WIKA A2G-25 Bedienungsanleitung

Operating instructions

Betriebsanleitung

Air ow meter, model A2G-25

Volumenstrommessgerät, Typ A2G-25

Model A2G-25

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

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!

WIKA operating instructions model A2G-25

40202755.03 09/2017 EN/DE

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

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

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

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

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

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

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

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

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