barfield DC400A - Page 18

61-101-00802.EF1 Revision J Page | 12
(3) Press and hold PRESS TO READ CAP (pF) pushbutton while adjusting CAP SIM
(pF) control knob to obtain a T/S reading of 189.0 pF.
(4) Rotate the TEST FUNCTION switch to IND AMP.
(5) Connect the aircraft battery.
(6) Close the circuit breakers.
(7) Turn the aircraft battery ON / OFF switch ON.
CAUTION: DO NOT TAP BEZEL OF INSTRUMENT TO VIBRATE. TO REMOVE
FRICTION, GENTLY TAP ADJACENT PANEL OR REAR HOUSING
OF INDICATOR BEFORE TAKING READINGS.
(8) Verify that the indicator reads zero lbs.
(9) If reading is not zero, adjust EMP 1/E 1.
(10) If the indicator will not give a zero reading, replace the indicator.
(11) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(12) Set the 200 (pF) / 1000 (pF) switch to 1000 (pF).
(13) Set CAP SIM (pF) 100’s thumbwheel to 2. Set the 10’s thumbwheel to 7.
(14) Push and hold the PRESS TO READ CAP (pF) pushbutton while adjusting CAP SIM
(pF) control knob to obtain a T/S reading of 273 pF.
(15) Release the pushbutton.
(16) Rotate the TEST FUNCTION switch to IND AMP.
(17) Verify the indicator reads 1200 lbs.
(18) If the indicator does not show 1200 lbs, adjust FULL.
(19) If the indicator still does not read 1200 lbs, replace indicator.
(20) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(21) Set the 200 (pF) / 1000 (pF) switch to 200 (pF).
(22) Set the CAP SIM (pF) 100’s thumbwheel to “-”. Set the 10’s thumbwheel as follows:
a. If testing E90, F90, A100 or B100 series aircraft, set 10’s to “3”.
b. If testing C90, C90A / B / GT / GTi / GTx, C99, 200, 250, 300, 350 / 350i, or 360,
set 10’s to “6”.
(23) Push and hold the PRESS TO READ CAP (pF) pushbutton while adjusting CAP SIM
(pF) control knobs and verify as follows:
a. If testing E90, F90, A100 or B100 aircrafts, T/S display shows 31.0 pF.
b. If testing C90, C90A / B / GT / GTi / GTx, C99, 200, 250, 300 , 350 / 350i or 360,
T/S display shows 60.0 pF.
(24) Release pushbutton.
(25) Set the MAIN / TOT-AUX / NAC switch to AUX / NAC.
(26) Rotate TEST FUNCTION switch to IND AMP.
(27) Verify the indicator reads 0 lbs.
(28) If reading is not 0 lbs., adjust the indicator using the EMP 2 / E 2.
(29) If the indicator still does not read 0, replace the indicator.