CFM-88L 07/20/09i
CONTENTS
1.0 INTRODUCTION 1
1.1 GENERAL DISCUSSION 1
2.0 SPECIFICATIONS 2
3.0 EXTERNAL FEATURES 3
3.1 KEYPAD 3
3.2 FEATURES ON SIDES AND BACK OF METER 3
4.0 DISPLAY MESSAGES AND PROMPTS 5
4.1 READ PROMPTS 5
4.2 MEASUREMENT READOUTS 5
4.3 FUNCTION READOUTS 5
5.0 USING THE AIRDATA FLOWMETER 9
5.1 GENERAL USE 9
5.2 TREND READINGS 9
6.0 TEMPERATURE MEASUREMENT 10
6.1 TEMPROBE 10
6.2 AIRDATA MULTITEMP 10
7.0 ABSOLUTE PRESSURE 12
8.0 AIR FLOW MEASUREMENT 13
8.1 FLOWHOOD FUNCTION 13
8.2 BACKPRESSURE COMPENSATION 13
9.0 FLOWHOOD ASSEMBLY 14
9.1 UNPACKING 14
9.2 FRAME ASSEMBLIES 14
9.3 FABRIC TOPS 14
9.4 TOP SUPPORT ASSEMBLY 14
9.5 HANDLE 15
10.0 FLOWHOOD OPERATING PROCEDURE 20
10.1 AIR FLOW - NONBACKPRESSURE COMPENSATED READINGS 20
10.2 AIR FLOW - BACKPRESSURE COMPENSATED READINGS 20
10.2.1 RATIO ERR DISPLAY 21
11.0 SPECIAL BALANCING PROCEDURES 22
11.1 PROPORTIONAL BALANCING 22
11.2 LARGE RETURN AIR GRILLES 22
11.3 KITCHEN EXHAUST HOODS 22
11.4 CONSTANT VOLUME CONTROLLERS 22
11.5 LINEAR SLOT DIFFUSERS 22
11.6 SIDEWALL REGISTERS 22
11.7 14"x14"x14" SHORT TOP SET 23
11.8 SYSTEM PROBLEMS 23
12.0 CORRECTION FACTORS AND CONVERSION FORMULAS 24
12.1 BAROMETRIC PRESSURE DENSITY CORRECTION - LOCAL DENSITY 24
12.2 BAROMETRIC PRESSURE DENSITY CONVERSION - STANDARD DENSITY 24
12.2.1 STANDARD DENSITY - TEMPROBE USED 24
12.2.2 STANDARD DENSITY - TEMPROBE NOT USED 24
12.3 TEMPERATURE DENSITY CORRECTION 24
12.4 RELATIVE HUMIDITY CORRECTION 24
13.0 METER ACCURACY FIELD TESTING 25
13.1 METER ZERO FUNCTION 25
13.2 ABSOLUTE PRESSURE FUNCTION 25
13.3 AIR FLOW ACCURACY 25
13.4 DUCT TRAVERSE COMPARISONS - INCLINED MANOMETER OR MICROMANOMETER 25
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