OTF 5000/HS/LS-001/2/3/4 Iss 4 June 2012
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1.2.11 POSITIONING
Fit the two spacer brackets to the rear of the cabinet and ensure that nothing will block the vents
on this rear panel. The instrument should be positioned on a level floor so that an unrestricted
air flow through the cooling vents is obtained. This is necessary in order to ensure adequate
ventilation, and can be achieved by leaving a gap of 100mm minimum at the rear of the cabinet.
Ensure that the instrument has been positioned away from direct, hot sunlight and is in a
location completely free from draughts, e.g. fans, air conditioning units, air inlets and air outlets
etc. The instrument is mounted on castors, two of which are lockable, to give easy movement.
1.3
ELECTRICAL
1.3.1 SETTLING
During transit the oil in the compressor will have been subject to movement, so it is important to
let the cryostat settle before switching on. We recommend the instrument is left standing for at
least eight hours, and preferably overnight, before switching on.
Moving the instrument around on its castors, e.g. from one laboratory to another, will not affect
the compressor oil.
1.3.2 ELECTRICAL REQUIREMENTS
The supply cord of the instrument should be connected to any ordinary electrical outlet
(minimum 13 amps for 220/240V), a 13 amp fuse should be incorporated in the line. (minimum
20 amps for 110/115V) Check the voltage stamped on the nameplate, located on the back of
the cabinet, with your supply.
The connections are:
Brown
-
Positive (live)
Blue
-
Negative (neutral)
Yellow/Green
-
Earth (ground)
1.3.3 ELECTRICAL SAFETY
Where earth cables may have to be removed from panels for servicing or repair purposes, care
should be taken to replace them when replacing the panel. Earth points are identified by a
yellow and green striped circular sticker.
Where earth connections are taken through connectors, then the connector must be rated to
take the maximum fault current. The machine should be disconnected before such connectors
are separated for servicing purposes.
This cryostat is fitted with an in line mains filter which may affect portable appliance test results.
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