Checking Validity Of ∆P Transducer (Dpt) - PAC Alcor JFTOT II Manual

3. CHECKING VALIDITY OF
3.1 The calibration of the transducer system is
internal and not normally accessible to the user.
The following procedure can be used to ensure
that the DPT system is within the operational
limits required for the test. DPT systems failing
these criteria should be serviced by a qualified
technician.
3.2 The standardization technique uses a fuel of
known density. Determine the density by
weighing to four decimals a 10.0 ml pipetted
volume of the test fuel. Fill the leveling bottle
with the test fuel. Note the bottle cap has a
hole in its this maintains an open bottle, but
helps minimize spillage if the bottle turns over.
The free end of the line can be inserted into the
hole to prevent draining when not in use.
3.3 Remove the Air Trap glass jar. Place a beaker
under the drip tubes. Cap the spent fuel outlet
port and ∆P2- port (240 only).
JFTOT II Calibration Manual Rev. C
∆
P TRANSDUCER (DPT)
3.4 Perform the test with the heater test section
disconnected. Wear gloves to protect fingers
from fuel.
3.5 Press the POWER switch to turn the JFTOT
ON. The MAIN MENU will be displayed. If
power is already on, return to the MAIN
MENU. Wait at least 20 minutes after switch-
ing on before proceeding to allow for tempera-
ture stabilization and instrument warm-up.
3.6 Press F5 for the MAINTENANCE display.
The temperature and pressure values are
shown as an example. The first line displays
the computer channel number and the com-
puter internal values. The second line displays
the corresponding temperature and pressure
readings.
Channel 1 is the thermocouple temperature
Channel 2 is ∆P1
Channel 3 is ∆P2 (also displayed on 230)
Channel 4 is the system pressure
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