Vaisala DMP248, Руководство по эксплуатации

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OPERATING MANUAL _______________________________________________________________
30_____________________________________________________________________M210492
EN
-
A
RX GND TX
X17
F
IGURE
4-6
Location and connections of connector X17.
NOTE Some PC computers can generate interferences to the measured
humidity and temperature values if the transmitter and the PC are
connected to different mains outlets. To minimize the possibility of
these interferences, always use the same main outlet (same phase of
the main electricity) for the PC and the power supply of DMP248. It
is always preferable to use the connector
X6 instead of the connector
X17 because it is more immune to interferences.
Reverting to factory settings of the serial port
If the serial port settings are not known, no commands can be given
via the serial interface. The settings can be reverted to the factory
settings by inserting a jumper in connector X16. The jumper must be
inserted when the power is on!
OPENED COVER OF THE DMP248
X16
F
IGURE
4-7
Forcing the serial port settings back to factory settings.
When the jumper is inserted the serial line factory settings become
valid, but only temporarily.
The transmitter must be given new
settings; otherwise, the transmitter uses the old, unknown settings
after power-up.
When the new settings have been given, the
transmitter must be reset. The jumper must be removed before the
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