Delta OHM HD40.2, Manual

Page: 7 / 18

HD402TR
- 7 -
V1.0
3.1 E
LECTRICAL CONNECTIONS
At power on, the alarm LED blinks quickly while the instrument information is displayed.
3.2 C
ONFIGURATION
The instrument can be configured by using the dip switches (for the unit of measurent)
and the buttons (for alarm settings) on the circuit board or via the COM AUX serial 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
A dip switch is OFF when placed down, towards the serial connector. Instead, it is ON if
placed up, towards the DIP SW sign.
The following tables report the unit of measurement corresponding to the dip switches
setting.
Models TR1 and TR2 Models TR3, TR4 and 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 the serial communication is used by the instrument only if
the dip switch 1 is OFF.
In order to modify the settings, proceed as follows: