Vaisala HUMICAP HMP41, User Manual

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HMI41 AND PROBES
M210316EN-A Operating Manual
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1. THE HMI41 INDICATOR AND PROBES
The HMI41 is an easy-to-use portable humidity and temperature indicator for
a variety of applications, including such as industrial monitoring and
inspections, occupational health and safety, laboratory and research use, spot
checking etc. When equipped with optional calibration cables, the HMI41 can
also be used as a field calibrator for most Vaisala transmitters.
There are six different probe types that can be used with the HMI41 indicator.
The indicator recognizes the probe type automatically, so there is no need to
change settings each time the probe is changed. However, please, note that this
feature is active only in indicators and probes with letters ID in the instrument
label. For previous versions, the probe type has to be set manually. The
HMP44/L is an exception, as indicators marked with ID recognize automati-
cally all versions of this probe. All probe types are optimized for different
applications:
•
HMP41 probe can be used for measuring humidity and temperature in
various applications, for example in spot checks.
•
HMP42 probe head has a diameter of only 4 mm and is 23.5 cm long.
This probe structure is specially indicated for measurements in very
tight places, e.g. in joint spaces between tiles or in air conditioning
channels as well as for measuring the equilibrium humidity of e.g.
timber (separate manual).
•
HMP44 and HMP44L are used for measuring humidity in concrete
and other structures (separate manual).
•
HMP45 probe is indicated for measurements in channels and other
places that are difficult to reach and therefore require a probe head
with cable.
•
HMP46 consists of a 32 cm long probe head of stainless steel; the
HMP46 is optimized for measurements in relatively high temperatures
(up to +100°C, temporarily even +180 °C), in dirty processes and in
general in applications that require a robust probe structure.