ROTRONIC XB OEM - Manual (Page 11)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 11 of 27
© 2008; Rotronic AG E-M-XB-V1_10
Data recording XB2, XB3 Enabled (loop mode – 10 min. interval)
Automatic humidity sensor test XB2, XB3 Disabled
Humidity sensor drift compensation XB2, XB3 Disabled
Fail safe mode XB2, XB3 Disabled
Simulator mode XB2, XB3 Disabled
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For a detailed description of all AirChip 3000 / XB transmitter main functions see document
E-T-AC3000-DF-V1
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Instructions regarding the configuration of the XB transmitter and access to its functions are provided in
the following manuals:
E-M-HW4v2.2-F2-009
E-M-HW4v2.2-Main (§ 6.5)
E-M-HW4v2.2-DR-001
E-M-HW4v2.2-A2-001
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The factory default setting for dew / frost point calculation is frost point below freezing
5 Mechanical installation
5.1 General guidelines
Relative humidity is extremely dependent on temperature. Proper measurement of relative humidity requires
that the probe and its sensors be at exactly the temperature of the environment to be measured. Because of
this, the location where you choose to install the probe can have a significant effect on the performance of the
instrument. The following guidelines should guarantee good instrument performance:
a) Select a representative location: install the probe where humidity, temperature and pressure
conditions are representative of the environment to be measured.
b) Provide good air movement at the probe: air velocity of at least 200 ft/ minute (1 meter/second)
facilitates adaptation of the probe to changing temperature.
c) Avoid the following: (1) Close proximity of the probe to a heating element, a cooling coil, a cold or
hot wall, direct exposure to sun rays, etc. (2) Close proximity of the probe to a steam injector,
humidifier, direct exposure to precipitation, etc. (3) Unstable pressure conditions resulting from
excessive air turbulence.
d) Immerse as much of the probe as possible in the environment to be measured.