WIKA A2G-25 Operating instructions

WIKA
Brand
WIKA
Model
A2G-25
Type
Operating instructions
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
3WIKA 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
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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
5WIKA operating instructions model A2G-25
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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
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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
7WIKA operating instructions model A2G-25
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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
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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
9WIKA operating instructions model A2G-25
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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
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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
EN
11WIKA operating instructions model A2G-25
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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
4. Transport, packaging and storage
EN
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WIKA operating instructions model A2G-25
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
Personnel: Skilled electrical personnel
Tools: Voltage tester, screwdriver
Only use original parts (see chapter 10 “Accessories”).
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.
4. Transport ... / 5. Commissioning, operation
EN
13WIKA operating instructions model A2G-25
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CAUTION!
Damage to the instrument
When working on open electrical 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.
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!
1. Instrument xing at the desired mounting location
(see chapter 5.1 „Instrument mounting“)
2. Opening the instrument cover, feeding the connection cable through
the cable gland and connecting the wires to the terminal block (see
chapter 5.2 „Electrical mounting“)
5. Commissioning, operation
EN
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WIKA operating instructions model A2G-25
5.1 Instrument mounting
Screw the dierential pressure transmitter onto a suitable vertical
surface and x it horizontally with the mounting screws delivered with the
instrument.
1. Select a mounting location (duct, wall, panel).
2. Remove the case cover and use the screw holes as a template.
3. Mount with suitable screws.
Instrument xing
Instrument orientation
5. Commissioning, operation
EN
15WIKA operating instructions model A2G-25
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1 2 3
Application-related connections
Static pressure
measurement
Filter
monitoring
Ventilator
monitoring
5. Commissioning, operation
EN
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WIKA operating instructions model A2G-25
5.2 Electrical mounting
The instrument is designed to operate with safety extra-low voltage
(SELV). As a rule, operate the air ow meter in the middle of the
measuring range, since deviations can occur at the range limits.
Operate the A2G-25 with a constant operating voltage (±0.2 V) and
ambient temperature. Prevent current/voltage spikes from switching the
power supply on or o.
For CE conformity, a properly grounded protective cable is required.
1. Unscrew the strain relief and feed the cable(s) through.
2. Connect the wires (see “Connection diagram”).
3. Tighten down the strain relief.
Connection diagram
■
Output signal DC 0 ... 10 V
Pressure P Signal
[U]
100 % 10.0 V
50 % 5.0 V
0 % 0.0 V
Time axis t [s]
Pressure P Signal [I]
100 % 20.0 mA
50 % 12.0 mA
0 % 4.0 mA
Time axis t [s]
V
V
A
A
GND
24 V
P
OUT
V
OUT
DC 0 ... 10 V
DC 0 ... 10 V
5. Commissioning, operation
EN
17WIKA operating instructions model A2G-25
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5. Commissioning, operation
■
Output signal 4 ... 20 mA
Pressure P Signal [U]
100 % 10.0 V
50 % 5.0 V
0 % 0.0 V
Time axis t [s]
Pressure P Signal [I]
100 % 20.0 mA
50 % 12.0 mA
0 % 4.0 mA
Time axis t [s]
GND
24 V
P
OUT
V
OUT
4 ... 20 mA
4 ... 20 mA
V
V
A
A
EN
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WIKA operating instructions model A2G-25
5. Commissioning, operation
5.3 Output signal setting
The analogue output signal of the model A2G-25 air ow meter can
be set between 0 ... 10 V and 4 ... 20 mA. The setting can be made via
jumpers on the printed circuit board.
1
2
3
4
4-20 mA
Out
1-10 V
Flow
(Volumenstrom)
Pressure
(Druck)
Installing the jumpers
(Dark grey colour indicates the jumper placement)
1
2
3
4
4-20 mA
Out
1-10 V
Flow
(Volumenstrom)
Pressure
(Druck)
Air ow
Pressure
4 ... 20 mA
Out
1 ... 10 V
Fitting the jumper to the slots, upper left/middle:
Output signal for the air ow: 4 ... 20 mA
Fitting the jumper to the slots, middle/below:
Output signal for the air ow: 0 ... 10 V
Fitting the jumper to the slots, upper right/middle:
Output signal for the dierential pressure: 4 ... 20 mA
Fitting the jumper to the slots, right middle/below:
Output signal for the dierential pressure: 0 ... 10 V
EN
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5.4 Zero point setting
5.4.1 Standard
Connect the voltage supply one hour before making the zero point
setting
1. Remove both hoses from the pressure connections ⊕ and ⊖.
2. Press the zero button until the red LED switches on.
3. Wait until the LED switches o again and install the hoses to the
pressure connections again.
4. In normal operation, we recommend that a zero point calibration is
carried out every 12 months.
5.4.2 Automatic zero point setting (option)
The automatic zero point setting makes the instrument maintenance-
free. The element corrects the zero point from time to time and thus
prevents a zero-point drift in the piezoresistive sensor element.
During the zero point setting the display and output value remains at the
last measured value. The automatic zero point setting takes 3 seconds
and is repeated every 10 minutes.
Reset
(Zurücksetzen)
LED
LED
Reset
5. Commissioning, operation
EN
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WIKA operating instructions model A2G-25
6. Menu navigation
6.1 Standard version
1. Select function mode
Move the “SELECT” button in any direction for at least
3 seconds to activate the setup mode.
▶
“MANUFACTURER” is displayed
“MANUFACTURER” (manufacturer):
- Use of the measuring instrument in an air-handling unit
- Manufacturer and model of the radial ventilator used known
“Common probe” (measuring probe):
- Use together with the model A2G-FM measuring probe
Move the “SELECT” button once, shortly, in order to
activate the selection of the ventilator manufacturer.
▶
Selection “Fläkt Woods” ashes
Use “UP” or “DOWN” to nd the desired ventilator
manufacturer.
▶
The manufacturers are shown in a row
Move the “SELECT” button once, shortly, in order to
accept the displayed manufacturer.
MANUFACTURER
Fläkt Woods
MANUFACTURER
Fläkt Woods
MANUFACTURER
Rosenberg
MANUFACTURER
Rosenberg
6. Menu navigation
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WIKA A2G-25 Operating instructions

WIKA
Brand
WIKA
Model
A2G-25
Type
Operating instructions
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