Swema Air 5 User manual

SwemaAir 5
Operating instructions
Rev. 1.02 ES20151027
WARNING! Before start measuring please read chapter 6, Settings.
The instrument is delivered with the k2-factor and automatic density
compensation for atmospheric pressure and temperature set to ON
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Contents:
1. Introduction………………….
2. Technical data......................
3. Start………………................
4. Unit.......................................
5. Mode....................................
6. Settings…….........................
7. Notebook..............................
SWEMA AB
Pepparvägen 27
SE-123 56 FARSTA - SWEDEN
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web page: www.swema.com

1. Introduction
SwemaAir 5 is a hot wire anemometer for measuring temperature, air velocity
and air flow. Temperature is measured in °C or °F, air velocity in m/s or fpm
and air flow in l/s, m3/h or CFM. SwemaAir 5 compensates for correct air
density with the in- built barometer and the measured temperature. The air
flow is measured by entering the area in the instrument, either as diameter or
as Height x Width. SwemaMan 5 can calculate minimum, maximum and
average value. Saved measurements are easily transferred to a PC.
SwemaAir 5 has display light and a USB connection. SwemaAir 5 is delivered
with two easily replaceable AA batteries.
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2. Technical data
3. Start
When starting the instrument (ON/OFF-button), the display shows the
battery voltage, firmware revision and calibration date. After a couple of
seconds the instrument is in measuring mode. SwemaAir 5 will start in the
same measuring mode it was before it was turned off.
Display light: The display light can be turned On and Off by pressing
the ON/OFF-button (when instrument is turned on).
Turn Off: To turn off the instrument press and hold down the ON/
OFF-button for about 2 seconds until the text ”OFF”is shown on the
display.
Air velocity: 0,1... 12 m/s
Temperature: -20... 80°C
Barometer: 600... 1200 hPa
Measurement uncertainty at 23°C:
±0,04 m/s at 0,1... 1,33 m/s
±3% read value at 1,33... 30 m/s
Temperature: ±0,3°C
95% coverage probability in non condensing, non moist air,
<80%RH, non aggressive gases.
Ambient temperature: 0... 50°C
Memory: 300 notes
PC-communication: USB
Battery: 2x1,5V AA (standard or rechargeable)
Size: 195x93X36mm (including probe)
Weight: 500g
IP50 (dust)
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Average, Max & Min
To check on the average, max or min values of the stored measurement
points press Left Key (Avg), Up Key (Max) respective Down Key (Min). The
values are shown on the display as long as the buttons are hold down
Save a measurement
Press Save to store the measured values in the Notebook of SweaAir 5. The
display shows the note number of the saved measurement. (i.e. n3 = note 3).
To erase the measurement from the cache memory press Clear.
4. Unit
Press Unit to alternate between the different units.
SwemaAir 5 can display the following units:
SI Units US Units
m/s & °C fpm & °F
l/s & °C cfm & °F
m3/h & °C cfm & °F
hPa & °C inHg & °F
Air velocity measurement
Measurement
In measuring mode press Enter to store a value
in the cache memory. The number of measuring
points stored in the cache memory is shown on the
display directly below the displayed tempearture, ”2P”
(see picture to the right) and it means two measuring
points has been saved. When Enter is pressed an
average of the measuring points is shown for a short
time before the measured value is shown in real time
again.
Air Velocity (m/s &
°C
)
Press UNIT until SwemaAir 5 shows the units m/s
and °C. The measurements with average, max and
min can be saved.
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Air flow (l/s or m3/h)
SwemaAir 5 measures Air flows in:
·Circular duct with given diameter.
·Rectangular ducts with given Height and Width (H x W).
·Ducts with given transversal area.
To measure air velocity press Unit and Air flow measurement in l/s is
displayed. Press Unit once again to measure Air flow in m3/h
Air flow measurements in l/s and m
3
/h and given
diameters
Barometric pressure & Temperature (hPa & °C)
Refer to chapter 6 Settings (Set) for further information on how to change
between Real, Std and *.
Press
Unit
until hPa & °C is displayed.
The barometric pressure and temperature shown on
the display will be the values SwemaAir 5 calculates
with, to compensate for the density of the air (air density
compensation is used on air velocity and airflow
measurements).
When SwemaAir 5 is switch ON, it shows the measured
barometric pressure and Temperature.
When measurements are performed with air density
compensation, the text “Real”is displayed on the top
and left corner of the display, otherwise the text “Std”or
a star “* ”is displayed.
The air flow unit displayed
is the last unit SwemaAir 5
was set to. Refer to chapter 5
Mode for further information.
On the different air flow
measurements and how to
change the settings.
Real
=
Real density (measured barometric
pressure
and temperature)
Std = Standard density (1013 hPa & 20°C)
* = Barometric pressure set manually
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5. Mode
Press Mode in measuring mode to select the type of duct, Settings (Set) or
Notebook(saved measurements), press Enter to confirm or Esc to cancel.
Press the Up/Down and Right/Left Arrow Keys to change between the duct
dimensions, units (Set) or Notebook (top figure to the right).
Ø : Measurement in circular duct (set Diameter)
: Measurement in rectangular duct (set Height X
Width)
: Measurement in duct (set Transversal Area)
Set: Settings
Notebook: Saved measurements
SwemaAir 5 is by default set to compensate with the
K2-factor (reduces the area of a duct). When the K2-
factor is turned on the symbol K2 is displayed above the
measured airflow, see chapter ”6. Settings (Set)”for
more information about the K2-factor and how to turn it
On/Off.
Air flow measurement in circular duct
Press Mode and select Ø
Press Enter to edit the diameter of the duct (middle
figure to the right). The diameter is displayed under the
measured temperature. There are 13 preselected
diameters to chose between, using the Up and Down
keys. Those diameters are between 80 and 1250mm
(standard diameters for circular ducts in the
Scandinavian countries). Please note! During measuring
It is not possible to change a diameter before the
measurement has been saved or erased.
To edit a diameter press Edit, move between the
positions of the digits with the Right and Left keys,
change the value of the digits with the Up and Down
keys.
Press Enter or Esc to confirm and return to measuring
mode.
Press Unit to change between l/s and m3/h.
Editing
diameter
of a duct
Air flow measuring
with given
diameter
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Air
flow measurement in rectangular duct
Press Mode and select
Press Enter fto measure airflow in rectangular ducts
by setting Height x Width.
The choosen dimensions of Height x Width are
displayed in SwemaAIr 5 below the measured
temperature (the display toggles between the symbols
of Height and Width).
Press Edit to change between Height and Width, the
symbol is shown and the first digit position starts
blinking. Change the value of the digit with Up and
Down keys and change between the positions with
Right and Left keys. Press Enter again to edith the
Width and the symbol is shown. Repeat the
steps above. Press Enter or Esc to return to
measuring mode.
Press
Unit
to change between l/s and m
3
/h.
Air
flow measurement
with a given transversal
area
Press Mode and select
Press Enter to measure air flow in a duct with a given
transversal area. The selected area is displayed under
the measured temperature
Press Edit to change the transversal area, press the
Arrow keys to change it between 0,001... 9,999 m2.
Press Enter or Esc to return to measuring mode.
Press Unit to change between l/s and m3/h.
Air flow measuring
with given
H x W
Editing H (Height)
Editing W (Width)
Air flow measuring
with
given
transversal area
Editing area
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6. SETTING (SEt)
Press Mode, select ”Set”and press Enter. Press Left/Right keys to see
the following settings:
Units (SI or US); Density setting Standard (Std), Real (rEAL) or Manual (*);
Duration; K2faktor
to change a setting press Edit or press Up/Down keys. To confirm the
change press Esc or Enter and SwemaAir 5 returns to measuring mode.
The following settings are available:
Unit systems
SI Units US Units
m/s & °C fpm & °F
l/s & °C cfm & °F
m3/h & °C cfm & °F
hPa & °C inHg & °F
Density:
SwemaAir 5 calculates and compensates for the air density depending on
barometric pressure and air temperature (air density is used on air velocity
and air flow measurements). The different settings to select between are:
Duration:
To select the averaging time of the displayed values, the possible settings are
0.5, 1, 2, & 10 seconds. Higher averaging time will give a slower but stable
change of the displayed measured values. The default averaging time is 2 sec.
K2-factor (K2) ON or OFF:
If ”ON”, SwemaAir 5 reduces the area of the duct depending on the dimension
of the duct when calculating the air flow.
Calculation of the air flow (Q):
K2-factor Off: Q = area x air velocity
K2-factor On: Q = K2x area x air velocity
The following K2-factor values are used by SwemaAir 5:
Circular ducts, depending on the diameter of the duct:
Ø ≤160 mm >> K2= 0.92
160 < Ø ≤400 mm >> K2= 0.96
400 < Ø ≤1250 mm >> K2= 0.98
Real
=
Real density (measured barometric
pressure
and temperature)
Std = Standard density (1013 hPa & 20°C)
* = Barometric pressure set manually
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Rectangular ducts:
Height > Width >> K2= 0.94
Height < Width >> K2= 0.98
Square ducts:
Height = Width >> K2= 0.96
Source: Metoder för mätning av luftflöden in ventilationsinstallationer (T09)/ Methods for
mesuring Air flow in ventilation installation (T09) with correction from NBI:s rapport nordtest
Prosj. 1463-99 rev. 23-05-01.
Display light (Bac. light):
On or Off. The display light can also be turned On and Off by pressing the ON/
OFF-button.
Automatic switch ON/OFF (Auto Shut)
SwemaAir 5 is switched off automatically after a number of minutes it has not
been attended. The possible selections are in minutes 1, 5, 10, 30, 60, other-
wise Off.
7. NOTEBOOK
Press Erase to delete saved measurements. Once Erase has been pressed,
the text ”Erase?”is displayed. There are two options either to press All to
delete the saved measurements or to press Note to delete the last saved
note, otherwise press Esc to cancel.
Press
MODE
and select
Notebook
, press Enter
to
see and print saved measurements. Press Left/Right
Keys to choose the saved note to be displayed.
The note number for the saved measurement (n1,
n2, n3, etc.) is displayed below the displayed
temperature.
The value displayed in Notebook is the average of
the measurement.
To see maximum and minimum values of the
measurement press the Up & Down Keys. Press
Enter to display some more information for the saved
measurements. The extra information displayed is
the barometric pressure and temperature during the
measurement.
The K2-factor or duct dimension for the saved
measurements are shown too.
Saved
measurement in
notebook with note no.
2
(n 2)
Erase the last saved
note or all the saved
measurements?
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