J.P. Instruments Fuel Scan 450 Pilots Guide - Manual (Page 9)

For Your Safe Flight Page 7
Accumulate Total—Trip Total
You may either display total fuel used
 since the last time you informed the FS-450 that the aircraft
was refueled, or
 for an extended trip with multiple fuel stops.
This selection affects only the USD parameter. How to select
whether to accumulate for a extended trip or reset at each refueling
is described in “Pilot Programming” beginning on page 8.
Resetting “USED”
Every time you inform the FS-450 that the aircraft is refueled, the
amount of fuel used is set to zero, unless the instrument is
programmed to accumulate for an extended trip. The display of
fuel used pertains only to the fuel used since the last time you
informed the FS-450 that the aircraft was refueled.
In the manual mode with USD displayed, holding the AUTO
button for three seconds will reset the amount used to 0.
Parameter Indexing
The FS-450 steps through the engine parameters in a specific
sequence. Listed below is the indexing sequence, parameter
description and example of the digital display. The display will
pause at each parameter for a few seconds in the Automatic
indexing mode. In the Manual indexing mode, tap the STEP
button to advance to next parameter. Holding the STEP button
will display the previous parameters in the sequence (rapidly
backwards).