Cooper Instruments & Systems DFI 250X Digital Weight Indicator User Manual
Page 7
CF 147
3
version 1.1
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Use connection diagrams to wire up load cell, power and auxiliary cables as required.
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Use the drill hole template provided for hole locations.
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Connect Power to indicator and press
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Refer to the Setup section 7.0 for information on configuring and calibrating the instrument.
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To turn instrument Off press and hold
3.2 General Warnings
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Indicator not to be subject to shock, excessive vibration or extremes of temperature (before or after installation).
•
Inputs are protected against electrical interference, but excessive levels of electro-magnetic radiation and RFI
may affect the accuracy and stability.
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The instrument should be installed away from any sources of excessive electrical noise.
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The load cell cable is particularly sensitive to electrical noise and should be located well away from any power
or switching circuits.
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For full EMC or for RFI immunity, termination of cable shields and correct earthing of the instrument is
essential.
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Indicator and load cell cable are sensitive to excessive electrical noise. Install well away from any power or
switching circuits.
3.3 Electrical Safety
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For your protection all electrical hardware must be rated for environmental conditions of use.
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Pluggable equipment must be installed near an easily accessible power socket outlet.
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To avoid the possibility of electric shock or damage to the instrument, always switch off or isolate the
instrument from the power supply before maintenance is carried out.
3.4 Cleaning
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To maintain the instrument, never use harsh abrasive cleaners or solvents. Wipe the instrument with a soft
cloth slightly dampened with warm soapy water.
3.5 Panel Mount Template
Use the panel mount template for drill hole locations. The template indicates positions for the two 4mm mounting
screws through the panel. Also displayed on the template is the position of the rectangular hole that should be cut
to allow for the connection of cables. The drilling template supplied with the indicator allows for front or rear
machining of the panel.
3.6 Cable Connections
All cable connections are made to the rear of the instrument using screwless terminals. Wires must be stripped of
insulation by at least 10mm. To install, depress the orange lever beside the terminal required and push wire into the
hole. Release the lever and pull gently on the wire to ensure it is securely trapped in the terminal. It is not
necessary to tin the ends of the wire with solder or to add crimp ferrules to the wires; however, these techniques
are also compatible with the terminals and may ultimately make for a neater job.
Figure 2: Cable Connections
3.7 DC Power (DC PWR +, DC PWR –)