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CAUTION
• Correct measurements cannot be obtained when the positive and negative thermocouple
leads are connected in reverse.
• Immediately after connecting the thermocouple, the heat balance may be disturbed at
the input terminal section and may cause measurement errors. Therefore, wait about ten
minutes before making a measurement.
• In an environment where the air from the air conditioning is directly applied to the input
terminals or where there are effects from a heat source, the heat balance may be disturbed
at the input terminal section and cause measurement errors.
When making measurements in this type of environment, take preventive measures such
as changing the position.
What to Prepare
Thermocouple or Wiring
Remove approximately 7 mm of the insulation from the ends of the thermocouple or wires.
Electrical wire: 0.14 mm
2
to 1.5 mm
2
recommended (solid wire or thin stranded wire). AWG size:
26-16.
Approx. 7 mm
Flat-blade Screwdriver
Tip size: 0.6 mm (thickness) × 3.5 mm (width)
Screw tightening torque: 0.5 to 0.6 N•m)
Connecting Wires to the Terminal Block
First, turn off the DL850/DL850V. Make sure that the other end of the wire that you are connecting to
the terminal block is not connected to the device under measurement, or make sure that the device
under measurement that you are going to connect to is turned off.
When you first use the 16-CH scanner box, follow the procedure from step 3.
1.
Remove the protection cover screw using a screwdriver.
2.
Pull the protection cover up, and pull it out from the guide hole.
Guide hole
Protection cover screw
3.
Loosen the terminal block screw using a flat-blade screwdriver.
4.
Insert the thermocouple or wire that you prepared into the wire insertion hole.
Insert the thermocouple or wire until its end reaches the back of the wire insertion hole.
5.
Tighten the terminal block screw using a flat-blade screwdriver.
Terminal block
Wire insertion hole
Flat-blade Screwdriver
Wire
6.
Pull lightly on the wire to make sure that it doesn’t come out.
3.14 Connecting Wires to the 16-CH Temperature/Voltage Input Module
3-37
IM DL850-03EN
Making Preparations for Measurements
1
2
3
4
5
6
App
Index