GF Signet 2250 Hydrostatic Level Sensor - Manual (Page 7)

7 2250 Hydrostatic Level Sensor
• The 4 to 20 mA span can be set to accommodate any application within the operating range of the sensor.
• The respanning procedure requires that the sensor be subjected to the actual pressure that will represent 4 mA and 20 mA.
• The procedure illustrated here assumes that the application requires that the sensor output is 4 mA when the tank is empty
and 20 mA when the tank is full. To reverse the range, reverse steps 3 and 5.
Respanning the 4 to 20 mA output
+
-
+
-
+
-
+
-
15s
= 4 mA
= 20 mA
+
-
+
-
15s
Programmable
Logic Controller
4-20 mA loop monitor
Chart Recorder
Datalogger
Power Supply
DC 12 - 24 V
White (Loop -)
Red (no connection)
After adjusting the 4 to 20 mA span, protect the red wire by
installing the provided wire nut.
For easier re-spanning use the Signet 0250 USB to Digital (S 3 L)
Configuration/Diagnostic Tool.
Short the RED and BLACK wires together for 15 seconds.
mA should go to 22 mA
Disconnect red wire
Short the RED and WHITE wires together for 15 seconds.
mA should go to 3 to 6 mA
Disconnect red wire
Programmable
Logic Controller
4-20 mA loop monitor
Chart Recorder
Datalogger
Power Supply
DC 12 - 24 V
Black (Loop +)
White (Loop -)
Red (no connection)
Carefully remove the heat shrink tube that is protecting
the red wire.
Programmable
Logic Controller
4-20 mA loop monitor
Chart Recorder
Datalogger
Power Supply
DC 12 - 24 V
Black (Loop +)
White (Loop -)
Red (no connection)
Wire the 4-20 mA Loop and turn the power ON.
Install the sensor.
Fill the tank to the level to be
represented by 20 mA.
Fill tank to the level
represented by 4 mA.
Black (Loop +)
1. 2.
3.
6. 5.
4.
WARNING!
Not protecting the
red wire may cause
the 4 to 20 mA
span to be reset.
Wire Nut