Endress+Hauser Oxymax W COS51D, Руководство по эксплуатации

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Device description Oxymax W COS51D
18 Hauser
5.3.3 Calibration in air
1. Remove the sensor from the medium.
2. Clean the outside of the sensor with a damp cloth.
Then dry the sensor membrane e.g. by using a tissue.
3. Then wait while the sensor adjusts to the temperature of the ambient air. This takes about 20
minutes. Check that the sensor is not in direct sunlight during this time.
4. If the measured value display on the transmitter is stable, carry out the calibration in
accordance with the Operating Instructions of the transmitter.
5. Place the sensor in the medium again.
!
Note!
Make sure you comply with the instructions for calibration in the Operating Instructions of the
transmitter.
5.3.4 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 ambient temperature for the sensor (air temperature for "air" calibration method,water
temperature for "air-saturated water" calibration type)
– the altitude above sea level
– the current air pressure
L (=rel. air pressure to sea level) at the time of calibration. (If
undeterminable, use 1013 hPa (407 inH
2
O) for an approximate calculation.)
2. Define:
– the saturation value
S acc. to the first table
– the factor K acc. to the second table
° C / °F S
[mg/l=ppm]
° C / °F S
[mg/l=ppm]
° C / °F S
[mg/l=ppm]
° 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
Altitude
[m / ft]
K Altitude
[m / ft]
K Altitude
[m / ft]
K Altitude
[m / ft]
K
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
100 / 330 0.988 650 / 2130 0.927 1150 / 3770 0.874 1650 / 5410 0.825
150 / 490 0.982 700 / 2300 0.922 1200 / 3940 0.869 1700 / 5580 0.820
200 / 660 0.977 750 / 2460 0.916 1250 / 4100 0.864 1750 / 5740 0.815