WIKA A2G-25 User manual

DE
EN
Operating instructions
Betriebsanleitung
Air ow meter, model A2G-25
Volumenstrommessgerät, Typ A2G-25
Model A2G-25

2
DE
EN
40202755.03 09/2017 EN/DE
WIKA operating instructions model A2G-25
Operating instructions model A2G-25 Page 3 - 44
Betriebsanleitung Typ A2G-25 Seite 45 - 85
© 01/2011 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!

EN
3
WIKA operating instructions model A2G-25
40202755.03 09/2017 EN/DE
Contents
Contents
Declarations of conformity can be found online at www.wika.com.
1. General information 4
2. Design and function 5
3. Safety 7
4. Transport, packaging and storage 11
5. Commissioning, operation 12
6. Menu navigation 20
7. Maintenance and cleaning 37
8. Dismounting, return and disposal 38
9. Specications 41
10. Accessories 43

EN
4
40202755.03 09/2017 EN/DE
WIKA operating instructions model A2G-25
1. General information
■
The air ow 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 user 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 69.04
1. General information

EN
5
WIKA operating instructions model A2G-25
40202755.03 09/2017 EN/DE
2. Design and function
2.1 Overview
Case
LC display
Cable gland M16
Connecting nozzle (ABS), for hoses with inner diameter 4 or 6 mm
2.2 Description
The model A2G-25 air ow meter is used for measuring air ows of
gaseous media in ventilation and air-conditioning applications. It is
based on the piezoresistive measuring principle.
Electrical analogue output signals for both measurands (DC 0 ... 10 V
or 4 ... 20 mA; adjustable in the instrument via jumpers) or the digital
Modbus®version enable the direct connection to control systems or the
building automation system.
The model A2G-25 air ow meter is based on the principle of eective
pressure measurement. The eective pressure method compares
the static pressure in front of and behind the inlet nozzle of the radial
ventilator used or in front of and behind the channel measuring probe.




2. Design and function

EN
6
40202755.03 09/2017 EN/DE
WIKA operating instructions model A2G-25
Applying the law of conservation of energy, the eective pressure
(dierential pressure of the static pressures) can be assigned to the air
ow as follows:
In this context, k considers the specic nozzle characteristics of
the ventilator (e.g. ebm-papst, ZIEHL-ABEGG, Nicotra-Gebhardt,
Rosenberg, Fläkt-Woods, Comefri).
2.3 Dimensions in mm
2.4 Scope of delivery
■
Air ow meter
■
2 mounting screws
■
2 duct connectors (option)
■
2 x 2 m PVC measuring hose (option)
Cross-check scope of delivery with delivery note.
40405589.02
2. Design and function

EN
7
WIKA operating instructions model A2G-25
40202755.03 09/2017 EN/DE
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.
3.2 Intended use
The air ow meter is used for:
■
Measurement of air ows of radial ventilators
■
Measurement of air ows in ventilation pipes and ducts in conjunction
with the A2G-FM measuring probe
■
Measurement of dierential pressures
3. Safety

EN
8
40202755.03 09/2017 EN/DE
WIKA operating instructions model A2G-25
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.
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.
3. Safety

EN
9
WIKA operating instructions model A2G-25
40202755.03 09/2017 EN/DE
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 equipment.
▶The activities described in these operating instructions
may only be carried out by skilled personnel who have the
qualications described below.
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.
3. Safety

EN
10
40202755.03 09/2017 EN/DE
WIKA operating instructions model A2G-25
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)
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





Model
Measuring range
Output signal
Power supply
Serial number
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
3. Safety