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Model 303B

Moisture Monitor

User Manual

Process Instruments

455 Corporate Boulevard

Newark, DE 19702

PN 303230001 , Rev. U

Summary of Contents for 303B

Page 1: ...Model 303B Moisture Monitor User Manual Process Instruments 455 Corporate Boulevard Newark DE 19702 PN 303230001 Rev U...

Page 2: ...CTURING USA Delaware 455 Corporate Blvd Newark DE 19702 Tel 302 456 4400 Fax 302 456 4444 USA Oklahoma 2001 N Indianwood Ave Broken Arrow OK 74012 Tel 918 250 7200 Fax 918 459 0165 USA Pennsylvania 15...

Page 3: ...ring 1 5 Interfering 1 5 Contaminating 1 5 Parameters Affecting Operation 1 6 Flow Calibration 1 6 Density 1 6 Pressure 1 7 Cell 1 8 Alarm Relay 1 8 Special Functions 1 9 Cell Test 1 9 Electrical Test...

Page 4: ...ion 4 2 Flow Doublling Technique 4 2 Chapter 5 Maintenance General 5 1 Moisture Monitor Interior View 5 2 Parts Replacement 5 3 Flow Controller 5 3 Power Supply PC Board 5 3 Main AC Fuse 5 4 Battery 5...

Page 5: ...A Conversion Chart Dew Point A 1 Notes A 1 Appendix B Nomogram Conversion to Relative Humidity B 1 Appendix C Nomogram Dew Point with Pressure B 1 Appendix D Glossary of System Conditions Appendix E...

Page 6: ...vi 303B Moisture Analyzer Manual 303B Moisture Monitor...

Page 7: ...zardous chemicals or adverse health factors affect the environment or use of the equipment appropriate precautions are provided Service operations given or implied in this manual should be performed o...

Page 8: ...o the environment and to conserve our natural resources AMETEK recommends that you arrange to recycle this product when it reaches its end of life Waste Electrical and Electronic Equipment WEEE should...

Page 9: ...ECTER L EQUIPEMENT COUPER LE COURANT OU S ASSURER QUE L EMPLACMENT EST DESIGNE NON DANGEREUX Warning If This Equipment is to Be Operated in a Class I Div 2 area the Use of the External 12 Vdc Power In...

Page 10: ...ed State a statement should appear on the documentation accompanying the equipment being returned declaring that the goods being returned for repair are American goods the name of the firm who purchas...

Page 11: ...en membrane key switches ten windows to view LED s that show the status of the various functions two trans parent windows to view the flow meters and the output display and two access holes for flow a...

Page 12: ...ant the displayed reading corresponds exactly and linearly to ppm of water vapor in the sample The two most common installation errors are in selecting improper sizes and materials for sample lines an...

Page 13: ...lastics or elasto mer materials are unsatisfactory because of their relatively high moisture permeability All tubing should be minimum length 3 m 10 ft and ID 3 2 mm 0 128 in 1 8 in OD is recommended...

Page 14: ...1 4 303B Moisture Analyzer Manual Figure 1 2 303B Flow Diagram 50 VDC...

Page 15: ...read artificially high On air for example it may read up to 10 percent high This is caused by the electrolysis of moisture formed by recombination of free hydrogen or oxygen A recommended flow doublin...

Page 16: ...s are not high precision devices and are to be used exclusively as flow indicators We suggest the operator use a relatively high precision flow meter such as a bubble o meter soap bubble flow meter to...

Page 17: ...he instrument corresponds to 100 mL min at 1 atmosphere and 25 C Temperature A change in sample temperature does not affect the way the instrument measures moisture It does however affect gas density...

Page 18: ...s absorbed and electrolyzed producing a constant current When flow is increased electrolyzing current increases proportionally Current is directly and linearly related to mass flow and can be calculat...

Page 19: ...f Power Open Closed Special Functions Cell Test Display Cell Voltage Level The cell test function verifies that the cell power supply is operating properly The voltage level of the 50VDC 70 mA cell po...

Page 20: ...tches to the battery Power use is minimized to maximize battery life so that the cell can be maintained dry as long as possible To save battery power the 303B should whenever possible be plugged into...

Page 21: ...oisture reading would change to 5 54 lb mmscf The formulas above can be simplified to the following if you plan on us ing only the gain and offset Displayed_moisture_value Actual_moisture_value gain o...

Page 22: ...e gain can be in creased from 1 0 to 2 0 causing the display to increase back to 112 0 ppm The same can be applied in reverse For a 4 75 lb mmscf reading at 100mL min and increasing the flow to 200 mL...

Page 23: ...lations are Actual ppm Values 50 ppm and 100 ppm Mapped into Values 0 ppm and 100 ppm Map_high Map_low Gain Act_high Act_low Gain 100 0 100 50 100 50 2 0 Offset Gain Act_low Map_low 2 0 50 0 100 0 Sin...

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Page 25: ...psi gauge Calibrated Flow Rate Adjustment Sample 25 to 250 mL min Bypass 50 to 1000 mL min Nominal Sample Flow Rate 100 mL min at 1 atmosphere with air or a comparable unit of sample Nominal Bypass Fl...

Page 26: ...ution Power Supply AC 100 130 Vac 47 63 Hz 20W 200 260 Vac 47 63 Hz 20W Factory Configured DC 12 14 Vdc external and internal 20W Max ext Enclosure Classification NEMA 3R Dimensions 34 3 cm 13 5 in de...

Page 27: ...ons UL CSA General Safety Requirements Class 1 Division 2 Groups ABCD T4A Electromagnetic Compatibility Directive EN61326 1 Industrial Low Voltage Directive EN61010 1 Pressure Equipment Directive Comp...

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Page 29: ...nnect it to a sample source Refer to Appendices B and C for additional sampling considerations and parameters affecting operation Inspection Inspect the instrument for damage It is the user s responsi...

Page 30: ...rd pre terminated at the unit For European and other overseas products this cable will be of the CENELEC Harmonized type In addition the wire size will be 82 mm2 or equivalent for 10 amp use and have...

Page 31: ...be sized to accommodate the requirements stated on the rear of the unit This device must be in close proximity to the equipment as to be in easy reach of the operator This device must be marked as the...

Page 32: ...ground vehicle only The value of this fuse should be 1A minimum with a voltage rating of 18Vor greater This external connection is not intended to be energized by devices such as DC power supplies bat...

Page 33: ...e software revision number P X XX With POWER ON and no sample flow electrolysis will gradually dry the cell 2 Press the CELL TEST key The CELL TEST and an ANALOG RANGE key LED will flash and the displ...

Page 34: ...gases refer to Appendix E for correction factors 5 Set the SAMPLE ADJUST so that the external flow meter indicates 100 mL min at 25 C 77 F and 1 atmosphere 6 Note the reading on the 303B internal flo...

Page 35: ...B An AMETEK pump PN 271803001 or 271813001 240V can be used in either configuration Keep in mind that some pressure pumps will add moisture to the sample If you plan to run your monitor with a vacuum...

Page 36: ...3 8 303B Moisture Analyzer Manual Figure 3 2 Interconnection Diagram illustration...

Page 37: ...Installation 3 9 Figure 3 3 Proper and Improper Grounding Methods...

Page 38: ...ppens 4 Connect the bottom Y inlet port to a gas source with rubber or plastic tubing 5 Measure the gas flow rate by carefully squeezing the bulb to form a single bubble and with a stopwatch timing it...

Page 39: ...Installation 3 11 Figure 3 4 Bubble O Meter PN 303030006...

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Page 41: ...rm set point entries key Minus key decrements value selections Not applicable for gain offset factory gain and alarm setpoint entries DISPLAY LIGHT key Back lights the display for about 1 minute As ne...

Page 42: ...off 3 Press the desired ANALOG RANGE key The LED of the selected RANGE will turn ON Transportation When the instrument is being moved from place to place cap the GAS IN and OUT fittings to prevent moi...

Page 43: ...in the instrument range Generally the error resulting from air or oxygen streams can be as high as 10 percent Use the following technique to reduce this effect 1 Adjust sample flow to 100 mL min and n...

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Page 45: ...ns given or implied in this section should be performed only by AMETEK or other qualified personnel There are no operator replaceable parts internal to the unit General Frequency of analyzer maintenan...

Page 46: ...5 2 303B Moisture Analyzer Manual Figure 5 1 Moisture Monitor Interior View...

Page 47: ...asier 7 Be sure the glass tube is centered on the top and bottom seals and the grounding wire is around the tube before tightening the top plug Do not tighten the screws on the plastic cover or the co...

Page 48: ...ply pc board Battery Figure 5 1 1 To gain access perform steps 1 2 and 3 above under Flow Meter Tubes section 2 Remove the wire terminals from the battery Note that red wire is on terminal 3 Remove th...

Page 49: ...nd disconnect the gas source from the IN fitting 4 After 60 minutes note the pressure It should not drop more than 34 kPa 5 psi gauge 5 If pressure test is satisfactory remove the gauge shutoff valve...

Page 50: ...displayed voltage is not between 4 7 and 5 3 replace the power supply board Output Test to check the 4 to 20 mA output Disconnect the leads from JP1 1 and 2 and attach a dc voltmeter in their place to...

Page 51: ...cond rate Observing the sequence closely lets you see if any LED or segment is not working Although the POWER and AC POWER LED s are not part of the sequence they will be ON whenever the monitor is co...

Page 52: ...store the value ProG will be displayed until the value is stored followed by the normal LED display test If the ALARM CELL TEST 0 1000 50 0 2000 100 or DISPLAY LIGHT key is pressed during the routine...

Page 53: ...oth ELEC TEST and STAND BY keys LED s ON and press the POWER key LED ON until the STANDBY ELEC TEST and LEDs flash 2 Press the or key to increment or decrement the display to the de sired value 3 When...

Page 54: ...orted cell Replace the cell noisy Varying sample flow Replace the flow regulator Intermittent short Replace the cell Faulty power supply board Replace power supply board Display reading low on Low gas...

Page 55: ...offset adjust mode display shows offset value In factory gain adjust mode display shows fac tory gain value In alarm adjust mode dis play shows alarm setpoint Instandby batterypower save mode Correcti...

Page 56: ...G RANGE LEDs flashing CELL TEST and any one ANALOG RANGE LEDs flashing Analyzer will not turn off in battery mode Possible Cause In electrical test mode In cell test mode Low Battery Corrective Action...

Page 57: ...ber USA HEADQUARTERS 150 Freeport Road Pittsburgh PA 15238 Phone 412 828 9040 Fax 412 826 0399 USA Delaware 455 Corporate Boulevard Newark Delaware 19702 Phone 302 456 4400 Fax 302 456 4444 USA Texas...

Page 58: ...t Panel Overlay LB MMSCF 303211902 3 1 Back Panel Overlay 120 V 303212901 3 1 Back Panel Overlay 240V 303212902 5 1 Battery 12 V 5 Amp Hour 203626001 Battery Bracket 303213003 5 1 303B Rotometer Assy...

Page 59: ...ACUUM PRESSURE PUMP 240V 271813001 6 1 COALESCING OIL FILTER 303165901 6 1 PRESSURE REDUCER 510150901 HEATED PRESSURE REDUCER 259889003 230 V DIV 1 HEATED PRESSURE REDUCER 115 V DIV 1 259890003 HEATED...

Page 60: ...6 4 303B Moisture Analyzer Manual Figure 6 1 Accessories...

Page 61: ...See figure C 1 for relationship at other pressures 2 The graph relates absolute moisture levels as obtained on the 303B to dew point in either F or C 3 To convert ppm to lb mmscf multiply the ppm val...

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Page 63: ...Appendix B B 1 Appendix B Figure B 1 Nomogram Conversion of PPm H2 0 to Relative Humidity...

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Page 65: ...Appendix C C 1 Appendix C Figure C 1 Nomogram Determination of Dew Point with Pressure...

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Page 67: ...o that re coating is necessary Water Hang Up Water trapped or absorbed onto the system walls or fittings Tramp Water Water which has entered a sample stream from a source other than the source being s...

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Page 69: ...rection Factors Approximate Argon 0 85 Butadiene 0 73 Butane 0 71 Carbon Monoxide 1 01 Ethane 0 98 Ethylene 1 02 F 22 0 58 F 12 0 49 134A 0 53 Helium 2 69 Isobutane 0 71 Isobutylene 0 72 Methane s 1 3...

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