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Related Manuals for Alnor 9850
Summary of Contents for Alnor 9850
- Page 1 Thermo-Anenometer Model 9850 Owner’s Manual UL LISTED INTRINSICALLY SAFE FOR USE IN HAZARDOUS LOCATIONS FOR CLASS I GROUPS C AND D, CLASS II GROUPS E, F, AND G, AND CLASS III, ONLY WHEN USED WITH THE FOLLOWING BATTERY TYPES: EVEREADY 522;...
- Page 2 SAFETY NOTICE All normal precautions must be observed when operating the Model 9850 Thermo- Anemometer near moving equipment such as motors and blowers. Exercise care to ensure that the probe or instrument does not interfere with any moving equipment. WARNING The operational temperature range of the probe must not be exceeded.
- Page 3 LIMITATION OF WARRANTY AND LIABILITY Seller warrants that this product, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for a period of twenty-four (24) months, or the length of time specified in operator's manual, from the date of shipment to the customer.
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Page 4: Table Of Contents
TABLE OF CONTENTS General Description.........1 Operation..........2 Calibration ..........4 Maintenance..........7 List of Models/Parts.........9 Specifications ........10 Theory of Operation ......12 Performance Check.......13 Service and Repair........14 Service Information .......15... -
Page 5: General Description
GENERAL DESCRIPTION The Model 9850 Thermo-Anemometer is a pocket-sized, battery operated, analog readout, portable instrument capable of measuring air velocities from 20 to 2000 FPM (0.1 to 10 m/s) in two ranges. The instrument is designed with a 3-inch retractable probe... -
Page 6: Operation
OPERATION 1. Before using instrument, the battery must be installed. This is accomplished by sliding the battery cover on the back of the instrument (near the bottom) away from the case. Once battery compartment is opened, a 9-volt battery can be clipped to the battery strap. - Page 7 remaining battery life. If the needle rests in the narrow portion of the battery line, plans for battery replacement should be made in the near future. 4. Place anemometer in the air flow to be measured, and slide switch on top of instrument to the HIGH position.
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Page 8: Calibration
CALIBRATION The 9850 T/A is calibrated by first setting the zero reading mechanically and electrically, and then setting the low range span and high range span. This procedure should only be attempted by persons who have the proper equipment. Any attempt at recalibrating voids all calibration certification provided with the instrument. - Page 9 Zero Adjustment 1. Mechanically Turn instrument to OFF position and using a screw driver turn screw in front of instrument so the meter needle is lined up with the zero picket. 2. Electrically Turn instrument to the LO position. Cover probe sensor window to prevent any air flow and turn the ZERO adjustment screw on the left hand side of the instrument until...
- Page 10 High Span Adjustment Set instrument in the wind tunnel with the probe positioned so that the air flow is in the direction of the arrow on the probe. Set instrument to the HI position. Set the wind tunnel to 2000 FPM (10 m/s) and turn the HSPAN adjustment screw on the left hand side of the instrument until the meter needle lines up with the full-scale mark.
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Page 11: Maintenance
MAINTENANCE The Model 9850 Thermo-Anemometer is manufactured with solid state components. Thus no maintenance is required, other than periodic checking that the instrument and probe are clean and not damaged. Cleaning Meter Window: Clean with liquid eyeglass cleaner. Do not use abrasives or solvents. - Page 12 Battery Corrosion: Examine battery at least every two months for signs of corrosion. To access battery, follow instructions in OPERATION section. Remove battery if there are any signs of corrosion or moisture. Clean the battery connectors and any other affected parts with a clean cloth moistened with water only.
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Page 13: List Of Models/Parts
ONLY the following battery types: Eveready 522; Duracell MN1604; Radio Shack 23-553. LIST OF MODELS AND PARTS Part No. Description 634-210-100 9850 Analog Thermo- Anemometer (marked in FPM) 634-210-115 9850 Analog Thermo- Anemometer (marked in meters/sec) 346-028-003... -
Page 14: Specifications
SPECIFICATIONS Velocity Ranges English Units Low Range 0 - 300 FPM High Range 0 - 2000 FPM Metric Units Low Range 0 - 1.5 meters/sec. High Range 0 - 10.0 meters/sec. Accuracy +3% of reading, +1% of full scale Accuracy is specified within an ambient temperature range of 68-86 F (20-30 C) Scale Divisions... - Page 15 Dimensions Instrument Case 4.75x2.75x1.125 in. (120x70x28 mm) Probe Length 3 in, extended (76mm) Diameter 312 in. (8 mm) Weight 8 ounces (225 grams) Battery 9VAlkaline Eveready 522 Duracell MN1604 Radio Shack 23-533 Battery 15 hours minimum -11-...
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Page 16: Theory Of Operation
THEORY OF OPERATION Sensors Two thermistors are used, positioned at the end of the probe and exposed to the air stream to be measured. One senses the ambient temperature of the air stream. The other is then heated by the circuit above ambient. As air passes over this heated thermistor it produces a cooling effect proportional to the air flow (velocity) and a change in voltage... -
Page 17: Performance Check
PERFORMANCE CHECK When checking performance, always start by verifying that the meter reads zero with the probe retracted into the case. Also check the battery voltage by reading the meter when the instrument is switched to the BATT position. Do not attempt to adjust any of the calibration potentiometers unless access to a properly calibrated wind tunnel test facility is available. -
Page 18: Service And Repair
SERVICE AND REPAIR Service and Repair Please return your Product Registration Card immediately. This allows us send you service reminders, special offers, and important information about your product. Before sending your instrument for calibration or repair, you should call Customer Service. The Service Department will provide you with the cost of service or calibration, Return Material Authorization (RMA) number, and shipping instructions. -
Page 19: Service Information
SERVICE INFORMATION Contact TSI Incorporated directly, before returning your instrument. See INSTRUCTIONS FOR RETURN. Follow the procedure carefully as it will expedite processing. Failure to follow the procedure may cause return of the unit unrepaired. Send your instrument to the factory transportation prepaid. To assure fast turn-around time, photocopy and fill out this form with as much detail as possible and attach it to the instrument. - Page 20 7. __________ 8. ___________ 9. ___________ 10. __________ 11. ___________ 12. ___________ Notes: ____________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ TSI Incorporated Alnor Products 500 Cardigan Road Shoreview, MN 55126 USA Toll Free (800) 424-7427 September 2003 Telephone (651) 490-2811 Fax (651) 490-3824 Printed in USA www.alnor.com...