Specac Silver Gate, Руководство пользователя

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User Manual
26
rotation until the white cross on the black cover at the top of the
torque knob assembly (
16 ) ceases to rotate. At this point a
maximum load will be applied to the flat solid sample forcing it
against the ATR crystal.
Note: If the sample may be hard or could produce a point load effect,
carry out rotation of the torque knob slowly and apply the load
gradually. An acceptable ATR spectrum for the sample may be
produced without having to apply a maximum load setting from
the torque knob assembly.
6. Collect and record the ATR spectrum for the sample.
7. To remove or change the sample, release the load/pressure on the
sample first by unscrewing the torque knob assembly (
16 ) to retract
the anvil ( 13 ) before undoing the quick lock/release screw ( 18 ) and
raising the bridge ( 15 ) up past the stay up catch device ( 19 ).
8. Remove the flat solid sample carefully away from the ATR crystal
(avoid the possibility of scratching the ATR crystal surface) and
clean the ATR crystal and stainless steel anvil (
13 ) surfaces.
After cleaning (see
Notes on Cleaning page 32), the Silver Gate™
ATR accessory is ready to accept a new sample for measurement.
Collecting ATR Spectra of Pellet/Bead Samples
When analyzing for a pellet/bead or irregular shaped sample it is best
to use a flat ATR crystal top plate assembly on a Silver Gate™ ATR
accessory fitted with a bridge and clamp anvil assembly (
15 ). The best
anvil ( 13 ) to choose would be the concave recessed pellet anvil P/N
GS10532. (See Figure 14.)
1. Collect a background spectrum as described in steps 1 to 4 (page
21).
2. Open the bridge (
15 ) and position it past the stay up catch device
( 19 ). This allows for easier access to the ATR crystal surface area to
position the sample correctly.