GHM DeltaOhm HD402 Series, Operating Manual

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HD402…
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V1.1
4.3 C
ONFIGURATION OF THE MODELS WITH RELAY OUTPUT
(HD402TR…)
The instrument can be configured by using the dip switches (for the unit of measure-
ment) and the buttons (for alarm settings) on the circuit board or via the COM AUX se-
rial port. The choice of the configuration mode is done with the dip switch 1:
•
Dip switch 1 = ON

the configuration set through the dip switches 4/5
and the buttons is used
•
Dip switch 1 = OFF

the configuration set via serial port is used
Configuration via dip switches:
The configuration of the dip switches is used by the instrument only if the dip switch 1 is
ON. A dip switch is ON if placed up, towards the DIP SW sign.
The following tables report the unit of measurement corresponding to the dip switches
setting.
TAB. 4.9: selection of the unit of measurement via dip switches
Models TR1 e TR2 Models TR3, TR4 e TR5
Dip switch
number
Unit of
measurement
Dip switch
number
Unit of
measurement
4 5 4 5
OFF ON inchH
2
O OFF ON PSI
ON OFF mmH
2
O ON OFF mmHg
OFF OFF Pa OFF OFF kPa
ON ON mbar ON ON mbar
The dip switches 2, 3 and 6 are not used.
C
ONFIGURATION VIA THE
COM AUX
SERIAL PORT
:
The configuration set with serial communication is used by the instrument only if the
dip switch 1 is OFF.
In order to modify the settings, proceed as follows:
• Connect the COM AUX serial port of the instrument to the RS232 port (via the
RS27 cable) or USB (via the cable CP27) of the PC. If you use the CP27 cable, in-
stall the USB drivers on your PC.
• On the PC, run a serial communication software, set the baud rate to 115200
and the communication parameters to 8N2.
• Send the CAL START command (the command is required to change the config-
uration; to read the value of the parameters, the command is not required).
• Send the commands given in the table below to set or read the instrument pa-
rameters