GF Signet 2350, Руководство по эксплуатации продукта

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5 Signet 2350 Temperature Sensor
The 4 to 20 mA endpoint values are independent of one another and may be adjusted in the fi eld. For example, to reduce the
20 mA endpoint value from the factory setting of 100 °C, but to allow the 4 mA endpoint to remain at 0 °C, perform only the steps
listed below.
NOTE:
The RED wire, which is not connected during normal 4 to 20 mA operation, assumes an important role in the following
procedures.
To adjust the 4 mA endpoint in the fi eld:
• Carefully remove the heat shrink tube protecting the red wire.
• Expose the sensor to the temperature desired to correspond with 4 mA
-10 °C to 100 °C (submersible: -10 °C to 85 °C).
(Be sure to allow suf
fi cient time for the sensor to reach equilibrium.)
• With power applied as described on page 4, connect the RED wire to the WHITE wire for 15 seconds.
(After about 10 seconds the output will drop to 3.6 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the WHITE wire; the 4 mA endpoint has been adjusted.
• NOTE:
The output will act as a switch if the 4 and 20 mA endpoints are set very near to the same value.
To adjust the 20 mA endpoint in the fi eld:
• Expose the sensor to the temperature desired to correspond with 20 mA -10 °C to 100 °C (submersible: -10 °C to 85 °C).
(Be sure to allow suf fi cient time for the sensor to reach equilibrium to this temperature.)
• With power applied as described in on page 4, connect the RED wire to the BLACK wire for 15 seconds.
(After about 10 seconds the output will rise to 22 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the BLACK wire; the 20 mA endpoint has been adjusted.
NOTE
: The output will act as a switch if the 4 and 20 mA endpoints are set very near to the same value.
• Minimum span is ±2% of maximum range.
• 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 0252 Con
fi guration Tool.
To restore the factory setting:
• Disconnect power to the sensor. Wait 10 seconds for circuit to discharge.
• Connect the RED wire to the WHITE wire.
• Apply power as described on page 4, but with the RED wire connected to the WHITE wire for 15 seconds.
(After about 10 seconds the output will drop to 3.6 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the WHITE wire; factory settings have been restored.
Mfr. Part No. Factory Span
3-2350-3 4 to 20 mA = 0 °C to 100 °C
+
-
3-8052
3-8050.521
Loop Input +
4 to 20 mA
loop monitor
Power Supply
DC 12 - 24 V
Black (Loop +)
Optional
Earth Ground
Loop Input -
Shield
White (Loop - )
Red
4 to 20 mA Span Adjustment
WARNING!
Not protecting the red wire may cause the 4 to 20 mA
span to be reset.
Wire Nut