Calibration and adjustment
Oxymax COS61D
22
Hauser
6. Is the measured value display on the transmitter stable:
Perform the calibration in accordance with the Operating Instructions for the
transmitter. Pay particular attention to the software settings for the stability criteria
for calibration and for the ambient pressure.
7. Where necessary:
Adjust the sensor by accepting the calibration data.
8. Then place the sensor back into the medium.
9. Deactivate the hold status at the transmitter.
‣
Follow the calibration instructions in the Operating Instructions for the transmitter
used.
7.4
Calculation example for the calibration value
As a check, you can calculate the expected calibration value (transmitter display) as shown
in the following example (salinity is 0).
1. Determine the following:
• Ambient temperature for the sensor (air temperature in the case of the
Air 100% rh
or
Air variable
calibration methods, water temperature in the case of the
H2O air-
saturated
calibration method)
• The altitude above sea level
• The current air pressure (= relative air pressure based on sea level) at the time of
calibration. (If indeterminable, use 1013 hPa.)
2. Determine the following:
• The saturation value S acc. to Table 1
• The altitude factor K acc. to Table 2
Table 1
T
[˚C (˚F)]
S
[mg/l=ppm]
T
[˚C (˚F)]
S
[mg/l=ppm]
T
[˚C (˚F)]
S
[mg/l=ppm]
T
[˚C (˚F)]
S
[mg/l=ppm]
0 (32)
14.64
11 (52)
10.99
21 (70)
8.90
31 (88)
7.42
1 (34)
14.23
12 (54)
10.75
22 (72)
8.73
32 (90)
7.30
2 (36)
13.83
13 (55)
10.51
23 (73)
8.57
33 (91)
7.18
3 (37)
13.45
14 (57)
10.28
24 (75)
8.41
34 (93)
7.06
4 (39)
13.09
15 (59)
10.06
25 (77)
8.25
35 (95)
6.94
5 (41)
12.75
16 (61)
9.85
26 (79)
8.11
36 (97)
6.83
6 (43)
12.42
17 (63)
9.64
27 (81)
7.96
37 (99)
6.72
7 (45)
12.11
18 (64)
9.45
28 (82)
7.82
38 (100)
6.61
8 (46)
11.81
19 (66)
9.26
29 (84)
7.69
39 (102)
6.51
9 (48)
11.53
20 (68)
9.08
30 (86)
7.55
40 (104)
6.41
10 (50)
11.25
Table 2
Altitude
[m (ft)]
K
Altitude
[m (ft)]
K
Altitude
[m (ft)]
K
Altitude
[m (ft)]
K
0 (0)
1.000
550 (1800)
0.938
1050 (3450) 0.885
1550 (5090) 0.834
50 (160)
0.994
600 (1980)
0.932
1100 (3610) 0.879
1600 (5250) 0.830
Summary of Contents for Oxymax COS61D
Page 36: ...Technical data Oxymax COS61D 36 Endress Hauser Interface Memosens protocol...
Page 37: ...Oxymax COS61D Appendices Endress Hauser 37 14 Appendices...
Page 38: ...Appendices Oxymax COS61D 38 Endress Hauser A0044703...
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