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digital HygroClip probes can be calibrated and adjusted at one
or more points with the HygroPalm 2 or HygroPalm 3 indicator:
• For a quick check of the probe and eventual 1-point
adjustment of humidity and temperature, you can plug a freshly
calibrated probe into any free probe input and adjust against
this probe.
• For scheduled maintenance, you can adjust temperature
at up to 2 points and humidity at up to 4 point against physical
references.
Note: the HygroPalm 1 is limited to a 1-point adjustment of
the probe. The HygroPalm 2 and 3 permit full calibration of
the probe.
You may also make use of the full interchangeability of the
HygroClip digital probes and rotate the probes with a calibration
laboratory. The calibration laboratory can do any of the following:
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- Use
a spare HygroPalm 2 or HygroPalm 3 to directly calibrate
and adjust the probe
- Connect
the probe to an MOK-03-WIN cable and adjust the probe using
a PC
on which the HW3 software has been installed.
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HW3
Software: software based probe calibration is both
simple and precise: there are no hard-to-reach, hard-to-adjust
potentiometers. HW3 offers a high level of flexibility in selecting
the calibration reference, giving the user complete control
over the calibration process. HW3 features the following calibration
modes:
• Humidity: 2, 3 or 4 points
• Temperature: 2 points
• 1-point adjustment function (offset) for both humidity and
temperature
When humidity calibration is done using the Rotronic humidity
standards, HW3 automatically corrects the value of the standard
to reflect the temperature of calibration (see note). HW3 also
offers the possibility of printing a certificate of calibration.
Note: the value of the standards does not depend on barometric
pressure (altitude).
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Certified Humidity Standards: if
you do not have access to a humidity generator, the Rotronic
humidity standards offer a reliable and convenient way to generate
a reference humidity condition during probe calibration. The
Rotronic standards are shipped with an internationally accepted
certificate, meeting in full the requirements of quality systems
such as ISO 9000. The standards are available in boxes of 5
glass ampoules of the same value, and can be stored indefinitely.
Standards in the range of 5 to 95 %RH are non-saturated aqueous
salt solutions. The 0 %RH humidity standard is made of small
granules of a highly porous ceramic. A Material Safety Data
Sheet is available for each standard.
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Calibration Devices: a calibration
device is a small airtight container that fits on the probe
and seals around the humidity sensor. During calibration, a
known reference humidity is produced inside the calibration
device by means of a humidity standard.
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