Swema SwemaMan 60 User manual

SwemaMan 60 Instructions
vers 1.04 MB20111013
SWEMA AB
Pepparv. 27
SE-123 56 FARSTA
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web site: www.swema.com
Contents:
1. Introduction......................... 1
2. Technical data........................ 1
3. Start of instrument................ 1
4. Calculation of air velocity......... 2
5. Data transfer to PC................. 2
6. Alter settings by PC................ 3

• When starting the instrument (ON/OFF-
button), the display shows the battery vol-
 tageandtheversionnumberoftherm-
ware. After one second it goes to
measuring mode.
1. Introduction
SwemaMan 60 measure differential pressure or air velocity when con-
nected to a pitot static pipe. Differential pressure displays in Pa and air
velocity in m/s or fpm. Two easily changeable (regular or rechargeable)
AA-batteries are used. A 220V adapter (part no. 763.050) can be used,
but doesn’t charge the batteries.
2. Technical data
Differential pressure: -300… 5000Pa
Air velocity: 2.0…91 m/s, 400…17900 fpm at 20°C, 1013hPa
Resulotion: 0,1 Pa
Uncertainty: ±1% read value, lowest ±1,5Pa
95% coverage probability in non condensing, non moist air, <80%RH, non aggressive
gases.
Position dependence: typ. ±0,6Pa
Operating temperature: 0...+50°C
Battery: 2 x 1,5V IEC LR6, AA
Size: 180x36x82mm
Weight: 380g
The user should correct the measured values with the correction on
the calibration protocol to obtain stated accuracy. Recommended
calibration interval is 1 year.
3. Start of instrument
• If the voltage should drop below 1.8 V, the
symbol for low battery is shown.
If the voltage should drop below 1.6 V, the
instrument can’t be turned on.
1.

• Calibrate to zero
By pressing short on UNIT SwemaMan 60
is set to zero. Make sure that you have
zero differential pressure connected and
that you don’t move the instrument during
zeroing.
• Pressure or Air velocity
Press on UNIT for at least 3 seconds to
shift between Pa, m/s or fpm. (If the diffe-
rential pressure is higher than 5050 or
lower than –303 Pa the display blinks
due out of instrument measuring range.)
To measure air velocity (m/s or fpm)
connect a pitot static pipe. Selected unit
will be used next time you turn the instru
ment on.
2.
Air velocity is calculated from the formula:
∆P=dynamicpressure=stagnationpr.-staticpressure(Pa)
ρ=desityofair=
B=barometricpressure(calculatedvalue1013hPa)
t=Airtemperature(calculatedvalue20ºC)
Use the correction table on the backside of the instrument when
measuring at different temperatures and barometric pressures.
4. Calculation of air velocity
5. Data transfer to PC
Connect SwemaMan 60 to a computer by using ”PC-cable to Swe-
maMan” (Part no: 763040). The PC-cable has a RS232 connection so
connect it to a free COM-port on the computer. If the computer hasn’t
a COM-port use a USB-adapter (Part no: 583225).
To transfer data use a terminal software for example ”Hyperterminal”
or ”Teraterm” (Teraterm can be downloaded at www.swema.com).

6. Alter settings by PC
When SwemaMan 60 is connected to a PC it is possible to change
some settings.
Press %M ENTER ENTER to enter settings menu:
[P] Point 0
[S] Shut 0
[T] Time constant 0
[V] Valve 0
Press Por pto change between ”,” (comma) and ”.” (point) as indica-
tingdecimal(comma=0)or(point=1).
ThisisforPCprintoutsofmeasuredvalue.ConrmwithENTER.
Press Sor sto change shut off time in minutes. Select 0 to disable
autoshutoff.ConrmwithENTER
Press Tor tto change display time constant. The display is updated
every0,25seconds(T=0)or0,5seconds(T=1)or2second(T=2)or
8seconds(T=3).ConrmwithENTER
V is only used if Swema has installed a valve (short-circuits the pres-
sure automatically). Normally there are no valve installed and the
value should be 0.
Exit the menu by pressing % ENTER.
3.
Set in the terminal software which COM-port the instrumentet is con-
nected to. Use following settings in the software for the COM-port:
Bits per second: 9600
Data bits: 8
Parity: None
Stop bits: 1
Flow control: Hardware
Press ENTER on the computer-keyboard and you get a calibration
protocol. In the calibration protocol the values between –300 and
500 have one decimal but are printed without a decimal comma.
Temp is the surrounding temperature at calibration with 2 decimals,
without comma.
Press Space and the measurement data is printed on the screen (the
same unit that is shown in the display). The instrument shows only
one value at a time Pa (with 1 decimal), m/s (with 1 decimal) or fpm
(without decimals).