Specac Silver Gate, Руководство пользователя

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Silver Gate™ Evolution ATR System
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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. Clean the powder sample carefully away from the ATR crystal (avoid
the possibility of scratching the ATR crystal surface) and wipe and
clean any powder off the surface of the stainless steel anvil (
13 ).
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 Flat Solid Samples
When analyzing for a flat solid 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 stainless steel anvil P/N GS10567. (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.
3. Take the flat solid sample and place it very carefully such that it
covers the entire surface of the ZnSe, Ge or Si ATR crystal. Ideally
the flat solid sample should be smooth and homogenous with no
hard lumps or inclusions. This will help to avoid any risk of “point
load” to the ATR crystal when being pressed.
4. Close the bridge (
15 ) and lock it to its support block ( 17 ) via the
quick lock/release screw ( 18 ).
5. Begin turning the torque knob assembly (
16 ) clockwise to lower the
stainless steel anvil ( 13 ) towards the sample surface. Continue