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Operation, Power on/off, Entering serial communication parameters – Vaisala HMT310 User Manual

Page 35: Humidity transmitter hmt310, Chapter 4

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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.