D-2 Incorporated JF-1A User manual

JF-1A CONDUCTIVITY SENSOR
A440-009 Page 1 of 56
FEBRUARY 2009
D-2 INCORPORATED
Jet Fuel 1A Conductivity Sensor
JF-1A
OPERATION MAN AL
REVISION 2.1
FIRMWARE VERSION 2.2
P/N A441-009
This manual covers the operational aspects of the D-2 JF-1A Conductivity Sensor. D-2
continuously strives to meet the full expectations of our customers and e elcome
comments on the structure, content and the ability of this manual to ans er your
questions regarding our product. If you have any suggestions or comments please
contact us at [e-mail]. This document is provided ith the understanding that
future versions of this instrument may have additional commands, and the function of
the commands sho n in this document may vary from the present operation.
Revision History
Revision Des ription Date Approved
2.0 In orporated A440-010-FC, Appli ation Note’s 10-006, 10-007 as standard
elements, remove referen es to JFWIN, hange to Hyperterminal
15DEC10 A Fougere
3.0 Corre t Air/Zero Notations 28MAR11 A Fougere

JF-1A CONDUCTIVITY SENSOR
A440-009 Page 2 of 56
FEBRUARY 2009
TABLE OF CONTENTS
OPERATION MAN AL 1
P/N A440-009 1
1.0 GENERAL 4
2.0 USAGE 5
3.0 FUNCTION 5
4.0 THEORY OF OPERATION 6
5.0 D-2 JF-1A SENSOR 7
6.0 MECHANICAL INSTALLATION 8
7.0 ELECTRICAL INSTALLATION
8.0 TEST PROCEDURE 15
.0 SENSOR REMOVAL 17
10.0 SPECIFICATIONS 17
11.0 SERIAL DATA INTERFACE 18
12.0 CALIBRATION 23
13.0 COMPENSATED OUTPUT 24
14.0 FILTERED OUTPUT 25
15.0 MAINTENANCE 27
16.0 OPTIONAL 2-WIRE TEMPERATURE INTERFACE 28

JF-1A CONDUCTIVITY SENSOR
A440-009 Page 3 of 56
FEBRUARY 2009
Appendix A: Service & Warranty Policy 30

JF-1A CONDUCTIVITY SENSOR
A440-009 Page 4 of 56
FEBRUARY 2009
1.0 GENERAL
The D-2 JF-1A Conductivity Sensor is a reliable instrument for the continuous
measurement of electrical conductivity of fuels. The JF-1A Conductivity Sensor
incorporates innovative electronics Digital Signal Processing (DSP) techniques to
accurately determine the electrical conductivity of fuel products. The instrument ill
measure fuel electrical conductivities bet een 0 and 2000 picosiemens/meter (pS/M),
although it is optimized and normally used in the 0 to 500 pS/M range. The sensor
offers RS-232 data output, or traditional industrial loop compliant 4-20 mA. The 4 -20
mA output can be user programmed to represent a prescribed range of conductivity.
User configurations and instrument calibration terms are stored in internal non-volatile
memory. The D-2 sensor is continuously internally electronically calibrated. Absolute
calibration relies only on the sensor cell constant that is very stable by design. The
conductivity sensor has a built-in temperature sensor. Output from the temperature
sensor is used to fully compensate the conductivity output from variations due to
changes in electrical conductivity as a function of temperature per the ASTM D 2624,
Appendix X2 Standard (Appendix A), (See Also Document “NRC-22648 The Relationship
Bet een Electrical Conductivity and Temperature of Aviation Turbine Fuels Containing
Static Dissipater Additives”. The sensor can be provided ith an optional 2 (4 – 20mA)
ire temperature interface, allo ing remote monitoring of fuel temperature.
Figure 1
Typical Installation Courtesy of Motiva

JF-1A CONDUCTIVITY SENSOR
A440-009 Page 5 of 56
FEBRUARY 2009
2.0 USAGE
Fuel products such as jet aviation and diesel fuels that are transferred at high pumping
rates may develop a static electrical charge due to the very lo conductance of the
fluid. The D-2 JF-1A Conductivity Meter measures the ability of the fuel to dissipate
that charge. The conductivity of aviation fuels is purposely increased using additives
that reduce the ability of the fuel to store static charge. These additives are normally
injected prior to transfer to the load vessel. The D-2 JF-1A Conductivity Sensor has the
ability to monitor the electrical conductivity of fuel continuously, allo ing its use as a
sensing element in an automated additive injection system. The D-2 JF-1A ability to
measure ith high precision continuously at a high sampling rate (1 hertz) allo s for
precision control of additive injection. The industrial standard 4-20 mA sensor allo s for
its use ith industry standard PID Controller/Display units combined ith additive
injector pumps to provide real-time control over addition of conductivity-enhancing
additives during the transfer process. The Digital Signal Processing (DSP) full numerical
compensation of conductivity for fuel temperature allo s the system to be used in
facilities independent of a ide range of ambient temperatures. The D-2 JF-1A provides
consistent results independent of temperature ( hen temperature compensation is
enabled). Optionally a second 2 Wire (4 – 20 mA) temperature output interface is
available.
3.0 FUNCTION
The D-2 JF-1A Conductivity Meter reads conductivity in picosiemens/meter, fuel
temperature in ITS-90 degrees C, and fully compensated Conductivity in picosiemens/
meter per ASTM D 2624, Appendix X2. These measures are equivalent to CU or
Conductivity Units. The sensor can be used in a 2 ire 4-20 mA industrial control loop
or in conjunction ith a serial input device using RS-232 IEEE Standard ASCII Serial
Input Data. Optionally a 2 ire (4-20 mA) temperature interface can be added to allo
remote monitoring of fuel temperature.