Vaisala HUMICAP HMT330 SERIES Guía de usuario descargar pdf (Pagina 128)

User's Guide ______________________________________________________________________

128 _________________________________________________________________ M210566EN-H

NOTE

To activate the new interval settings immediately, reset the transmitter.

NOTE

When chemical purge in power-up is enabled, wait about 6 min after

power-up before taking measurements. The output channels are locked

for the first operation minutes to the initial measured values

Sensor Heating

This function is optionally available only in transmitters with

HUMICAP

180C or HUMICAP

180RC sensor. It should be used only

with the warmed probe.

The sensor heating is recommended for the high humidity environments

where even a small temperature differences can cause water to condense

on the sensor. The sensor heating speeds up the recovery of the humidity

sensor from condensation.

Sensor heating starts-up when the relative humidity of the measuring

environment reaches the RH-value set by a user (RH-limit). The user can

define the RH-sensor heating temperature as well as the duration of the

heating.

After the heating cycle the humidity conditions are checked and new

sensor heating is performed if the predefined conditions are reached

again.

NOTE

During the sensor heating the outputs are locked to the values measured

before the heating cycle.

Setting Humidity Sensor Heating

When the HMT330 leaves the factory the sensor heating follows the

factory default values. You can enable/disable the function, change the

RH-limit and define the heating temperature and duration of this

function.

XHEAT

Enables/disables the sensor heating.

XHEAT [xx]

where:

xx = ON / OFF

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Vaisala HUMICAP HMT330 SERIES Guía de usuario Pagina 128