TM 1-1520-238-T-7 Change 5 10–157 10–48. FUEL QUANTITY SYSTEM – CAPACITANCE AND INDICATING TEST (cont) 10–48 (USING TF-579 TEST SET) CAUTION TEST SET MUST BE GROUNDED PRIOR TO CONNECTION TO AIRCRAFT FUEL PROBES UNDER TEST B A UNSH COAX CAP - RES CHECK OFF B - GRD 200 OFF C COMP EXT RES C - GRD A - GRD A - B A - C MEGOMETER MEGOHMS 1 X10 RANGE SELECTOR RANGE SELECTOR X50 X10 X3 X1 CAPACITANCE INDICATOR CAPACITANCE 100 90 80 70 60 50 40 30 20 10 0 115 V 400CPS GROUND OFF 1/2 AMP SPARE COMP UNSH COAX TEST IND COMP 25 - 250 MMF UN SH COMP SET COMP SET PROBE HIGH CAL FUNCTION SELECTOR STANDARD CAPACITOR MMF PROBE MMF PROBE 25 - 250 MMF 5000 600 400 800 OFF 1000 2000 3000 4000 ON X1 ZERO ADJ ZERO ADJ RES EXT X100 X1000 CAL ZERO MIDSCALE ADJ HIGH CAL FUNCTION SELECTOR SWITCH CAP-RES CHECK SWITCH RANGE SELECTOR SWITCH CAPACITANCE INDICATOR ON / OFF POWER SWITCH PROBE 25-250 MMF CONTROL M70-114 MIDSCALE CAL Figure 10–70. Fuel Quantity Test Set Task Result h. On pilot ELEC PWR panel (fig. 10–69), set BATT/EXT PWR switch to EXT PWR. i. On adapter harness (fig. 10–68), set TANK SELECT switch to TANK 1. Set FUNCTION switch to TEST. j. On fuel quantity test set (fig. 10–70), set switches as follows: Switch Position RANGE SELECTOR X1 FUNCTION TANK UNIT SELECTOR TEST/UN SH ON/OFF power ON CAP-RES CHECK CAP