MTS Series 658 Environmental Chamber - Manual (Page 14)

Series 658 Environmental Chamber 14 Introduction
Mounting brackets and clamps on the base of the Model 658.25 chamber provide
for easy installation and height adjustment. The chamber attaches directly to the
load frame columns. The base of the chamber is equipped with a lip and serves as
a catch basin for minor test medium spills.
Mounting of the model 658.07 uses an attachment kit that installs directly onto
the pull rod.
Constant temperature control is regulated by the NESLAB EX-10 Digital One
Heating Circulator Bath circulating fluid through the heating coil within the
chamber (658.25) or through the chamber itself (658.07). Low level fluid sensors
will shut the system down if the fluid drops unexpectedly to preset minimum
levels.
The standard Model 658 system includes a chamber, closed-loop heating system,
and low level protection.
Spray nozzles provide a continuous fine mist equivalent to a 100% humidity
condition with 0.9% saline solution. Spray nozzles can be positioned in any
direction. The spray system takes fluid from the NESLAB EX-10 Digital One
Heating Circulator Bath reservoir to inject into the nozzle(s) within the chamber.
This provides a saturated spray environment.
Optional pull-rods are used inside the environmental chamber. A flexible bellows
tightly seals these rods. The pull-rods are easily attached to the load cell
(mounted on the base plate of the Bionix load frame) and to the crosshead.
The chamber will work with both axial and axial-torsion grips designed by MTS
to withstand the corrosive environment of the chamber. For axial-only testing,
simple L-clamp grips of titanium or stainless steel are available. Also bollard
grips for sutures, fine wires, filaments, and other threads and thread-like
materials are available.
For both axial and axial-torsional testing, MTS has developed immersible axial-
torsion grips that can be used with both round and flat specimens. These grips are
designed for loads up to +/- 10 kN (2,200 lb) axial with +/- 100 N·m (1000 in. lb)
torsional.