TA Instruments AR 2000, Operator'S Manual

Page: 88 / 144

AR 2000 Operator’s Manual
88
The Pressure Cell Cup
The Pressure Cell Cup contains
the sample fluid. It is inserted into
the Peltier jacket, which mounts
on the rheometer using the Smart
Swap
TM
connection. A copper
sheath ensures good heat trans-
mission between the jacket and the
cup. There are three ports on the
cup, which are identified by
engraved labels.
NOTE: When
installing NPT fit-
tings use
Teflon® thread
sealing tape.
CAUTION: Do not attempt to attach or detach any fittings to or from the cell while it is
mounted on the rheometer. Doing so can cause damage to the instrument.
The Inlet Port
The Inlet Port, which is used in the external pressurization mode, is where the compressed gas is introduced
to the cup. A pressure manifold is supplied that attaches to the inlet port using a compression connector. A
pressure snubber is fitted between the port and the high-pressure line to slow the pressure build and prevent
sample from entering the line.
The Pressure Gauge Port
This port is fitted with a pressure gauge which indicates the pressure within the cell, and a relief valve. This
valve is only intended to be used when the pressure
from the cell cannot be relieved in the usual way (see
"Pressurizing and Depressurizing the Cell," found later
in this chapter). You will need a 5/8-inch open or box-
end wrench to hold the valve body and a 7/16-inch
wrench to open the valve.
Figure 8.3
Pressure Cell Cup with Rotor Assembly
Rupture Disk
Assembly in the
SafetyRelief
Port
Pressure Gauge
in the Pressure
Gauge Port
Rotor
Assembly
Cap
Snubber and
Compression
Fitting in the
Inlet Port
Figure 8.4
Pressure Gauge Port
(Gauge and Valve Shown)