Specac Silver Gate, Руководство пользователя

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Silver Gate™ Evolution ATR System
21
Quick Lock and Release Mechanism
The bridge and clamp anvil assembly (
15 ) carries a quick lock/release
screw mechanism ( 18 ). In operation for sampling with solids using
either the flat or recessed ATR crystal top plate assembly, the bridge
must be closed (see Figure 9). The T-shaped quick lock/release knob
(
18 ) is pushed down and turned clockwise 90º to engage and lock the
bridge closed. To release the bridge, the T-shaped knob ( 18 ) is pushed
down and turned anti-clockwise 90º.
Stay Up Device
At the hinge point of the Silver Gate™ bridge and clamp anvil assembly
(
15 ) there is a spring ball bearing stay up catch device ( 19 ) that
prevents an open bridge from accidentally falling back down to its
closed position. The bridge is lifted open to pass beyond the point
where the ball bearing spring catch engages. When sampling
liquids
using either the flat or recessed ATR crystal top plate assembly, there
is no need to use the bridge and clamping assembly (
15 ) with any anvil
compression heads ( 13 ), so the bridge can stay open if desired (see
Figure 12.)
Important Note for Usage!
The ZnSe, Ge and Si crystals in both the flat and recessed ATR crystal
top plate assemblies have a specific hardness and chemical resistance
and should be treated accordingly. Check on the chemical nature of a
sample before potentially damaging materials are brought into contact
with the ATR crystal.
Be careful not to put a “point load” on the ATR crystal, particularly with
hard or abrasive samples. When using samples such as rubber and
polymer sheeting there should be no problem and normal anvil
pressures may be used. Thin films on plastic substrates should be no
problem, but care should be taken if the substrate is metallic.
Apply pressure from the torque knob assembly (
16 ) turning it gradually.
Take spectra to see if an acceptable load has already been applied for
the sample before the maximum load setting has been reached.