2I-10800-10
20
8. Quest ATR Clamp Arm and Anvils
8.1. Clamp Arm Assembly
When using the Quest ATR Accessory with a solid sample a load must
usually be applied to ensure good contact between the ATR crystal and
sample. To use: rotate the clamp arm assembly into the position shown
in Figure 8-1, if necessary adjusting the height of the anvil (17) by
adjustment of the Torque Knob (20). When in the correct position the
arm will click into place. When not in use it can be rotated out of the way
and will again click into the parked position.
Figure 8-1: Clamp Arm Assembly with Flat Anvil in Sampling Position
8.1.1. Torque Limiter
To apply a load to the sample it should be placed onto the crystal with
the anvil positioned directly over it. A load is applied by rotating the
torque limited screw knob assembly (20) until it clicks three times. This
will apply a consistent load of 40 lbs to your sample. Further rotation of
the knob will not increase the load beyond 40 lbs.
Always apply force to the sample slowly, applying the
load gradually via the clamping arm assembly. Beware of
point loads, particularly with harder samples, which could
damage your ATR crystal. An acceptable ATR spectrum
for the sample may be produced without having to apply
the maximum load.
