® 922 Airflow Meter Users Manual PN 2683880 November 2006 © 2006 Fluke Corporation, All rights reserved. Printed in Taiwan. All product names are trademarks of their respective companies.
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 conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
Table of Contents Title Page Introduction.................................................................................................. Safety Information and Symbols.................................................................. Contacting Fluke ......................................................................................... Pushbutton Functions.................................................................................. Display .......................................................
922 Users Manual Measuring Differential Pressure ................................................................. Measuring Velocity ..................................................................................... Velocity Measurement ............................................................................ Measuring Flow .......................................................................................... The Setup Menu .........................................................................
List of Tables Table 1. 2. 3. Title Page International Symbols........................................................................... 3 Pushbuttons ......................................................................................... 6 Display Description ..............................................................................
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List of Figures Figure 1. 2. 3. 4. 5. Title Page 922 Airflow Meter ................................................................................. Display ................................................................................................. Differential Pressure Measurement ...................................................... Pitot Tube Connection.......................................................................... Replacing the Batteries. ............................................
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22 Introduction The Fluke 922 Airflow Meter (“the Meter”) is a handheld instrument that measures differential pressure and calculates air velocity and air flow.
922 Users Manual Safety Information and Symbols A [Caution identifies conditions and actions that may damage the Meter. A [Warning identifies conditions and actions that pose hazard(s) to the user. ¥[Warning 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.
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 [ Q" T Description Risk of danger. Important information. Refer to manual. Battery Conforms to EU directives Symbol zA ?" N1040 | Description Recycling information Conforms to Australian standards Do not dispose of this product as unsorted municipal waste. Contact Fluke or a qualified recycler for disposal.
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.
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 Users Manual Table 2. Pushbuttons Pushbutton #" $" %" &" '" (" )" *" +" ," -" ." /" 0" 6 Function Power button. Press to turn the Meter on or off. Hold for 5 seconds to display Meter’s firmware version. Activates velocity mode. See “Measuring Velocity”. Turns the backlight on and off Activates flow mode. See “Measuring Flow”. Displays Average, Max, and Min of stored values Activates live Min Max Avg functions. See “Min Max Avg”.
Airflow Meter Display Display Figure 2 and Table 3 describe the display. 1 2 3 12 4 11 10 5 6 9 8 7 eog01a.eps Figure 2.
922 Users Manual Table 3. Display Description 8 #" Shift key is in use and secondary menu functionality is engaged $" Hold is engaged %" Annunciators showing that sample memory is being accessed and the number of samples &" Indicates that a stored sample (or all samples) is about to be deleted from memory '" Units of pressure, velocity, and flow (" Units of length and temperature )" Digits for temperature and setup parameters *" Duct shape choices +" Low battery indicator.
Airflow Meter Using the Meter Using the Meter Power To turn Meter power on or off, press"9$ 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 1 to turn on the backlight.
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 / with other select pushbuttons to shift to secondary menu modes and functions: • Press /"and"then 6"to access the Clear functions. See “Clearing Sample Data”. • Press /"and"then 7"to access the Recall menu. See “Recall”. • Press /"and"then 5to access the Clear All function. See “Clearing Sample Data”.
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"8. The maximum reading appears first. Each subsequent press of 8 steps through the minimum, average, and live readings, and back to the maximum reading. To exit Min Max mode, press 8for approximately two seconds. When in Min Max mode, the Auto-off feature is automatically disabled.
922 Users Manual 3. Press :, < or 4 for 2 seconds 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 : to enter the pressure mode. 2. Connect a single hose to the "Input (+)" port, leaving the "Ref (-)" port unconnected. 3.
Airflow Meter Measuring Differential Pressure eog05.eps Figure 3.
922 Users Manual Measuring Velocity The Meter uses standard ambient conditions (temperature =21.1 °C/70 °F, barometric pressure = 14.7 psia / 1013 mbar), to approximate actual velocity and flow. Velocity Measurement To measure velocity, do the following: 1. Press < to enter Velocity mode. 2. Connect the hoses to the pitot tube and to the Meter. The “Input (+)” pressure port on the Meter connects to the yellow hose from the total pressure connection of the pitot tube.
Airflow Meter Measuring Velocity eog03.eps Figure 4.
922 Users Manual Measuring Flow 1. Press 4. 2. The Meter requests the duct shape and size. The Meter stores the last duct shape and size that is entered. If the duct is different than the stored version, press 2 or 3 to find the proper duct type for the measurement (rectangular or round). 3. Press 7 to select the duct type. 4. If the duct is rectangular, use 2 and 3 to select the X coordinates and press 7 to store them. Use 2 and 3to select the Y coordinates.
Airflow Meter The Setup Menu Notes HOLD, SAVE, CALCULATE, SHIFT, MIN MAX, ZERO, and SETUP UNITS can be used when measuring pressure, velocity and flow. If :or < is pressed before pressing 7 for the final time, the Meter will escape the flow setup process and will not save any of the selections made or values entered.
922 Users Manual 3. Press"7 to store the change. The Meter beeps to signal that the change has been stored. With each press of 7, the menu moves to the next parameter. To exit the Setup menu without changing subsequent parameters, press :, <, or 4. Clearing Sample Data The Meter stores data that periodically will need to be cleared. Individual samples or the entire data memory can be cleared.
Airflow Meter Recall 3. Press 7 to clear all samples. The Meter beeps and the display shows 0 samples. Recall 1. 2. 3. 4. Press either :, <, or 4 to recall samples for that mode. Press / Press 7 (RECALL) to recall samples. Use 2 and 3 to locate the desired sample. Hold 3 or 2 to increase the rate of change. Press :, <, or 4 to exit the Recall menu Maintenance This section provides basic maintenance information, including battery replacement instructions.
922 Users Manual Replacing the Batteries When the low battery symbol appears (0), the meter will not save samples and “bAtt” appears on the display when 7 is pressed. The Meter uses four AA batteries (supplied). To replace the batteries, do the following (see Figure 5): 1. Turn off the Meter. 2. Remove the holster. 3. Place the Meter face down on a nonabrasive surface and loosen the battery door screw with a Phillips screwdriver. 4. Lift the battery access door away from the Meter. 5.
Airflow Meter Maintenance eog04.eps Figure 5.
922 Users Manual Specifications Parameter Air Pressure Air Velocity Air Flow (Volume) Temperature 22 Range ± 4000 Pascal ± 16 in H2O ± 400 mm H2O ± 40 mbar ± 0.6 PSI 250-16,000 fpm 1-80 m/s 0-99,999 cfm 3 0-99,999 m /hr 0-99,999 l/s 0 to 50 °C 32 to 122 °F Accuracy ±1% + 1 Pascal ±1% + 0.01 in H2O ±1% + 0.1 mm H2O ±1% + 0.01 mbar ±1% + 0.0001 PSI ±2.5% of reading at 2000 fpm (10.00 m/s) accuracy is function of velocity and duct size ±1 % + 2 °C ±1 % + 4 °F Resolution Units Displayed 1 Pascal 0.
Airflow Meter Specifications Operating Temperature Storage Temperature Temperature Coefficient Environmental 0 °C to +50 °C -40 °C to +60 °C 0.
922 Users Manual Agency Approvals T Conforms to EU directives ?"Conforms to Australian standards" N1040 Replacement Parts Replacement Part Battery 1.
Airflow Meter Accessories and Optional Items Accessories and Optional Items Description Item or Part Number Toolpak Meter Hanging Kit Includes: Magnetic Strip, 2 Straps (9 inch and 12 inch), 2 Latch Tabs TPak Fluke 922 Kit Includes: Fluke 922 Airflow Meter, 12 inch pitot tube, TPak Magnetic Strip, TPak Strap, 9 inches, TPak Latch Tab, Four AA Batteries 1.
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Manual Supplement Title: Part Number: Print Date: Revision/Date: 922 Users 2683880 Nov. 2006 Supplement Issue: Issue Date: Page Count: 1 11/06 2 This supplement contains information necessary to ensure the accuracy of the above Instruction Sheet. © 2006 Fluke Corporation. All rights reserved. Printed in the U.S.A.
922 Users Manual Supplement Change #1 On page 6, Table 2, replace item 5 with the following: ' Calculates average of stored values. On page 8, Table 3, replace item11 with the following: - Min Max, and Hold indicators On page 12, replace the first sentence in step 3 with the following: 3. Press 5, :, < or 4 to exit calculate mode. On page 19, add step 4 prior to Recall: 4. To exit (CLEAR) or (CLEAR ALL) without deleting samples, press :, < or 4 before pressing 7.
Manual Supplement 922 Users Change #2, 38872 On page 22, under Specifications, add the following footnote: Use of Zero function is required to achieve these specifications.
