Honeywell Searchline Excel Technical Handbook page 52

MAN0530 Issue 10 - 11/09 Searchline Excel
2104M0506
3. INSTALLATION AND OPERATION
If there is the possibility that such vibration sources could or are causing unacceptable
movement,
enter a brief description, e.g.
turbine nearby,
below conveyor
excess heat
Check the installation and its surrounds for potential sources of excessive heat. The unit is
specified up to +65
o
C. Potential sources of excessive heat include direct sunlight in hot
climates, flare-stacks, generator/turbine exhausts and steam vents.
Enter a brief description, e.g.
direct sun, Kuwait,
flare-stack 2 metres away
supply voltage
Check that the supply voltage applied to the unit is within the specified 18V to 32V range and
is stable. Enter the supply voltage and stability, e.g.
22.5v, stable,
19V, ±2V fluctuation
earthing
Inspect the earth connections to the units. If the unit is connected to local metalwork or the
safety/general use earth, enter 'Local Safety. If the unit has been isolated from local
metalwork/ earths and is connected to a clean, instrument earth, enter Instrument earth.
(See section 3.3, Electrical Connections).
rfi/emC
Assess the installation, cabling and its close surrounds for known/potential sources of
excessive RF/Electromagnetic Interference. Such sources could include radio/radar
transmission antennae, high voltage switch-gear, large electrical generators/motors etc.
Searchline Excel is extremely immune to RFI/EMI, complying with the most stringent
requirements specified in EN50270. It is therefore more likely that the field cabling will pick
up interference directly on the 4 - 20mA and 0V connections and that this will affect the
reading received at the control room.
Enter brief details of known/potential EMI sources that are within five metres of the gas
detector and/or its cabling. If cable is unscreened or inadequately protected, note concerns.
Examples of the sort of information to enter are:
10m cable, unscreened, radar, 2m from receiver,
Cable routed over 400kW generator
(See section 3.3 Electrical Connections).
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