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®
922
Airflow Meter
Users Manual
PN 2683880
November 2006 Rev.1, 12/07
© 2006-2007 Fluke Corporation, All rights reserved. Printed in Taiwan. Product specifications are subject to
change without notice. All product names are trademarks of their respective companies.
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LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for two years from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal condi- tions of operation or handling. Resellers are not authorized to extend any other war- ranty on Fluke’s behalf. To obtain service during the warranty period, contact your nearest Fluke autho
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Table of Contents Title Page Introduction..................................................................................................1 Safety Information and Symbols..................................................................2 Contacting Fluke .........................................................................................4 Pushbutton Functions..................................................................................5 Display ..............................
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922 Users Manual Measuring Differential Pressure ................................................................. 12 Measuring Velocity ..................................................................................... 14 Velocity Measurement ............................................................................ 14 Measuring Flow .......................................................................................... 16 The Setup Menu............................................
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List of Tables Table Title Page 1. International Symbols........................................................................... 3 2. Pushbuttons......................................................................................... 6 3. Display Description.............................................................................. 8 iii
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922 Users Manual iv
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List of Figures Figure Title Page 1. 922 Airflow Meter ................................................................................. 5 2. Display................................................................................................. 7 3. Differential Pressure Measurement...................................................... 13 4. Pitot Tube Connection.......................................................................... 15 5. Replacing the Batteries.....................
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922 Users Manual vi
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922 Introduction The Fluke 922 Airflow Meter (“the Meter”) is a handheld instrument that measures differential pressure and calculates air velocity and air flow. The Meter ships with the following items: • Holster • Carrying case • Tubing and tubing strap • Four AA Batteries (installed) • Users Manual • Wrist Strap 1
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922 Users Manual Safety Information and Symbols A WCaution identifies conditions and actions that may damage the Meter. A WWarning identifies conditions and actions that pose hazard(s) to the user. XWWarning To avoid injury, or damage to the Meter, follow these safety guidelines: • Read the entire Users Manual before using the Meter. • Use the Meter only as described in the Users Manual or the protection provided by the meter may be impaired. • Inspect the Meter before use. Do not use
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Airflow Meter Safety Information and Symbols International symbols used on the Meter and in the manual are explained in Table 1. Table 1. International Symbols Symbol Description Symbol Description Risk of danger. Important Recycling information W v= information. Refer to manual. Battery Conforms to Australian standards M ; Do not dispose of this product as unsorted Conforms to EU directives municipal waste. Contact Fluke or a ~ P qualified recycler for disposal. 3
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922 Users Manual Contacting Fluke To contact Fluke, use one of the following telephone numbers: USA: 1-888-99-FLUKE (1-888-993-5853) Canada: 1-800-36-FLUKE (1-800-363-5853) Europe: +31 402-675-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-446-5500 Or visit Fluke’s Web site at: www.fluke.com. Register the Meter at: http://register.fluke.com 4
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Airflow Meter Pushbutton Functions Pushbutton Functions Figure 1 and Table 2 explain the Meter’s pushbuttons. 2 1 3 14 4 13 5 6 12 7 11 10 8 9 eog02.eps Figure 1. 922 Airflow Meter 5
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922 Users Manual Table 2. Pushbuttons Pushbutton Function Power button. Press to turn the Meter on or off. Hold for 5 seconds to display Meter’s A firmware version. B Activates velocity mode. See “Measuring Velocity”. Turns the backlight on and off. C D Activates flow mode. See “Measuring Flow”. Calculates average of stored values. E F Activates live Min Max Avg functions. See “Min Max Avg”. G Used to increase manual inputs, scroll through memory, and to navigate the Setup menu. H
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Airflow Meter Display Display Figure 2 and Table 3 describe the display. 12 3 12 4 11 10 5 6 9 8 7 eog01a.eps Figure 2. Display 7
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922 Users Manual Table 3. Display Description A Shift key is in use and secondary menu functionality is engaged B Hold is engaged C Annunciators showing that sample memory is being accessed and the number of samples D Indicates that a stored sample (or all samples) is about to be deleted from memory E Units of pressure, velocity, and flow F Units of length and temperature G Digits for temperature and setup parameters H Duct shape choices Low battery indicator. Replace the battery as
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Airflow Meter Using the Meter Using the Meter Power To turn Meter power on or off, press O Meter power is provided by four AA batteries. To replace the batteries, see “Maintenance”. Measurement Units The Meter supports both Metric and US measurement units. Select the desired measurement type using the Setup menu. See “The Setup Menu”. Note If any measured value of any parameter is above the specified range, the Meter shows “OL”. Backlight Press C to turn on the backlight. The ba
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922 Users Manual Temperature Ambient temperature is displayed on the Meter as a reference. The temperature can be displayed in either °C or °F. See "The Setup Menu". Secondary Menu Modes Use A with other select pushbuttons to shift to secondary menu modes and functions: • Press A and then H to access the Clear functions. See “Clearing Sample Data”. • Press A and then I to access the Recall menu. See “Recall”. • Press A and then Gto access the Clear All function. See “Clearing Sample D
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Airflow Meter Saving Samples intermittent readings, record maximum and minimum readings while you are away or when you cannot watch the Meter. To use Min Max mode, press M. The maximum reading appears first. Each subsequent press of M steps through the minimum, average, and live readings, and back to the maximum reading. To exit Min Max mode, press Mfor approximately two seconds. When in Min Max mode, the Auto-off feature is automatically disabled. Hold Pressing H captures the cur
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922 Users Manual 3. Press G, P, V or F to exit calculate mode. If the memory is full (99 samples have been stored), more samples cannot be stored. If the user attempts to store another sample, the Meter flashes "Full" and does not save new readings. Measuring Differential Pressure To measure differential pressure, do the following, see Figure 3: 1. Press P to enter the pressure mode. 2. Connect a single hose to the "Input (+)" port, leaving the "Ref (-)" port unconnected. 3. With the tu
