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SECTION II
Installation
2.1
Introduction
This section contains information and instructions necessary for the
installation and shipping of the model DRC-70/7C/70C Cryogenic Temperature
Indicators and Controllers. Included are initial inspection instructions,
power and grounding requirements, installation information and instructions
for repackaging for shipment.
2.2
Initial Inspection
This instrument was electrically and mechanically inspected prior
to
shipment.
It should be free from mechanical damages, and in perfect working
order upon receipt. To confirm this, the instrument should be inspected
visually for obvious damage upon receipt and tested electrically by use
to
detect any concealed damage. Be sure
to
inventory all components supplied
before discarding any shipping materials.
If there is damage to the instrument
in transit, be sure
to
file appropriate claims with the carrier, and/or
insurance company. Please advise the company of such filings. In case of
parts shortages, please advise the company. The standard Lake Shore Cryotronics
warranty is given on page iv.
2.3
Power Requirements
Before connecting the power cable to the line, ensure that the line
voltage selector switch (115 V or 230 V) is in the appropriate position for
the line voltage to be used. Examine the power line fuse
to
ensure that it
is appropriate for the line voltage.
(115 V, 230 V
=
0.4 Amp)
Nominal
permissible line voltage fluctuation is
±10%
at 50 to 60 Hz.
Caution: Disconnect line cord before inspecting or changing line fuse.
2.4
Grounding Requirements
To protect operating personnel, the National Electrical Manufacturer's
Association (NEMA) recommends, and some local codes require instrument panels
and cabinets
to
be grounded. This instrument is equipped with a three-conductor
power cable which, when plugged into an appropriate receptacle, grounds the
instrument.
2.5
Installation
The DRC-70 Thermometer and DRC-7C/70C Thermometer/Controller are all
solid state and do not generate significant heat.
It may therefore be rack
mounted in close proximity to other equipment in dead air spaces. The heat
from such adjacent equipment should not subject the thermometer to an ambient
temperature in excess of 50°C (122°F).
A s
with any precision instrument, it
should not be subjected to the shock and vibrations which usually accompany
high vacuum pumping systems.
The recommended cable diagrams for the sensor diode and heater element
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