barfield DC400, Инструкция пользователя

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61-101-00802.EF2 (REV. G) CH. 2
January 7, 2015 Page 31 of 44
(19) Set the CAP SIM (pF) 100’s and the 10’s thumbwheels to the closest
approximation of the required value as per Table 4.
(20) Press and hold PRESS TO READ CAP (pF) pushbutton while
adjusting CAP SIM (pF) control knob to obtain a test set reading
according to Table.4.
(21) Release the pushbutton.
(22) Rotate the TEST FUNCTION switch to ADD CAP.
(23) Verify the indicator reads 1400 lbs. for the UA & UB serial numbers
and 1600 lbs. for the UC and UD serial numbers.
Caution: Do not tap bezel of instrument to vibrate. To remove friction,
gently tap adjacent panel or rear housing of indicator before
taking readings.
(24) Record the exact indicator reading.
(25) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(26) Set the CAP SIM (pF) 100’s and the 10’s thumbwheels to the closest
approximation of the sum of aircraft capacitance from step 4 and
value used from Table 4.
(27) Press and hold PRESS TO READ CAP (pF) pushbutton while
adjusting CAP SIM (pF) control knob to obtain the summed value.
(28) Release the pushbutton.
(29) Rotate the TEST FUNCTION switch to IND AMP.
Caution: Do not tap bezel of instrument to vibrate. To remove friction,
gently tap adjacent panel or rear housing of indicator before
taking readings.
(30) Verify the indicator reads the same as in step 24 ± 40 lbs.
Note: Failure to obtain the correct indication may indicate the
possibility of in-line resistance in the aircraft wiring between
the Indicator and the probes. If this condition is found to
exist, disconnect and clean the wing harness connector with
contact cleaner and gently blow dry. If the condition persists
disconnect and clean the fuel panel connector behind the LH
sidewall below the fuel panel in the same manner. When
cleaning the connectors be sure to include the test sets
connectors.
(31) Set the test set ON / OFF switch to OFF.
(32) For 1900 / 1900C (UA and UB) proceed to step E.(1) to disconnect
the test equipment.
(33) Turn the aircraft battery ON / OFF switch OFF.
(34) Open the circuit breakers.
(35) Disconnect the aircraft battery if previously connected.
(36) Connect the test set as shown in either Figure 3 or 4 as applicable.