Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
4.1 Symbols
4.2 Subscripts
5 General
6 Instruments for pressure measurement
6.1 Barometers
6.2 Manometers
6.3 Damping of manometers
6.4 Checking of manometers
6.5 Position of manometers
7 Determination of average pressure in an airway
7.1 Methods of measurement
7.2 Use of wall tappings
7.3 Construction of tappings
7.4 Position and connections
7.5 Checks for compliance
7.6 Use of Pitot-static tube
8 Measurement of temperature
8.1 Thermometers
8.2 Thermometer location
8.3 Humidity
9 Measurement of rotational speed
9.1 Fan shaft speed
9.2 Acceptable instruments
10 Determination of power input
10.1 Measurement accuracy
10.2 Fan shaft power
10.3 Determination of fan shaft power by
electrical measurement
10.4 Impeller power
10.5 Transmission systems
11 Measurement of dimensions and determination of areas
11.1 Flow-measurement devices
11.2 Tolerance on dimensions
11.3 Determination of cross-sectional area
12 Determination of air density, humid gas constant
and viscosity
12.1 Density of air in the test enclosure at section x
12.2 Determination of vapour pressure
12.3 Determination of air viscosity
13 Determination of flow rate
13.1 General
13.2 In-line flowmeters (standard primary devices)
13.3 Traverse methods
14 Calculation of test results
14.1 General
14.2 Units
14.3 Temperature
14.4 Mach number and reference conditions
14.5 Fan pressure
14.6 Calculation of stagnation pressure at a reference
section of the fan from gauge pressure, p[ex']
measured at a section x of the test duct
14.7 Inlet volume flow rate
14.8 Fan air power and efficiency
15 Rules for conversion of test results
15.1 Laws on fan similarity
15.2 Conversion rules
16 Fan characteristic curves
16.1 General
16.2 Methods of plotting
16.3 Characteristic curves at constant speed
16.4 Characteristic curves at inherent speed
16.5 Characteristic curves for adjustable-duty fan
16.6 Complete fan characteristic curve
16.7 Test for a specified duty
17 Uncertainty analysis
17.1 Principle
17.2 Pre-test and post-test analysis
17.3 Analysis procedure
17.4 Propagation of uncertainties
17.5 Reporting uncertainties
17.6 Maximum allowable uncertainties measurement
17.7 Maximum allowable uncertainty of results
18 Selection of test method
18.1 Classification
18.2 Installation categories
18.3 Test report
18.4 User installations
18.5 Alternative methods
18.6 Duct simulation
19 Installation of fan and test airways
19.1 Inlets and outlets
19.2 Airways
19.3 Test enclosure
19.4 Matching fan and airway
19.5 Outlet area
20 Carrying out the test
20.1 Working fluid
20.2 Rotational speed
20.3 Steady operation
20.4 Ambient conditions
20.5 Pressure readings
20.6 Tests for a specified duty
20.7 Tests for a fan characteristic curve
20.8 Operating range
21 Determination of flow rate
21.1 Multiple nozzle
21.2 Conical or bellmouth inlet
21.3 Orifice plate
21.4 Pilot-static tube traverse
22 Determination of flow rate using multiple nozzles
22.1 Installation
22.2 Geometric form
22.3 Inlet zone
22.4 Multiple-nozzle characteristics
22.5 Uncertainty
23 Determination of flow rate using a conical or
bellmouth inlet
23.1 Geometric form
23.2 Screen loading
23.3 Inlet zone
23.4 Conical inlet performance
23.5 Bellmouth inlet performance
23.6 Uncertainties
24 Determination of flow rate using an orifice plate
24.1 Installation
24.2 Orifice plate
24.3 Ducts
24.4 Pressure tappings
24.5 Calculation of mass flow rate
24.6 Reynolds number
24.7 In-duct orifice with D and D/2 taps
24.8 Outlet orifice with wall tappings
25 Determination of flow rate using a Pitot-static
tube traverse
25.1 General
25.2 Pitot-static tube
25.3 Limits of air velocity
25.4 Location of measurement points
25.5 Determination of flow rate
25.6 Flow rate coefficient
25.7 Uncertainty of measurement
26 Installation and setup categories
26.1 Category A: free inlet and free outlet
26.2 Category B: free inlet and ducted outlet
26.3 Category C: ducted inlet and free outlet
26.4 Category D: ducted inlet and ducted outlet
26.5 Test installation type
27 Flow straighteners
27.1 Types of straightener
27.2 Rules for use of a straightener
28 Common-segment airways for ducted fan installations
28.1 Common segments
28.2 Common segment at fan outlet
28.3 Common segment at fan inlet
28.4 Outlet duct simulation
28.5 Inlet duct simulation
28.6 Loss allowances for standardized airways
29 Standardized test chambers
29.1 Test chamber
29.2 Variable supply and exhaust systems
29.3 Standardized inlet test chambers
29.4 Standardized outlet test chambers
30 Standard methods with test chambers - Category A
installations
30.1 Types of fan setup
30.2 Inlet-side test chambers
30.3 Outlet-side test chambers
31 Standard test methods with outlet-side test ducts -
Category B installations
31.1 Types of fan setup
31.2 Outlet-side test ducts with antiswirl device
31.3 Outlet chamber test ducts without antiswirl device
32 Standard test methods with inlet-side test ducts or
chambers - Category C installations
32.1 Types of fan setup
32.2 Inlet-side test ducts
32.3 Inlet-side test chambers
33 Standard methods with inlet- and outlet-side test
ducts - Category D installations
33.1 Types of fan setup
33.2 Installation category B with outlet antiswirl
device and with an additional inlet duct or
inlet-duct simulation
33.3 Installation category B without outlet antiswirl
device nor common segment, modified with addition
of an inlet duct or inlet-duct simulation
33.4 Installation category C with common inlet duct,
modified with the addition of an outlet common
segment with antiswirl device
33.5 Installation category C, modified with the addition
of an outlet-duct simulation without antiswirl device
Annex A (normative) - Fan pressure and fan installation
category
Annex B (normative) - Fan-powered roof exhaust ventilators
Annex C (informative) - Chamber leakage test procedure
Annex D (informative) - Fan outlet elbow in the case of a
non-horizontal discharge axis
Annex E (informative) - Electrical input power consumed by a
fan installation
Annex F (informative) - Preferred methods of performance
testing
Bibliography