IM 12D08N04-01E
5-22
5. Parameter Setting
5-3-4. mA output functions
Code 30
*mA
Select 4-20mA or 0-20mA according to associated equipment (recorders, con-
trollers etc.)
Code 31
*OUTP.F
Note: For resistivity measurement, read resistivity in stead of conductivity.
Output mA1 (terminals 61&62)
Conductivity linear
Conductivity with 21 point output table. (The table can be configured to
give an output linear to concentration, see example at the end of this page).
Output mA2 (terminals 65&66)
Conductivity linear
Conductivity with 21 point output table.
Temperature linear
Code 32
*BURN
Diagnostic error messages can signal a problem by sending the output signals
upscale or downscale (22mA or 0/3,5mA). This is called upscale or downscale
burnout, from the analogy with thermocouple failure signalling of a burned-out
or open circuit sensor. In the case of the EXA the diagnostics are extensive and
cover the whole range of possible sensor faults.
Code 35-36 *TABLE The table function allows the configuration of an output curve by 21 steps (in-
tervals of 5%)
The following example shows how the table may be configured to linearise the
output with a W/W% curve. On the next page some other possibilities are
shown.
Code
Output
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
mA
0-20
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
mA
4-20
4
4.8
5.6
6.4
7.2
8
8.8
9.6
10.4
11.2
12
12.8
13.6
14.4
15.2
16
16.8
17.6
18.4
19.2
20.0
% H
2
SO
4
0
1.25
2.5
3.75
5
6.25
7.5
8.75
10
11.25
12.5
13.75
15
16.25
17.5
18.75
20
21.25
22.5
23.75
25
mS/cm
0
60
113
180
211
290
335
383
424
466
515
555
590
625
655
685
718
735
755
775
791
Table 5-3.
Concentration (% by weight)
Conductivity(mS/cm)
Output in %
0 2 4
6 8 10 12 14 16 18 20 22 24
0
200
400
600
800
1000
100
80
60
40
20
0
Conductivity
% Output
Fig. 5-1. Linearisation of output
Example: 0-25% Sulfuric acid
