Vaisala Hydromet Data Collection Platform - Manual (Page 76)

User's Guide ______________________________________________________________________
74 __________________________________________________________________ M210933EN-C
Vaisala HUMICAP® Humidity and
Temperature Transmitters HMT330
Series
The HMT330 series is a transmitter product family designed for
different environments. From the QML logger viewpoint, all versions
look identical. The current implementation measures the following
variables:
- Air temperature
- Relative humidity
For more detailed information on the measured parameters, see Vaisala
HUMICAP® Humidity and Temperature Transmitter Series HMT330
User's Guide.
Configuring Humidity and Temperature
Transmitters
The humidity and temperature transmitter is connected to the QML
logger through an RS-232 serial line. There are two alternatives to
connect the transmitter to the logger:
1. RS-232 autosend mode, where the humidity and temperature
transmitter automatically sends measurement data to the QML
logger. Only one HMT transmitter per serial line is allowed.
2. RS-232 polled mode, where only one HMT transmitter per serial
line is allowed.
The default data transmission parameters are the following: 9600 bps, 8
data bits, no parity, and 1 stop bit.
For more information on wiring of the RS-232 options, refer to the
delivery-specific wiring diagrams. For more information on
configuring serial ports, see Vaisala HydroMet™ Data Collection
Platform User’s Guide, Volume 2.