Swema SwemaAir 5 User manual

SwemaAir 5
Operating instructions
vers 1.13 CW20220404
SWEMA AB
Pepparv. 27
SE-123 56 FARSTA
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web page: www.swema.com
WARNING! Before start measuring please read chapter 6, “Set-
tings”. At delivery, k2-factor and automatic density compensa-
tion for atmospheric pressure and temperature is set to ON.
Contents:
1. Introduction......................... 1
2. Technical data....................... 2
3. Start of instrument............... 2
4. Unit..................................... 3
5. Mode................................... 5
6. Settings (Set)....................... 7
7. Notebook.............................. 8

1.
Function keys
ON / OFF
Display light
USB connector
Batteries
Right Key
Enter
Left Key Average
Up Key Max
Down Key down
1. Introduction
SwemaAir 5 is a hot wire anemometer for measuring temperature, air
velocity and air ow. Temperature is measured in °C or °F, air veloc-
ity in m/s or fpm and air ow in l/s, m3/h or CFM. SwemaAir 5 has a
built in barometer that with the measurement of temperature makes
it possible to compensate for correct air density. Air ow is measured
by enter the are into the instrument directly, 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, USB connection and are delivered with
two easily replaceable AA batteries.

2. Technical data
2.
3. Start of instrument
When starting the instrument (ON/OFF-button), the display shows the
battery voltage, rmware version and calibration date. The instrument
enters measuring mode after a couple of seconds. SwemaAir 5 will start
in the same measuring mode it was set to before turned off.
Display light: The display light can be turned On and Off by pressing
the ON/OFF-button (when the 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.
Measurement range
Air velocity: 0,1...12 m/s, 19...2350 fpm
12...30 m/s, 2350...5900 fpm (extra calibration)
Temperature: -20...80 °C, -4...176 °F
Barometer: 600...1200 hPa
Measurement uncertainty at 23 °C
±3% min ±0.04 m/s, min ±8 fpm
Temperature: ±0,3°C, ±0,5°F
Measurement uncertainty at 10...30 °C
±5%, min ±0,05 m/s, min 10 fpm
Barometer: ±3,5 hPa, ±0,1 inHg
Measurement uncertainty at -20...80 °C
Temperature: ±1,0°C, ±1,8°F
(Uncertainty according to GUM (JCGM 100:2008) using a coverage factor of 2, which for
a normal distribution corresponds to a probability of 95%. It is important to correct the
measurement values with the corrections stated in the calibration certicate to obtain the
above uncertainties.
Non condensing, non moist air, <80%RH, non aggressive gases.)
General
Resolution: 0,01m/s, 0,1°C, 1hPa
Calculated
units: l/s, m3/h, cfm
Operating
conditions: Non condensing, non moist air, <80 %RH, non aggressive gases.
Battery: 2 1.5V IEC LR6 AA batteries, standard or rechargeable
Display light
Output: USB to PC, output of online measurement or stored data.
Selectable time constant (0,5, 2, 10 s)
Size: 180x82x36 mm, 195x93x36 mm including probe
Probe size: Ø 8...10 mm probe: 66cm including 1...2 meter Spiral cable.
(Part.No. 768482 66cm probe with 4 m straight cable)
On demand 66 cm probe + 50 cm probe elongation including
1,5...2,5 m spiral cable
Weight: 500g
IP rating: IP50 (protects against dust)

Air velocity measurement
3.
Measurement
When in measuring mode, press Enter to store
a value in the volatile memory. The number of
measuring points stored in the volatile mem-
ory is shown on the display directly under the
measured values, ”2P” (see picture to the right)
means the two measuring points have been
saved. When Enter is pressed an average of
the measuring points is shown for a short while
before the measured values are shown in real
time again.
Average, Max & Min
To check the average, max or min value of the stored measurement
points press Left Key (Average), Up Key (Max) or Down Key (Min),
as long as the button is held down the corresponding value will be
shown on the display.
Save a measurement
After a measuring point has been stored it’s possible to save the
measurement in SwemaAir 5’s Notebook by pressing Save. The dis-
play will show which note number the measurement is saved as (i.e.
n3 = note 3). To erase the measurement from the volatile 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
m
3
/h & °C cfm & °F
hPa & °C inHg & °F
Air Velocity (m/s & Pa)
Press UNIT until SwemaAir 5 shows the units
m/s and °C. The measurements with average,
max and min can be saved.

Air ow meaurements in l/s and m
3
/h with set diameters.
4.
Real = Real density (measured barometric
pressure and temperature)
Std = Standard density (1013 hPa & 20°C)
*= Barometric pressure set manually
See chapter 6, “Settings” for more information on how to change be-
tween Real, Std and *.
Air Flow (l/s, m
3
/h or cfm)
SwemaAir 5 can measure air ow via three different methods. Swe-
maAir 5 measures air ow in:
• Circular ducts with a given diameter
• Rectangular ducts with a given Height x Width
• Ducts with a given transversal area
To measure air velocity, press Unit and air ow measurement in l/s
will be displayed, press Unit once more for air ow in m
3
/h.
The air ow unit displayed
is the last unit SwemaAir 5
was set to. See chapter ”5.
Mode” for more information
on the different air flow
measurements and how to
change settings.
Barometric pressure & Temperature (hPa & °C)
Press Unit until hPa & °C is displayed. The baro-
metric pressure and temperature shown on the
display will be the values SwemaAir 5 uses to
compensate for the density of air (air density
compensation is used on air velocity and air ow
measurements).
When SwemaAir 5 is switched ON, it shows the
measured barometric pressure and Temperature
as standard.
When measurements are performed using air
density compensation, the text “Real” is dis-
played in the top left corner of the display, oth-
erwise the text ”Std” or ”*” is displayed.

5.
5. Mode
When SwemaAir 5 is in measuring mode (any measuring mode) it is
possible to press Mode. In Mode it is possible to select the type of
duct, Settings (Set) or Notebook (saved measurements), press Enter
to conrm or Esc to cancel. Press the Up/Down or Right/left Arrow
keys to change between the duct dimensions, units (Set) or Notebook
(top gure to the right).
Ø = Measurement in circular duct (set
Diameter)
= Measurement in rectangular duct (set
Height x Width)
= Measurement in duct (set Area)
Set = Settings
Notebook = Saved measurements
Ø Air ow measurement in circular duct
Press Mode and select Ø. Press Enter
to edit the diameter of the duct (middle gure
to the right). The diameter is displayed un-
der the measured temperature. There are 13
preselected diameters to choose from, using
the Up and Down keys. These diameters are
between 80 and 1250mm (standard diameters
for circular ducts in the Scandinavian countries).
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
arrow keys, change the value of the digits with
the Up and Down keys.
Press Enter or Esc to conrm and return to
measuring mode.
Press Unit to change between l/s and m3/h.
Air ow measuring mode with
a set diameter.
Editing of a duct diameter.
SwemaAir 5 is by default set to compensate for
the k
2
-factor (reduces the area of a duct).
When the k
2
-factor is turned on the symbol K
2
is
displayed above the measured air ow, see chap-
ter 6, “Settings” for more information regarding
the k
2
-factor and how to turn it On/Off.

6.
Editing of width
Editing of height
Editing of area
Air ow measurement in rectangular duct
Press Mode and select
Press Enter to measure air ow in rectangular
ducts by setting Height x Width. The chosen di-
mensions are displayed directly under the meas-
ured temperature (the display toggles between
showing set height and width).
Air ow measuring mode with
set Height x Width.
To change height or width press Edit. Use the
Arrow keys to set the height and press Enter
to set the width, when nished press Enter again
and SwemaAir 5 returns to measuring mode.
Press Edit to change between Height and Width,
the symbol is shown and the rst digit posi-
tion starts blinking. Change the value of the
digit with the Up and Down keys, and change
between positions with the Right and Left keys.
Press Enter again to edit the Width when 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 ow measurement in duct with set Area
Press Mode and select
Press Enter to measure air ow in a duct with
a given transversal area. The selected area is
displayed under the measured temperature.
Press Edit to change the transversal area, use
the Arrow keys to change it between 0,001...
9,999 m
2
. Press Esc or Enter to return to meas-
uring mode.
Press Unit to change between l/s and m
3
/h.
Air ow measuring mode with
a set area
6. Settings (Set)
For settings; press Mode, go to ”Set” and press Enter. Use Left/Right
keys to see the following settings:
Units (SI or US); Density setting Standard (Std), Real (Real) or Manual
(*); Duration; K2-factor.

7.
Ø ≤ 160 mm » k2 = 0.92
160 < Ø ≤ 400 mm » k2 = 0.96
400 < Ø ≤ 1250 mm » k2 = 0.98
To change a setting press Edit or the Up/Down keys. When changes
are done, press Esc or Enter to conrm and go back to measuring
mode. The following settings are available:
Unit syst
Set units to SI- or US-unit system.
SI units: US Units:
m/s & °C fpm & °F
l/s & °C cfm & °F
m
3
/h & °C cfm & °F
hPa & °C inHg & °F
Density
Set how SwemaAir 5 should calculate and compensate air density
depending on barometric pressure and air temperature (air density is
used on air velocity and air ow measurements). The different settings
to select between are:
Real: For barometric pressure the measurements from the built-in
brometer are used. For temperature the measured tempera
ture is used. ”Real” is the default setting so if SwemaAir 5 is
turned off and on again it will go back to this setting.
Std: Barometric pressure is set to 1013hPa and temperature is set
to 20°C to mimic “standard” conditions.
*: Barometric pressure can be set manually.
Duration
Set how long the averaging of the displayed values should be. Possible
settings are 0.5, 1, 2, & 10 seconds. Higher averaging time will give a
slower but more stable change of the displayed measured values. As
default the averaging time is set to 2 seconds.
k
2
-factor (K
2
)
Turn the k
2
-factor On or Off. If the k
2
-factor is turned ”On” SwemaAir
5 reduces the area of the duct depending on the duct dimensions when
calculating the air ow. Calculation of air ow:
k
2
-factor Off: q = area x air velocity
k
2
-factor On: q = k
2
x area x air velocity
The following k
2
-factor values are used by SwemaAir 5.
Circular ducts, depending on the diameter of the duct:

8.
Rectangular ducts:
7. Notebook
In Notebook it is possible to see and print stored measurements. For
Notebook press Mode, go to ”Notebook” and press Enter.
Height > Width » k2 = 0.94
Height < Width » k2 = 0.98
According to EN 16211.
Display light (Bac. light)
On or Off. The display light can also be turned On and Off by pressing
the ON/OFF-button (with a short press).
Auto Shut: Minutes after last key is pressed until the instrument shuts
itself off. Select setting with arrows.
Square ducts: Height = Width » k2 = 0.96
Use Left/Right Keys to choose which saved
note to display, the note number for the stored
measurement (n1, n2, n3 etc.) is displayed di-
rectly below the stored measurement value.
The saved value displayed in Notebook is the
average of the measurement. To see the maxi-
mum and minimum value of the measurement
use the Up & Down Keys. If Enter is pressed
SwemaAir 5 will display some more information
of the saved measurement. The extra informa-
tion displayed is the barometric pressure and
temperature used. If an air ow measurement
has been saved the k-factor or duct dimension
used will also be shown here.
Stored measurement in note-
book with note number 2
(n2).
Erase the last saved note
or all the stored measure-
ments?
With Erase it is possible to erase all stored measurements. If pressed,
the text ”Erase?” will be displayed, to erase the stored measurements
press All. To abort press Esc.
Instead of erasing all stored measurements it’s
possible to erase the last saved note. In notebook
go to the last saved note, when it is displayed
press Erase. Now two options will be available,
press Note to erase the last saved note or press
All to erase all stored measurements.

9.