JF-1A Conductivity Sensor
A440-009
Page 24 of 56
FEBRUARY 2009
Table 5 gives the change in conductivity as a function of temperature for several
values of initial conductivity at 22 C.
Table 5
Conductivity (pS/M) as a Function of Temperature (Aviation Fuel Treated with
Stadis 450)
Conductivity
50
150
250
350
450
Temperature
-2
25
74
123
173
222
2
28
83
139
194
250
6
31
94
156
218
281
10
35
105
176
246
316
14
39
118
197
276
355
18
44
133
222
311
400
22
50
150
250
350
450
26
56
169
281
394
506
30
63
190
316
443
570
34
71
214
356
499
641
38
80
240
401
561
721
42
90
270
451
631
811
46
101
304
507
710
913
50
114
342
571
799
1027
The D-2 JF-1A Current Output is base on
Compensated Conductivity
. To
prevent compensation the user must set “MC” to zero (See Serial Command
Section of this manual).
14.0 FILTERED OUTPUT
Boxcar (low pass filter) Average:
The D-2 JF-1A Conductivity Sensor has a user specified filtered output. The
output is box car averaged. The number of box cars can be set from 1 (no
filtering) to 10 (maximum filtering). The box car filter has the numerical
equivalent of a low pass filter. Mathematically the form is:
Filtered Output = 1/n * new r n-1/n * old reading