Alnor APM 150, Owner'S Manual, Page: 5 / 78

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TABLE OF CONTENTS
General Description .............................................................................................................. 2
Safety ..................................................................................................................................... 2
Getting Started ...................................................................................................................... 3
Installing Batteries............................................................................................................. 3
Preparing the Instrument................................................................................................... 3
Hood Attachment ........................................................................................................ 3
Alternate Hood Installation ................................................................................................ 5
Standards.......................................................................................................................... 6
Flow Resistance................................................................................................................ 6
Temperature...................................................................................................................... 7
Atmospheric Pressure....................................................................................................... 7
Attaching the Optional Probes (175, 275, 220B) .............................................................. 7
Clearing the Memory......................................................................................................... 7
The Display ............................................................................................................................ 8
Detailed Operation ................................................................................................................ 8
A. APM 150 Keypad and Menus ................................................................................... 10
The APM 150 Keypad ............................................................................................... 10
Primary Key Functions ........................................................................................ 10
Secondary Key Functions ................................................................................... 11
Menu Selections........................................................................................................ 11
Menu Items.......................................................................................................... 11
B. Using the APM 150 ................................................................................................... 12
Basic Functions......................................................................................................... 12
To Change Units ................................................................................................. 12
To Hold a Reading (For storage or printing) ....................................................... 12
Measurement Modes ................................................................................................ 12
Volume Selection ................................................................................................ 12
Data Storage ............................................................................................................. 13
Troubleshooting .................................................................................................................. 14
Maintenance ........................................................................................................................ 15
Appendix A: Traversing a Duct to Determine Average Air Velocity or Volume ............ 15
Where to Take the Measurement.................................................................................... 15
Traversing a Round Duct ................................................................................................ 16
Traversing a Square Duct ............................................................................................... 16
Notice of Disclaimer ........................................................................................................ 17
Appendix B: Time Constant Averaging Technique ......................................................... 17
Appendix C: Serial Communication Using Microsoft
®
Windows
TM
“Terminal” ............ 18
Appendix D: Correction Factors for ThermoAnemometers to Actual Conditions ....... 19
Appendix E: Optional Probes Specifications ................................................................... 20
Service Information ............................................................................................................ 21