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USER MANUAL - LACO Technologies, Inc.

1. B Oil Condensation Coatings and Particles If the failure is due to an accumulation of material in the gauge we may be able to restore your gauge or module by cleaning Contamination may be as simple as condensed water or as difficult as solid particles Oils and hydrocarbons Exposure of the gauge internal surfaces to oils and hydrocarbons can result in sensor contamination Some of these types of contamination may be removed by cleaning the gauge If there 49 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS is the possibility of oil back streaming from wet vacuum pumps it is recommended that a filter or trap be installed to prevent contamination of components of your vacuum system Condensation Some gases such as water vapor can condense on sensor surfaces forming a liquid coating that changes the rate at which heat is removed from the sensor which changes the calibration The sensor can often be restored simply by pumping on the gauge between process cycles A dry N2 purge will help speed up drying or the gauge may be gently heated provided temperature doesn t exceed the specified limit of 40 C operating Coatings Some gases can condense on sensor surfaces forming a solid coating which changes the rate at which heat is removed from the sensor Some of these coatings may be removed by cleaning the gauge Particles Particles generated by the process may enter the gauge duri
2. 1 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 3 1 VACUUM CHAMBERS The most common vacuum degassing chamber is a cylindrical vessel fitted with a vacuum control valve vacuum release valve vacuum dial gauge L type gasket and a clear acrylic or metal lid The cost of cylindrical vacuum chambers tend to increase far more with increases in diameter than length Horizontal chambers will also be more than corresponding vertical chamber due to the need for cradle supports and lid hinging This orientation is preferred if the product is easier to load and monitor A common option for horizontal chambers include shelf support rails and removable shelves Vacuum degas chambers are most commonly made from 304 stainless steel however LACO offers vertical chambers also in aluminum and clear acrylic for full viewing To select a chamber for your purpose ensure that your container will fit into the chamber with sufficient space to allow for expansion of the liquid to be degassed Initially fill your container one quarter with mixture experience will show the limit of mixture level permissible 3 2 VACUUM PUMP AND HOSE Based on the application the vacuum pump can be the greatest cost and the most critical component for successful degassing Choices range from dry membrane pumps capable of vacuum levels down to 60 Torr or 27 inHG for single stage models and 7 Torr or 29 inHG for two stage models The
3. 50 33 40 50 44 23 76 70 60 35 77 10 100 66 81 97 48 147 135 121 71 153 20 200 13 1 161 198 222 95 299 272 243 141 304 50 50 0 324 405 49 2 549 235 725 690 600 348 772 100 100 643 820 97 2 107 468 143 136 121 700 159 200 200 126 165 194 210 91 1 275 262 250 141 315 500 mTor 500 312 435 486 489 217 611 54 687 359 781 1 100 600 940 970 950 400 105 104 155 745 160 10 100 400 OP 103 497 178 296 339 OP 215 279 5 80 OP 223 659 229 332 372 OP 584 355 785 OP 776 822 257 379 414 OP 842 883 OP 209 925 274 468 491 OP OP OP 979 OP 295 3 32 599 642 OP OP OP 11 3 380 359 689 752 OP OP OP 135 485 394 763 842 OP OP OP 16 1 OP 604 421 828 921 OP OP OP 600 600 188 730 444 886 995 OP OP OP 218 OP 859 465 942 107 OP OP OP 0 OP 00 OP 00 OR OP 941 475 976 111 OP OP OP 997 484 995 114 OP OP OP 499 105 120 OP OP OP 5 08 111 27 OP OP OP 7 23 7 25 1 900 Torr 900 285 32 5 Notes 1 OP overpressure indication display will read 999 Torr 2 Di
4. The InstruTech CVM211 will directly replace Granville Phillips Mini Convectron modules that have a 9 pin D sub connector DE 9P and you can use your existing cables and electronics For new installations fabricate a cable to connect to the signals functions you want to use Signals and pin assignments are described below Table 12 Connector and Pinout PIN NUMBER PIN DESCRIPTION 40 Analog Output Log Linear 1 8 V or Non linear Granville Phillips compatible Relay Disable Disables Relay 1 when connected to pin 4 Ground 35 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 19 SETUP AND OPERATION 19 1 USER INTERFACE BASICS The user interface is designed for easy operation and a natural progression of setup parameters This section gives a brief explanation of operation and programming parameters A complete user interface map is provided following this section The CVM211 Stinger module has four settings that can be programmed by the user with a 3 position switch located on the side of the module housing Pressing the switch straight in is referred to as pressing the lt select gt key Pressing the switch upward is referred to as pressing the lt up gt key Pressing the switch downward is referred to as pressing the down key During setup and operation be sure to consider the Torr mTorr LEDs 19 2 PROGRAMMING 1 With the
5. 3 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 5 RECOMMENDED PROCEDURES NOTE One can also monitor the time and vacuum level on the vacuum gauge as well as the material to determine the length of time to hold it under vacuum The length of time to degas is highly dependent on the product and the particular application Often an absolute pressure vacuum gauge is used to monitor the vacuum level of the system and determine if gases or solvents are evolving from the product The vacuum chambers are equipped with a relative 0 30 in HG vacuum gauge which is mainly used to determine a rough vacuum level For more accurate measurement and control of the process contact LACO about an absolute vacuum gauge 10 Open the vacuum release valve and remove the lid 11 Fill the mold s carefully to minimize trapped air 12 If necessary place the mold s into the vacuum chamber 13 Repeat stages above as necessary 14 Some bubble may appear at the mixture surface and burst 15 Continue degassing for about 30 seconds at full vacuum 16 Repeat steps 10 11 12 51 VACUUM PUMP OIL CHANGES The vacuum pump is the most critical maintenance item in a degassing system For oil sealed rotary vane vacuum pumps the most critical maintenance item is to change the pump oil frequently The frequency will depend on the application and usage but it is recommend that if the oil ever turns cloudy dark or is
6. 8 Thereadout will display the current span value To set the atmospheric pressure reading also known as the span adjustment flow nitrogen gas or air into your closed vacuum chamber to allow the pressure to rise to a known value above 400 Torr Alternatively if your local uncorrected barometric pressure air is known simply vent your vacuum system chamber to expose the gauge to the local atmospheric 9 pressure Factory default 760 Torr If you do not have a known pressure in the gauge press select briefly less than 3 seconds to exit the setup menu and return to the normal pressure display without saving a new span value If you do have a known pressure in the gauge use the up down keys to change the displayed value to agree with the known pressure Press and hold select for 3 seconds until the displayed pressure switches to the new value This will save the new span setting and return to the normal pressure display 10 It is good practice to perform the sequence of checking and adjusting span ATM then zero VAC and then finally re checking the span setting to ensure that the circuitry is properly balanced for use in measuring pressure throughout the intended measurement range 19 3 RETURN TO FACTORY DEFAULT SETTINGS You can reset all values to the original factory default settings by holding the up key for 5 seconds The display will read dEF until 5 seconds has passed at which
7. Indicated Pressure Torr convection gauge CVG 2 4 Convectron N2 CVG Ar He e CVG He Gas Correction Chart The Y axis of the above chart is actual pressure as measured by a capacitance manometer a diaphragm gauge that measures true total pressure independent of gas composition The X axis is the pressure reading indicated by the convection gauge under test This chart shows readings for an InstruTech convection gauge CVG and Granville Phillips Convectron gauge to illustrate that the difference in the response for both of these types of gauges is virtually indistinguishable CAUTION not assume this data applies to other convection gauges which may or may not be the same Refer to the table in Section 21 and note the following examples Ex A If the gas is nitrogen N2 when the true total pressure is 500 Torr the gauge will read 500 Torr Ex B If the gas is argon Ar when the true pressure is 100 Torr the gauge will read about 9 Torr If you are backfilling your vacuum system with Ar when your system reaches a pressure of 760 Torr true pressure your gauge will be reading about 23 Torr Continuing to backfill your system attempting to increase the reading up to 760 Torr you will over pressurize your chamber which may present a hazard 40 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Ex
8. 1 8180 2 1950 2 1720 2 2 8418 2 3330 2 939 2 6950 1 921 2 6470 2 6660 3 5080 2 631 5 3 6753 90280 4 387 2 429 3 715 10 4 2056 3 4800 5 7740 4 2250 3 6700 2 7340 3 2040 3 3300 4 605 2 966 5 406 S0 4 8464 4 037001 4 9160 4 0710 5 75 6 159 100 4 9449 4 1220 5 0260 4 1540 6 483 200 5 0190 4 1920 5 1060 4 3360 3 2690 3 8270 3 8830 6 661 300 5 1111 4 2830 5 2000 4 5020 3 3840 3 9380 4 005 400 5 2236 4 3860 5 3150 4 6210 3 4660 4 0160 4 0880 500 5 3294 4470 5 4220 4 7080 3 5260 4 0760 4 1510 600 5 4194 4 55000 5 5150 4 7750 3 5730 4 1240 4 2030 700 5 4949 46110 5 5920 4 8300 3 6130 4 1660 4 2470 760 5 5340 4 6430 5 6330 4 8600 3 6320 4 1900 4 2710 800 5 5581 4 6630 5 6580 4 877 900 5 6141 4 7060 5 7130 4 9190 3 6740 4 2370 4 321 1000 5 6593 4 7450 5 7620 3 6900 4 2700 4 3540 eo eo e e e i eo ojojo O 1 392 2 014 3 313 2 1640 e e 4 699 9 172 9 983 5 720 9 860 OO N N N O I 5 e eo eo eo oO ojojojo eo Ojo OoOj ojojojojojojoijioljo 6 76 eo 6 103 Ojo O Co eo eo N 6 84 6 342 O Ojo 6 9
9. CVM211 in the normal pressure display mode press and hold select for 3 seconds 2 readout displays the value of the setpoint turn on pressure relay energizes when the pressure is below this value Factory default 100 mTorr 3 keep this value and proceed to the next step press select b To change the value use the lt up gt lt down gt keys Then press lt select gt to save and go to the next step 4 The readout displays the value of the setpoint turn off pressure The relay de energizes when the pressure is above this value Factory default 200 mTorr 5 a keep this value and proceed to the next step press lt select gt b To change the value use the lt up gt lt down gt keys Then press lt select gt to save and go to the next step 6 The readout will display 000 to indicate the unit is in the zero adjust mode To properly set zero with the CVM211 installed on your vacuum system the gauge should be evacuated to a pressure below 1 10 Torr Factory default 000 mTorr 36 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS If the gauge is not evacuated to a pressure below 1 x 10 Torr press lt select gt to proceed to the next step without saving a new zero value If the gauge is evacuated to a pressure below 1 x 10 Torr press down to save the new user zero and proceed to the next step
10. Due to the possibility of corrosion when used in certain environmental conditions it is possible that the product s safety could be compromised over time It is important that the product be periodically inspected for sound electrical connections and equipment sound electrical connections and equipment grounding or electrical insulation has been compromised 17 2 SAFETY PRECAUTIONS SERVICE AND OPERATION Ensure that the vacuum port on which the CVM211 vacuum gauge is mounted is electrically grounded Use an appropriate power source of 11 to 30 Vdc 2 W Turn off power to the unit before attempting to service the module Turn off power to the unit if a cable or plug is damaged or the product is not operating normally according to this User Manual Contact qualified InstruTech service personnel for any service or troubleshooting condition that may not be covered by this User Manual It is important that the product be periodically inspected for sound electrical connections and equipment grounding Do not use if the equipment grounding or electrical insulation has been compromised Do not use if the unit has been dropped or the enclosure has been damaged Contact InstruTech for return authorization and instructions for returning the product to InstruTech for evaluation 17 3 ELECTRICAL CONDITIONS WARNING When high voltage is present in any vacuum system life threatening electrical shock hazard may exist unless all exposed electrica
11. FEMALE 1 2 IN CAJON 8VCR FEMALE 16 6 OPTIONS amp ACCESSORIES Part Number Optional Wall Mount AC DC 2 PS401 Power Supply with North American AC Plug whys PS401 A Input 100 240 Vac Output 24 Vdc 750 mA 18 W i 4 Various AC plugs 6 ft cable length with Universal European AC Plug 4 PS401 EU with UK AC Plug a PS401 UK with China AC Plug 5401 with Australian AC Plug L PS401 SP 29 2014 LACO TECHNOLOGIES INC 17 SAFETY LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS InstruTech has designed and tested this product to provide safe and reliable service provided it is installed and operated within the strict safety guidelines provided in this manual Please read and follow all warnings and instructions To avoid serious injury or death follow the safety information in this document Failure to comply with these safety procedures could result in serious bodily harm including death and or property damage Failure to comply with these warnings violates the safety standards of installation and intended use of this instrument InstruTech Inc disclaims all liability for the customer s failure to comply with these instructions Although every attempt has been made to consider most possible installations InstruTech cannot anticipate every contingency that arises from various installations operation or maintenance of the module If you have any questions about the safe installation
12. and use of this product please contact InstruTech 17 1 SAFETY PRECAUTIONS GENERAL WARNING _ There no operator serviceable parts or adjustments inside the product enclosure Refer servicing to service trained personnel Do not modify this product or substitute any parts without authorization of qualified InstruTech service trained personnel Return the product to an InstruTech qualified service and repair center to ensure that all safety features are maintained Do not use this product if unauthorized modifications have been made WARNING Source power must be removed from the product prior to performing any servicing After servicing this product ensure that all safety checks are made by a qualified service person When replacement parts are required ensure that the parts are specified by InstruTech Inc Substitutions of non qualified parts may result in fire electric shock or other hazards Use of unauthorized parts or modifications made to this product will void the warranty To reduce the risk of fire or electric shock do not expose this product to rain or moisture These products are not waterproof and careful attention must be paid to not spill any type of liquid onto these products Do not use these products if they have been damaged Immediately contact InstruTech Inc to arrange return of the product if it is damaged 30 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS
13. by adjusting zero and span atmosphere using the procedure described previously in section 19 2 titled Programming also see User Interface Map Zero and span atmosphere calibration affect the displayed value and the output signal Zero calibration optimizes performance of the gauge when operating at low pressure range of 1 x 10 Torr to 1 x 10 Torr If your minimum operating pressure is higher than 1 x 10 Torr it is not normally necessary to perform calibration at zero and thus span calibration should be adequate If you are able to evacuate your system to below 1 x 10 Torr it is always a good practice to check and set zero if necessary This will also improve performance in cases where gauge contamination is causing higher readings than 1 x 10 Torr even though the system has been evacuated to below 1 x 10 Torr Care should be exercised when using gases other than nitrogen N2 air LACO VACUUM GAUGE CALIBRATIONS For vacuum gauge calibration services on ISO 17025 A2LA and NIST traceable certificates you can meet demanding quality standards with vacuum gauge calibration services from LACO Technologies Our calibration lab services all types of vacuum gauges see Range amp Capabilities most shipping in 2 weeks or less Calibrations are charged per sensor Any associated controllers displays or power supplies should be included with the gauge sensors so they can be calibrated as a set LACO gauge calibrations services fea
14. into a complete measuring instrument There are two different models of Stinger One model provides a non linear analog output and one setpoint relay The non linear analog output is identical to the MKS Instruments Granville Phillips S curve The other model provides a Log linear analog output and one setpoint relay A built in display provides a convenient user interface for setup and operation of the vacuum gauge This User Manual is intended to be used with CVM211 displaying pressure in Torr mTorr units of measure 27 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 16 3 SPECIFICATIONS Table 10 Stinger Specifications COMPONENT DESCRIPTION MEASUREMENT RANGE SIGNAL ACCURACY N2 TYPICAL 1 0 X 10 TO 400 TORR 10 OF 400 to 1 000 Torr 2 5 of reading READING REPEATABILITY TYPICAL DISPLAY 1x10 to 1000 Torr 1 33 x 10 4 to 1333 mbar 1 x 10 2 Pa to 133 kPa 1 0 x 10 4 to 1 0 x 10 3 Torr 0 1 mTorr resolution 2 of reading 3 digit LED 3 digits from 999 Torr to 10 0 mTorr 2 digit LED from 9 9 mTorr to 1 0 mTorr 1 digit LED from 0 9 mTorr to 0 1 mTorr 9 25 in2 59 7 cm2 MATERIALS EXPOSED TO GASES INTERNAL VOLUME INTERNAL SURFACE AREA WEIGHT 4 8 oz 136 9 HOUSING ELECTRONICS OPERATING TEMPERATURE STORAGE TEMPERATURE 40 to 70 C 0 to 95 relative humidity non condensing Operating 8 200 ft 2 500 m max storage 41 000 ft 12 5
15. mould It is essential that the vacuum is released immediately after degassing It may help to gently vibrate the mould full of material to temporarily overcome any tendency of the material to be thixotropic i e non flowing such as with certain casting plaster mixes If the material has already begun to set while in vacuum and the surface is not smooth but sponge like then upon release of the vacuum air will enter the body of the material and create a gassy cast Should this happen then vibration under vacuum and during vacuum release is needed so that the material flows in to all the cavities 7 APPENDIX B CARING FOR ACRYLIC 7 1 WASHING Wash acrylic with a solution of mild soap or detergent and lukewarm water Use a clean soft cloth applying only light pressure Rinse with clean water and dry by blotting with a damp cloth or chamois Grease oil or tar may be removed with a good grade of hexane aliphatic naphtha or kerosene These solvents may be obtained at a paint or hardware store and should be used in accordance with manufacturer s recommendations DO NOT USE Window cleaning sprays kitchen scouring compounds or solvents such as acetone gasoline benzene alcohol carbon tetrachloride or lacquer thinner These can scratch the sheet s surface and or weaken the sheet causing small surface cracks called crazing Acrylic can be cleaned with the following commercial cleaners without damaging the coated surface Fantastik hou
16. pressure below 1x10 Torr no ss Press lt down gt to save the new user zero and exit yes to the normal pressure display To proceed to next step without changing the zero value press lt select gt Readout displays current span value Factory default 760 Torr Is system backfilled with air or 2 to some known pressure above 400 Torr Or open to atmosphere with known barometric pressure to agree with the known pressure To exit setup mode and return to the Press and hold lt select gt for 3 seconds until the display normal pressure display without switches from the original span value to the new saving a new span value press span value Unit will then exit setup menu and Use lt up gt lt down gt keys to change the displayed value I select briefly return to the normal pressure display mode To return all settings to original factory defaults press up key and hold for 5 seconds Display will read dEF After 5 seconds factory default settings will replace all user settings and readout will return to normal pressure display 38 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 20 USING THE GAUGE WITH DIFFERENT GASES A thermal conductivity gauge senses heat loss which depends on the thermal conductivity of the gas surrounding th
17. running above 1 Torr inlet pressure connect an exhaust mist eliminator to the exhaust port to remove pump fluid vapors and smoke Contact LACO Technologies for more information on exhaust mist eliminators If the exhaust line is attached to a negative pressure exhaust system adjust the negative pressure so that the vacuum pump fluid will not be drawn from the pump 13 1 START UP Before starting the pump please complete the following checklist CAUTION not connect power to your pump until the blank off plate is removed from the exhaust port Operating the pump with the exhaust port blanked off will damage the pump and can injure the operator Be sure that the pump is filled with the appropriate amount of vacuum fluid Be sure that all electrical connections have been properly wired and that there are no bare wires that could cause an electrical shock or fire Be sure that the rotation of the pump is correct You will find a rotational arrow on the front of the motor Be sure that all system connections have been secured with the appropriate seal rings and clamps WARNING If your pump has been prepared for oxygen service check if an explosion proof motor is required 21 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 13 2 OPERATION 1 These vacuum pumps are not designed for use in corrosive service When pumping hazardous or corrosive passes we recommend the use of a
18. 00 m max Horizontal recommended ANALOG OUTPUT Log linear 1 to 8 Vdc 1 V decade or non linear analog S curve 0 375 to 5 659 Vdc Gold plated tungsten 304 amp 316 stainless steel glass nickel Teflon 1 589 in3 26 cm3 Molded plastic 0 to 40 C Granville Phillips compatible One single pole double throw relay SPDT 1 A at 30 Vdc resistive or ac non inductive Low Voltage Directive 2006 95 EC EN61010 1 ENVIRONMENTAL 16 4 DIMENSIONS fitting dimension A 4 12 in 104 7 mm 1 8 male 1 2in tube 1 00 in 25 4 mm NW16KF 1 30in 33 0 mm NW25KF 1 30 in 33 0 mm 1 9 in NWAOKF 1 30 in 33 0 mm 48 3 mm 1 1 3 in Mini Conflat 1 47 in 37 3 mm 2 3 4in Conflat 1 47 in 37 3 mm 1 4in Cajon 4VCR 1 86 in 47 2 mm 1 2in Cajon 8VCR 1 75 in 44 5 mm 1 14 in 29 0 mm 28 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 16 5 PART NUMBERS Table 11 CVM211 Fittings Flanges CVM211 FITTINGS FLANGES PART NUMBER WITH LOG LIN PART NUMBER WITH NON EAR ANALOG INPUT LINEAR ANALOG INPUT COMBINATION 1 8 IN NPT MALE 1 2 CVM211GAL CVM211GAA IN TUBE USE 1 8 IN NPT MALE OR 1 2 IN O D O RING COMPRESSION NW16KF CVM211GBL 1GBA NW25KF CVM211GCL 1GCA NW40KF CVM211GDL 1GDA 1 1 3 IN MINI CF NW16CF MINI CVM211GEL CONFLAT 2 3 4 IN CF NW35CF CONFLAT 1 4 IN CAJON 4VCR
19. 0205 MV300300 MV300305 MV300400 MV300405 MV300500 MV300505 MV300600 MV300605 MV300610 MV300615 MV300620 MV300625 MV300630 MV300635 MV300900 MV300905 MV300910 MV300915 MV300920 MV300925 MV300930 MV300935 MV300940 MV300945 400910 400915 MV400920 MV400925 MV400930 MV400935 MV400940 MV400945 LMSA8001 12 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 9 APPENDIX D W2V40 ROTARY VANE HIGH VACUUM PUMP USER MANUAL 10 SAFETY This manual contains installation operation maintenance and troubleshooting information for the W2V40 Rotary Vane Vacuum Pump Please read the manual in its entirety before operating the pump Our rotary vane vacuum pumps are designed to ensure safety when used properly It is the responsibility of the user to follow safety related warnings cautions notes and other requirements described in this manual Returned equipment will not be accepted without prior authorization Prior to shipping please call for a returned material authorization RMA number LACO Technologies reserves the right to cancel the warranty if the pump is disassembled without authorization if pump fluids are used that are not compatible with the design and materials used in the manufacture of the pump and if unauthorized spare parts are used Death or serious injury can result from improper use or application of this pump If the pump will be exposed to toxi
20. 4 7 000 7 056 6 519 O O O O e 6 642 Values listed under each gas type are in volts Note By design these values are identical to the outputs from MKS Instruments Granville Phillips Convectron gauges Mini Convectron modules and controllers so that equivalent units can be interchanged without affecting your process system or software An analog output of less than 01 volts to near O volt indicates a damaged or faulty sensor Refer to the next page if you have a CVM211 Stinger with a log linear analog output 44 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 22 2 LOG LINEAR ANALOG OUTPUT The following table is for use with CVM211 Stinger part numbers ending with the letter L providing an output voltage that is linear with respect to the log of pressure Log Linear analog output for CVM211GAL through CVM211GHL True Pressure 0 0001 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 699 1 699 0 0010 2 000 1 845 1 903 2 000 2 041 1 602 2476 247 1845 2 230 2 491 2 38 2845 2 77 0 0100 3 000 2 820 2 908 2987 3 041 2 681 3 167 3 435 3 38 3 839 3 77 0 1000 4 000 3 808 3 914 3 988 4 029 3 670 4 155 4 083 3 845 4 201 4 418 4 39 4 774 4 83 10000 5 000 4 778 4 973 4 987 4 978 4 602 5 021 5 01 5 220 5 61 5 418 7 39 8 041 6 332 6 446 8 8 04 m 10 0000 6 000 5602 8 041 6 013
21. 498 TECHNOLOGIES LACS USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS CONTACT US LACS PHONE FAX Toll Free 800 465 1004 Phone 801 486 1004 Fax 801 486 1007 ADDRESS LACO Technologies Inc 3085 West Directors Row Salt Lake City UT 84104 WEB www lacotech com info lacotech com SMT 09 1002 RevB1 ii O 2014 LACO TECHNOLOGIES INC CONTENTS 16 22 24 25 SCOPE e 1 1 COMP ONEN 1 BASIC OPERATION ne 3 RECOMMENDED PROCEDURES 4 APPENDIX A REMOVAL OF AIR FROM LIQUIDS 5 APPENDIX B CARING FOR ACRYLIC nus 8 APPENDIX C SPARE PARTS AND ACCESSORIES 9 APPENDIX D W2V40 ROTARY VANE HIGH VACUUM PUMP USER MANUAL cocer ei blieb 13 APPENDIX E INSTRUTECH STINGER CONVECTION VACUUM GAUGE MODULE USER MANUAL 26 42 FACTORY SERVICE AND SUPPORT 51 WARRANTY Er PHA UV 51 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 1 SCOPE 2 SAFETY 3 COMPONENTS This manual outlines the components safety information recommended maintenance for LACO Technologies Vacuum Degassing Systems Following these recommended procedures will ensure that your degassing system is performing at its highest le
22. 5 696 5250 5 471 5 57 5 61 100 0000 7 000 5 946 8 041 7 320 5 966 5 438 5 670 5 80 5 87 5 92 5 96 5 99 6 02 6 04 6 057 8 04 6 079 8 04 1000 0000 8 000 6 512 8 041 8 041 7 045 5 706 6 045 6 104 8 04 Values listed under each gas type are in volts 8 04 8 04 8 04 8 04 8 04 8 04 8 04 8 04 8 04 The log linear output signal and pressure are related by the following formulas P 10 V logio P 5 where P is the pressure in torr and V is the output signal in volts An analog output of less than 01 volts to near 0 volt indicates a damaged or faulty sensor The chart on the following page shows the graphical results of the table and formulas given above for nitrogen True pressure N is plotted on the X axis with a log scale The output signal is plotted on the Y axis on a linear scale 45 2014 LACO TECHNOLOGIES INC Output Signal Volts LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Log Linear Analog Output Voltage vs Pressure 0 0001 0 001 0 01 0 1 1 10 100 1000 Pressure Torr Chart of the calculated pressures using the formulas and data for the log linear output signal for nitrogen from the previous page 46 2014 LACO TECHNOLOGIES INC 23 SERVICE LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 23 1 CALIBRATION Every InstruTech module is calibrated prior to shipment using nitrogen N2 However you can calibrate the instrument
23. AND SYSTEMS 11 2 4 W2V40 EXPLODED VIEWS 18 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 12 PREPARATION amp INSTALLATION 12 1 RECEIVING Each rotary vane vacuum pump is inspected and carefully packed prior to shipment Inspect it after carefully unpacking it In case of external damage retain the shipping container and notify the shipping carrier and LACO immediately The packing materials are designed specifically for the pump they should always be used when transporting the pump Unpack the pump and check for shipping damage as follows 1 Inspect the outside of the shipping container for shipping damage If you will be making a damage claim save the shipping container and packing materials 2 Unpackthe pump 3 Carefully inspect the pump for damage 4 Ifyou find any damage proceed as follows a Savethe shipping container packing material and parts for in spection b Notify the carrier that made the delivery within 7 days of delivery c Filea claim with the carrier d Contact LACO Technologies to make arrangements for replacing the damaged part s 12 2 REPORTING SHIPPING SHORTAGE If you did not receive all the goods that you ordered do the following 1 Checkthe number of items listed on the packing slip If the number of pieces listed is greater than the number of shipping containers re ceived contact the carrier concerning the missing piece 2 Ch
24. C If the gas is helium He the gauge will read 999 Torr when pressure reaches about 10 Torr true pressure and opening the chamber to atmosphere prematurely may present other hazards for both people and product CAUTION What these examples illustrate is that using gases other than nitrogen N2 without using accurate gas conversion data and other proper precautions could result in injury to personnel and or damage to equipment Suggested precautions when using gases other than nitrogen N2 Install a pressure relief valve or burst disk on your chamber to protect it from overpressure Post a warning label on your gauge readout that states Do Not Exceed Indicated Pressure fill in the blank for maximum indicated pressure for the gas you use so that an operator using the gauge will not exceed a safe pressure 21 DISPLAY The table below shows the displayed readings at various pressures for selected gases EES 00 00 00 00 02 02 02 02 05 05 05 05 00 0 1 0 1 05 08 1 0 Displayed Pressure Readings vs True Pressure for selected gases Pressures shown in bold italic font in the shaded areas are in mTorr Pressures shown in normal font and in non shaded areas are in Torr True Total ES Freon12 Freon12 Pressure 0 00 01 mTorr 01 0 1 0 2 mTor 0 2 _ 02 0 5 05 05 0 7 1 1 0 4 2 20 14 16 20 23 1 0 5
25. Coefficients for LL 100 624 0 37679 20 5623 Eod 0 0348656 Where pressure in Torr measured analog output in volts Example Measured analog output voltage is 0 3840 V From first table shown above use equation a bx dx X 20 3840 volts 0 02585 b 0 03767 0 04563 d 0 1151 e 0 04158 f 0 008738 y x Pressure 1 0E 03 Torr 43 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS The following table is for use with CVM211 Stinger part numbers ending with the letter A providing a nonlinear analog output Non Linear analog output for CVM211GAA through CVM211GHA T meme 8 Ar He o co _ Freons2 rreonaz oe Pressure 0 3751 0 3750 0 3750 0 3750 0 3750 0 3750 0 3750 0 3750 0 3750 0 375 0 3759 0 3757 0 3755 0 3760 0 3760 0 3755 0 3760 0 3760 0 3760 0 375 0 0 0 0 1 0 3768 0 3760 0 3765 0 3770 0 3770 0 3768 0 3780 0 3780 0 3770 0 376 0 5 1 0 375 0 376 0 378 0 382 0 389 0 403 0 438 0 492 0 584 0 96 O Ojo eo eo 0 380 0 382 0 378 0 382 0 385 0 3880 0 3880 0 3860 0 381 0 3890 0 3920 0 395 0 4010 0 4000 0 3960 0 388 0 412 0 4370 0 4320 0 4250 0 405 10 mTorr 0 4555 0 4290 0 4410 0 4530 0 4620 0 4150 0 4880 0 4800 0 4700 0 484 0 778 0 60 0 76 1 2650 1 002 1 1940 1 8260 1 8050 1 9140 1 469 1 Torr 2 2168
26. LY IN FAVOR OF THE ORIGINAL BUYER THE 51 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS BUYER S SOLE REMEDY SHALL BE THE REPAIR OR REPLACEMENT AS IS EXPRESSLY PROVIDED HEREIN OF ANY WARRANTED DEFECTIVE PRODUCT OR PART AND UNDER NO CIRCUMSTANCE SHALL SELLER BE LIABLE TO BUYER OR ANYONE ELSE FOR ANY CONSEQUENTIAL DAMAGES TO PERSONS OR PROPERTY FOR INCIDENTAL DAMAGES OR LOSS OF TIME FOR ANTICIPATED OR LOST PROFITS OR ANY OTHER LOSS INCURRED BY THE BUYER RELATED TO THE PRODUCT COVERED BY THIS WARRANTY THIS EXCLUSIVE REMEDY SHALL NOT BE DEEMED TO HAVE FAILED OF ITS ESSENTIAL PURPOSE SO LONG AS SELLER IS WILLING AND ABLE TO REPAIR OR REPLACE DEFECTIVE PARTS IN THE PRESCRIBED MANNER THIS LIMITED WARRANTY MAY NOT BE MODIFIED BY SELLER UNLESS SUCH MODIFICATION OR WAIVER IS IN WRITING EXECUTED BY AN AUTHORIZED OFFICER OF SELLER 52 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 53 O 2014 LACO TECHNOLOGIES INC
27. Log Linear Analog Output LOG LINEAR OUTPUT Output Volts Many InstruTech modules and controllers also provide a log linear output Signal as an alternative to the nonlinear signal described above This output shown at right is a 1 Volt per decade signal that may be easier to _ use for data logging or control The table shown section 22 2 contains the lookup data provides the formulas for converting the log linear output voltage into pressure values Pressure Torr for nitrogen and various other gases 10 107 10 10 40 42 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 22 1 NON LINEAR ANALOG OUTPUT You may calculate the N2 air pressure represented by the 0 375 to 5 659 V non linear analog output voltage for the S curve using a multi segment nth order polynomial function calculation The coefficients for the nth order polynomial equation defined for various pressure measurement ranges are given in the following table For Non Linear Analog Output voltage range of 0 375 to 2 842 volts use this table 000285 008767 4 2 0 1151 0 04158 0 008738 For Non Linear Analog Output voltage range of 2 842 to 4 945 volts use this table _ Coefficients for yC 08986 4 00738 Lo 112 00729 2 For Non Linear Analog Output voltage range of 4 94 to 5 659 volts use this table
28. N2 to other gas is properly used Refer to sections titled Using the Gauge With Different Gases Display and Analog Output for a more complete discussion Do not use this device in an explosive atmosphere or in the presence of flammable gases vapors or fumes Do not use this device to measure the pressure of explosive or combustible gases or gas mixtures The sensor wire in the gauge normally operates at 125 C but if malfunction should occur the wire temperature could exceed the ignition temperature of certain combustible gases and gas mixture This could cause an explosion which could result in serious injury or death 33 O 2014 LACO TECHNOLOGIES INC 18 Mount with this axis horizontal LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS INSTALLATION 18 1 MECHANICAL INSTALLATION Mount the CVM211 as close as possible to the pressure You want to measure Long or restricted small diameter tubing will create a pressure difference between your process chamber and the gauge This may cause a delay in response to pressure changes Mounting the CVM211 too close to a gas source inlet may also cause measurement and control instability Do not mount the CVM211 near a source of heating or cooling such as heaters or air conditioning vents Mount the CVM211 with its main long axis horizontal see diagram at right The CVM211 is calibrated in this orientation Pressure reading errors may occur above 1 Tor
29. NOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 11 2 1 W2V40 DIMENSIONS 293 10 16 230 28 8 06 86e 104 L 10 10 109 Torr 16 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 11 2 3 W2V40 SERVICE CODE DESCRIPTION QTY REMARKS W2V0020 O ring G 45 W4V0022 Oil Seal Viton W2V0021 Oil Seal Iron W4V0027 O ring S 95 W4V0028 O ring G 70 W4V0043 O ring P 6 W4V0044 O ring AN 170 W4V0048 O ring P 5 W4V0068 1st Stage Valve W4V0086 2nd Stage Valve 14 5X7 W4V0079 Distributor Valve dia 45X2 W4V0098 O ring P 6 W4V0094 O ring P 6 W4V0104 Oil Suction Felt W4V0016 O ring S 75 W4V0052 O ring G 45 Common Common Common Common Common Common Common Common Common Common Common Common Common Common Common Common Total minor kit 1st Stage Blade 55X38X6t 1st Stage Blade Spring 0 5X2 5X3 5X45 1st Stage Spring Guide 2 2X3 5X32 2nd Blade Spring Guide 2 2X3 5X32 2nd Stage Blade Spring 0 5X2 5X3 5X45 W4V0034 W4V0035 W4V0036 W4V0037 W4V0038 Major Only Major Only Major Only Major Only Major Only W4V0039 W4V0074 W4V0081 2nd Stage Blade 40X30 5X6t 2nd Valve Spring 0 6X7 2X17 Oil Pump Blade 6X6X21 Total major kit Major Only Major Only Major Only Major and Minor 17 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS
30. VC Vacuum Hose with NW Flanges Table 5 Vacuum Hose Fittings Table 6 Vacuum Gauges Table 7 Vacuum Chamber Fittings and Valves Table 8 Chamber Gaskets Table 9 Clear Vacuum Traps and Replacement Elements LACO recommends to have one gallon of vacuum pump oil and one gallon of flushing fluid along with a spare chamber lid gasket Also silicone vacuum grease is also helpful for lubrication on the lid gasket to ensure quick and easy vacuum Sealing If the chamber is equipped with a filter trap replacement elements are also recommended 9 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Below is a list of various element types available for the clear vacuum traps Table 1 Element Types for Clear Vacuum Types ELEMENT TYPE DESCRIPTION Copper Gauze Large surface area traps condensable particles and oil vapors Stainless Steel Gauze Same as copper but with added corrosion protection Molecular Sieve Reduces mechanical pump backstreaming and traps water vapor Sodasorb Minimizes migration of corrosive chemicals and neutralizes acidic vapors Activated Alumina Removes Lewis acids polar compounds other acids water and particles Polypro 2 Micron Traps high volumes of solids and particulates as small as 2 microns available in three sizes Table 2 Vacuum Pump Oil and Grease DESCRIPTION 1 QUART 1 GALLON 5GALLON 19 Grade Direct Drive VP1x10 Torr LVO191QT LVO191G LVO195G 20 Gra
31. alog or product specifications under the normal use and service for which they are intended The entire warranty obligation of SELLER is for the repair or replacement at SELLER s option of products or parts examination of which shall disclose to SELLER s satisfaction that it is defective returned to SELLER s plant properly identified within twenty four 24 months unless otherwise noted after the date of shipment from InstruTech Plant BUYER must obtain the approval of SELLER and a return authorization number prior to shipment Alteration or removal of serial numbers or other identification marks renders this warranty void The warranty does not apply to products or components which have been abused altered operated outside of the environmental specifications of the product improperly handled or installed or units which have not been operated in accordance with SELLER s instructions Furthermore the warranty does not apply to products that have been contaminated or when the product or part is damaged during the warranty period due to causes other than ordinary wear and tear to the product including but not limited to accidents transportation neglect misuse use of the product for any purpose other than that for which it was designed THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE THIS WARRANTY EXTENDS ON
32. ased on regular use of LVO19 vacuum fluid WARNING Ifthe pump as been used on corrosive toxic or volatile chemicals observe proper safety precautions before removing the drain plug CAUTION Hydrocarbon pump fluid should be changed at the following times 1 Aftera 100 hour break in period of pump operation 2 When the pump fluid becomes contaminated or is discolored 3 When condensation in the pump fluid is present 4 Before and after the pump has been stored for a long period of time 5 Perflouropolyether fluid should be reconditioned when it becomes contaminated NOTE Always change the pump fluid while the pump is warm to prevent condensable vapors such as water from remaining in the pump 14 1 6 CHANGING THE PUMP FLUID 1 Turn the pump off and drain the fluid from the pump Use your fingers to remove the oil fill cap and the oil drain plug from the pump allow the fluid to drain into a suitable container If the fluid fill cap or fluid drain cap cannot be loosened with your fingers cover them with a cloth and use pliers 2 Afterthe oil flow diminishes switch ON the pump and allow it to run for about 10 seconds and then switch if OFF 23 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 3 4 If the fluid drained from the pump is discolored contains particulate has a foul odor or is very dirty flush out the pump using the procedure below until the drained fluid is clea
33. c explosive pyrophoric highly corrosive or other hazardous process gases including greater than atmospheric concentrations of oxygen contact LACO Technologies for specific recommendations WARNING Ground the motor properly during installation Disconnect the power before beginning installation maintenance or repair work or before interchanging the input leads when correcting the direction of rotation Disconnecting the power also avoids an unexpected start up for pumps with automatically resetting thermal overloads WARNING If hazardous gasses or vapors are expelled from the pump do not operate the pump without an exhaust line and an adequate exhaust system WARNING not exceed a maximum backpressure of 7 psig Excessive pressure in the pump could damage the seals blow out the sight glass or rupture the pump housing In addition excessive backpressure can result in hazardous process gas or contaminated oil leaking out of the pump WARNING Don t install an exhaust line with a smaller ID than the exhaust port or allow restrictions or deposit build up in the exhaust line 13 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS WARNING WARNING CAUTION If you are purging the oil casing with inert gas limit the inert gas flow to avoid exceeding the 7 psig limit Accidentally connecting the pump s exhaust port to a vacuum line containing a closed valve also causes a dangerous
34. cal pump temperatures is over 100 Torr Even small amounts of water in the pump fluid will have a big effect on pump performance The gas ballast control button allows a quantity of air to be injected into the second stage of the pump during compression to reduce the partial pressure of the pumped gas below its saturated vapor pressure and thus prevent condensation At the end of compression the pressure in the discharge chamber is greater than atmospheric The saturated vapor pressure of pump fluid and the condensed vapors such as water is higher when it is hot than when it is cold therefore it is necessary to wait until the pump reaches its operating temperature before pumping condensable vapor Using the gas ballast increases the ultimate pressure the pump can achieve 22 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 14 MAINTENANCE 14 1 PREVENTATIVE MAINTENANCE 14 1 5 PUMP FLUID Every vacuum pump is designed to work best with a specific pump fluid and the fluid is an active part of the pumping mechanism For best performance care must be used to select fluid with the physical and chemical properties engineered for the pump For LACO pumps the ideal fluid for general purpose pumping is LACO s LVO19 vacuum fluid This is a moderately priced fluid that is engineered to give the best vacuum and longest life in LACO pumps Other fluids may give good performance but our specifications are b
35. d N2 are considered the same with respect to thermal conductivity but even N2 and air will exhibit slight differences in readings at higher pressures For example when venting a system to atmosphere using N2 you may see readings change by 30 to 40 Torr after the chamber is opened and air gradually displaces the N2 in the gauge For most other gases the effect is much more significant and may result in a hazardous condition as described below Other considerations when using gases other than N2 air FLAMMABLE OR EXPLOSIVE GASES WARNING InstruTech convection gauges are neither intrinsically safe nor explosion proof and are not intended for use in the presence of flammable or explosive gases or vapors Under normal conditions the voltages and currents in InstruTech convection gauges are too low to cause ignition of flammable gases However under certain failure conditions sufficient energy could be 39 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS generated to cause flammable vapors or gases to ignite or explode Thermal conductivity gauges like the InstruTech convection gauges are not recommended for use with flammable or explosive gases Convection Vacuum Gauge Indicated vs True Total Pressure Test Gases N2 Ar He 1000 4 Ar 100 4 1 P d N True Total Pressure Torr capacitance manometer 0 001 0 0001 0 001 0 01 0 1 1 10 100 1000
36. de High Quality VP 1x10 Torr 2010 LVO201G LVO205G Flushing Fluid All Pumps Low N A LVOFF1G LVOFF5G Viscosity Silicone Vacuum Grease LVO9140Z 4 oz Jar Table 3 Oil Mist Eliminators P N DESCRIPTION SPARE ELEMENTS LOME20025 Compact NW25 In 1 2 Outlet 10 cfm LGL915 LOME60025 15 cfm Clear Housing Oil Mist Eliminator LGL150 NW25 LOME30050 5 cfm Compact Oil Mist Eliminator 1 2 NPT Table 4 PVC Vacuum Hose with NW Flanges P N SIZE LVFP100N25 LMSA0953 1 2 LD LMSA0955 10 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS P N SIZE LVFP038 3 8 I D LVFPO50 1 2 LD LVFP100 Table 5 Vacuum Hose Fittings P N DESCRIPTION Table 6 Vacuum Gauges DESCRIPTION LVG 3025B 0 30 in HG Vacuum Gauge SS Case 1 4 NPT Bottom Mount LVG 3025B 0 30 in HG Vacuum Gauge SS Case 1 4 NPT Rear Mount LVG 200TC Digital Thermocouple Display Sensor amp Cable CVM211 Instrutech Stinger Convection Vacuum Gauge Module Table 7 Vacuum Chamber Fittings and Valves P N DESCRIPTION 3 4 MNPT Adaptor to NW25 SS 3 4 FNPT Ball Valve 1 4 NPT Bronze Muffler Table 8 Chamber Gaskets CHAMBER BUNA LID GASKETS Chamber Diameter 11 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Table 9 Clear Vacuum Traps and Replacement Elements P N DESCRIPTION MV300100 MV300105 MV300200 MV30
37. e sensor Since different gases and mixtures have different thermal conductivities the indicated pressure readings and outputs will also be different InstruTech convection gauges and most other thermal conductivity gauges are calibrated using nitrogen N2 When a gas other than N2 air is used correction must be made for the difference in thermal conductivity between nitrogen N2 and the gas in use The charts and tables on the following pages indicate how different gases affect the display and output from an InstruTech convection gauge WARNING Using a thermal conductivity gauge with gases other than that for which it is calibrated could result in death or serious injury Be sure to use gas correction data in this manual when measuring pressures of gases other than 2 air For N2 the calibration shows excellent agreement between indicated and true pressure throughout the range from 10 to 1000 Torr At pressures below 1 Torr the calibration curves for the different gases are similar The difference in readings at these low pressures is a constant a function of the difference between thermal conductivities of the gases At pressures above 1 Torr indicated pressure readings may diverge significantly At these higher pressures convection currents in the gauge become the predominant cause of heat loss from the sensor and calibration depends on gauge tube geometry and mounting position as well as gas properties Generally air an
38. eckthe packing list to see if the missing item s are on back order 3 Carefully check the packing material and container to ensure the missing item s were not overlooked 4 If you cannot find the item s please notify LACO Technologies immediately 12 3 REPORTING INCORRECT SHIPMENT If the item received is not the item ordered contact LACO Technologies immediately 19 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 12 4 INITIAL FILLING WITH VACUUM PUMP FLUID All our rotary vane vacuum pumps are shipped with a full change of vacuum pump fluid Always be sure that the oil level is approximately in the middle of the low and high level marks in the sight glass and please note that upon start up of the pump the oil level in the sight glass will drop slightly 12 5 CONNECTING THE PUMP TO THE SYSTEM Clamps and centering rings are supplied for the intake and exhaust ports of the pump CAUTION not connect power to your pump until the blank off plate is removed from the exhaust port Operating the pump with the blank off in place will damage the pump and can injure the operator All connections must be vacuum tight for your pump to achieve its ultimate pressure The O ring on the centering ring must be clean to avoid leaks Be sure that all quick release clamps are in place and properly tightened Connect The Pump To The System As Follows 1 Setthe pump on an even horizontal s
39. ectrical or physical hazards which if precautions are not taken could result in death or serious injury property damage or economic loss CAUTION Identifies information about practices or circumstances that can cause electrical or physical hazards which if precautions are not taken could result in minor or moderate injury property damage or economic loss NOTICE Identifies information that is critical for successful application and understanding of the product Labels may be located on or inside the device to alert people that dangerous voltages may be present 26 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 16 2 DESCRIPTION Thermal conductivity gauges measure pressure indirectly by sensing the loss of heat from a sensor to the surrounding gases The higher the pressure of the surrounding gas the more heat is conducted away from the sensor Pirani thermal conductivity gauges maintain a sensor usually a wire at some constant temperature and measure the current or power required to maintain that temperature A standard Pirani gauge has a useful measuring range of about 10 Torr 10 Torr By taking advantage of convection currents that are generated above 1 Torr convection enhanced Pirani gauges increase the measuring range to just above atmosphere The InstruTech CVM211 Stinger module provides the basic signal conditioning required to turn a convection vacuum gauge
40. ester Resin e Plastasols Casting Plaster e Polysulphide Rubber e Polyurethane Resin Adhesive Mixes Epoxy Resins Investment Plaster 6 2 INTRODUCTION When any of the above listed materials are mixed with the required additives accelerator filler etc then air bubbles can become trapped within the mixture If not removed before the material cures the air bubbles can cause defects such as nodules cavities hollows in the finished cast Sometimes such defects remain out of sight just below the surface only to appear after a period of use With electrical and electronic encapsulation then these cavities can give rise to electrical breakdown On art figures cavities or nodules require correcting which increases the time and costs for a piece 5 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Mixing can be done by hand or an electric mixer before degassing depending upon the quantities involved It depends on the amount and type of filler and resin The components are mixed in a container It is essential that the resulting mixture behaves as a liquid i e flows and can be poured When this mixture is put into the vacuum chamber and the air pressure above it reduced i e evacuated the air bubbles which were formed at atmospheric pressure now expand and rise to the surface where they burst The air thus released is pumped away In practice degassing causes the whole mixture to expa
41. excessive pressure Hazardous process gases can concentrate in the vacuum pump its oil and its filters If the pump has been used on toxic explosive pyrophoric corrosive volatile or other hazardous substances take the proper safety precautions before opening the pump or filters Proper precautions could include inert gas purging before and after you drain the oil sweeping hazardous gas from the pump or filters wearing gloves or protective clothing to avoid skin contact with toxic or highly corrosive substances using a ventilated work area employing fume hoods wearing safety masks using a breathing apparatus LACO rotary vane vacuum pumps are two stage units designed to operate continuously in the low torr amp sub torr millitorr pressure range 10 mmHg Operation for prolonged periods of time above 10 mm HG Torr can result in permanent damage to the pump 14 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 11 SPECIFICATIONS 11 1 BASIC PARTS AND SPECIFICATIONS Intake Gas Ballast Terminal Box Outlet Oil Filling Plug Oil Level Window 4 Oil Drain Plug 11 2 W2V40 SPECIFICATIONS COMPONENT DESCRIPTION Ultimate Pressure Gas Ballast Open Ultimate Pressure Gas Ballast Closed 1700 rpm 1500 cc 1 5 quart Net 70 lbs shipping 75 lbs NW 25 26 mm O D tube 70 to 40 C 45 to 104 F 15 2014 LACO TECH
42. foul smelling change it immediately Any degassed solvents water or other liquids will condense in the pump oil and lower the vacuum level the pump is able to achieve Frequent oil changes will also extend the life of the vacuum pump When changing pump oil it is recommended to also use a flushing fluid to cleanse the pump LACO s LVOFF is a hydrocarbon fluid specifically designed to assist in the internal cleaning of particles and sludge build up in mechanical vacuum pumps Its low viscosity helps free contamination from internal parts allowing it to be flushed from the pump through the drain valve 4 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 6 APPENDIX A REMOVAL OF AIR FROM LIQUIDS 5 2 FLUSHING PROCEDURE 1 Drain the used fluid from the pump while still hot from operation and refill with LVOFF 2 Run the pump blanked off or isolated for approximately 20 30 minutes or until pump is hot 3 Drain the pump completely open gas ballast and jog the pump to aid in removing oil 4 Repeat the procedure if necessary then refill with LACO 19 grade oil for direct drive pumps of 195 grade for belt drive pumps or other oil as specified WARNING Any foreign material left remaining the vacuum chamber or vacuum hose lines can contribute to outgassing and reduce the performance of the system and the vacuum pump 6 1 APPLICATIONS RTV Silicone Rubber Araldite Poly
43. he set motor and pump screws 25 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 16 APPENDIX E INSTRUTECH STINGER CONVECTION VACUUM GAUGE MODULE USER MANUAL 16 1 USER INFORMATION There are operational characteristic differences between solid state equipment and electromechanical equipment Because of these differences and because there are a variety of uses for solid state equipment all persons that apply this equipment must take every precaution and satisfy themselves that the intended application of this equipment is safe and used in an acceptable manner In no event will InstruTech Inc be responsible or liable for indirect or consequential damages that result from the use or application of this equipment Any examples or diagrams included in this manual are provided solely for illustrative purposes Because of the many variables and requirements imposed on any particular installation InstruTech Inc cannot assume responsibility or liability for any actual use based on the examples and diagrams No patent liability is assumed by InstruTech Inc with respect to use of information circuits equipment or software described in this manual Throughout this manual we use notes notices and apply internationally recognized symbols and safety messages to make you aware of safety considerations WARNING Identifies information about practices or circumstances that can cause el
44. imple 900 elbow may help prevent or reduce the transport of particles from entering your vacuum gauge In the event of gauge contamination please contact the factory to return the gauge for possible cleaning if the gauge has not been exposed to hazardous materials 50 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 23 5 MODULE AND SENSOR REPLACEMENT The CVM211 module is factory calibrated for the specific sensor gauge tube installed in it If the device fails for any reason return the CVM211 to the factory to determine if either the sensor or the electronics could be replaced or if the entire module should be replaced 24 FACTORY SERVICE AND SUPPORT 25 WARRANTY If you need help setting up operating troubleshooting or obtaining a return materials authorization number RMA number to return the module for diagnosis please contact us during normal business hours 8 00am to 5 00pm Mountain time Monday through Friday at 303 651 0551 Or e mail us at support instrutechinc com For the safety of our employees you must down load a material disclosure form from our website at www instrutechinc com Please use this form to provide a history of the gauge detailing what gases have been used We cannot work on gauges that have been exposed to hazardous materials SELLER warrants that its products are free of defects in workmanship and material and fit for the uses set forth in SELLER s cat
45. install an isolation valve or pressure relief device to protect the gauge tube from overpressure conditions With some fittings actual safe overpressure conditions may be lower for example a quick connect O ring compression fitting may forcibly release the gauge tube from the vacuum chamber fitting with only a few psi over local uncorrected barometric atmospheric pressure CAUTION If the internal pressure of a vacuum gauge device is allowed to increase above local uncorrected barometric pressure atmospheric pressure side vacuum fittings may release and possible overpressure conditions may cause leaks that would allow the gas inside the gauge tube to release into the atmosphere of the surrounding environment Toxic pyrophoric and flammable gases are examples of hazardous gases that if allowed to leak out of the vacuum pressure containment vessel into the atmospheric environment could cause bodily injury and possible damage to equipment Never expose the gauge tube internal volume to pressure above local atmospheric pressure when using hazardous gases 17 5 GASES OTHER THAN NITROGEN AIR WARNING WARNING Do not attempt to use with gases other than nitrogen N2 or air without referring to correction factor data tables InstruTech gauges and modules are calibrated for direct readout of nitrogen or air Do not attempt to use with other gases such as argon Ar or carbon dioxide CO2 unless accurate conversion data for
46. iquid feedthroughs and valves Degassing of a liquid mixture is the removal of air bubbles which become entrapped in the mixture when mixing the components See Appendix A for a complete discussion on vacuum degassing The following is a quick review of procedures for removal of air bubbles from resin mixes RTV silicone and similar liquids 1 Close the vacuum valve connected to the vacuum pump and switch the vacuum pump ON and allow to warm up Open the vacuum release or vent valve and remove the chamber lid Mix the materials to be degassed in a suitable container not more that 1 3 to 1 2 full and place this container in the chamber Replace the lid making sure it fully covers the gasket on the vacuum chamber Close the vacuum release valve Open the vacuum valve Watch the mixture and the vacuum gauge When the chamber is undergoing the evacuation the mixture will begin to rise slowly at first At nearly full vacuum the mixture will have swollen up to fill the mixing vessel air bubbles will appear and burst at the mixture surface After a few seconds this mixture will collapse to near its original volume Occasional bubbles will appear at the surface If the mixture rises too fast and is likely to overflow the container then momentarily reduce the vacuum by opening and closing the vacuum release valve or closing the vacuum valve Repeat if necessary Wait for about 30 seconds after the collapse and close the vacuum valve
47. is stored in a horizontal position with the intake and exhaust ports facing up When putting a pump into storage put a pin hole in both the intake and exhaust port caps 24 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 14 3 AVOIDING OIL LEAKS DURING SHIPPING AND STORAGE Always drain your vacuum pump of all fluids before shipping Failure to do so can result in damaged shipping containers and delays by freight carriers due to possibility of the presence of hazardous materials in the event of a spill 15 TROUBLESHOOTING SYMPTOM CHECK SOLUTION NOISY MOTOR Power line voltage and Correct voltage or connections WILL NOT TURN connections Any foreign materials Remove the foreign materials If inside the pump problem is with oil change oil Motor open internal Replace open windings circuit NOISY AND Any foreign materials Remove foreign materials HOT PUMP inside the exhaust valve Power line voltage and Fix the leakage connections If leakage valve is open Close the valve All the valves in the Close if found open vacuum line VACUUM LEVEL level Add oil DECLINES Leakage on the device Close the intake and recheck connected Moisture content of oil Change oil Oil regulator Replace If gas ballast is open Close the gas ballast MOTOR RUNS Worn out coupling Replace coupling BUT NOT PUMP Mechanism Worn out key between Replace the key and t
48. ixing during the degassing process while under vacuum will soeed the removal of air VACUUM PUMP SIZE The size or pumping speed of your vacuum pump usually noted in terms of cubic feet per minute or cfm as well as the ultimate pressure or vacuum level your pump can achieve CHAMBER SIZE AND PIPING Chamber size and the diameter and length of the vacuum hose can also effect the time for removal of gases It is recommended to use at least the same diameter as your pump inlet and to use the shortest length hose as possible 6 5 MIXING UNDER VACUUM Some materials need to be mixed under vacuum in order to obtain an air free material Some materials may also need heating before or during mixing Such material may need constant agitation or vibration to keep them fluid so that they will actually flow as fluids to fill moulds and containers In such cases LACO can review the application and recommend suitable vacuum equipment 7 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 6 6 COMPLETION OF PROCESS BY PRESSURE After subjecting the liquid material to a vacuum to remove entrapped air the voids and spaces are probably still present but in vacuum The final stage of the process is to release the vacuum in the chamber i e admit the atmosphere which exerts a pressure of about 14 7 pounds on every square inch It is this pressure that pushes the material into the voids undercuts and crevices of the
49. l conductors are maintained at earth ground potential This applies to all products that come in contact with the gas contained in vacuum chambers An electrical discharge within a gaseous environment may couple dangerous high voltage directly to any ungrounded conductor of electricity A person could be seriously injured or killed by coming in contact with an exposed ungrounded electrical conductor at high voltage potential This condition applies to all products that may come in contact with the gas inside the vacuum chamber vacuum pressure containment vessel 31 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 17 3 7 PROPER EQUIPMENT GROUNDING WARNING Hazardous voltages that could seriously injure or cause death are present in many vacuum processes Verify that the vacuum port on which the CVM211 vacuum gauge module is mounted is electrically grounded Consult a qualified Electrician if you are in doubt about your equipment grounding Proper grounding of your equipment is essential for safety as well as intended operation of the equipment The CVM211 module vacuum gauge must be connected directly to a good quality earth ground Use a ground lug on the CVM211 gauge vacuum connection flange if necessary WARNING In order to protect personnel from electric shock and bodily harm shield all conductors which are subject to potential high voltage electrical discharges in or around the vacuu
50. lvageable Sensors that fail due to condensation coatings or particles may possibly be restored by cleaning A Reactive Gases If process gases react with the materials of construction of the sensor the result is corrosion and disintegration of the sensor over time The chemistry of the gases used for plasma etching and other reactive semiconductor processes are examples where this failure mode is possible In this case cleaning can t solve the problem because the sensor has been destroyed The sensor or module must be replaced If you experience this failure mode quickly or frequently you should consider a different vacuum gauge for your application Thermal vacuum gauges may be available with different sensor materials that are not as reactive with your particular process gases The standard gold plated tungsten sensor used in the InstruTech convection gauge is offered for use with air and inert gases such as N2 argon etc InstruTech also offers platinum sensors for applications not compatible with gold plated tungsten There is no material that is universally chemical resistant your choice of vacuum gauge as well as all other vacuum components should take into consideration the potential reactions between your process gases and the materials of construction Consider what effect water vapor will have when combined with your process gases because a finite amount of water will enter the chamber during venting to atmosphere with air
51. m system 17 3 8 ELECTRICAL INTERFACE AND CONTROL It is the user s responsibility to ensure that the electrical signals from this product and any connections made to external devices for example relays and solenoids are used in a safe manner Always double check the system set up before using any signals to automate your process Perform a hazardous operation analysis of your system design and ensure safeguards and personnel safety measures are taken to prevent injury and property damage 17 4 OVERPRESSURE AND USE WITH HAZARDOUS GASES WARNING Install suitable protective devices that will limit the level of pressure inside your vacuum chamber to less than what the vacuum chamber system components are capable of withstanding InstruTech gauges should not be used at pressures exceeding 1000 Torr absolute pressure In cases where an equipment failure could cause a hazardous condition always implement fail safe system operation For example use a pressure relief device in an automatic backfill operation where a malfunction could result in high internal pressures if the pressure relief device was not installed on the chamber The CVM211 vacuum gauge module is not intended for use at pressures above 20 psia 1000 torr DO NOT exceed 35 psig lt 2 bars pressure inside the sensor If your chamber goes to higher pressures you should 32 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS
52. n If your pump requires more than 2 flushes a foreline trap or oil filtration unit should be installed on the pump Contact our company for more information on foreline traps and oil filtration units a Reinstall the fluid drain plug with flat gasket into the fluid drain port b Refill the pump with LVOFF vacuum pump fluid until the fluid level is visible in the lower rim of the fluid sight glass c Blank off on valve off the inlet port d Turn ON the pump and allow it to run for about 10 minutes e Turn the pump OFF and refer to step 1 to drain the vacuum fluid Charge the pump with fluid as follows a Reinstall the fluid drain plug with flat gasket into the fluid port b Remove the fluid fill cap and fill the pump to capacity with LVO10 vacuum pump fluid Using other than LVO19 vacuum pump fluid may result in damage to the pump or compromise the pump per formance and lifetime Reinstall the fluid fill cap with flat gasket 14 2 LONG TERM STORAGE 2 WEEKS OR LONGER Before placing a pump in long term storage follow the procedure below 1 2 Drain all fluids from the pump as described in the previous section Refill the pump with clean LVO19 or LVOFF vacuum fluid as described in the section for changing the pump fluid Always cover both the intake and exhaust ports with caps to keep any dust or foreign materials from entering the pump Place pump in original container if available Be sure that the pump
53. n inlet vacuum trap In addition a pump specially prepared for perflouropolyether vacuum fluid is required when pumping highly reactive or extremely corrosive gas Contact us for recommendations 2 Periodically check the vacuum fluid level in the sight glass to be sure it is between the low and high levels If you are operating the pump with the gas ballast open it will be necessary to check the oil level more frequently 3 Ifthe vacuum fluid within the pump becomes discolored or contaminated change the fluid as soon as possible Operating the pump with contaminated or dirty oil will greatly reduce the life expectancy of the pump and may lead to the cancellation of the warranty 13 3 ANTISUCKBACK If the pump stops with the inlet under vacuum the antisuckback system will stop air or oil leakage inside the module or into the vacuum chamber The vacuum integrity is guaranteed by Quality of machining from surfaces between the functional elements stator plates housing etc The exhaust valves on the exhaust orifice A spring valve automatically closes the oil injection canal in the pump When the pump stops the oil pump exhaust pressure is decreased and a spring activated valve closes the oil injection canal 13 4 GAS BALLAST When condensable vapors such as water vapor are being pumped the gas is compressed beyond its saturated pressure and can condense impairing pump performance The vapor pressure of water at typi
54. nd about two to six times its original volume As the bubbles burst at the surface the expansion decreases This process can take up to several minutes depending upon the nature of the mixture the volume of the vacuum chamber and the speed of the vacuum pump used After expansion has subsided bubbles can still appear at the surface which is mainly caused by the escape of traces of remaining air plus volatile components of the mixture boiling off The vacuum should only be held for a further 30 seconds to 60 seconds at this stage otherwise the composition of the mixture will be altered and setting time will change due to volatile components being removed by the vacuum This degassed mixture is then poured into your mold taking care to minimize any trapped air When your mold has been filled if you desire you can put the whole mold with mixture into the vacuum chamber and evacuate as before This time only one or two bubbles should appear from air which was trapped in undercuts or adhering to the mould surface Again beware of boiling off the volatile components only a few seconds or so at full vacuum should be sufficient You should be able to complete the above process long before the material begins to gel or increase in viscosity If degassing is too slow you may need to either increase the evacuation speed i e change the pump to a larger cfm or the decrease chamber size to reduce the pump down time or decrease the accelerator or p
55. ng the process cycle or during the venting cycle The result is interference with heat removal from the sensor In this case cleaning may be able to remove particles from the gauge However particulate contamination is the most difficult to remove as particles can become stubbornly trapped inside the gauge In some processes solid particles are created during the process throughout the chamber including inside the gauge Particles tend to form on cooler surfaces such as in a gauge at room temperature You may slow down the build up of particles in the gauge by keeping the gauge warm within specified limits during the process cycle Particles in the process chamber may be swept into the gauge during the vent cycle The CVM211 has a screen built into the gauge port to help keep the largest particles out of the gauge In very dirty applications or where particles are small enough to get through the screen an additional filter installed on the inlet may help prolong the gauge life In some vacuum processes desorbed and sputtered materials from the process may enter vacuum components connected to the process vacuum chamber by line of sight transport especially under high vacuum conditions i e in the molecular flow regime To prevent materials that may be transported via line of sight momentum from entering your vacuum gauge or other components it is advisable to install some form of apparatus that will block the line of sight In many cases a s
56. ossibly keep the components warm in very cold weather 6 3 COMMON CAUSES OF BUBBLES IN CASTINGS Air inclusion during mixing the resin and hardener together Air trapped moulds Air trapped due to improper casting moulding techniques Air introduced by suction as the material shrinks or due to a leaking tool Trapped residual solvent vapors from certain types of mould releases 6 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Volatile components being stripped out of the materials while casting under vacuum Gases generated during the reaction hardening process Gases formed during improper storage moisture contamination etc Gases introduced through pressurized systems Air from improperly degassed resin and or hardener 6 4 FACTORS THAT AFFECT THE REMOVAL OF GASES VISCOSITY OF THE MIX The higher the viscosity the more difficult it is to remove gases SURFACE TENSION OF THE MATERIALS Can be reduced by heating and the addition of surfectants TEMPERATURE OF THE MIX Heating the material will reduce the viscosity Be sure to consider the pot life and gel time before heating any mixed materials AMOUNT OF MATERIAL BEING DEGASSED AT TIME The depth to surface ratio is important The larger the surface that is exposed to the vacuum the better The lower the amount of product the rising bubbles have to travel through the better AGITATION Agitation m
57. point all user settings will be replaced by the original factory default values and the display will return to the normal pressure display If you release the up key before 5 seconds has passed the display will return to normal pressure display without resetting to factory defaults 27 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 19 4 USER INTERFACE MAP Normal pressure display To enter setup mode press and hold lt select gt for 3 seconds Readout displays value of setpoint turn on pressure Relay energizes when pressure is below this value Factory default 100 mTorr To keep this value and go to next To change this value use lt up gt lt down gt keys Then step press lt select gt press lt select gt to save and go to next step Readout displays value of setpoint turn off pressure Relay de energizes when pressure is above this value Factory default 200 mTorr l l l l l I I l l l To keep this value and proceed to To change this value use up down keys Then next step press select press select to save and go to next step I l I l l l l Readout displays 000 to indicate unit is in zero adjust mode Factory default 000 mTorr 4 Is system evacuated to a
58. r if the unit is not mounted horizontally Below 1 Torr mounting position has little to no effect Mount the CVM211 with port down if possible to help minimize the effect of any particles or condensation from collecting in the gauge Do not mount the CVM211 where it will be subjected to excessive vibration Vibrations may cause unstable readings measurement errors and possible mechanical stress to components in the CVM211 Flanges Fittings follow the manufacturer s recommendations and note the following NPT fittings When connecting the device using a NPT fitting apply a thread sealant compound or wrap the threaded portion of the tubing with one and a half to two wraps of pipe thread seal tape such as PTFE Teflon tape and hand tighten the gauge into the gauge port Do not use a wrench or other tool which may damage the gauge 18 2 ELECTRICAL INSTALLATION 18 2 9 GROUNDING Be sure the vacuum gauge and the rest of your vacuum system are properly grounded to protect personnel from shock and injury Be aware that some vacuum fittings especially those with O rings when not used with metal clamps may not produce a good electrical connection between the gauge and the chamber it is connected to 34 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 18 2 10 ELECTRICAL CONNECTIONS A good recommended practice is to remove power from any cable prior to connecting or disconnecting it
59. se dry pumps have pumping speeds or cfm values ranging from 1 to 7 cfm For higher vacuum levels and cfm values oil sealed rotary vane vacuum pumps are used Single stage models are capable of vacuum down to 0 5 Torr and cfm from 1 to 100 cfm Two stage models are capable of vacuum down to 0 005 Torr or 5 millitorr and range in cfm from 2 to 50 cfm When selecting a pump it is necessary fully degas the mixture before it even begins to gel or set Knowing the pot life of the material will help in selecting the right speed or cfm of pump The manufacturer of the material may recommend a vacuum level based on the properties of the material If you are unsure of the vacuum level requirement it is always easier to have more vacuum than less 3 3 COMMON ACCESSORIES e Vacuum traps protect the vacuum pump from contaminates during the degassing process and also prevent backstreaming of pump oil into the vacuum lines or chamber Digital vacuum gauges with units in torr or millitorr to accurately monitor and repeat the process at the same vacuum level Chamber mixers with rotary shaft feedthroughs 2 2014 LACO TECHNOLOGIES INC 4 BASIC OPERATION LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Chamber internal platen heaters Heating blankets can be fitted around the vacuum chamber to achieve higher wall temperatures Heaters are NOT suitable for use with clear acrylic doors Electrical and thermocouple feedthroughs L
60. sehold cleaner Formula 409 household cleaner Glass Plus cleaner Mr Clean household cleaner Top Job household cleaner and Windex window cleaner It is not recommended to use abrasive cleaners 72 POLISHING Protect acrylic and maintain its surface gloss by occasional polishing with a good plastic cleaner and polish Apply a thin even coat with a soft clean cloth and polish slightly with cotton flannel Then wipe with a damp cloth to help eliminate electrostatic charges that can attract dust particles 8 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 7 9 REMOVING SCRATCHES Fine scratches can be removed by hand polishing Apply a plastic scratch remover to a soft flannel pad and rub When the scratches have disappeared remove all residue and polish For deeper scratches first sand lightly with a 400 grit wet or dry sandpaper using plenty of water and rinsing the sandpaper frequently Follow by buffing with a clean muslin wheel and a good polishing compound For the highest gloss use a clean up wheel made of soft cotton or flannel sections and on which no compound is used An electric drill with a buffing wheel is ideal 8 APPENDIX C SPARE PARTS AND ACCESSORIES For information on recommended spare parts and accessories see the following tables Table 1 Element Types for Clear Vacuum Types Table 2 Vacuum Pump Oil and Grease Table 3 Oil Mist Eliminators Table 4 P
61. splay auto ranges between Torr and mTorr at 1 Torr O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS Examples 1 Gas used is nitrogen 2 Display shows pressure measurement of 10 Torr True pressure of nitrogen is 10 Torr 2 Gas used is argon Ar Display shows pressure measurement of 600 mTorr True pressure of argon is 1 Torr 3 Gasusedis oxygen O2 Display shows pressure measurement of 486 mTorr True pressure of oxygen is 500 mTorr 22 ANALOG OUTPUT The CVM211 is provided with either a non linear or a log linear analog output Non Linear Analog Output NON LINEAR OUTPUT Output Volts The first Convectron gauge controllers produced a non linear output signal of 0 375 to 5 659 Vdc for 0 to 1000 Torr of N2 roughly in the shape of an S curve as shown at right Granville Phillips adopted the same output curve for most of their Mini Convectron modules and controllers with non linear output although in recent years some Granville Phillips controllers may output variations of the original Scurve The non linear output from InstruTech convection gauges modules and controllers duplicates the original S curve of 0 375 to 5 659 Vdc for 0 to 103 102 107 10 10 102 105 1000 Torr Pressure Torr The table shown in section 22 1 contains the lookup data for converting the non linear output voltage into pressure values for nitrogen and various other gases
62. ture Broad Calibration Range All Vacuum Gauge Types Fast Delivery e Responsive Technical Support Staff Accredited A2LA Accredited calibration lab with compliance to ISO IEC 17025 2005 and ANSI NCSL Z540 1 1994 Also complies with ISO 9001 quality standard TO ORDER Contact the LACO calibration department at 801 486 1004 or via email at calibrations lacotech com for instructions on how to submit your gauge or leak standard for service 47 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 23 2 MAINTENANCE In general maintenance is not required for your InstruTech module Periodic performance checks may be done by comparing the gauge to a known reference standard 23 3 TROUBLESHOOTING Table 13 Troubleshooting INDICATION DISPLAY IS OFF BLANK READINGS APPEAR VERY DIFFERENT FROM EXPECTED PRESSURE READINGS ARE NOISY OR ERRATIC GAUGE CANNOT BE CALIBRATED ZERO AND SPAN CAN T BE ADJUSTED POSSIBLE CAUSE The process gas is different from the gas used to calibrate the CVM211 Module has not been calibrated or has been calibrated incorrectly Loose cables or connections Contamination e Vibration Contamination Sensor failure for other cause POSSIBLE SOLUTION Correct readings for different gas thermal conductivity See section 5 on using the gauge with different gases Check that zero and span are adj
63. urface It need not be perma nently mounted on the surface CAUTION Failure to remove the exhaust port cover before starting the pump could result in damage to the pump WARNING Ensure that your vacuum line is connected to the pump s intake port and not to the exhaust port If your vacuum line has a closed valve accidentally connecting it to the pumps exhaust port causes a dangerous overpressure NOTE Ideally the inside diameter of the vacuum line should be the same size or larger than the ID of the intake port If the vacuum line is too narrow it will reduce the pumping speed WARNING Donotinstall an exhaust line with a smaller ID than the exhaust port Restrictions reduce the pumping speed and could damage the oil seals or cause dangerous overpressure in the pump 20 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 13 BASIC OPERATION If possible install the exhaust line at a slightly descending angle to pre vent condensate from flowing back into the pump and contaminating the pump s vacuum fluid If the exhaust line must be installed in the ascending position and the process gas contains high levels of condensable vapors connect a condensate trap to the exhaust port Condensate traps serve to collect the condensates from saturated vapors Contact LACO Technologies for more information on the correct trap for your pump If no exhaust line is connected and your pump will be
64. usted correctly e Check and tighten connections e Inspect gauge for signs of contamination such as particles deposits discoloration on gauge inlet Return to factory for possible cleaning Ensure gauge is not mounted where excessive vibration is present e Return to factory for possible cleaning e Return to factory for evaluation SETPOINT DOES NOT Incorrect setup Check setpoint setup ACTUATE DISPLAY SHOWS BAD Sensor wire damaged Return to factory for evaluation ATMOSPHERIC PRESSURE READS TOO HIGH AND CAN T BE SETTO CORRECT VALUE ATMOSPHERIC PRESSURE READS TOO LOW AND CAN T BE SET TO CORRECT VALUE Contamination Sensor wire damaged Sensor wire damaged Contamination e Return to factory for possible cleaning e Return to factory for evaluation e Return to factory for evaluation e Return to factory for possible cleaning 48 O 2014 LACO TECHNOLOGIES INC LACO USER MANUAL VACUUM DEGASSING CHAMBERS AND SYSTEMS 23 4 CONTAMINATION The most common cause of all vacuum gauge failures is contamination of the sensor Noisy or erratic readings the inability to set zero or atmosphere and total gauge failure are all possible indications of gauge contamination Contamination can be generally characterized as either A a reaction of process gases with sensor elements or B an accumulation of material on the sensor elements Sensors that fail due to chemical reaction are generally not sa
65. vel This manual also includes product information for degassing systems including accessories options and Spare parts 1 1 MAKEUP OF A DEGASSING SYSTEM A typical vacuum degassing systems includes a vacuum chamber connected to a vacuum pump for removing trapped gases from compounds With the appropriate vacuum pump degas chambers are used to reduce the pressure above the surface of the material and permit escape and subsequent removal of entrapped air and other gases that could induce failure of the final product Degas chambers and pumps are available with several options and accessories for a complete vacuum degas system to meet your requirements 2 1 VACUUM PUMP SAFETY A complete manual will be provided for the vacuum pump and should be referred to for safety issues relating to the specific vacuum pump purchased 2 2 VACUUM CHAMBER SAFETY All degassing chambers are designed for holding full vacuum but any defects cracks or severe wear should be reported to LACO for advisement Vacuum chambers are not designed for pressure applications If slight pressure is needed 5 psi or less the chamber must be provided with necessary clamps and pressure safety relief valves A vacuum degassing system comprises of two main items a vacuum chamber and vacuum pump Several accessories and options can be added to customize the degassing system Systems are available in modular configurations or as complete setups mounted onto carts or stands

USER MANUAL - LACO Technologies, Inc.

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