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F-Guard IR3 H2 HD User Manual
Earth/Ground Regime
Any earthing regime employed must avoid earth loops. The following information is provided to
assist with proper earthing of the detector
•
There is an earthing point on the outside of the detector enclosure for connection to
Electrical ground
2.12.1
General recommendations
•
In general, correctly engineered star earthing arrangements minimize earth current
crosstalk and noise, improving the reliability and performance of instrumentation.
•
The use of a single, screened / shielded cable for each field device ensures good
screening / shielding and reduces crosstalk.
Field Cabling
•
The entire length of the field cabling connected to a unit should be screened / shielded.
The screen / shield should be connected to a low noise instrument earth at one end.
•
The screens / shields of field cabling must not be connected in a manner that creates
earth loops or that will result in the screens / shields carrying large currents from heavy
plant or equipment.
•
.
2.12.2
Interference and noise
•
Electrical equipment connected to the system should comply with applicable national or
international EMC standards.
•
Ideally, the 24 V supply reaching units should be free from large transients, fluctuations
or high frequency noise.
•
In order to reduce the likelihood of radio frequency interference affecting the operation
of units it is recommended that neither units nor their cabling are installed in close
proximity to the antennae of high-powered radio, radar or satellite communication
equipment.
3
Configuration options
Some functions of the detector can be configured using an RS-485 modem connected to a computer
with the “
Gastech
communicator” software. For details of how to download the software please
contact technical support on: via email at
These configuration options are listed in the following table along with their factory default
values.
