Endress+Hauser Oxymax COS61D, Руководство по эксплуатации

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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