41
Interface
Data transfer
To receive measurements from the
HDM97
via the USB interface, the following abbreviations must be
sent via the interface. The entire communication takes place in readable ASCII-characters.
Command
Reaction
to
HDM97
of the
HDM97
HDMCMO
activates the data transfer
HDMCMF
deactivates the data transfer
HDMEIH
transmits all units
VAL
transmits the values
Format of the values
Conductivity in S/cm 9 signs
Temperature in °C
7 signs
Pressure in mmHg
9 signs
pH
5 signs only version
BP
Flow in ml/min
5 signs only version
BQ
CR, LF
2 signs
The separation of the values is done by using "/"
Example
Command „hdm“ – HDM97
BP
sends: 0.1234567/123.123/ -12345.12/12.12 + CR LF
Command „HDMEIH“ – HDM97
BP
sends: S/cm,°C,mmHg,pH CR LF