Related Manuals for MTEC 300
Summary of Contents for MTEC 300
- Page 1 (217) 352-9330 | Click HERE Find the MTEC 300 at our website:...
- Page 2 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 3 MTEC Model 300 Photoacoustic Detector Operating Instructions August 2005 MTEC Photoacoustics, Inc. 3507 Oakland St., PO Box 1095 Ames, Iowa 50014, U.S.A. Telephone: 515-292-7974 Telefax: 515-292-7125 www.mtecpas.com e-mail: mtec@mtecpas.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
-
Page 4: Table Of Contents
1. Unpacking 1.1 Case Seal ..............1 Packing List..............Damage Inspection ............Introduction MTEC Model 300 Photoacoustic Detector ..... 3 3. Set Up Directions .1 Rear Lever Setting ............Mounting and Aligning the Detector in the FTIR..Purge Gas Connection .......... -
Page 5: Unpacking
1 Unpacking 1.1 Case Seal The case is hermetically sealed to protect the detector from moisture. If the case does not open after the two latches are released, unscrew the valve shown in Fig. 1.1 to release the vacuum. Fig. 1. 1: The arrow marks the location of the vacuum release valve . _______________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... -
Page 6: Packing List
9. Carbon black standard 10. Instrument Manual 11. Applications Literature * If the model 300 photoacoustic detector is powered by the FTIR, a connection cable specific to the FTIR will be supplied instead of the desktop power supply and cord set. -
Page 7: Introduction
FTIR spectrometer. The detector can be used for a wide range of measurements as described in the applications literature. The model 300 is designed for ease of use. It mounts in the standard FTIR slide mount fixture. Sample changing, purging, and sealing are... - Page 8 Fig. 3.2: Sample cup with infrared sensing liquid crystals in place. Fig. 3.3: View from above sample cup showing schematically three different beam positions in the cup as imaged by the liquid crystal (actual images will be larger relative to the cup diameter than shown here). Position 1 indicates ideal alignment.
-
Page 9: Set Up Directions
In order to check alignment, place the detector in the slide fixture. If the fixture has an adjustable lower stop for the slide, be sure that it is set so that the holes in the slide fixture and in the mating model 300 slide plate are concentric. - Page 10 Pattern 3 indicates that the model 300 needs to be lowered. Some FTIR slide fixtures have provision for this adjustment while others do not. If there is no adjustment provided on the FTIR, height adjustments are made by placing small shims provided with the detector between the model 300 slide mount and the yoke coupling plate.
- Page 11 Fig. 3.5a: Extra support screws can be used at the rear of the detector. Note the three slots that the lever can mate into thus positioning the lever to rotate over a range suitable for different FTIR sample compartments. _______________________________________________________________________ Fig.
-
Page 12: Purge Gas Connection
Elmer System 2000, and all Bomem models (identify model). Consult the manufacturers for details. No desktop power supply is provided if a cable is supplied to directly power the Model 300 from the FTIR. Fig. 3.6: Desk top power supply showing on /off light (1), switch (2), and voltage selector switch (3). -
Page 13: Operation
4 Operation 4.1 Preamplifier Gain Control A twelve position switch controls the gain as follows: step# 1 gain 2 50 100 200 500 1000 2000 5000 10,000 factor The gain should be set high enough to give a reasonable interferogram amplitude but not too high to either cause preamplifier clipping (<20V peak- to-peak) or to overload the FTIR's A to D converter. - Page 14 Fig. 4.1: Sample holder with brass inserts and small and large cups . _________________________________________________________________________ Fig. 4.2: Small cup in sample holder. Fig. 4.3. Large cup with polymer pellets. A wrench is engaged in one of the o-ring compression adjusting screws. ________________________________________________________________________ Artisan Technology Group - Quality Instrumentation ...
-
Page 15: Sample Cup Loading
4.3 Sample Cup Loading The MTEC Model 300 is supplied with five small and five large sample cups and five brass spacer inserts. The cups and inserts fit into a brass holder which is attached to the black sample holder handle as shown in Fig. - Page 16 The desiccant is placed in a large sample cup. This cup is inserted into the brass holder (Fig. 4.7), a slotted spacer insert is placed over the desiccant cup, and the slots are aligned to permit gas circulation between the desiccant and sample cups (Fig.
- Page 17 Fig. 4.6: Sample loading funnel and cup fixture. _______________________________________________________________________ Fig. 4.7: Cup with desiccant inserted. Fig. 4.8: Desiccant covered with spacer plate with notches properly aligned. _______________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
-
Page 18: Sample Cup Insertion
4.4 Sample Cup Insertion The sample cup can be inserted from either side of the detector since different sides of the detector are accessible with different FTIRs. Fig. 4.9 shows the sample holder ready to be slid into place for elevation into the sample chamber and sealing. -
Page 19: Purging
Fig. 4.10: Sample cup inserted and sealed _____________________________________________________________________________________ 4.5 Purging Purging increases the signal level by approximately a factor of 2 to 3 and reduces moisture in the sample chamber. Care must be taken in purging the detector, however, to avoid large pressure fluctuations that could damage the microphone. -
Page 20: Ftir Operating Parameters
Ten seconds purge time in each of the purge locations is usually sufficient. Longer times may be necessary if considerable moisture is present. Leaving the detector sealed with desiccant under the sample cup for an extended time is the best way to remove the last traces of moisture. When the detector is initially purged with helium there will be a gradual decrease in signal amplitude as helium exchanges with air in the rear volume of the microphone that is connected to the sample chamber by a... -
Page 21: Measuring And Normalizing A Sample Spectrum
The peak-to-peak noise will be found to increase if a higher mirror velocity is used due to the slow time response of photoacoustic signal generation Fig. 4.11: MTEC Carbon black reference. Keep capped when not in use _______________________________________________________________ 4.8 Measuring and Normalizing a Sample Spectrum 1. -
Page 22: Storage Of The Detector
SH004). The latter option is used with a stereo microscope (not supplied) and micromanipulator. Both options consist of sampling heads that fit into the standard Model 300 sample holder handle. The operation of the sampling heads is shown in the Fig. 5.1 schematic. - Page 23 SAMPLING MODES OF THE MTEC MODEL 300 With SH003 and SH004 ___________________________________________________________________________________________ Fig. 5.1 . ______________________________________________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 24 Fig. 5.2: Option SH003 for PAS, DRIFTS, and transmission sampling. _______________________________________________________________________ Fig. 5.3: Option SH004 for microsamples. _______________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
-
Page 25: User Adjustments And Servicing
6 User Adjustments and Servicing 6.1 Window Replacement It is recommended that the detector be returned to MTEC for window replacement. If the user prefers to replace the window, follow the following directions. The detector's slide plate and mirror housing must be removed to access the detector window. - Page 26 Fig. 6.1: Wrench engaged in top set screw to remove slide plate . _______________________________________________________________________ Fig. 6.2: The mirror housing is removed by taking out the two hold down screws. _______________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 27 Fig. 6.3: Window o-ring compression screws with wrench engaged . _______________________________________________________________________ Fig. 6.4: Disassembled unit ready for window replacement. _______________________________________________________________________ Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
-
Page 28: Service Assistance
7.2 Special Instructions for Foreign Returns If possible, ship the package via a courier, such as Federal Express, who will act on behalf of MTEC as a customs broker. This simplifies the return, expedites clearance through U.S. Customs, and saves extra freight forwarder costs to MTEC which are billed back to the customer. -
Page 29: Product Warranty And Disclaimer
MTEC Photoacoustics, Inc. will not assume responsibility for any damages to persons or to property due to the operation of or to results obtained with the MTEC Model 300 photoacoustic detector system. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
Need help?
Do you have a question about the 300 and is the answer not in the manual?
Questions and answers