HMT140 has the ability to initiate a Transmit Attempt based on an alarm, if this functionality is configured in viewLinc.
An alarm can be triggered either when the measured value exceeds a high threshold or goes below a low threshold for a period of time, as configured in viewLinc as HighHigh or LowLow threshold alarm settings. HMT140 can also be configured to initiate a Transmit Attempt when it exits an alarm state. Refer to Vaisala viewLinc User Guide for information about alarm settings.