Vaisala HMT120 User Manual download pdf (Page 39)

Chapter 4 _______________________________________________________________ Service Port

VAISALA ________________________________________________________________________ 37

Set/Show Serial Interface Mode

Use the SMODE command to show or set the serial interface mode. Note

that a separate SAVE command is not needed to store the new serial

interface mode setting.

SMODE [STOP/RUN]<cr>

In STOP mode: outputting only when command is issued, any command

can be used.

In RUN mode: outputting automatically, only command S can be used.

Example:

>smode stop

Output mode : STOP

Configuring Measurement Parameters

Set/Show Environmental Parameters

Use the ENV command to show or set the environmental compensation

values. In HMT120, the humidity measurement can be compensated for

ambient pressure. The value set using ENV command is a permanent

value which will survive a restart.

ENV [x.xxxx]<cr>

where

x.xxxx

Absolute pressure in the measuring environment.

The default is 1.013. The pressure unit is bar.

Example:

>env

Pressure (bar) : 1.013

>env 0.980

Pressure (bar) : 0.98

>save

Saving settings...done

NOTE

You can use the Vaisala

Humidity Calculator to simulate the effect of

pressure change to dewpoint. The Humidity Calculator can be found at:

www.vaisala.com/humiditycalculator

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Vaisala HMT120 User Manual Page 39