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Silver Gate™Evolution
Single Reflection ATR System
User Manual
2I-10680 Issue 3
Silver Gate™Evolution
Single Reflection ATR System
User Manual
2I-10680 Issue 3
User Manual
2
Silver Gate™ Evolution ATR System
SILVER GATE™ EVOLUTION ATR SYSTEM - P/N GS10680 SERIES
USER MANUAL
1.
I
NTRODUCTION
................................................................................. 4
2.
U
NPACKING AND
C
HECKLIST
............................................................. 6
3.
I
NSTALLATION
V
IA
B
ENCH ARK
™
B
ASEPLATE
................................... 7
4.
A
LIGN ENT
P
ROCEDURE
.................................................................. 8
F
ITTING OF
T
HE
ATR
C
RYSTAL TOP
P
LATE TO THE
O
PTICAL
U
NIT
...... 9
A
LIGN ENT
................................................................................... 11
5.
F
ITTING
A
CCESSORIES TO THE
S
ILVER
G
ATE
™
ATR
O
PTICAL
U
NIT
.. 14
F
ITTING A
P
OLARIZER
.................................................................... 14
B
ENCH ARK
™
P
OLARIZER
R
OTATOR
OUNT
P/N
GS12510 .......... 15
P
URGING THE
O
PTICAL
U
NIT
.......................................................... 16
F
ITTING THE
P
URGE
B
ELLOWS
P/N
GS10707 ................................ 17
6.
A
NVIL OPTIONS
............................................................................... 18
P
ELLET
A
NVIL
P/N
GS10532 ......................................................... 18
S
TAINLESS STEEL
A
NVIL
P/N
GS10567 .......................................... 18
7.
S
A PLING
U
SING THE
S
ILVER
G
ATE
™
A
CCESSORY
......................... 19
G
ENERAL
P
INCIPLES
...................................................................... 19
F
EATURES OF THE
B
RIDGE AND
C
LA P
A
NVIL
A
SSE BLY
................ 19
T
ORQUE
L
I ITER
S
CREW
A
SSE BLY
.............................................. 20
Q
UICK
L
OCK AND
R
ELEASE
ECHANIS
......................................... 21
S
TAY
U
P
D
EVICE
........................................................................... 21
I
PORTANT
N
OTES
F
OR
U
SAGE
..................................................... 21
P
REPARING
T
HE
S
ILVER
G
ATE
™
A
CCESSORY
F
OR
A
NALYSIS
........ 22
C
OLLECTING A
B
ACKGROUND
S
PECTRU
....................................... 22
C
ONTA INATION
C
HECK
O
N
A
NVIL
................................................. 23
C
OLLECTING
ATR
S
PECTRA OF
P
OWDER
S
A PLES
........................ 23
Sil er Gate™ E olution ATR System
3
C
OLLECTING
ATR
S
PECTRA OF
F
LAT
S
OLID SA PLES
..................... 25
C
OLLECTING
ATR
S
PECTRA OF
P
ELLET
/B
EAD
S
A PLES
................. 26
C
OLLECTING
ATR
S
PECTRA OF
F
IBER
S
A PLES
............................. 28
C
OLLECTING
ATR
S
PECTRA
O
F
L
IQUIDS AND
P
ASTE
S
A PLES
........ 29
N
OTES
O
N
C
LEANING
.................................................................... 33
8.
S
ILVER
G
ATE
™
ATR
"B
UBBLE
N
U BER
"
I
DENTIFICATION
L
IST
......... 34
9.
S
ILVER
G
ATE
™
ATR
A
CCESSORY
S
PARE PARTS
............................. 35
10.
S
ILVER
G
ATE
™
ATR
T
ECHNICAL
S
PECIFICATIONS
......................... 36
11.
S
ILVER
G
ATE
™
ATR
S
ERIAL
N
U BERS
........................................ 37
© Apr 2016 Specac Ltd. All rights reserved.
Silver Gate™ and Benchmark™ are trademarks of
Specac Ltd. Other product names that may be mentioned herein
may be trademarks of their respective owners.
User Manual
4
1. Introduction
Thank you for buying a Specac product. We trust it will provide you
with invaluable and excellent service in use.
The Silver Gate™ Evolution Single Reflection ATR is designed for the
quantitative and qualitative analysis of solids, powders, liquids, pastes
and gum-like samples. Sufficient sample is required to cover an ATR
crystal surface of 7mm diameter.
The Silver Gate™ ATR accessory can be configured for use starting
with the optical unit and supplied with or without a bridge and clamp
anvil assembly. There is a choice of zinc selenide (ZnSe), germanium
(Ge) or silicon (Si) flat ATR crystal top plate assemblies and ZnSe or
Ge recessed ATR crystal top plate assemblies to be used on either of
the optical unit assemblies (with or without a bridge.) The ATR crystals
are glue mounted into their respective ATR crystal top plate
assemblies.
A complete Silver Gate™ ATR system consists of an ATR flat or
recessed crystal top plate assembly with a ZnSe or Ge crystal at 45°
incident angle option fitted to an optical unit with a bridge and clamp
anvil assembly. This whole assembly is mounted into a spectrometer
via a Benchmark™ type baseplate for correct positioning of the
accessory to maximize for an optical throughput signal. The ATR
crystal top plate assemblies are interchangeable for placing on a
common optical unit.
The bridge and clamp anvil assembly can be fitted to the Silver Gate™
optical unit as an option if desired. The simplest Silver Gate™ ATR
Accessory configuration is by use of a flat or recessed ATR crystal top
plate assembly on the optical unit without a bridge and clamp anvil
assembly. This combination of parts can be used for the analysis of
liquids and pastes.
For sampling of solids and powders, the bridge and clamp anvil
assembly is fitted onto the Silver Gate™ optical unit. The bridge part
carries a torque limiter screw assembly that provides for a consistent
Sil er Gate™ E olution ATR System
5
and reproducible load to an anvil compression head to enable excellent
close contact of a solid sample with the ATR crystal.
In operation the entire torque screw limiter assembly knob is rotated
until a sufficient load and hence pressure has been applied to the
sample. The torque screw limiter assembly knob will continue to rotate
when the set load is reached, but the drive connection slips and no
more force will be applied. The black colored cover cap with the white
“cross” mark on top of the knob acts as the indicator when the set
applied load is reached in ceasing to rotate. The flat ATR crystal top
plate assemblies are best suited to be used in combination with the
bridge and clamp anvil assembly for solid or powder sample types,
although if the sample is small enough, the recessed ATR crystal top
plate assembly could be used instead.
When using the bridge and clamping mechanism for pressure
application, the compression head anvil does not rotate against the
sample. This ensures that heat is not generated by friction which may
cause changes to the sample, and the sample is not displaced from the
correct sampling position.
The transfer optics unit of the Silver Gate™ ATR consists of mirrors
and optical components to achieve maximum throughput for each flat
or recessed ATR crystal top plate assembly.
As standard a volatiles cover (P/N GS10503) and purge bellows (P/N
GS10707) are supplied with the optical unit without a bridge assembly.
In addition to these parts, a standard stainless steel pressure head
anvil (P/N GS10567) and pellet anvil (P/N GS10532) are also provided
along with the optical unit with a bridge assembly.
User Manual
6
2. Unpackin and Checklist
The Silver Gate™ ATR accessory is provided in its own carry case.
Depending on which Silver Gate™ ATR system has been ordered will
determine the items to check on delivery.
Please check for the following.
1 Silver Gate™ ATR optical unit without bridge and clamp anvil
assembly. - This will include:-
1 Volatiles cover P/N GS10503.
1 Pair of purge bellows P/N GS10707.
1 Silver Gate™ ATR optical unit with bridge and clamp anvil assembly.
This will include:-
1 Volatiles cover P/N GS10503.
1 Pair of purge bellows P/N GS10707.
1 Stainless steel flat anvil P/N GS10567.
1 Pellet anvil P/N GS10532.
With either optical unit assembly:-
1 ATR crystal top plate assembly (choice of ZnSe, Ge or Si flat, or
ZnSe, Ge or Si recessed crystal top plate assembly.
(Any additional ATR crystal top plates ordered with the accessory.)
1 Ball driver 3.0mm
1 Allen key 2.0mm
1 Benchmark™ baseplate for your FTIR spectrometer.
1 Instruction manual for Benchmark™ baseplate installation.
1 Essential Spares Kit of parts (P/N GS10685)
Carefully remove your Silver Gate™ ATR accessory and any ATR
crystal top plates from the carry case in readiness for use.
Sil er Gate™ E olution ATR System
7
3. Installation Via Benchmark™ Baseplate
Figure 1. Sil er Gate™ ATR Accessory – Optical Unit with Bridge and
Clamp An il Assembly and Flat ATR Crystal Top Plate Assembly
The Silver Gate™ ATR is supported on a Benchmark™ baseplate
when installed into a spectrometer. The Benchmark™ baseplate has
three support pillars (one flat support pillar towards the rear and two at
the front with location pins) and a fourth front central pillar into which
the fixing thumb screw (1) of the Silver Gate™ optical unit is tightened.
Note: It is normally best to install the Benchmark™ baseplate in
the spectrometer first before locating the Silver Gate™ ATR
accessory.
Fixing holes and studs in the Benchmark™ baseplate will vary
dependant on the make and model of the spectrometer for which the
Silver Gate™ is to be installed. For details on how to install your
accessory in the spectrometer, refer to the Benchmark™ baseplate
Installation Guide/User anual supplied.
1
User Manual
8
4. Ali nment Procedure
When you have installed the Silver Gate™ ATR accessory into your
spectrometer on its appropriate Benchmark™ baseplate, you should
check for alignment of the accessory. An overall spectral throughput of
between 20% and 55% for ZnSe and Ge ATR flat or recessed crystal
top plate assemblies should be achievable. The Silver Gate™ ATR will
be supplied having a preliminary factory alignment. On installation,
some transmitted energy should be recorded on the spectrometers
energy/light throughput to detector monitoring system, but it will be
necessary to maximize the optical throughput for any specific
spectrometer by adjusting the mirrors in the optical unit of the Silver
Gate™ accessory. To carry out any alignment procedure one of the
Silver Gate™ ATR flat or recessed crystal top plate assemblies must
be fitted to the optical unit.
Fitting of the ATR Crystal Top Plate to the Optical Unit
Six different versions of Silver Gate™ ATR crystal top plate assemblies
can be fitted to the optical unit. They are:-
ZnSe flat crystal top plate assembly, P/N GS10683-1.
Ge flat crystal top plate assembly, P/N GS10683-2.
Si flat crystal top plate assembly, P/N GS10683-3.
ZnSe recessed crystal top plate assembly, P/N GS10684-1.
Ge recessed crystal top plate assembly, P/N GS10684-2.
Si recessed crystal top plate assembly, P/N GS10684-3.
The flat and recessed ATR crystal top plate assemblies are fitted to the
top plate area of the Silver Gate™ optical unit by location holes (2) to
location pins (3) and held in place by magnetic catches (4) to counter
plate fixings (5). (Please see Figures 2, 3, 4 and 5.) Top views of the
flat and recessed ATR crystal top plate assemblies using the ZnSe
crystal as examples are Figures 2 and 3. (Ge and Si top plates are
similar.) The underside view of either the flat or recessed ATR crystal
top plate assembly is shown as Figure 4. The top surface (without
bridge) on the optical unit where to fit the ATR top plates is shown in
Figure 5.
Indice
