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Emerson Process Management GmbH & Co. OHG3-16
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
3.4 Trace Moisture Measurement
3.4.1 Special Operating Conditions
The sensor is completely calibrated with all
calibration data stored in its ash memory and
does not require recalibration:
• If the sensor is included into a calibra-
tion procedure, it might end up with a
wrong calibration and unusable sensor.
Therefore the analyzer's trace moisture
measurement channel is congured to be
excluded from autocalibration procedures,
by default calibrating all channels. This
exclusion is done by factory setup and
cannot be changed.
• For proper measurement results we re-
commend to exchange the sensor regu-
larly after 12 months of operation.
How does dew point measurement connect
with trace moisture measurement?
The lower the dew point of a gas, the less is
the content of moisture within that gas.
dp / °C Water / ppm
-100 0.025
-98 0.038
-96 0.057
-94 0.084
-92 0.123
-90 0.179
-88 0.258
-86 0.368
-84 0.520
-82 0.729
-80 1.01
-78 1.40
-76 1.91
-74 2.59
-72 3.49
-70 4.68
-68 6.22
-66 8.22
-64 10.8
-62 14.1
-60 18.3
-58 23.5
-56 30.2
-54 38.5
-52 48.9
-50 61.8
-48 77.6
-46 97.1
dp / °C Water / ppm
-44 121
-42 150
-40 185
-38 228
-36 279
-34 340
-32 413
-30 501
-28 604
-26 726
-24 870
-22 1039
-20 1237
-18 1468
-16 1737
-14 2048
-12 2409
-10 2826
-8 3306
-6 3856
-4 4487
-2 5208
0 6030
2 6964
4 8025
6 9226
8 10 583
10 12 113
Tab. 3-6: Dew Points and Water Content (at 1013 hPa)