Fluke 922 User 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.
922
Airflow Meter
Users Manual

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 authorized service center to obtain return authorization information, then
send the product to that Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS
FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE
IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUEN-
TIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since
some states or countries do not allow the exclusion or limitation of an implied warranty
or of incidental or consequential damages, this limitation of liability may not apply to
you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99

i
Table of Contents
Title Page
Introduction..................................................................................................1
Safety Information and Symbols..................................................................2
Contacting Fluke .........................................................................................4
Pushbutton Functions..................................................................................5
Display ........................................................................................................7
Using the Meter...........................................................................................9
Power ......................................................................................................9
Measurement Units..................................................................................9
Backlight ..................................................................................................9
Automatic Power Off................................................................................9
Temperature ............................................................................................10
Secondary Menu Modes..........................................................................10
Zero .........................................................................................................10
Min Max Avg............................................................................................10
Hold .........................................................................................................11
Saving Samples ..........................................................................................11

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Measuring Differential Pressure ................................................................. 12
Measuring Velocity ..................................................................................... 14
Velocity Measurement ............................................................................ 14
Measuring Flow .......................................................................................... 16
The Setup Menu......................................................................................... 17
Clearing Sample Data ................................................................................ 18
Recall ......................................................................................................... 19
Maintenance............................................................................................... 19
Cleaning.................................................................................................. 20
Replacing the Batteries........................................................................... 20
Specifications ............................................................................................. 22
Agency Approvals................................................................................... 24
Replacement Parts..................................................................................... 24
Accessories and Optional Items ................................................................. 25

iii
List of Tables
Table Title Page
1. International Symbols........................................................................... 3
2. Pushbuttons ......................................................................................... 6
3. Display Description .............................................................................. 8

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v
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. ....................................................................... 21

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Users Manual
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1
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

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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 it if it appears damaged.
•The Meter contains no user-serviceable parts. Do not open the Meter.
For service, the Meter must be sent to Fluke. See “Contacting Fluke”.
•Have the Meter serviced only by qualified service personnel.
•Adhere to local and national safety codes. Individual protective
equipment must be used to prevent injury.
WCaution
To avoid possible damage to the Meter, avoid using the Meter in an
excessively dirty or dusty atmosphere. Excessive particle intake can
damage the Meter.

Airflow Meter
Safety Information and Symbols
3
International symbols used on the Meter and in the manual are explained in Table 1.
Table 1. International Symbols
Symbol Description Symbol Description
WRisk of danger. Important
information. Refer to manual. v= Recycling information
M Battery ;Conforms to Australian standards
PConforms to EU directives ~Do not dispose of this product as unsorted
municipal waste. Contact Fluke or a
qualified recycler for disposal.

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Users Manual
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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: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]
Or visit Fluke’s Web site at: www.fluke.com.
Register the Meter at: http://register.fluke.com

Airflow Meter
Pushbutton Functions
5
Pushbutton Functions
Figure 1 and Table 2 explain the Meter’s pushbuttons.
1
14
13
12
11
10
9
2
3
4
5
6
7
8
eog02.eps
Figure 1. 922 Airflow Meter

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Users Manual
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Table 2. Pushbuttons
Pushbutton Function
A Power button. Press to turn the Meter on or off. Hold for 5 seconds to display Meter’s
firmware version.
B Activates velocity mode. See “Measuring Velocity”.
C Turns the backlight on and off.
D Activates flow mode. See “Measuring Flow”.
E Calculates average of stored values.
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 Press and hold 2 seconds to zero out the display before taking readings.
I Used to decrease manual inputs, scroll through memory, and to navigate the Setup menu.
J Press to enter the Setup menu. See “The Setup Menu”.
K Used to access secondary features listed in yellow on the Meter.
L Used to store data and accept changes to the setup menu and flow parameters.
M Holds the present reading.
N Activates pressure mode. See “Measuring Differential Pressure”.

Airflow Meter
Display
7
Display
Figure 2 and Table 3 describe the display.
12 3
5
6
7
10
12
8
4
9
11
eog01a.eps
Figure 2. Display

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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
I Low battery indicator. Replace the battery as soon as the low battery indicator appears.
J Digits for main measurements of pressure, velocity, and flow
K Min Max and Hold indicators
L Pressure, Velocity, or Flow modes are active

Airflow Meter
Using the Meter
9
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 Cto turn on the backlight. The backlight automatically turns off after 2 minutes.
Automatic Power Off
To conserve battery power, the Meter changes to sleep mode after 20 minutes of inactivity.
To turn the Meter back on, press O. To disable automatic power off, turn the meter on
while simultaneously holding Oand Cuntil the display shows APO OFF. Repeat this
procedure to re-enable this feature. The display shows APO ON.

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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 Awith 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
Data”.
Zero
To zero differential pressure, velocity or flow, have both pressure ports open to ambient
conditions, then, press and hold Zfor 2 seconds. Upon zeroing, the meter beeps.
Min Max Avg
The Min Max mode stores live minimum (MIN) and maximum (MAX) input values. When the
input drops below the stored minimum value or above the stored maximum value, the Meter
beeps and stores the new value. Min Max mode also calculates an average (AVG) of all
readings taken since the mode was activated. This mode can be used to capture

Airflow Meter
Saving Samples
11
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 Msteps 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 Hcaptures the current reading and holds it on the display. If His pressed
while in Min Max mode, the reading is held on the display and Min Max mode continues to
store minimum and maximum values.
Saving Samples
The Meter saves various samples in its three major modes. To save a sample, do the
following:
1. When taking a sample, press I to store the sample. The Meter can save up to 99
samples in each of its three modes.
2. Once the samples are taken, press Gto view the average of all the samples.

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3. Press G, P, Vor Fto 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 Pto enter the pressure mode.
2. Connect a single hose to the "Input (+)" port, leaving the "Ref (-)" port unconnected.
3. With the tubing open to ambient conditions press and hold Zfor 2 seconds.
4. Place the input hose in a different zone than the Meter.
5. The Meter displays the differential pressure of the input zone with respect to the
reference zone. For instance, a positive reading means that the input zone is positively
pressured with respect to the Meter location or its reference zone.