61-101-00802.EF1 Revision J
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(48) Rotate the TEST FUNCTION switch to IND AMP.
(49) Verify the indicator reads 900 ± 35 lbs.
(50) Set the 28 VDC power supply to OFF.
(51) Set the T/S ON / OFF to OFF.
D. Disconnecting/Reconfiguring
(1) Disconnect 28 VDC power supply.
(2) Disconnect the T/S from the Indicator.
3. ALTERNATE CALIBRATION (WET TANKS)
Note:
The Alternate Calibration should only be used as a temporary measure when draining
facilities are not available. Recalibrate the aircraft using the Preferred Calibration
method at the first opportunity.
Note:
The Alternate Calibration applies the nominal empty tank capacitance value to the
system by the T/S for the indicator zero reading. A second capacitance value, (equal
to the combined value of nominal empty tank plus the equivalent quantity of fuel in the
tanks), is applied to the system. The indicator is then adjusted to show the substituted
fuel quantity.
Note:
Accuracies, close to the Preferred Calibration, may be obtained if the measured dry
capacitance for specific serial number aircraft is known and used instead of EMPTY
values referenced in Table 2 (Tank Capacitance Empty). The ADD FOR FULL values
listed in Table 4 should be added to the known values to obtain the CAP SIM value
for FULL.
A. Test Set Preparation
Note:
Refer to Precautions and Preliminary in General Information section.
(1) Ensure aircraft battery is disconnected.
CAUTION:
WHEN LOWERING OR RAISING THE PILOT FUEL PANEL, ENSURE
THAT THE AIRCRAFT BATTERY IS DISCONNECTED. OBSERVE ALL
SAFETY PRECAUTIONS.
(2) Access the applicable indicator.
(3) Ensure circuit breakers are open.
(4) Ensure aircraft wiring plug at Indicator is disconnected.
B. Connecting Test Set
(1) Ensure T/S switch is OFF.
(2) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(3) Set the INSULATION / SYSTEM switch to SYSTEM.
(4) Set the MAIN / TOT-AUX / NAC switch to MAIN / TOT.
(5) Set the 200 (pF) / 1000 (pF) switch to 200 (pF).
C. Connecting the Test Set
(1) Connect the T/S as depicted in Figure 11 or Figure 12 (whichever is applicable).
