Vaisala PTU200 - Manual (Page 9)

C HAPTER 3___________________________________________________________ G ETTING STARTED
V AISALA __________________________________________________________________________ 5
CHAPTER 3
GETTING STARTED
Mounting
Choose a place, which represents the environment to be measured, and
is as clean as possible. Air should circulate freely around the probe; it
ensures that the sensor head and the ambient air are at the same
temperature.
NOTE For outdoor installation of the PTU200 transmitter, it is
recommended to use a PTU200MIK mounting kit. For further
information, please contact Vaisala or Vaisala distributor.
Please take into a consideration that the pressure fitting supplied with
the transmitter is not a static pressure head and that the transmitter
cannot be used successfully as such in turbulent or high speed static
wind conditions.
NOTE The barometric pressure measurement accuracy quoted for the
PTU200 series digital transmitters does not include any wind or air
conditioning system measurement errors.
Electrical connections
PTU200 series transmitters have as a standard a RS 232C and as an
option a RS485/422 serial interface. Connect the RS 232C serial
interface and a power supply according to the following pin
assignment.
1 2 3 4 5
6 7 8 9
F IGURE 3-1 9-pin female sub D-connector