Vaisala DMT143 - Manual (Page 20)

USER'S GUIDE ____________________________________________________________________
18 ___________________________________________________________________ M211435EN-E
Alarm LED
The alarm LED at the back of the transmitter provides a visual indication
of the transmitter’s status. The alarm LED functionality is preset at the
factory according to order form. You can configure it as follows:
- You can change the alarm limit using the DM70 hand-held dewpoint
meter. See section Operation with DM70 Hand-Held on page 34.
- You can use the ALARM command on the serial line to change the
alarm limit, enable/disable the dewpoint alarm, or turn on/off the LED
completely. See section Configure the Alarm LED on page 56.
Table 4 Alarm LED States
LED Color Meaning
Not lit Power off or LED functionality disabled.
Green Power on, normal measurement.
Green and blinking Purge or autocalibration in progress, measurement
frozen.
Red Dewpoint above limit.
Red and blinking Transmitter error. See section Error Messages on
page 66.