WIKA air2guide A2G-20 User manual

DE
EN
Operating instructions
Betriebsanleitung
Mode d‘emploi
Manual de instrucciones
Manuale d‘uso
ES
FR
IT
Air velocity meter, model A2G-20
Luftgeschwindigkeitsmessgerät, Typ A2G-20
Instrument de mesure de la vitesse de l’air, type A2G-20
Instrumento de medición de velocidad del aire, modelo A2G-20
Misuratore della velocità dell’aria, modello A2G-20
Model A2G-20

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WIKA operating instructions model A2G-20
DE
EN
ES
FR
IT
Operating instructions model A2G-20 Page 3 - 22
Betriebsanleitung Typ A2G-20 Seite 23 - 42
Mode d‘emploi type A2G-20 Page 43 - 62
Manual de instrucciones modelo A2G-20 Página 63 - 82
Manuale d‘uso modello A2G-20 Pagina 83 - 102
© 04/2011 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA®is a registered trademark in various countries.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Lire le mode d‘emploi avant de commencer toute opération !
A conserver pour une utilisation ultérieure !
¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!
¡Guardar el manual para una eventual consulta!
Prima di iniziare ad utilizzare lo strumento, leggere il manuale d‘uso!
Conservare per future consultazioni!

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Contents
Contents
1. General information 4
2. Design and function 5
3. Safety 7
4. Transport, packaging and storage 11
5. Commissioning, operation 12
6. Maintenance and cleaning 18
7. Dismounting, return and disposal 19
8. Specications 21

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WIKA operating instructions model A2G-20
1. General information
■
The air velocity meter described in the operating instructions has
been manufactured using state-of-the-art technology. All components
are subject to stringent quality and environmental criteria during
production. Our management systems are certied to ISO 9001 and
ISO 14001.
■
These operating instructions contain important information on
handling the instrument. Working safely requires that all safety
instructions and work instructions are observed.
■
Observe the relevant local accident prevention regulations and
general safety regulations for the instrument's range of use.
■
The operating instructions are part of the product and must be kept
in the immediate vicinity of the instrument and readily accessible to
skilled personnel at any time. Pass the operating instructions on to the
next operator or owner of the instrument.
■
Skilled personnel must have carefully read and understood the
operating instructions prior to beginning any work.
■
The general terms and conditions contained in the sales
documentation shall apply.
■
Subject to technical modications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
www.air2guide.com
- Relevant data sheet: SP 69.06
1. General information

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2. Design and function
2. Design and function
2.1 Overview
Case
LC display (optional)
Cable entry for electrical connection
Mounting ange
Probe sleeve
2.2 Description
The model A2G-20 air velocity meter is used for measuring ow rates
of gaseous media in ventilation and air-conditioning applications. In
addition, the A2G-20 features integrated temperature measurement.
Electrical output signals for both measurands (DC 0 … 10 V or
4 … 20 mA; adjustable at the instrument via jumpers) enable the direct
connection to control systems or the building automation system.










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WIKA operating instructions model A2G-20
2. Design and function
2.3 Dimensions in mm
40340201.01
M16 x 1.5
M16 x 1.5
Mounting ange

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2. Design and function / 3. Safety
2.4 Scope of delivery
■
Air velocity meter
■
Mounting ange
■
Available in three variants
- Without display
- With display
- With display and switching output
Cross-check scope of delivery with delivery note.
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in
serious injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in
light injuries or damage to property or the environment, if not
avoided.
DANGER!
... identies hazards caused by electrical power. Should the
safety instructions not be observed, there is a risk of serious
or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in
burns, caused by hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for
ecient and trouble-free operation.

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3. Safety
3.2 Intended use
This air velocity meter is used for measuring the air velocity and
temperature in air and other non-inammable and non-aggressive gases
of ventilation and air-conditioning systems (e.g. in fresh air/exhaust air
ducts).
This instrument is not permitted to be used in hazardous areas!
The instrument has been designed and built solely for the intended use
described here, and may only be used accordingly.
The technical specications contained in these operating instructions
must be observed. Improper handling or operation of the instrument
outside of its technical specications requires the instrument to be taken
out of service immediately and inspected by an authorised WIKA service
engineer.
The manufacturer shall not be liable for claims of any type based on
operation contrary to the intended use.
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous
situations and injuries.
▶Refrain from unauthorised modications to the instrument.
▶Do not use the instrument within hazardous areas.
▶Do not use the instrument with abrasive or viscous media.
Any use beyond or dierent to the intended use is considered as
improper use.
Do not use this instrument in safety or emergency stop devices.

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3. Safety
3.4 Responsibility of the operator
The instrument is used in the industrial sector.The operator is therefore
responsible for legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the
safety, accident prevention and environmental protection regulations for
the application area must be maintained.
The operator is obliged to maintain the product label in a legible
condition.
To ensure safe working on the instrument, the operating company must
ensure
■
that the operating personnel are regularly instructed in all topics
regarding work safety, rst aid and environmental protection and know
the operating instructions and, in particular, the safety instructions
contained therein.
■
that the instrument is suitable for the particular application in
accordance with its intended use.
■
that personal protective equipment is available.
3.5 Personnelqualication
WARNING!
Riskofinjuryshouldqualicationbeinsucient
Improper handling can result in considerable injury and
damage to property.
▶The activities described in these operating instructions
may only be carried out by skilled personnel who have the
qualications described below.

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3. Safety
Skilled electrical personnel
Skilled electrical personnel are understood to be personnel who,
based on their technical training, know-how and experience as well
as their knowledge of country-specic regulations, current standards
and directives, are capable of carrying out work on electrical systems
and independently recognising and avoiding potential hazards. The
skilled electrical personnel have been specically trained for the work
environment they are working in and know the relevant standards and
regulations.The skilled electrical personnel must comply with current
legal accident prevention regulations.
Operating personnel
The personnel trained by the operator are understood to be personnel
who, based on their education, knowledge and experience, are capable
of carrying out the work described and independently recognising
potential hazards.
Special operating conditions require further appropriate knowledge, e.g.
of aggressive media.
3.6 Labelling, safety marks
Product label (example)
Model Supply voltage
Measuring range Serial number
Output signal
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
Type: A2G-50
Range: -250 ... +250 Pa
Output: 0 ... 10 V / 4 ... 20 mA
Supply: DC 24 V / AC 24 V ±10 % < 1 W
Made in EU E-Nr. 66209848






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4. Transport, packaging and storage
4. Transport, packaging and storage
4.1 Transport
Check the instrument for any damage that may have been caused by
transport.
Obvious damage must be reported immediately.
CAUTION!
Damage through improper transport
With improper transport, a high level of damage to property
can occur.
▶When unloading packed goods upon delivery as well as
during internal transport, proceed carefully and observe
the symbols on the packaging.
▶With internal transport, observe the instructions in chapter
4.2 “Packaging and storage”.
If the instrument is transported from a cold into a warm environment, the
formation of condensation may result in instrument malfunction. Before
putting it back into operation, wait for the instrument temperature and the
room temperature to equalise.
4.2 Packaging and storage
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport
(e.g. change in installation site, sending for repair).
Permissible conditions at the place of storage:
Storage temperature: -20 ... +70 °C
Avoid exposure to the following factors:
■
Direct sunlight or proximity to hot objects
■
Mechanical vibration, mechanical shock (putting it down hard)
■
Soot, vapour, humidity, dust and corrosive gases
■
Hazardous environments, ammable atmospheres

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Store the instrument in its original packaging in a location that fulls the
conditions listed above. If the original packaging is not available, pack
and store the instrument as described below:
1. Wrap the instrument in an antistatic plastic lm.
2. Place the instrument, along with the shock-absorbent material, in the
packaging.
3. If stored for a prolonged period of time (more than 30 days), place a
bag containing a desiccant inside the packaging.
5. Commissioning, operation
WARNING!
Physical injuries and damage to property and the
environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene,
ammable or toxic substances), harmful media (e.g. corrosive,
toxic, carcinogenic, radioactive), and also with refrigeration
plants and compressors, there is a danger of physical injuries
and damage to property and the environment.
Should a failure occur, aggressive media with extremely high
temperature and under high pressure or vacuum may be
present at the instrument.
▶For these media, in addition to all standard regulations,
the appropriate existing codes or regulations must also be
followed.
CAUTION!
Damage to the instrument
When working on open electric circuits (printed circuit boards)
there is a risk of damaging sensitive electronic components
through electrostatic discharge.
▶The correct use of grounded working surfaces and
personal armbands is required.
4. Transport …/ 5. Commissioning, operation

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DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
▶The instrument may only be installed and mounted by
skilled personnel.
▶Operation using a defective power supply unit (e.g. short-
circuit from the mains voltage to the output voltage) can
result in life-threatening voltages at the instrument!
A prerequisite for the commissioning is a proper installation of all
electrical supply, control and measuring lines and of the pressure
connection lines. Before commissioning, check the leak tightness of the
pressure connection lines.
5.1 Mechanical mounting
The air velocity meter is installed in the duct.The cable for the supply
voltage and the cable for the relay connection (optional) must be run
separately when high voltages (not safety extra-low voltage) should be
switched with the relay. Both cables have their own cable entry.
Flange mounting
Fasten the ange
Place the probe sleeve in the ange
Tighten the screw for xing
the probe
5. Commissioning, operation

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WIKA operating instructions model A2G-20
Strain relief downwards
Air ow
direction
Air ow
direction
Instrument orientation
5.2 Electrical mounting
The instruments are designed to operate with safety extra-low voltage
(SELV). When wiring up the instruments, the technical specications
for those instruments should be followed. In the case of a sensor with
transmitter, as a rule, the transmitter should be operated in the middle of
the measuring range, since deviations can occur at the range limits.The
ambient temperature of the transmitter electronics should be kept constant.
The transmitters must be operated at a constant operating voltage
(±0.2 V). Current/voltage spikes from switching the supply voltage on or
o must be prevented by the customer.
Connection diagram
The air velocity meter has two strain reliefs on the underside.The left
strain relief is used for the current input and the signal output (Tout/vout)
and the right one for the relay. For CE conformity, a properly grounded
shielding cable is required.
1. Unscrew the strain relief and run the cable.
2. Connect wires as shown in the illustration below.
3. Tighten down the strain relief.
5. Commissioning, operation

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V
A
V
A
Output 0 … 10 V / 4 … 20 mA (temperature)
Output 0 … 10 V / 4 … 20 mA (air velocity)
Supply voltage
Tout
vout
DC 24 V
GND
NC
COM
NO
Relay switching output
Output signal
5.3 Conguration
The conguration of the air velocity meter includes the setting of the
measuring range and the measuring mode as well as the option with
relay via the conguration elements.
T
v
V mA
sw.p.
hyst.
Tout
vout
24 V
GND
J1
J2
Push button
Congurationelements
5. Commissioning, operation

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WIKA operating instructions model A2G-20
Measuring range
The measuring range is set by installing jumpers on the corresponding
conguration elements J1 and J2.
Measuring range 2 (0 … 2 m/s)
J1 Jumper (J1): Installed
J2 Jumper (J2): Not installed
Measuring range 10 (0 … 10 m/s)
J1 Jumper (J1): Not installed
J2 Jumper (J2): Installed
Measuring range 20 (0 … 20 m/s)
J1 Jumper (J1): Installed
J2 Jumper (J2): Installed
Jumper
installed
Jumper not
installed
Jumper
stored
Measuring mode
The desired output signal for both the temperature (Tout) and air velocity
(vout) outputs is selected by installing jumpers on the corresponding
conguration elements T and v. Both outputs must be congured
separately.
T Temperature output (Tout)⇒T = voltage (V)
v Air velocity output (vout)⇒v = voltage (V)
V mA
V mA
V mA
V mA
T Temperature output (Tout)⇒T = current (mA)
v Air velocity output (vout)⇒v = current (mA)
T Temperature output (Tout)⇒T = voltage (V)
v Air velocity output (vout)⇒v = current (mA)
T Temperature output (Tout)⇒T = current (mA)
v Air velocity output (vout)⇒v = voltage (V)
5. Commissioning, operation

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Option with relay
The relay parameters have to be set before voltage is
connected to the relay connections.This ensures human
safety against electric shock.
1. Setting the switch point
■
Place a jumper on the “switching threshold pins” (sw.p.).
■
Press the “push button” in order to select the switch point for the relay.
⇒ The selected value (m/s) will be shown on the display.
■
Store the jumper used, once the conguration is complete.
2. Setting the hysteresis
■
Place a jumper on the “hysteresis pins” (hyst.).
■
Press the “push button” in order to select the hysteresis for the relay.
⇒ The selected value (m/s) will be shown on the display.
■
Store the jumper used, once the conguration is complete.
Hysteresis
The hysteresis represents a dead band ≤ 20 % around the selected
range, which is anchored at the switch point (sw.p.) and extends around
it by the selected hysteresis range (hyst.).
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
Dead band Switch point
= 1.5 m/s
Hysteresis
= 0.25 m/s
Hysteresis (example)
5. Commissioning, operation

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WIKA operating instructions model A2G-20
In the example shown, the switch point is set to 1.5 m/s and the
hysteresis to 0.25 m/s.When the velocity rises above 1.5 m/s, the relay
opens or closes.When the velocity subsequently drops, the relay only
opens or closes again if the velocity falls below the hysteresis range (to
1.25 m/s).This prevents a fast change-over.
The maximum setting of the hysteresis is based on the selected range:
Range in m/s Maximum hysteresis in m/s
0 - 2 0.4
0 - 10 2
0 - 20 4
6. Maintenance and cleaning
For contact details see chapter 1 “General information” or the
back page of the operating instructions.
6.1 Maintenance
This instrument is maintenance-free and oers long service life provided
it is handled and operated properly.
Repairs must only be carried out by the manufacturer or appropriately
qualied skilled personnel.
6.2 Cleaning
CAUTION!
Physical injuries and damage to property and the
environment
Improper cleaning may lead to physical injuries and damage
to property and the environment. Residual media in the
dismounted instrument can result in a risk to persons, the
environment and equipment.
▶Carry out the cleaning process as described below.
5. Commissioning … / 6. Maintenance and cleaning

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1. Prior to cleaning, switch o and disconnect the instrument from the
mains.
2. Use the requisite protective equipment.
3. Clean the instrument with a moist cloth (soapy water).
Electrical connections must not come into contact with moisture!
CAUTION!
Damage to the instrument
Improper cleaning may lead to damage to the instrument!
▶Do not use any aggressive cleaning agents.
▶Do not use any hard or pointed objects for cleaning.
4. Wash or clean the dismounted instrument, in order to protect persons
and the environment from exposure to residual media.
7. Dismounting, return and disposal
7.1 Dismounting
WARNING!
Physical injuries and damage to property and the
environment through residual media
Upon contact with hazardous media (e.g. oxygen, acetylene,
ammable or toxic substances), harmful media (e.g. corrosive,
toxic, carcinogenic, radioactive), and also with refrigeration
plants and compressors, there is a danger of physical injuries
and damage to property and the environment.
▶Before storage of the dismounted instrument (following
use) wash or clean it, in order to protect persons and the
environment from exposure to residual media.
▶Observe the information in the material safety data sheet
for the corresponding medium.
6. …/ 7. Dismounting, return and disposal

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WARNING!
Risk of burns
During dismounting there is a risk of dangerously hot media
escaping.
▶Let the instrument cool down suciently before
dismounting it!
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
▶The dismounting of the instrument may only be carried out
by skilled personnel.
▶Remove the instrument once the system has been isolated
from power sources.
WARNING!
Physical injury
When dismounting, there is a danger from aggressive media
and high pressures.
▶Observe the information in the material safety data sheet
for the corresponding medium.
▶Dismount the instrument when there is no pressure.
7.2 Return
Strictly observe the following when shipping the instrument:
All instruments delivered to WIKA must be free from any kind of
hazardous substances (acids, bases, solutions, etc.) and must therefore
be cleaned before being returned.
WARNING!
Physical injuries and damage to property and the
environment through residual media
Residual media in the dismounted instrument can result in a
risk to persons, the environment and equipment.
▶With hazardous substances, include the material safety
data sheet for the corresponding medium.
▶Clean the instrument, see chapter 6.2 “Cleaning”.
7. Dismounting, return and disposal