Vaisala HUMICAP MMT310 Manual de servicio Pagina 28

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HMT310 Humidity and Temperature
Transmitter
Reliable Vaisala
HUMICAP® technology
The HMT310 incorporates the latest-
generation Vaisala HUMICAP® Sensor.
The Vaisala HUMICAP® Sensor is a
capacitive thin- lm polymer sensor.
It features high accuracy, excellent
long-term stability and negligible
hysteresis. It is insensitive to dust,
particulate dirt and most chemicals.
Several outputs, one
connector
The HMT310 is powered up with
12 ... 35 VDC. It has two analog
outputs and an RS-232 serial output.
The output signal and the supply
power travel in the same cable, the
only cable connected to the unit.
The Vaisala HUMICAP
®
Humidity and Temperature Transmitter HMT310 models
(from left to right): HMT313, HMT317, HMT314, HMT318, HMT315 and HMT311.
Chemical purge
Chemical purge helps to maintain
measurement accuracy between
calibraton intervals and it involves
heating the sensor to remove harmful
chemicals. The function can be
initiated manually or programmed to
occur at set intervals.
Optional functions
The following optional functions are
available: several probes for various
applications, calculated humidity
quantities, different mounting kits,
sensor protection options and probe
cable lengths, warmed probe and
sensor heating for high humidity
conditions (HMT317), and chemical
purge for applications risking an
interference with chemicals in the
measuring environment.
Features/Benefi ts
Next-generation Vaisala
HUMICAP® Sensor for excellent
accuracy and stability
Full 0 ... 100 %RH
measurement, temperature
range up to +180 °C
(depending on model)
Small size, easy to integrate
Insensitive to dust and most
chemicals
NIST traceable
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