Vaisala HMT310 - Manual (Page 35)

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 35
CHAPTER 4
OPERATION
This chapter contains information that is needed to operate the HMT310.
Power Supply
Use a 10 … 35 VDC power supply (required minimum voltage varies
depending on the operating environment, functions and output type). For
instructions on selecting the correct operating voltage, see section Power
Supply Requirements on page 34.
Transmitter Start-Up
When the transmitter is connected to a power supply, there is a delay of
three seconds as the transmitter starts up. After the start-up is complete,
the measurement data is available from the analog output and serial line.
If serial line output is used, note that the transmitter will behave
according to the configured serial mode:
- In STOP mode, the transmitter outputs the transmitter model and
software version. This is the default mode.
- In RUN mode a measurement output starts immediately.
- In POLL mode the transmitter does not output anything after
powerup.
For instructions on configuring the serial mode, see section Set Serial
Interface Mode on page 43.