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APPENDIX 1, Instructions for EMC
General EMC Requirements
In order to ensure the instrument’s capability to fulfil the EMC requirements, no other
components, parts or accessories other than those specifically mentioned in the
instructions or this appendix may be removed, replaced or connected to the instrument.
Devices marked with a CE-label must only be connected to intended transmitter’s.
The enclosure lid must be closed tight to maintain a proper electrical environment.
Connecting Mains Power Supply
All three wires must be connected to the filter if it is to function properly.
L =ElectricPhase
N =Zero
= = Protector Ground
General Instructions for Connecting Cables
Only shielded cables should be connected to the instrument. The cable connection must
provide proper shielding between the sensor cable and the fitting. Please refer to
section ”Connection of Shielded Cable to Fitting”.
Any unused wire apart from the signal wires (please refer to appropriate section in the
Instructions) should be neatly cut level with the cable covering.
Connecting the mA Signal
Only shielded cable, such as 4-wire 0.75 mm
2
equipped with x-shield, may be used. If
the cable shield cannot be properly connected to the enclosure fitting, it may be
connected directly to protector ground. Please observe that connecting the cable shield
directly to protector ground causes the instrument to be more sensitive to
electromagnetic interference (EMI).
Connecting Counter
Only shielded cable may be used.
Cut the shield level with the cable covering at the end connected to the counter. The
unshielded signal wires should be cut as short as possible.
Extending a Shielded Cable
When extending a shielded cable, a special EMC extension box should be used in order
to avoid electromagnetic interference (EMI). Please refer to section ”Extending
Shielded Cable” in
Appendix 4.
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