JF-1A Conductivity Sensor
A440-009
Page 22 of 56
FEBRUARY 2009
(Note that the numbers above are examples only; actual values obtained will
vary)
12.0 CALIBRATION CHECK
(Also See A440-010-FC
Manual, at the end of this documents)
Note: Users of this section should be familiar with section 11.0 of this manual, Serial
Commands.
If AIR Reading of ZERO larger than +/- 2pS/M is observed or the user suspects
that the unit is not reading correctly the instructions in A440-010-FC Manual
should be completed.
Note: The sensor is factory calibrated in certified “zero” conductance
fluid. The serial port may read a slightly negative value with the
sensor in air, this is normal due to the difference in dielectric constant
from air to fuel.
12.1 SENSOR REMOVAL
To remove the probe from the fuel load line, please refer to section 9.0.
12.2 POWER SENSOR
Using D-2 Test Cable P/N A440-043 Connect the sensor to a suitable power
supply, and the serial connector to COM 1 of the PC. On the PC run
“Hyperterminal” or other suitable serial port terminal program.
12.2 CLEAN SENSOR
Clean the sensor in “Clean” Isopropyl Alcohol and blow dry using “dry”
compressed air. Note that this step should be repeated until all signs of fuel
residual have been removed from the sensor.
Note: Isopropyl Alcohol is highly conductive and any residual traces
inside the sensor between the two electrodes will overage the
instrument. To flush the Isopropyl Alcohol a reagent grade toluene can
be used as an after rinse and allowed to air dry. Note that if the
Isopropyl Alcohol is well blown off with dry compressed air no