Vaisala PTU300 - Manual (Page 109)

Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 107
NMEA Data Format
The PTU300 transmitter can be used in connection with a GPS receiver.
It responds to a GPS input command by outputting a single predefined
NMEA format message or the transmitter serial number.
NOTE The pressure unit has to be set as bar when the NMEA data output
format is used.
The maximum length of FORM is 128 characters.
NOTE Check that the serial bus settings of the transmitter and those of the GPS
receiver are the same. A baud rate less than 9600 is recommended.
Example:
"$PASHS,XDR,P,"1.5_P_",B,"_SN_",C,"_3.2_T_",C,"_SN_",H,"_RH_",P,"_S
N_#r #n
where
"$PASHS,XDR,P," Text field $PASHS,XDR,P, (P transducer type
= pressure)
1.5 Number field
P Pressure
",B," Text field (B transmitter unit = Bar)
SN Transmitter ID (serial number)
",C," Text field (C transducer type = temperature)
3.2 Number field
T Temperature
",C," Text field (C temperature unit = deg. Celcius)
SN Transmitter ID (serial number)
",H," Text field (H transducer type = humidity)
RH Humidity
",P," Text field (P humidity = % relative humidity)
SN Transmitter ID (serial number)
#r #n CR LF
_ space