Specac Silver Gate, Руководство пользователя

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User Manual
22
Preparing the Silver Gate™ ATR Accessory for Analysis
For the ZnSe, Ge and Si flat and recessed ATR top plate assemblies
the active sampling area extends across the whole of the ATR crystal.
It is therefore preferable to have enough sample to completely cover
the ATR crystal to utilise the maximum energy throughput available for
the Silver Gate™ ATR accessory.
The procedure for collecting a sample ATR spectrum requires first
obtaining a background spectrum as a reference and then repeating
the procedure with a sample in position on the Silver Gate™ ATR
accessory.
Collecting a Background Spectrum
1. Choose a ZnSe, Ge or Si flat or recessed ATR crystal top plate
assembly to be used on either a Silver Gate™ optical unit with or
without a bridge and clamp anvil assembly.
2. Attach the Silver Gate™ optical unit to the installed Benchmark™
baseplate and fit the chosen ATR crystal top plate assembly to the
optical unit.
3. If using a Silver Gate™ bridge and clamp anvil assembly (
15 ) on the
Silver Gate™ optical unit, then choose an appropriate compression
head anvil (
13 ) (P/N GS10567 or P/N GS10532 - see Figures 10 and
11) to fit to the clamp head pressure pin ( 14 ).
4. The Silver Gate™ ATR accessory should already be aligned to
register an acceptable signal throughput with an ATR crystal top
plate assembly in position. Having ensured that the ZnSe, Ge or Si
ATR crystal is clean, proceed to collect a background spectrum
using any preferred acquisition conditions.
Note: If using a Silver Gate™ bridge and clamp anvil assembly ( 15 )
the anvil ( 13 ) does not need to be in contact with the ATR
crystal to record a background spectrum.