Beam Condenser Accessory
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1. Figure 7 PN 350 031400 02 Page 5 5 The next step is to confirm alignment Place the pinhole alignment fixture inside the Beam Condenser Collect a spectrum using the same collection parameters used for the background spectrum Ratio the sample spectrum against the background spectrum collected in step 1 6 Through the pinhole alignment fixture the transmission at 2000 cm for the 4X Beam Condenser should be greater than 28 and the 6X Beam Condenser should be greater than 18 Figure 8 If your accessory does not meet this minimum transmission level we recommend realigning the instrument If the accessory still does not meet minimum performance standards please contact PIKE Technologies Before calling please record the serial number located on the label on the back of the base optics assembly 56 50 Transmittance Wavenumber cm 1 Figure 7 Energy throughput for the 4X Beam Condenser without pinhole alignment fixture Transmittance w N 4000 3500 3000 2500 2000 400 40 500 Wavenumber cm 1 Figure 8 Energy throughput for the 4X Beam Condenser with pinhole alignment fixture PN 350 031400 02 Page 6 Sampling Procedures Samples need to be held in the focused beam in the Beam Condenser The beam through the Beam Condenser is much smaller than in the main sample compartment thus the sample alignment is more critical For extended samples when you wish to obtain the spectrum of a smal2. PIICE Installation and User Guide TECHNOLOGIES Spectioacopic Creativity Beam Condenser Accessory The information in this publication is provided for reference only All information contained in this publication is believed to be correct and complete PIKE Technologies Inc shall not be liable for errors contained herein nor for incidental or consequential damages in connection with the furnishing performance or use of this material All product specifications as well as the information contained in this publication are subject to change without notice This publication may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of PIKE Technologies Inc nor the rights of others PIKE Technologies Inc does not assume any liability arising out of any infringements of patents or other rights of third parties This document contains confidential or proprietary information of PIKE Technologies Inc Neither this document nor the information herein is to be reproduced distributed used or disclosed either in whole or in part except as specifically authorized by PIKE Technologies Inc PIKE Technologies Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Copyright 1991 2015 by PIKE Technologies Inc Madison WI 53719 Printed in th
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4. am Condenser Accessory Non Adjustable Cell Holder Block Pinhole Alignment Fixture Purge Tubing with Connector PN 031 2020 Quantity 1 Quantity 1 Quantity 1 Hex Wrench Set Quantity 1 Set j PN 350 031400 02 Page 2 Installation The Beam Condenser Accessory has been aligned and tested in the PIKE Technologies facility to ensure that it performs to specifications However some variation in optical alignment can occur from spectrometer to spectrometer To allow for this difference there are alignment screws provided on the base optics assembly for fine tuning once the accessory is installed in the spectrometer The following is the procedure for accessory installation and final alignment 1 Your Beam Condenser is configured to fit the sample compartment of the FTIR instrument you specified Before inserting the accessory in the sample compartment ensure that your spectrometer is aligned If the instrument is not aligned follow the manufacturer s instructions for maximizing the interferogram signal the IR energy throughput of your FTIR spectrometer 2 Place the accessory into the FTIR sample compartment and line up the base plate provided with the holes pins in your FTIR Spectrometer 3 Fasten the accessory onto the FTIR sample compartment base plate using the captive screw s located on the Beam Condenser base plate some accessories may have two mounting screws or a mounting screw pin combination depending on spectrometer c
5. e United States of America All world rights reserved No part of this publication may be stored in a retrieval system transmitted or reproduced in any way including but not limited to photocopy photograph magnetic or other record without the prior written permission of PIKE Technologies Inc Address Comments to PIKE Technologies Inc 6125 Cottonwood Drive Madison WI 53719 Phone 608 274 2721 Fax 608 274 0103 E mail info piketech com Web Site www piketech com Jan 1 2015 Contents Introduction UU 1 _Unpacking Your Accessory k 2_ sia Packing List n 2 _Installation UU aaa 3 Performance Verification UU 1 gt AOS UU 9 Mirrors 9 Introduction PIKE Technologies 4X and 6X Beam Condensers are a low cost high throughput easy to use transmission accessory designed for use in most major FTIR spectrometer models Both accessories utilize highly efficient off axis ellipsoidal mirrors providing magnification of the standard sample compartment IR beam of the FTIR system For example the typical 8 mm diameter sample compartment focal point is reduced to 2 mm using the 4X Beam Condenser and 1 5 mm using the 6X Beam Condenser The compact design employs input transfer optics using two flat folding mirrors to direct the infrared beam to the ellipsoidal mirror and to the sample focus The output transfer optics converts the beam back to the original F number needed to properly direct the beam to the spectrome
6. l portion of the sample make sure the sample is positioned at the focal point of the accessory The Non Adjustable Cell Holder Block standard fits between the focusing mirrors and the two pins in the baseplate assure that the block can be precisely repositioned consistently Two small pins located on the top of the block provide a standard repositioning means for all the sample holders Several sample holders are available the Universal Spring Sample Holder the Micro KBr Pellet and Mull Holder the Magnetic Sample Holder and the X Y Z Adjustable Cell Holder Block To use place the holder on the pins of the cell holder block and you are ready to run the measurement The two small pins are symmetrical so all the sample holders can be mounted two ways The Beam Condenser accessory is factory aligned to maximum throughput for the sample holders positioned such that the sample is to the right of the pins if we are facing the accessory from the front see picture In the other direction the position of the sample will not be in the focus of the beam thus the signal will be much smaller Universal Spring Sample Holder Micro KBr Pellet and Mull Holder Magnetic Sample Holder and Apertures The Universal Spring Sample Holder optional is designed to hold small objects with different diameters Press together the two arms of the holder and position the sample in between the jaws of the holder Make sure that the edges of the sample are held firmly b
7. onfiguration 4 Connectthe blue purge tubing to the front of the accessory using the quick lock connector if purge is required 5 The Beam Condenser accessory is now ready for optical alignment PN 350 031400 02 Page 3 Accessory Adjustment The Beam Condenser accessory may not require any alignment when installed However should you choose to fine tune the accessory follow these steps 1 Installthe pinhole alignment fixture in the accessory Figure 4 The flat side of the alignment fixture is positioned facing toward the input beam side of the spectrometer while the recess side faces the detector side If you are not familiar with the beam direction of your spectrometer call the spectrometer manufacturer Figure 3 Assembly of the pinhole alignment Figure 4 Placement of the pinhole alignment fixture fixture inside the accessory 2 There are four alignment screws that may be used for adjustment of the optical alignment in the Beam Condenser To access the adjusting screws remove the rear purge cover plate by unscrewing the four mounting screws Figure 5 Figure 5 Mounting screws on purge cover plate PN 350 031400 02 Page 4 3 Display the live interferogram on the spectrometer monitor and adjust the input mirror screws until maximum signal is obtained Figure 6 The location of this mirror may be found on the back left or right side depending on the spectrometer brand Contact your spectrometer manufact
8. ow to a certain portion of the sample making sure that the resulting spectrum does not come from other parts of the sample The aperture can be placed inside the pellet holder or held by the magnet of the Magnetic Sample Holder Films and plastics should be measured using the Magnetic Sample Holder optional The film should be stretched in front of the measuring window and held by the magnet supplied with the holder The body of the holder is made of steel thus the magnetic force will hold thin samples in place during the measurement A Micro Diamond Transmission Cell is ideal for easily holding and flattening small samples and is best used with a 4X or 6X Beam Condenser due to the aperture size generally 2 mm or less It is recommended when using this Micro Diamond Cell to align the accessory as described in the manual to verify performance Then insert the Micro Diamond Cell into the cell holder and maximize the energy in the software s monitor mode by adjusting the input mirror prior to use The input mirror may be located in the left rear or right rear of the accessory depending on the direction of the spectrometer beam path as explained on page 5 Figure 6 The X Y Z Adjustable Cell Holder Block optional allows the same sampling with the additional capability of being able to either adjust the sample for maximum signal or to provide a manual scanning capability On the X Y Z mounting arm the two small pins provide the standard repo
9. sitioning means for all the sample holders Figure 9 The X Y Z Adjustable Cell Holder Block PN 350 031400 02 Page 8 Precautions Mirrors In order to provide the maximum transmission in the infrared with minimum spectral interferences the mirrors used in this device are uncoated bare aluminum on a glass substrate Since the coatings are soft care must be taken to avoid damage Normally these mirrors will not need cleaning since they are contained within the housing of the accessory If they do need cleaning they may be gently wiped with a lint free abrasive free cloth such as lens tissue or with a camel hair brush Under no circumstances must the mirrors be rubbed with paper products such as Kleenex since this will produce scratching of the mirror coating Replacement Parts and Options The following maintenance parts are available Part Number 031 2010 031 2020 031 2030 031 2040 031 2050 162 0010 162 0020 031 2070 181 1100 161 1900 PN 350 031400 02 Description X Y Z Adjustable Cell Holder Block Non Adjustable Cell Holder Block Universal Spring Sample Holder Magnetic Sample Holder Micro KBr Pellet and Mull Holder Micro Diamond Cell 1 6 mm Micro Diamond Cell 2 0 mm Holder for Micro Diamond Cell PIKE CrushIR Hydraulic Press Evacuable Pellet Press for 13 mm pellets Page 9 PIIKE TECHNOLOGIES Spectroscopic Creatit ity 6125 Cottonwood Drive Madison WI 53719
10. ter detector The accessory comes standard with a self contained purge enclosure purge tubes hinged sample door to access the sample area a Non Adjustable Cell Holder Block and a 1 3 mm diameter pinhole for use in optical alignment PIKE Technologies has developed the Beam Condenser accessory to accept a number of optional pinned in place sample holding devices that are optimized for applications where a small beam size is desirable An X Y Z Adjustable Cell Holder Block is available for those applications where precise adjustment or sample mapping is required There are also three optional pinned in place sample holders the Universal Spring Sample Holder Magnetic Sample Holder and the Micro KBr Pellet and Mull Holder All three of these sample holders fit onto the alignment pins provided in the Non Adjustable Cell Holder Block or the X Y Z Adjustable Cell Holder Block so that no further adjustment is needed Figure 1 Optical diagram of Beam Condenser Figure 2 IR beam path of Beam Condenser PN 350 031400 02 Page 1 Unpacking Your Accessory In order for you to quickly verify receipt of your accessory we have included a packing list Please inspect the package carefully Items with part numbers can be ordered separately Contact PIKE Technologies for replacement of other items Packing List User Manual 4X or 6X Beam Condenser Optics Purge Tube PN 350 031400 4X PN 031 40XX Quantity 8 Quantity 1 6X PN 031 60XX Quantity 1 Be
11. urer if you are unsure about the beam direction of your spectrometer To adjust turn the screws one at a time slightly and check the signal If it decreases reverse the turn until the maximum signal is obtained Figure 6 Overhead view of input and output mirror adjustment screws 4 Next adjust the output mirror screws until maximum signal is obtained Figure 6 The location of this mirror may be found on the back left or right side of the accessory depending on the spectrometer brand To adjust turn the screws one at a time slightly and check the signal If it decreases reverse the turn until the maximum signal is obtained 5 Repeatthe entire procedure two or three times to fine tune the accessory 6 Replace the rear purge cover plates You are now ready to verify the Beam Condenser optical throughput performance Performance Verification 1 With the accessory removed from the sample compartment collect an open beam background spectrum 2 Place the Beam Condenser accessory in the instrument per installation steps described on page 3 Do not use a sample holder or pinhole alignment fixture inside the accessory during this part of the performance verification process 3 Collect a spectrum of the Beam Condenser using the same collection parameters as used to collect the background spectrum 4 The transmission at 2000 cm for the 4X Beam Condenser should be greater than 40 and 6X Beam Condenser should be greater than 30
12. y the slots machined in the face of the jaws A typical sample such as infrared transmitting jewel stone is now positioned at the center of the aperture on the holder For samples that can be spread onto a 13 mm diameter infrared transmitting window the Micro KBr Pellet and Mull Holder optional should be used The inside diameter of the ring holding the pellet is approximately 13 mm The rings are designed to hold a 13 mm diameter window when measuring pastes or other viscous liquids An inexpensive disposable window can also be made from KBr Powder PN 350 031400 02 Page 7 using a PIKE Evacuable Pellet Press for 13 mm pellets in combination with a PIKE CrushIR Hydraulic Press These windows can fit directly into the Micro KBr Pellet and Mull Holder For KBr pellet measurements such as KBr micro pellets place the Micro KBr Pellet and Mull Holder on the two dowel pins of the Non Adjustable Cell Holder Block Slide the disposable KBr pellet into the slot of the circular ring Thin samples can move in the holder In order to prevent the sample from moving a paper ring or similar simple means should be used to hold the micro pellet parallel to the sample holder Mount the window and lightly tighten the mounting screws of the ring to secure the window Different diameter apertures are also provided to be used with the Micro KBr Pellet and Mull Holder or with the Magnetic Sample Holder Apertures are useful when you wish to limit the measuring wind
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