Adjust probe control until TEMP oC indicator displays 600.

(24) Set TEMPERATURE switch to OPERATE.

(25) If TEMP oC indicator does not indicate between 596 and 604, perform b (3).

b. Adjustments

(1) Connect multimeter between TP1 (+) and TP2 (-) probe control and function

switch board (fig. 10). If multimeter does not indicate between 7.255 and 7.295 mV dc,

adjust R1 (fig 10) for 7.275 mV dc.

(2) Adjust R5 (fig. 10) for stabilization temperature of 100 oC, with PROBE

POWER lamp flashing.

(3) Adjust R17 (fig. 10) for stabilization temperature of 600 oC, with PROBE

POWER lamp flashing.

NOTE

R5 and R17 interact. Repeat a (19) through (25) above until

specifications are met.

Figure 10. Probe control and function switch board.