MG-101 - GE Measurement & Control
Contents
1. Setup ES 13 blow ED dh Lore Mw Libet a PES 5 22 uODeratihti PROCES uasa carci aceto eie 8 2 2 1 Calibrating the Moisture Samples Ped c poda pus 10 2 Table 2e Prset A SR Bas act osea rectius tt Pack S 11 eos Heg tatg TODE RCE OR Re ud POR MR ie OP ROR PRN TET LA PERE ORD a e eM 12 2 2 4 System Shutdown Cur eS SEL INS eth IS EMEN Ie eue ee SD 12 2g Preparation Ttor SAPNO veta ad oic ty ee aeo eroe d eso oS edd afe ins sebo dots ans ds 13 Chapter 3 Specifications Sal Performance Specifications 55 coex oov pe a DER DEVE DEPO RCM UH I UPC Pe dus 15 a oO SEE EI 15 996 Physical EE 15 Appendix A Supplemental Information A RE ORAL RS D EM D Ac E aL EE NR 17 1 NN 18 A amp I Example Les pror diee epos Eta vobi ei adade ED 18 Aus 2 18 A 3 VaporPressure and Calibration amp sss ea etes dam P ac b Co Pa o do t a bee e 18 MG 101 User s Manual V Contents acr no content intended for this vi MG 101 User s Manual Chapter 1 General Information Chapter 1 General Information 1 1 Introduction The MG 101 Field Calibration System is a portable moisture2. S 1 Fill Mark m Fill Tubing E E Screws 2 Figure 2 MG 101 Rear View with Panel Removed MG 101 User s Manual Chapter 2 Setup and Operation 2 1 Preliminary Setup cont 3 4 Open the petcock Fully open the vent valve on the front panel by turning it counter clockwise and turn the WET DRY SELECTOR VALVE to WET see Figure 3 below Using the squeeze bottle fill the saturator bottle until the water level reaches the fill mark on the bottle see Figure 2 on page 5 Close the petcock and reinstall the back panel Wet Dry Selection Valve Vent Valve Inlet Fitting Outlet Fitting Figure 3 MG 101 Front Panel MG 101 User s Manuall Chapter 2 Setup and Operation 2 1 Preliminary Setup cont 7 Connect the nitrogen supply to the MG 101 inlet fitting via the stainless steel pressure regulator using 1 4 OD stainless steel tubing see Figure 4 below Note Swagelok fittings are preferred throughout the installation 8 Connect the calibration chamber to the MG 101 outlet fitting using 1 4 OD SS tubing Then leak test the connection Note GE Sensing Sample Cell 2830 is the preferred calibration chamber for M2 Type probes 9 At the outlet of the calibration chamber connect at least 5 ft 1 5 m of 1 4 OD tubing as a vent to atmosphere The tubing may be coiled to save space 10 Insert
3. Chapter 3 Specifications 3 3 Physical Specifications cont 0 101 MOISTURE GENERATOR VENT VALVE Bry Gas wat oas Gat pav GAS DAUTION OKUTED SECOND ORUTION 12 00 305 mm Figure 8 MG 101 Moisture Generator Outline Dimensions 16 MG 101 User s Manual Appendix A Supplemental Information Appendix A Supplemental Information A 1 Formulas The moisture content generated by the MG 101 as determined by the water vapor pressure is calculated with the following equation P Fwi tt ail da Beat a MW ES PS where the generated vapor pressure of water P the saturation vapor pressure of water as determined by the water temperature of the saturator the vapor pressure of water in the dry nitrogen stream flow rate of the wet gas diluted stream F the flow rate of the wet gas stream the flow rate of the dry gas second dilution stream the flow rate of the dry gas first dilution stream In general P4F4 lt lt P F and lt lt P E 4 Thus Equation 1 above simplifies to F F Py x a y 2 w wl dl The value of P and the dew point from the calculated value p are determined from a chart of vapor pressure of water as a function of temperature see Table 1 on page 19 Equation I above produces an error of less than 2 C 3 6 F dew frost point temperature at the lowest generated dew frost point tem
4. It may contain hazardous substances that could impact health and the environment In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources we encourage you to use the appropriate take back systems Those systems will reuse or recycle most of the materials of your end life equipment in a sound way The crossed out wheeled bin symbol invites you to use those systems If you need more information on the collection reuse and recycling systems please contact your local or regional waste administration Visit http www ge mcs com en about us environmental health and safety 1741 weee reg html for take back instructions and more information about this initiative iv MG 101 User s Manual Contents Information Pdradra RS TE iss ett iil Safety ISSUES iil NN iil Environmental COMPNGM Cesc cant SS ee Seca ky Abd RO UE dL eta ioa bum Des edo he bu Me EE p eum iv Chapter 1 General Information 1 Lo ESNAOLA ERROSCC RPM rM 1 1 5 JA Considerdlilofis o us viuo 3 1371 Operating RANG Gs tuse melee eR at cei Gh daca de M a hat ade ta tu Gy dentes 3 132 Operating EBVIDODEITIePU vsus e Ey a Reha o eR ncaa do o pra DET ECCO a SATETE 3 1 3 3 Operating Requirements ii 3 Chapter 2 Setup and Operation
5. E 4217 4 147 4 079 4 012 3 946 0 4 579 4 504 4431 4 359 4 287 MG 101 User s Manual 19 Appendix A Supplemental Information Table 1 Vapor Pressure of Water cont Aqueous Vapor Pressure Over Water Temp C 0 0 0 2 0 4 0 6 0 8 0 4 579 4 647 4 715 4 785 4 855 1 4 926 4 998 5 070 5 144 5 219 2 5 294 5 370 5 447 5 525 5 605 3 5 685 5 766 5 848 5 931 6 015 4 6 101 6 187 6 274 6 363 6 453 5 6 543 6 635 6 728 6 822 6 917 6 7 013 7 111 7 209 7 309 7 411 7 7 513 7 617 7 722 7 828 7 936 8 8 045 8 155 8 267 8 380 8 494 9 8 609 8 727 8 845 8 965 9 086 10 9 209 9 333 9 458 9 585 9 714 11 9 844 9 976 10 109 10 244 10 380 12 10 518 10 658 10 799 10 941 11 085 13 11 231 11 379 11 528 11 680 11 833 14 11 987 12 144 12 302 12 462 12 624 15 12 788 12 953 13 121 13 290 13 461 16 13 634 13 809 13 987 14 166 14 347 17 14 530 14 715 14 903 15 092 15 284 18 15 477 15 673 15 871 16 071 16 272 19 16 477 16 685 16 894 17 105 17 319 20 17 535 17 753 17 974 18 197 18 422 21 18 650 18 880 19 113 19 349 19 587 22 19 827 20 070 20 316 20 565 20 815 23 21 068 21 324 21 583 21 845 22 110 24 22 377 22 648 22 922 23 198 23 476 25 23 756 24 039 24 326 24 617 24 912 26 25 209 25 509 25 812 26 117 26 426 27 26 739 27 055 27 374 27 696 28 021 28 28 349 28 680 29 015 29 354 29 697 29 30 043 30 392 30 745 31 102 31 461 30 31 824 32 191 32 561 32 934 33 312 31 33 695 34 082 34 471 34 864 35 261 32 35 663 36 068 36 477 36 891 37 308 33 37 72
6. F and drier allow 2 hours e For dew frost point temperatures of 60 C 76 F to 40 C 40 F allow 1 hour Fordew frost point temperatures of 40 C 40 F and wetter allow 30 minutes After you have completed the calibration or other calibrated moisture operation at this dew frost point temperature either shut down the system see System Shutdown on page 12 or repeat the steps in this section for the next calibration point MG 101 User s Manual 11 Chapter 2 Setup and Operation 2 2 3 Using Data Table 2 For calibration points found in Data Table 2 refer to Figure 6 on page 9 and proceed as follows 1 Fully close the vent valve by turning it clockwise CAUTION Make the following adjustments slowly being careful not to overshoot the target value NEVER ALLOW THE SYSTEM TO GO TO A VALUE WETTER THAN THE TARGET VALUE If you overshoot a value in the wetter direction you will have to allow the system to equilibrate dry down again before you can proceed 2 Fully close the DRY GAS FIRST DILUTION VALVE by turning it clockwise 3 Consult Data Table 2 for the desired dew frost point temperature and find the corresponding value in the column headed DRY GAS SECOND DILUTION Adjust the valve on the DRY GAS SECOND DILUTION rotameter to obtain the value shown in the table IMPORTANT Be sure to read the steel ball or glass ball S or G as indicated in the table 4 Byreferring to the desired dew frost point temper
7. of the problem and provide the model number and serial number of the instrument If the nature of the problem indicates the need for factory service GE Sensing will issue a RETURN AUTHORIZATION NUMBER RAN and shipping instructions for the return of the instrument to a service center will be provided 2 If GE Sensing instructs you to send your instrument to a service center it must be shipped prepaid to the authorized repair station indicated in the shipping instructions 3 Upon receipt GE Sensing will evaluate the instrument to determine the cause of the malfunction Then one of the following courses of action will then be taken Ifthe damage is covered under the terms of warranty the instrument will be repaired at no cost to the owner and returned f GE Sensing determines that the damage is not covered under the terms of the warranty or if the warranty has expired an estimate for the cost of the repairs at standard rates will be provided Upon receipt of the owner s approval to proceed the instrument will be repaired and returned MG 101 User s Manual 23 Worranty no content intended for this page 24 MG 101 User s Manual Customer Support Centers U S A The Boston Center 1100 Technology Park Drive Billerica MA 01821 U S A Tel 800 833 9438 toll free 978 437 1000 E mail sensing ge com Ireland Sensing House Shannon Free Zone East Shannon County Clare Ireland Tel 353 0 61 47
8. point temperature of the dry nitrogen source plus 25 C 45 F If dry nitrogen of this quality is not available please contact GE Sensing for assistance The wettest dew frost point temperature that can be generated is determined by the ambient temperature and it must be at least 10 C 18 F below the ambient temperature 1 3 2 Operating Environment The MG 101 is designed to be used indoors or in an environment where ambient temperature changes are not extreme and where the instrument will not be subject to dramatic heating or cooling It is important to ensure that the temperature of the calibrator and especially the saturator bottle will not change between the beginning and the end of the calibration cycle IMPORTANT Changes in the saturator bottle temperature after the calibration parameters have been established will cause errors in the generated dew frost point temperature CAUTION The MG 101 can be damaged by freezing Do not operate it in freezing temperatures 1 3 3 Operating Requirements You will need the following additional equipment to set up and operate the MG 101 calibrator Nitrogen preferably from a liquid source Note Nitrogen gas cylinders may be used but the supply gas must be at least 25 C 45 F drier than the driest dew frost point temperature to be generated Two nitrogen cylinders connected in parallel and plumbed to the inlet of the MG 101 will increase the stability of the gas supply Stainless steel
9. the sensor to be calibrated into the calibration chamber and tighten it sufficiently to ensure a leak proof seal but be careful not to over tighten the sensor Pressure Regulator Nitrogen Calibration Supply Tank Chamber Figure 4 A Typical MG 101 Test Setup MG 101 User s Manual 7 Chapter 2 Setup and Operation 2 2 Operating Procedure To operate the MG 101 refer to Figure 5 below and Figure 6 on page 9 to complete the following steps 1 Fully close all four rotameter valves by turning them clockwise 2 Set the WET DRY selector valve to DRY CAUTION This valve must always be in the WET position before the WET GAS flowmeter valve is opened and it must remain in the DRY position until the WET GAS flowmeter valve is closed 3 Set the pressure regulator on the nitrogen gas inlet line to approximately 55 psig 4 Make sure the vent valve at the top of the front panel is fully open 5 Fully open the valve on the WET GAS DILUTED rotameter Note The rotameters are dual range floating ball types each having both a steel ball and a glass ball When reading the rotameters be careful to watch either the steel ball or the glass ball see Figure 4 below as directed numbers in tables are followed by an S or a G to designate the ball material Glass Ball black Steel Ball silver Figure 5 Rotameter Valve and Balls 8 MG 101 User s Manuall Chapter 2 Setup and Ope
10. 0291 E mail gesensingsnnservices ge com An ISO 9001 2008 Certified Company www ge mcs com en about us quality html www ge mcs com 2012 General Electric Company All rights reserved Technical content subject to change without notice 910 115 Rev E
11. 4 738 53 743 85 749 20 754 58 100 760 00 765 45 770 93 776 44 782 00 101 787 57 793 18 798 82 804 50 810 21 22 MG 101 User s Manual Worranty Warranty Each instrument manufactured by GE Sensing is warranted to be free from defects in material and workmanship Liability under this warranty is limited to restoring the instrument to normal operation or replacing the instrument at the sole discretion of GE Sensing Fuses and batteries are specifically excluded from any liability This warranty is effective from the date of delivery to the original purchaser If GE Sensing determines that the equipment was defective the warranty period 15 year from delivery for electronic or mechanical failures one year from delivery for sensor shelf life If GE Sensing determines that the equipment was damaged by misuse improper installation the use of unauthorized replacement parts or operating conditions outside the guidelines specified by GE Sensing the repairs are not covered under this warranty The warranties set forth herein are exclusive and are in lieu of all other warranties whether statutory express or implied including warranties or merchantability and fitness for a particular purpose and warranties arising from course of dealing or usage or trade Return Policy Ifa GE Sensing instrument malfunctions within the warranty period the following procedure must be completed 1 Notify GE Sensing giving full details
12. 7 80 199 50 201 30 203 10 67 204 96 206 80 208 60 210 50 212 30 68 214 17 216 00 218 00 219 90 221 80 69 223 73 225 70 227 70 229 70 231 70 70 233 70 235 70 237 70 239 70 241 80 71 243 90 246 00 248 20 250 30 252 40 72 254 60 256 80 259 00 261 20 263 40 73 265 70 268 00 270 20 272 60 274 80 74 277 20 279 40 281 80 284 20 286 60 75 289 10 291 50 294 00 296 40 298 80 76 301 40 303 80 306 40 308 90 311 40 77 314 10 316 60 319 20 322 00 324 60 78 327 30 330 00 332 80 335 60 338 20 79 341 00 343 80 346 60 349 40 352 20 80 355 10 358 00 361 00 363 80 366 80 81 369 70 372 60 375 60 378 80 381 80 82 384 90 388 00 391 20 394 40 397 40 83 400 60 403 80 407 00 410 20 413 60 MG 101 User s Manual 21 Appendix A Supplemental Information Table 1 Vapor Pressure of Water cont Aqueous Vapor Pressure Over Water cont Temp C 0 0 0 2 0 4 0 6 0 8 84 416 80 420 20 423 60 426 80 430 20 85 433 60 437 00 440 40 444 00 447 50 86 450 90 454 40 458 00 461 60 465 20 87 468 70 472 40 476 00 479 80 483 40 88 487 10 491 00 494 70 498 50 502 20 89 506 10 510 00 513 90 517 80 521 80 90 525 76 529 77 533 80 537 86 541 95 91 546 05 550 18 554 35 558 53 562 75 92 566 99 571 26 579 59 579 87 584 22 93 588 60 593 00 597 43 601 89 606 38 94 610 90 615 44 620 01 624 61 629 24 95 633 90 638 59 643 30 648 05 652 82 96 657 62 662 45 667 31 672 20 677 12 97 682 07 687 04 692 05 697 10 702 17 98 707 27 712 40 717 56 722 75 727 98 99 733 2
13. 9 38 155 38 584 39 018 39 457 34 39 898 40 344 40 796 41 251 41 710 35 42 175 42 644 43 117 43 595 44 078 36 44 563 45 054 45 549 46 050 46 556 37 47 067 47 582 48 102 48 627 49 157 38 49 692 50 231 50 774 51 323 51 879 39 52 442 53 009 53 580 54 156 54 737 40 55 324 55 910 56 510 57 110 57 720 4 58 340 58 960 59 580 60 220 60 860 20 MG 101 User s Manual Appendix A Supplemental Information Table 1 Vapor Pressure of Water cont Aqueous Vapor Pressure Over Water cont Temp C 0 0 0 2 0 4 0 6 0 8 42 61 500 62 140 62 800 63 460 64 120 43 64 800 65 480 66 160 66 860 67 560 44 68 260 68 970 69 690 70 410 71 140 45 71 880 72 620 73 360 74 120 74 880 46 75 650 76 430 77 210 78 000 78 800 47 79 600 80 410 81 230 82 050 82 870 48 83 710 84 560 85 420 86 280 87 140 49 88 020 88 900 89 790 90 690 91 590 50 92 51 93 50 94 40 95 30 96 30 51 97 20 98 20 99 10 100 10 101 10 52 102 09 103 10 104 10 105 10 106 20 53 107 20 108 20 109 30 110 40 111 40 54 112 51 113 60 114 70 115 80 116 90 55 118 04 119 10 120 30 121 50 122 60 56 123 80 125 00 126 20 127 40 128 60 57 129 82 131 00 132 30 133 50 134 70 58 136 08 137 30 138 50 139 90 141 20 59 142 60 143 90 145 20 146 60 148 00 60 149 38 150 70 152 10 153 50 155 00 61 156 43 157 80 159 30 160 80 162 30 62 163 77 165 20 166 80 168 30 169 80 63 171 38 172 90 174 50 176 10 177 70 64 179 31 180 90 182 50 184 20 185 80 65 187 54 189 20 190 90 192 60 194 30 66 196 09 19
14. GE Measurement amp Control Moisture User s Manual imagination at work 2012 GE Measurement amp Control MG 101 Field Moisture Calibration System User s Manual 910 115 Rev E March 2012 WWW ge mcs com 2012 General Electric Company All rights reserved Technical content subject to change without notice no content intended for this page Preface Information Paragraphs e Note paragraphs provide information that provides a deeper understanding of the situation but is not essential to the proper completion of the instructions Important paragraphs provide information that emphasizes instructions that are essential to proper setup of the equipment Failure to follow these instructions carefully may cause unreliable performance Caution paragraphs provide information that alerts the operator to a hazardous situation that can cause damage to property or equipment Warning paragraphs provide information that alerts the operator to a hazardous situation that can cause injury to 9 paragraphs p p jury personnel Cautionary information is also included when applicable Safety Issues WARNING Itis the responsibility of the user to make sure all local county state and national codes regulations rules and laws related to safety and safe operating conditions are met for each installation Auxiliary Equipment Local Safety Standards The user must make sure that he op
15. adily go from a wetter valve to a drier value Wetter to drier changes always require a longer equilibration period For example if you are calibrating a moisture probe over the range of 60 C dew frost point temperature to 10 C dew frost point temperature start with the 60 C dew frost point temperature 1 Check the saturator bottle temperature on the temperature gauge 2 For each moisture calibration point you wish to generate look at Data Tables 2 and 3 supplied with the MG 101 Above the line which reads Generated Dew Points Deg C 1s a row of values headed Ambient Temperature Deg C Find the column corresponding as closely as possible to the temperature measured in Step 1 above and read down the column of dew frost points dew points in the table below this temperature heading Note The moisture value you wish to generate may be in either Data Table 2 or Data Table 3 You will find that drier calibration points are in Data Table 3 while wetter values are in Data Table 2 At this point the MG 101 operating procedure depends on which table contains your calibration point Ifyour calibration point is in Data Table 3 go to Using Data Table 3 on page 11 e Ifyour calibration point is in Data Table 2 go to Using Data Table 2 on page 12 10 MG 101 User s Manuall Chapter 2 Setup and Operation 2 2 2 Using Data Table 3 For calibration points found in Data Table 3 refer to Figure 6 on pa
16. ature in Data Table 2 find the corresponding value in either the column headed WET GAS or the column headed WET GAS DILUTED a given value appears in one column or the other but not both Adjust the valve on the WET GAS rotameter but not on the Wet Gas Diluted rotameter which must remain fully open to obtain the reading indicated on either the WET GAS or the WET GAS DILUTED rotameter scales whichever is indicated in the table IMPORTANT Be sure to read the steel ball or glass ball S or G as indicated in the table After equilibrium has been established the MG 101 will be delivering a calibration gas with the selected dew frost point temperature After you have completed the calibration or other calibrated moisture operation at this dew frost point temperature either shut down the system see System Shutdown below or repeat the steps in this section for the next calibration point 2 2 4 System Shutdown If you are not planning another calibration run you must shut the system down as follows 1 Fully open the vent valve by turning it counter clockwise 2 Fully close the WET GAS VALVE by turning it clockwise 3 Fully close the DRY GAS FIRST DILUTION VALVE by turning it clockwise 4 Fully close the DRY GAS SECOND DILUTION VALVE by turning it clockwise 5 Setthe WET DRY VALVE to DRY 12 MG 101 User s Manuall Chapter 2 Setup and Operation 2 2 5 Preparation for Shipping To ship or to move the MG 101 refer to Fig
17. e is known the table yields the saturated water vapor pressure Ps in mm of Hg Water Vapor Pressure Over Ice Temp C 0 2 4 6 8 90 0 000070 0 000048 0 000033 0 000022 0 000015 80 0 000400 0 000290 0 000200 0 000140 0 000100 70 0 001940 0 001430 0 001050 0 000770 0 000560 60 0 008080 0 006140 0 004640 0 003490 0 002610 50 0 029550 0 023000 0 017800 0 013800 0 010600 40 0 096600 0 076800 0 060900 0 048100 0 037800 30 0 285900 0 231800 0 187300 0 150700 0 120900 Temp C 0 0 0 2 04 0 6 0 8 29 0 317 0 311 0 304 0 298 0 292 28 0 351 0 344 0 337 0 330 0 324 7 0 389 0 381 0 374 0 366 0 359 26 0 430 0 422 0 414 0 405 0 397 25 0 476 0 467 0 457 0 448 0 439 24 0 526 0 515 0 505 0 495 0 486 23 0 580 0 569 0 558 0 547 0 536 22 0 640 0 627 0 615 0 603 0 592 21 0 705 0 691 0 678 0 665 0 652 20 0 776 0 761 0 747 0 733 0 719 19 0 854 0 838 0 822 0 806 0 791 18 0 939 0 921 0 904 0 887 0 870 17 1 031 1 012 0 993 0 975 0 956 16 1 132 1111 1 091 1 070 1 051 15 1 241 1 219 1 196 1 175 1 153 14 1 361 1 336 1 312 1 288 1 264 13 1 490 1 464 1 437 1 411 1 386 12 1 632 1 602 1 574 1 546 1 518 11 1 785 1 753 1 722 1 691 1 661 10 1 950 1 916 1 883 1 849 1 817 9 2 131 2 093 2 057 2 021 1 985 8 2 326 2 285 2 246 2 207 2 168 7 2 537 2 493 2 450 2 408 2 367 6 2 765 2 718 2 672 2 626 2 581 5 3 013 2 962 2 912 2 862 2 813 4 3 280 3 225 3 171 3 117 3 065 3 3 568 3 509 3 451 3 393 3 336 2 3 880 3 816 3 753 3 691 3 630
18. erates all auxiliary equipment in accordance with local codes standards regulations or laws applicable to safety Working Area WARNING Auxiliary equipment may have both manual and automatic modes of operation As equipment can move suddenly and without warning do not enter the work cell of this equipment during automatic operation and do not enter the work envelope of this equipment during manual operation If you do serious injury can result WARNING Make sure that power to the auxiliary equipment is turned OFF and locked out before you perform maintenance procedures on the equipment Qualification of Personnel Make sure that all personnel have manufacturer approved training applicable to the auxiliary equipment Personal Safety Equipment Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment Examples include safety glasses protective headgear safety shoes etc Unauthorized Operation Make sure that unauthorized personnel cannot gain access to the operation of the equipment MG 101 User s Manual iii Preface Environmental Compliance Waste Electrical and Electronic Equipment WEEE Directive GE Measurement amp Control is an active participant in Europe s Waste Electrical and Electronic Equipment WEEE take back initiative directive 2002 96 EC The equipment that you bought has required the extraction and use of natural resources for its production
19. et gas D dry gas second dilution Stream B the dry gas first dilution is mixed with stream C the wet gas after it passes through the saturator bottles to form a Wet gas diluted mixture stream E This is then mixed with stream D the dry gas second dilution to generate the desired output mixture stream F Obtaining an accurate output mixture requires careful adjustment of the rotameter valves as described in Setup and Operation on page 5 Calibration of all rotameters and the thermometer is traceable to NIST standards Note The rotameter scales are used in later steps to reference a lookup table By themselves they do not indicate units of flow Vent Valve Outlet Dry Gas Dry Gas First Dilution i Second Flowmeter Dilution Flowmeter Wet Gas Wet Gas Diluted Flowmeter Flowmeter Saturator Bottle Pressure D Regulator Figure 1 Flow Schematic 2 MG 101 User s Manuall Chapter 1 General Information 1 3 Initial Considerations This section presents some general guidelines to ensure accurate results with the MG 101 1 3 1 Operating Range While the driest dew frost point temperature capability specified for the MG 101 is 75 C 103 F the actual limit is determined by the moisture content of the dry nitrogen source and by the ambient temperature The driest dew frost point temperature the MG 101 can produce is the dew frost
20. ge 9 and proceed as follows 1 Fully open the vent valve by turning it counter clockwise CAUTION Make the following adjustments slowly being careful not to overshoot the target value NEVER ALLOW THE SYSTEM TO GO TO A VALUE WETTER THAN THE TARGET VALUE If you overshoot a value in the wetter direction you will have to allow the system to equilibrate dry down again before you can proceed 2 In Data Table 3 look below the body of the table for Notes 7 and 2 Adjust both the valves on the DRY GAS FIRST DILUTION and the DRY GAS SECOND DILUTION rotameters to the values listed IMPORTANT Be sure to read the steel ball or glass ball S or G as indicated in the table 3 Consult Data Table 3 for the desired dew frost point temperature and find the corresponding value in the column headed WET GAS Adjust the WET GAS valve to obtain the value indicated in the table 4 Byreferring to the desired dew frost point temperature in Data Table 3 find the corresponding value in the column headed WET GAS DILUTED Adjust the vent valve but not the valve on the WET GAS DILUTED rotameter which must remain fully open to obtain the value indicated in Data Table 3 After stabilizing the system output will be at the selected dew frost point temperature and it is ready for use The stabilization period depends on the dew frost point temperature you are using In general the following times are required For dew frost point temperatures of 60 C 76
21. generator used for checking and if necessary recalibrating GE Sensing moisture probes The MG 101 can generate dew frost points in the range of 75 to 20 C 103 to 68 F dew frost point temperature It is a totally mechanical device requiring only a supply of dry nitrogen and it is inherently explosion proof Although specifically designed for calibrating GE Sensing moisture probes the MG 101 can be used for any application requiring accurate and repeatable moisture samples 1 2 Theory Of Operation Precise moisture concentrations are generated by passing dry nitrogen through a water saturator and mixing the resulting saturated stream with a dry nitrogen stream from the same source for a first dilution This resulting first dilution is then further diluted in a second mixing stage resulting in dew frost point temperatures as low as 75 C 103 F The MG 101 consists of the following components Pressure regulator Four adjustable rotameters flowmeters with valves e Saturator bottle Filter Temperature gauge Vent valve See the diagram and explanation in Figure 7 on page 2 for a description of how the MG 101 works MG 101 User s Manual 1 Chapter 1 General Information 1 2 Theory of Operation cont As shown in Figure 7 below dry nitrogen enters at the dry gas inlet A passes through the fixed internal pressure regulator and splits into the following three streams B dry gas first dilution e C w
22. peratures and virtually no error at higher dew frost point temperatures The advantage of Equation 2 above is that a precise determination of the dew frost point temperature of the gas supply is not necessary It is good practice however to use the hygrometer to determine an approximate dew frost point temperature of the dry gas supply To obtain the lowest dew frost point temperatures within the specified accuracy the dry gas supply should not exceed 3 of the desired mixture concentration MG 101 User s Manual 17 Appendix A Supplemental Information A 2 Typical Examples The following examples show typical calculations based on the equations presented on the previous page A 2 1 Example 1 Data Table 2 is provided with the MG 101 to enable you to use the field calibration system to check sensor probe calibration without calculating the value of p Data Table 2 was compiled by calculating p and thus the dew frost point temperature by Equation 2 on the previous page To use Data Table 2 set the rotameters per the columns headed Dry Gas Setting and either High Wet Gas Setting or Low Wet Gas Setting Moving horizontally across the table read the generated dew frost point temperature under the appropriate temperature reading Note The term Flowmeter used in the data tables and is equivalent to the word rotameter used in this manual A 2 2 Example 2 To determine generated dew frost point temperatures other
23. pressure regulator to set the inlet pressure to 55 psig 1 4 OD stainless steel tubing e An appropriate test chamber Note GE Sensing Sample Cell 2830 is preferred for M2 Type probes A hygrometer to monitor the moisture sensor for either the dew frost point reading if simply verifying the moisture sensor performance or the sensor output signal if generating a new calibration curve Note The hygrometer used for the calibration can be either a dedicated instrument for use only with the moisture generator or the process instrument that will be used with the recalibrated sensor after the calibration is completed MG 101 User s Manual 3 Chapter 1 General Information no content intended for this page 4 MG 101 User s Manual Chapter 2 Setup and Operation Chapter 2 Setup and Operation 2 1 Preliminary Setup IMPORTANT Be sure you read and understand Initial Considerations on page 3 before proceeding To prepare the MG 101 for operation complete the following steps 1 Remove the back panel by removing the two small screws at the bottom see Figure 2 below 2 Fillthe supplied plastic squeeze bottle with distilled not deionized water and connect it to the fill tubing at the bottom of the saturator bottle see Figure 2 below This length of plastic tubing should be left permanently attached to the fitting at the bottom of the saturator bottle Saturator Bottle
24. ration 2 2 Operating Procedure cont 6 Open and adjust the valves on both the DRY GAS FIRST DILUTION and the DRY GAS SECOND DILUTION rotameters so that the steel ball indicates approximately 10 on the rotameter scales 7 Adjust the vent valve so that the steel ball on the WET GAS DILUTED rotameter also reads approximately 10 IMPORTANT Leak test all connections from the nitrogen supply to the calibration chamber before proceeding 8 Allow the nitrogen to purge through the entire system at the rotameter settings defined in the previous steps The calibration system will begin to dry down and eventually come to equilibrium with the dry nitrogen supply gas The time required to achieve equilibrium will vary depending on the moisture level of the nitrogen approximately 6 to 18 hours will be required 9 After the calibration system has reached equilibrium set the valve on the WET DRY rotameter to the WET position Wet Dry Vent Valve SE Temperature Selector Valve Gauge Wet Gas Diluted Dry Gas First Dilution a Second Dilution Rotameters ouner Figure 6 Rotameters and Valves MG 101 User s Manual 9 Chapter 2 Setup and Operation 2 2 1 Calibrating the Moisture Samples To generate calibrated moisture samples proceed as follows Note sure to start with the driest calibration value and proceed to the wetter values because you cannot re
25. than those listed in Data Table 2 Equation 2 on the previous page must be used as shown in the following example If Dry Gas first dilution flowmeter setting Fy 4 500 cc min Dry Gas second dilution flowmeter setting Fg 4 500 cc min Wet Gas flowmeter setting 20 cc min 140 cc min Wet Gas diluted flowmeter setting Fy 347 cc min Thermometer reading T 20 C and P 17 535 mm Hg at 20 C from Table 1 on page 19 Then F F Ww wl w 2 t Ps 3 347cc min 140cc min c c o W 347cc min 4500cc mirY 140cc min 4500cc mi 17 353mmHg 4 And Pw 0 0375 mm Hg which is equivalent to a dew frost point temperature of 48 C by interpolation A 3 Vapor Pressure and Calibration Tables Table 1 on page 19 1s the vapor pressure of water as a function of temperature IMPORTANT Two tables not included in this manual Data Tables 2 and 3 are sets of calibrations generated at the factory for each MG 101 These tables are supplied with the unit and you must use these tables to operate the MG 101 Since each table is specific to your instrument you cannot use tables from another unit If you lose these tables contact the factory and duplicates will be provided 18 MG 101 User s Manual Appendix A Supplemental Information Table 1 Vapor Pressure of Water Note Jf the dew frost point is known the table yields the partial water vapor pressure Py in mm of Hg If the ambient or actual gas temperatur
26. ure 7 below and empty the saturator bottle as follows 1 2 3 4 Remove the rear panel by removing the two small screws at the bottom Fully open the vent valve by turning it counter clockwise Place the end of the fill tubing in a container below the level of the saturator bottle and open the petcock When the saturator bottle is completely empty close the petcock and the vent valve and reinstall the rear panel Saturator Bottle 4 7 Fill Tubing Screws 2 Figure 7 Emptying the Saturator Bottle MG 101 User s Manual 13 Chapter 2 Setup and Operation no content intended for this page 14 MG 101 User s Manual Chapter 3 Specifications Chapter 3 Specifications 3 1 Performance Specifications Generated Dew Frost Point 75 C 103 F up to 10 C 18 F below ambient temperature Temperature Range Accuracy 41 C 1 8 F 3 2 Operating Specifications Inlet Gas Supply Must be a minimum of 25 C 45 F drier than the driest sample to be generated Flow Rate 9 2 liters minute 19 6 SCFH maximum Inlet Pressure 55 60 psig Outlet Pressure Ambient pressure Power Requirements None 3 3 Physical Specifications Dimensions W x H x D 12 x 18 x 6 304 8 mm x 457 2 mm x 152 4 mm Inlet and Outlet Connections 1 4 Swagelok tube fittings Note See Figure 8 on page 16 for a dimensional drawing of the MG 101 MG 101 User s Manual 15
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