GE Panametrics MG101 Portable Hygrometer Manual PDF
Contents
1. Ifa GE Panametrics instrument malfunctions within the warranty period the following procedure must be completed 1 Notify GE Panametrics giving full details 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 Panametrics 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 Panametrics 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 Panametrics 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 the warranty the instrument will be repaired at no cost to the owner and returned If GE Panametrics 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 January 2004 nl Table of Contents Introduction sr sten eque deld rdnr data 1 Theory Of Operation ex pote rete Quse pod tease sees 12. drier calibration points are in Data Table 3 while wetter values are found in Data Table 2 The purpose of determining which table holds the desired calibration value is to direct you to the correct operating procedure From this point on the MG101 operating procedure depends on which table contains your calibration point If your calibration point is in Data Table 3 go to page 9 If your calibration point is in Data Table 2 go to page 10 January 2004 Using Data Table 3 Temperature Vent Valve Wet Dry Selector a Valve PAR Wet Gas J m J Jo Wet Gas Diluted Dry Gas IE E F Dry Gas First Dilution IE je Second Dilution Figure 6 Rotameters and Valves For calibration points found in Data Table 3 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 DO NOT 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 1 and 2 Adjust both the valves on the DRY GAS FIRST DILUTION and the DRY GAS SECOND DILUTION rotameters to the values sh
3. GE Panametrics Model MG 101 Field Calibration System SL January 2004 Process Control Instruments Model MG101 Field Calibration System User s Manual 910 115B GE Panametrics January 2004 MG101 Field Calibration System lii January 2004 Warranty Return Policy Each instrument manufactured by GE Panametrics 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 Panametrics Fuses and batteries are specifically excluded from any liability This warranty is effective from the date of delivery to the original purchaser If GE Panametrics determines that the equipment was defective the warranty period is one year for general electronic failures of the instrument one year for mechanical failures of the sensor If GE Panametrics 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 Panametrics 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
4. Initial Considerations eren texere tee debe EUER OMA E e Ex eR Sie 3 Operating Ranges de moe ore ia D eee hone a DUE qe eie tovt 3 Operating Environment verre epe dex peg e ee Etpa eg tae UR RR iR dg 3 Operating Requirements oo an oan onaards eed tn ete RC ee Re dose a 4 Preliminary Setup ue s x een o ORI E tete A 5 Operating Procedure san eco e cae pene Wi Ae els E RU UR A RE eR ee 7 Calibrating the Moisture Samples aa onee ee eee ee es 8 Using Data sana bean te Re Ace p eiua eq Re 9 Using DataTable 2 sassen dann ek eta dtas ede wie nn 10 System Sh tdOoWh sers caties kri ol a E DEA PROUD ie ede 11 Preparation for Shipping eenen ee eee eee eee eee 12 Sp cifications nnen sne venete bete eX eend nea ee a 13 Performance Specifications onee 13 Operating Specifications oee mms 13 Physical Specifications nva za namme LERRA IRR EE EEE Y e RY dus 13 SparesParts List cuu B EEE EL Pe WEN EE Eat 13 Formulas Id deed Rad lam La hows Peas Ria b See IE eet 15 Typical Examples 4 arresten Wwe an Sai bane eee Gals 16 Example MS 16 Example Zin sels NEEN ER ANNA dor rrr e ERE a 16 Vapor Pressure and Calibration Tables onee eee eee 16 January 2004 Introduction The MG101 Field Calibration System is a portable moisture generator used for checking and if necessary re calibrating GE Paname
5. 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 can be a dedicated instrument for use only with the moisture generator or the process instrument which will be used with the recalibrated sensor after the calibration is completed January 2004 nl Preliminary Setup Caution Be sure you read and understand nitial Considerations on page 3 before proceeding 1 Take off the back panel by removing the two small back screws see Figure 2 below 2 Fill the 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 is left permanently attached to the fitting at the bottom of the saturator bottle Saturator Bottle Fill Mark Fill Tubing Petcock Screw 2 places Figure 2 MG101 Rear View with panel removed 3 Open the petcock 4 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 on page 6 5 Using the squeeze bottle fill the saturator bottle until the water level reaches the fill mark on the bottle
6. 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 1 111 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 1 4217 4147 4 079 4 012 3 946 0 4 579 4 504 4 431 4 359 4 287 17 January 2004 EE Table 1 Vapor Pressure of Water Continued 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 7 122 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 67
7. The Netherlands Telephone 31 0 33 253 64 44 Fax 31 0 33 253 72 69 E mail info panametrics nl France BP 106 11 Rue du Renard 92253 La Garenne Colombes Cedex France Telephone 33 0 1 47 82 42 81 Fax 33 0 1 47 86 74 90 E mail panametrics panametrics fr Germany Mess und Pruftechnik Robert Bosch Strabe 20a 65719 Hofheim Germany Telephone 49 6122 8090 Fax 49 6122 8147 E mail panametrics t online de Italy Via Feltre 19 A 20132 Milano Italy Telephone 02 2642131 Fax 02 26414454 E mail info panametrics it Japan 2F Sumitomo Bldg 5 41 10 Koishikawa Bunkyo Ku Tokyo 112 0002 Japan Telephone 81 03 5802 8701 Fax 81 03 5802 8706 E mail pci panametrics co jp Korea Kwanghee Bldg 201 644 2 Ilwon dong Kangnam Ku Seoul 135 945 Korea Telephone 82 2 445 9512 Fax 82 2 445 9540 E mail jkpark panaeng co kr Spain Diamante 42 28224 Pozuelo de Alarcon Madrid Spain Telephone 34 91 351 82 60 Fax 34 91 351 13 70 E mail info panametrics infonegocio com Sweden Box 160 147 23 Tumba Sweden Telephone 46 0 8 530 685 00 Fax 46 0 8 530 357 57 E mail pana panametrics se Taiwan 7th FI 52 Sec 3 Nan Kang Road Taipei Taiwan ROC Telephone 02 2788 3656 Fax 02 2782 7369 E mail rogerlin lumax com tw United Kingdom Unit 2 Villiers Court 40 Upper Mulgrave Road Cheam Surrey SM2 7AJ England Telephone 020 8643 5150 Fax 020 8643 4225 E mail uks
8. see Figure 2 above 6 Then close the petcock and replace the back panel January 2004 Preliminary Setup cont Wet Dry Selection Vent Valve 9 Outlet Fitting Figure 3 MG101 Front View 7 Connect the nitrogen supply to the inlet fitting via the stainless steel pressure regulator using 1 4 OD stainless steel tubing Swagelok fittings are preferred throughout 8 Connect the calibration chamber to the outlet fitting using 1 4 OD SS tubing and leak test the connection The preferred calibration chamber for use with Type M2 moisture probes is GE Panametrics Sample Cell part number 2830 At the outlet of the calibration chamber connect at least 5 ft 1 5 m of 1 4 OD tubing as a vent to the atmosphere The tubing may be coiled to save space 9 Insert the sensor to be calibrated into the calibration chamber and tighten it sufficiently to ensure a leak proof seal do not over tighten Calibration Pressure Chamber Supply Tank Regulator x Figure 4 A Typical MG101 Test Setup January 2004 Es _ ____ Operating Procedure Refer to Figure 5 below and Figure 6 on page 9 to complete the following steps m Fully close all four rotameter valves by turning them clockwise r2 Set the WET DRY selector valve to DRY Caution Th
9. 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 Once the calibration system has reached equilibrium set the valve on the WET DRY rotometer to the WET position To generate calibrated moisture samples proceed as follows Note Be sure to start with the driest calibration value and proceed to the wetter values since you cannot readily go from a wetter 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 MG101 Note that above the line which reads Generated Dew Points Deg C is 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 Note The moisture value you wish to generate may be in either Data Table 2 or Data Table 3 You will find that
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 09 197 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 TI 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 19 January 2004 EE Table 1 Vapor Pressure of Water Continued 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 4
11. 2 is provided with the MG101 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 Py and thus the dew frost point temperature by Equation 2 on page 15 To use Data Table 2 set the rotameters per the columns headed Dry Gas Setting and either High or Low Wet Gas Setting Moving horizontally across the chart read the generated dew frost point temperature under the appropriate temperature reading Note The term Flowmeter is used in the data tables and is equivalent to the word rotameter used in this manual To determine generated dew frost point temperatures other than those listed in Data Table 2 Equation 2 on page 15 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 Fy 4 500 cc min Wet Gas flowmeter setting 20 cc min F 140 cc min Wet Gas diluted flowmeter setting F 347 cc min Thermometer reading T 20 C and P 17 535 mm Hg at 20 C from Table D 1 on page D 1 F F wW wl Then WwW S Fy F Fyi Fay el 347cc min X 140cc min Py Grenen CPE Pw 0 0375 mm Hg which is equivalent to dew frost point temperature of 48 C by interpolation Table 1 on page 17 is the vapor pressure of water as a function of temperature T
12. 3 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 37 729 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 41 58 340 58 960 59 580 60 220 60 860 18 Table 1 Vapor Pressure of Water Continued January 2004 nl 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
13. 61 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 26 575 55 579 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 24 738 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 20 GE Panametrics MAIN OFFICES WORLDWIDE OFFICES GE PANAMETRICS INTERNATIONAL OFFICES USA GE Panametrics 221 Crescent St Suite 1 Waltham MA 02453 3497 USA Telephone 781 899 2719 Toll Free 800 833 9438 Fax 781 894 8582 E mail panametrics 9 ps ge com Web www gepower com panametrics ISO 9001 Certified Ireland GE Panametrics Shannon Industrial Estate Shannon Co Clare Ireland Telephone 353 61 470200 Fax 353 61 471359 E mail info panametrics ie ISO 9002 Certified July 2003 Australia P O Box 234 Gymea N S W 2227 Australia Telephone 61 02 9525 4055 Fax 61 02 9526 2776 E mail panametrics panametrics com au Austria Waldgasse 39 A 1100 Wien Austria Telephone 43 1 602 25 34 Fax 43 1 602 25 34 11 E mail panametrics netway at Benelux Postbus 111 3870 CC Hoevelaken
14. ales panametrics ie USA GE Panametrics 221 Crescent Street Suite 1 Waltham MA 02453 3497 Telephone 781 899 2719 Toll free 800 833 9438 Fax 781 894 8582 E Mail panametrics ps ge com Web www gepower com panametrics Ireland GE Panametrics Shannon Industrial Estate Shannon County Clare Ireland Telephone 353 61 470200 Fax 353 6 1 471359 E Mail info panametrics ie
15. d the calibration or other calibrated moisture operation at this dew frost point temperature either shut down the system see below or repeat the steps in this section for the next calibration point 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 Set the WET DRY VALVE to DRY 11 January 2004 Preparation for To ship or to move MG101 refer to Figure 7 below and empty the Shipping saturator bottle as follows 1 2 3 Remove the rear panel 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 replace the rear panel Saturator Bottle sl Fill Tubing Petcock Screw places mn Figure 7 Emptying the Saturator Bottle 12 January 2004 Specifications Performance Specifications Operating Specifications Physical Specifications Spare Pa
16. is valve must always be in the WET position before the WET GAS flowmeter valve is opened and it must remain in this position until the WET GAS flowmeter valve is closed 3 Set the pressure regulator on the inlet gas nitrogen 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 5 below as directed numbers in tables are followed by an S or G to designate the ball material Glass Ball black Steel Ball silver Valve Figure 5 Rotameter Valve and Balls 6 Open and adjust the valves on both the DRY GAS FIRST DILUTION and the DRY GAS SECOND DILUTION rotameters Adjust each so that the steel ball indicates approximately 10 on the rotameter scale 7 Next adjust the vent valve so that the steel ball on the WET GAS DILUTED rotameter also reads approximately 10 January 2004 Operating Procedure cont Calibrating the Moisture Samples IMPORTANT Leak test all connections from the N supply to the calibration chamber before proceeding 8 Allow the nitrogen to purge through the entire system at the rotameter settings defined on the previous page The calibration
17. of the saturator vapor pressure of water in the dry nitrogen stream the flow rate of the wet gas diluted stream F 4 the flow rate of the wet gas stream F the flow rate of the dry gas second dilution stream Fq the flow rate of the dry gas first dilution stream In general P4F lt lt PF lt lt P Fw1 therefore Equation wl C 1 above simplifies to b Berta The value of P 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 17 Equation 1 above produces an error of less than 2 C 3 6 F dew frost point temperature at the lowest generated dew frost point temperatures and virtually no error at higher generate 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 15 January 2004 Typical Examples Example 1 Example 2 Vapor Pressure and Calibration Tables The following examples show typical calculations based on the equations presented on page 15 Data Table
18. on 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 Chapter 2 Operation Note The rotameter scales are used in later steps to reference a lookup table By themselves they do not indicate units of flow Calibration of all rotameters and the thermometer is traceable to NIST standards Vent Valve N en Downy 7 alve Z N Gas Dry Gas First Dilution 5 Filter Second Flowmeter Dilution Flowmeter Wet Gas Wet Gas Diluted Flowmeter Flowmeter B Dry Gas Saturator Inlet Bottle A Pressure D Regulator Figure 1 Flow Schematic January 2004 Initial Considerations Operating Range While the driest dew frost point temperature capability specified for the MG101 is 75 C 103 R 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 MG101 can produce is the dew frost point temperature of the dry nitrogen source plus 25 C 45 F If dry nitrogen of this quality is not available please contact GE Panametrics f
19. or assistance The wettest dew frost point temperature that can be generated is determined by the ambient temperature and must be at least 10 C 18 F below the ambient temperature Operating Environment MGIOI is designed to be used indoors or in an environment where ambient temperature changes are not extreme and where the device will not be subject to dramatic heating or cooling It is important to ascertain that the temperature of the calibrator and in particular the saturator bottle will not change between the beginning and the end of the calibration cycle Caution Changes in saturator bottle temperature after calibration parameters have been established will cause errors in generated dew frost point temperature The MG101 can be damaged by freezing Do not operate it in freezing temperatures January 2004 EE ____ Operating Requirements You will need the following additional equipment to set up and operate the MG101 calibrator Nitrogen preferably from a liquid source Cylinders may be used however the supply gas must be 25 C 45 F drier than the driest dew frost point temperature to be generated If cylinders must be used two cylinders in parallel plumbed to the inlet of the MG10 will increase the stability of the gas supply e A stainless steel pressure regulator to set the inlet pressure to 55 psig 1 4 OD stainless steel tubing e An appropriate test chamber GE Panametrics Sample Cell 2830
20. own IMPORTANT Be sure to read the steel or glass ball S or G as indicated 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 Data Table 3 January 2004 Using Data Table 3 cont Using Data Table 2 4 By referring 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 remains 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 will be ready for use The stabilization period depends on the dew frost point temperature you are using In general for dew frost point temperatures of 60 C 76 F and drier allow 2 hours For dew frost point temperatures between 60 C 76 F and 40 C 40 F allow 1 hour For wetter dew frost points allow 30 minutes When you have completed the calibration or other calibrated moisture operation at this dew frost point temperature either shut down the system see page 11 or repeat the steps in this section for the next calibration point For calibration points found in Data Table 3 proceed as follows 1 Fully close the vent valve by turning it clockwise Caution Make the following adjus
21. rts List Generated Dew Frost Point Temperature Range 75 C up to 10 C 18 F below ambient temperature Accuracy 1 C 1 8 F Inlet Gas Supply Must be a minimum of 25 C 45 F drier than the driest sample to be generated Flow Rate 0 2 liters minute maximum Inlet Pressure 55 60 psig Outlet Pressure Ambient to 10 psig adjustable Power Requirements None Dimensions 12W x 18H x 6D in 304 8W x 457 2H x 152 4D mm Inlet and Outlet Connections 1 4 Swagelok tube fitting Part Number Qty Description MG B125 20 1 20 mm flowmeter tube MG B125 30 1 30 mm flowmeter tube MG B125 50 2 50 mm flowmeter tube MG VI 1 V1 standard valve MG HRI 1 HR2 high resolution valve R16 201 N10A 1 Pressure Regulator 13 January 2004 ot MOISTURE GENERATOR VERT VALVE bhv Gas wat gas WET aas DAY gas DILUTION DILUTED SECOND DILUTION OUTLET mE 12 00 305 Notes 1 Depth 6 00 152 2 Dimensions are in inches millimeters 3 Inlet Outlet and Vent Connections are 1 4 tube fittings Figure 8 MG101 Moisture Generator Outline Dimensions 14 January 2004 Formulas The generated moisture content as determined by the water vapor pressure is calculated from E CELUM aa SE ec Bt Eat W Ect Fi where the generated vapor pressure of water the saturation vapor pressure of water as determined by the water temperature
22. tments slowly being careful not to overshoot the target value DO NOT 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 or dry down again before you can accurately return to a drier value 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 IMPORTANT Be sure to read the steel or glass ball S or G as indicated 10 January 2004 Using Data Table 2 4 By referring to the desired dew frost point temperature in Data cont Table 2 find the corresponding value in either the column headed WET GAS or the column headed WET GAS DILUTED Note that 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 remains 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 or glass ball S or G as indicated After equilibrium is established the MG101 will be delivering a calibration gas with the selected dew frost point temperature When you have complete
23. trics moisture probes The MG101 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 is inherently explosion proof Although specifically designed for calibrating GE Panametrics moisture probes the MG101 can be used for any application requiring accurate and repeatable moisture samples 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 MG101 Moisture Calibrator consists of a pressure regulator four adjustable rotameters flowmeters with valves a saturator bottle a filter a temperature gauge and a vent valve The diagram and explanation on the following page describe how the MG101 works January 2004 E EOADLBDTPe P LLLLLLLLLAAAAAAAALALEELNiLG LDLLLCQUSIB LUEGLLGUG I LLLA A v O 2 Theory of Operation As shown in Figure 1 below dry nitrogen enters at the dry gas inlet A cont passes through the fixed internal pressure regulator and splits into the following three streams B dry gas first dilution C wet gas D dry gas second diluti
24. wo tables not supplied here Data Tables 2 and 3 are sets of calibrations generated at the factory for each MG101 These tables are supplied with the unit You must use these tables to operate the MG101 Since each table is specific to your instrument you cannot use a set from another unit If you lose these tables contact the factory and duplicates will be provided 16 January 2004 nl Table 1 Vapor Pressure of Water Note If the dew frost point is known the table will yield the partial water vapor pressure Py in mm of Hg If the ambient or actual gas temperature is known the table will yield 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 0 4 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 27 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
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