TA AR-G2, Getting Started Manual

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Page 8 AR-G2/AR 2000ex/AR 1500ex Getting Started Guide
WARNING: Liquid nitrogen can cause rapid suffocation without warning. Store
and use in an area with adequate ventilation. Do not vent liquid nitrogen in con-
fined spaces. Do not enter confined spaces where nitrogen gas may be present
unless the area is well ventilated. The warning above applies to the use of liquid
nitrogen. Oxygen depletion sensors are sometimes utilized where liquid nitro-
gen is in use.
WARNING: The various surfaces and pipes of the ETC and the supply Dewar can
get cold during use. These cold surfaces cause condensation and, in some
cases, frost to build up. This condensation may drip to the floor. Provisions to
keep the floor dry should be made. If any moisture does drip to the floor, be sure
to clean it up promptly to prevent a slipping hazard.
WARNING: Always unplug the instrument before performing any maintenance.
WARNING: No user serviceable parts are contained in the rheometer. Mainte-
nance and repair must be performed by TA Instruments or other qualified ser-
vice personnel only.
WARNING: This instrument must be connected to an earthed (grounded) power
supply. If this instrument is used with an extension lead, the earth (ground) con-
tinuity must be maintained.
WARNING: Take adequate precautions prior to heating of materials if it can lead
to explosion, implosion or the release of toxic or flammable gases.
WARNING: The impeller is constructed from a rigid polymer composite material
of density about 1.6 g cm-3. It he usual operating angular speed is 160 revolu-
tions per minute, rpm, (16.76 radians per second). Under these conditions the
unit is unlikely to provide a significant hazard to the user, and only the normal
precautions observed when operating the rheometer need be taken.
The instrument software does permit operation of the rheometer at its maximum
angular speed, without immersion of the impeller. Take reasonable precautions
to avoid contact with the impeller when it is rotating at high angular speed.
Ensure that clothing, jewelry, etc. does not become entangled in the impeller.