Chapter 4 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 35
CHAPTER 4
OPERATION
This chapter contains information that is needed to operate Humidity
Transmitter HMT310.
Power ON/OFF
Switch on the 24 VDC power supply and the transmitter wakes up.
Entering Serial Communication Parameters
The transmitter communicates via an RS-232 serial interface. The
transmitter can be polled or set on RUN-mode with specific commands.
The data format will be (factory settings):
- 1 start bit
- 7 data bits
- 1 stop bit
- Even parity
- 4800 bits per second, programmable to 19200
- Full duplex
- Serial asynchronous
- Configured as Data Terminal Equipment (DTE)
Enter the communication parameters when using this terminal session for
the first time; save them for future use. See instructions in Table 4 on
page 36.
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