Vaisala DM500 - Manual (Page 87)

Chapter 16 _____________________________________________________ Serial Line Commands
VAISALA _______________________________________________________________________ 85
CHAPTER 16
SERIAL LINE COMMANDS
The DM500 detector is operated via a serial line by using suitable
terminal software like Windows Hyper Terminal (see also MI70-link).
The serial output interface is RS232.Connect the RS232 cable to the
connector on the back panel of the DMI500 user interface unit. The
serial cable can also be connected to the back panel of the DMP501
sensing unit. This port, however, has a limited command set and fixed
format (9600/8/1/none), and connecting to this port may increase the
susceptibility to electromagnetic interference.
The notation '' used in this manual in conjunction with the serial
commands stands for pressing the 'carriage return' (ENTER) key on
your personal computer keyboard.
Serial Commands
Output commands
R*
Continuous output
S* Stopping the continuous output
ADDR Setting the device address
SEND* Outputting one single reading
INTV* Setting the output interval
FORM Defining the output format
Operational commands
START*
Starting the measurement
STOP*
Stopping the measurement
PUMP*
Starting/Stopping the optional sample gas pump
HEAT* Starting/Stopping the optional heater
SALT* Enables/disables the salt contamination detection
SCAL* Starts the salt detection limit determination cycle
PTEST* Starts the cooling capacity test
ANAL* Starting/Stopping the statistical filtering
FFROST* Enables/disables the automatic forced freezing procedure