Specac Silver Gate User Manual
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Specac Silver Gate User Manual

Single reflection atr system
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Silver Gate™Evolution
Single Reflection ATR System
User Manual
2I-10680 Issue 3

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  • Page 1 Silver Gate™Evolution Single Reflection ATR System User Manual 2I-10680 Issue 3...
  • Page 3 Silver Gate™Evolution Single Reflection ATR System User Manual 2I-10680 Issue 3...

  • Page 4: Table Of Contents

    User Manual Silver Gate™ Evolution ATR System SILVER GATE™ EVOLUTION ATR SYSTEM - P/N GS10680 SERIES USER MANUAL 1. I ................. 4 NTRODUCTION 2. U ............. 6 NPACKING AND HECKLIST 3. I ™ B ........7 NSTALLATION ENCHMARK ASEPLATE 4. A ..............
  • Page 5 ™ ATR S ........37 ILVER ERIAL UMBERS © 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.

  • Page 6: Introduction

    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.
  • Page 7 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.

  • Page 8: Unpacking And Checklist

    User Manual 2. Unpacking 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.

  • Page 9: Installation Via Benchmark

    (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™...

  • Page 10: Alignment Procedure

    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).
  • Page 11 Silver Gate™ Evolution ATR System ATR Crystal Figure 2. Top view of Silver Gate™ ZnSe Flat ATR Crystal Top Plate Assembly ATR Crystal Figure 3. Top view of Silver Gate™ ZnSe Recessed ATR Crystal Top Plate Assembly...
  • Page 12 User Manual Figure 4. Underside view of Silver Gate™ ZnSe Flat or Recessed ATR Crystal Top Plate Assembly Figure 5. Top view of Silver Gate™ Optical Unit without Bridge...

  • Page 13: Alignment

    Silver Gate™ accessory in one orientation only. Align the location holes (2) with the location pins (3). The location slot (2) must be towards the front of the Silver Gate™ Accessory where the thumbscrew fixing (1) is located. Allow the three magnetic catches (4) to engage with their three counter plate fixings (5) to hold the ATR crystal top plate securely in position.
  • Page 14 (Left to right or right to left as seen from the front of the optical unit.) However, to align your Silver Gate™ accessory you need to follow the alignment instructions knowing whether your spectrometer is a left to right or right to left beam (source to detector) configuration.
  • Page 15 (6) and tighten the cover plate thumb screws (7). 5. If the Benchmark™ baseplate is mounted on a rail or is movable in the spectrometer, move the Silver Gate™ ATR Accessory on the Benchmark™ baseplate to find the best position where the transmission is at a maximum.

  • Page 16: Fitting Accessories To The Fitting A Polarizer

    User Manual 5. Fitting Accessories to the Silver Gate™ ATR Optical Unit When the Silver Gate Single Reflection ATR has been installed and aligned in the spectrometer you have the options of fitting a polarizer and/or purging the ATR optical unit.
  • Page 17 The standard aperture ports of the Benchmark™ baseplate compatible optical units (as item 10 for the Silver Gate™ optical unit), will accept a GS12000 Series polarizer. To rotate this type of polarizer, it must be removed from the aperture port and turned to align with the indicating grooves in the aperture port ring for either parallel or perpendicular polarization and then re-inserted.

  • Page 18: Purging The Optical Unit

    User Manual Purging the Optical Unit The Silver Gate™ ATR Accessory is fitted with purge ports (11). The purge port connections are fitted with rubber caps. To purge the optical unit the rubber caps are removed and a suitable size of flexible rubber tubing can be pushed over the ¼”...

  • Page 19: Fitting The Purge Bellows

    10mm for each. Tip : It is easier to cut the purge tube between the ridged grooves. 3. Unscrew the Silver Gate™ Optical Unit fixing thumb screw (1) and remove the Silver Gate™ ATR Accessory from the sample compartment.

  • Page 20: Anvil Options

    Choice of Anvils and their Uses There are two different compression head anvils (13) that can be used with the Silver Gate™ ATR Accessory when fitted with the bridge and clamp anvil assembly. The types of anvil and their uses can be...

  • Page 21: Sampling Using The Silver

    ATR crystal, so it is recommended to use the bridge and clamp anvil assembly (15) of the Silver Gate™ ATR Accessory on the optical unit. In this way a load can be applied to the solid sample from an appropriate compression head...
  • Page 22 User Manual Torque Limiter Screw Assembly The Silver Gate™ bridge and clamp anvil assembly (15) is provided with a special built in torque limiter screw assembly (16). For solid sampling, an appropriate anvil (13) is fitted to the clamp head pressure pin (14).

  • Page 23: Quick Lock And Release

    90º. Stay Up Device At the hinge point of the Silver Gate™ bridge and clamp anvil assembly (15) there is a spring ball bearing stay up catch device (19) that prevents an open bridge from accidentally falling back down to its closed position.
  • Page 24 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).
  • Page 25 Silver Gate™ Evolution ATR System Contamination Check on Anvil If for any sampling procedure the Silver Gate™ bridge and clamp anvil assembly (15) is being used because it is necessary to clamp the stainless steel anvil (13) (P/N GS10567) directly onto the ATR crystal, (e.g.
  • Page 26 User Manual Solid Sample Figure 14. Silver Gate™ ATR Accessory with bridge (15) closed and a powder sample between the anvil (13) and ATR crystal 4. Close the bridge (15) and lock it to its support block (17) via the quick lock/release screw (18).
  • Page 27 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.
  • Page 28 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.
  • Page 29 Silver Gate™ Evolution ATR System 3. Take the pellet/bead or irregular shaped sample and place it very carefully such that it covers as much of the surface of the ZnSe, Ge or Si ATR crystal as possible. Ideally the pellet/bead sample should be smooth and homogenous with no hard lumps or inclusions.
  • Page 30 Collecting ATR Spectra of Fiber Samples When analyzing for a fiber 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.
  • Page 31 Collecting ATR Spectra of Liquids and Paste Samples For analyzing a liquid sample it is best to use a recessed ATR crystal top plate assembly on a Silver Gate™ ATR optical unit. It is not necessary to have a bridge and clamp anvil assembly (15) fitted when sampling liquids as generally they will make good, close contact with the ATR crystal and do not require any external force from an anvil.
  • Page 32 P/N GS10503 supplied (20) can be placed over the liquid to contain it during the analysis. (See Figure 16.) Figure 15. Silver Gate™ ATR Accessory – Optical Unit and Recessed ZnSe ATR Top Plate Assembly without Bridge and Clamp Anvil Assembly Figure 16.
  • Page 33 For analyzing a paste sample either a flat or recessed ATR crystal top plate assembly could be used on the Silver Gate™ optical unit. If the Silver Gate™ accessory has a bridge and clamp anvil assembly (15) fitted, a liquid sample can be analyzed with the bridge in the open (unlocked) position past the stay up catch device (19).
  • Page 34 1. Collect a background spectrum as described in steps 1 to 4 (page 21). 2. If the Silver Gate™ ATR Accessory is fitted with a bridge and clamp anvil assembly (15), open the bridge and position it past the stay up catch device (19).
  • Page 35 ATR accessory is ready to accept a new sample for measurement. Notes on Cleaning When cleaning either a ZnSe, Ge or Si ATR crystal of the Silver Gate™ ATR crystal top plate assemblies in preparation for a new sample, it is very important to take care to avoid damaging the crystal materials.

  • Page 36: P/N Gs10532

    User Manual 8. Silver Gate™ ATR Accessory “Bubble Number” Parts Identification List (1) Optical unit fixing thumb screw. (2) Location holes of ATR crystal top plate assemblies. (3) Location pins of top plate area on optical unit. (4) Magnetic catches of ATR crystal top plate assemblies.
  • Page 37 Specac, or the damaged plate assembly can be returned to Specac for inspection and to try and effect a repair. In the event of such an occurrence please contact Specac to arrange for return of the...
  • Page 38 User Manual 10. Silver Gate™ ATR Technical Specification ZnSe Germanium Silicon ZnSe 45° Ge 45° Si 45° ATR Crystal 7mm diameter 7mm diameter 7mm diameter Accessory 20,000 - 550 5,200 - 650 8333 - 33 Transmission Range cm Refractive 2.43 3.42...
  • Page 39 To help you, please use the grid below to fill in the serial number information of the Silver Gate™ ATR Accessory parts you have received. If you need to contact Specac for any issues regarding your Silver Gate™ ATR accessory it may be necessary to provide the serial number of the item to identify for replacement parts.
  • Page 40 User Manual Notes...
  • Page 41 Silver Gate™ Evolution ATR System Notes...
  • Page 42 User Manual Notes...

  • Page 43: Unit

    Silver Gate™ Evolution ATR System Worldwide Distribution France Switzerland Eurolabo - Paris. Portmann InstrumentsAG Tel.01 42 08 01 28 Biel-Benken Fax 01 42 08 13 65 Tel: 061 726 6555 email: contact@eurolabo.fr Fax: 061 726 6550 email:info@portmann-instruments.ch Germany Website: www.portmann- L.O.T.
  • Page 44 Brilliant Spectroscopy™ www.specac.com SPECAC INC. SPECAC LIMITED 414 Commerce Drive River House, 97 Cray Avenue Suite 175, Orpington Fort Washington, Kent BR5 4HE PA 19034, USA Tel: +44 (0) 1689 873134 Tel: 215 793 4044 Fax: +44 (0) 1689 878527 Fax: 215 793 4011 Registered No.

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