This document is the user manual of Vaisala HUMICAP® HMP155 temperature and humidity sensor, which introduces the product features and characteristics and how to use
This manual provides detailed information on the installation, operation, maintenance and calibration of the Vaisala HUMICAP® HMP155 humidity and temperature probe. It includes safety considerations, wiring diagrams, RS‑485 and USB interface setup, and command reference for serial communication.
The document is organized into chapters covering general information, product presentation, installation procedures, functional operation, periodic maintenance, two‑point calibration, a technical data sheet, and an appendix with calculation formulas used by the probe. This manual is written in French.
Send the command "SEND [ADDR]" over the RS‑485 interface.
Use the command "UNIT [M/N]" to select metric or imperial units.
Enter the command "TIME [HH MM $8]" with the desired hour, minute and optional seconds.