WIKA A-IAI-1 User manual

Operating instructions
Betriebsanleitung
DE
EN
Attachable indicator model A-IAI-1
Aufsteckanzeige Typ A-IAI-1
Attachable indicator model A-IAI-1

DE
EN
14016825.04 07/2021 EN/DE
Operating instructions model A-IAI-1 Page 3 - 24
Betriebsanleitung Typ A-IAI-1 Seite 25 - 47
WIKA operating instructions attachable indicator model A-IAI-12
© 2012 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!

WIKA operating instructions attachable indicator model A-IAI-1 3
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Content
Content
1. General information 4
2. Design and function 5
2.1 Description 5
2.2 Scope of delivery 5
3. Safety 6
3.1 Explanation of symbols 6
3.2 Intended use 7
3.3 Personnel qualication 7
3.4 Additional safety instructions for instruments per ATEX 8
3.5 Special hazards 9
3.6 Labelling, safety marks 11
3.7 Ex marking 11
4. Transport, packaging and storage 12
4.1 Transport 12
4.2 Packaging and storage 12
5. Commissioning, operation 13
5.1 Electrical connection 13
5.2 Pin assignment 13
5.3 Conguration of the display 14
6. Faults 19
7. Maintenance and cleaning 21
7.1 Maintenance 21
7.2 Cleaning 21
8. Dismounting, return and disposal 21
8.1 Dismounting 21
8.2 Return 22
8.3 Disposal 22
9. Specifications 23
Annex 1: EU declaration of conformity 47

WIKA operating instructions attachable indicator model A-IAI-14
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1. General information
1. General information
■
The model A-IAI-1 attachable indicator 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.
■
Skilled personnel must have carefully read and understood the operating
instructions prior to beginning any work.
■
The manufacturer's liability is void in the case of any damage caused by
using the product contrary to its intended use, non-compliance with these
operating instructions, assignment of insuciently qualied skilled person-
nel or unauthorised modications to the instrument.
■
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
- Relevant data sheet: AC 80.07
- Application consultant: Tel.: [phone]
Fax:[phone]
[email protected]

WIKA operating instructions attachable indicator model A-IAI-1 5
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2. Design and function
2. Design and function
2.1 Description
The model A-IAI-1 attachable indicator is a general-purpose, microproces-
sor-controlled indicator for standard 4 ... 20 mA signals. It does not require
its own power supply, but rather, it is powered directly from the measuring
current.The display of the measured value is made on a 4-digit LC display
with a maximum indication range of -1999 ... 9999 digits.
The model A-IAI-1 attachable indicator is suitable for use in hazardous areas
in accordance with:
II 2G Ex ia IIC/IIB T4 Gb or II 2G Ex ib IIC/IIB T4 Gb
The A-IAI-1 has been designed for the connection of any intrinsically safe
transmitter (with 4 ... 20 mA output).The matching of the indicator range to
the transmitter is made without external aids through the direct input of the
upper and lower measuring range limits and the decimal point position.The
parameters and limit values are entered using three keys. All programmable
parameters are saved in an EEProm and are retained in the event of a loss of
power (for a minimum of 10 years).
The attachable indicator has its own integrated self-diagnostics, which
continuously checks that the key components of the instrument are working
properly. The integrated self-diagnostics, as well as the reporting of an
over-range or under-range condition, ensure high operational safety.
The attachable indicator is delivered tested and fully calibrated. It is therefore
ready for operation, though it must rst be congured for the particular appli-
cation. See chapter 5.3 “Conguration of the display”.
2.2 Scope of delivery
The scope of delivery includes the following components:
■
Attachable indicator
■
2 mounting screws (68 mm and 75 mm)
■
Black prole sealing
■
Operating instructions
Cross-check scope of delivery with delivery note.

WIKA operating instructions attachable indicator model A-IAI-16
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3. Safety
3. Safety
WARNING!
Before installation, commissioning and operation, ensure
that the appropriate instrument has been selected in terms of
measuring range, design and specic measuring conditions.
Non-observance can result in serious injury and/or damage to
property.
Further important safety instructions can be found in the
individual chapters of these operating instructions.
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.
Information
... points out useful tips, recommendations and information for
ecient and trouble-free operation.
DANGER!
...identies hazards caused by electric power. Should the
safety instructions not be observed, there is a risk of serious or
fatal injury.
WARNING!
... indicates a potentially dangerous situation in the hazardous
area that can result in serious injury or death, if not avoided.

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3. Safety
3.2 Intended use
The model A-IAI-1 attachable indicator is suitable for insertion between an
intrinsically safe transmitter and the corresponding output connector (angular
connector).
The instrument has been designed and built solely for the intended use
described here, and may only be used accordingly. The technical specica-
tions 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.
Handle electronic precision measuring instruments with the required care
(protect from humidity, impacts, strong magnetic elds, static electricity and
extreme temperatures, do not insert any objects into the instrument or its
openings). Plugs and sockets must be protected from contamination.
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.
The manufacturer shall not be liable for claims of any type based on opera-
tion contrary to the intended use.
3.3 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.
▶Keep unqualied personnel away from hazardous areas.
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.

WIKA operating instructions attachable indicator model A-IAI-18
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3. Safety
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.
3.4 Additional safety instructions for instruments per ATEX
WARNING!
Non-observance of these instructions and their contents may
result in the loss of explosion protection.
Electrical specications in accordance with the EC-type examination
certicate.
Input circuit:
In Ex ia/ib IIC/IIB intrinsic safety ignition protection.
Only for connection to certied intrinsically safe circuits.
Maximum values:
Ui= 28 V
Ii = 100 mA
Pi= 1,200 mW
Maximum eective internal capacitance Ci < 13 nF
The maximum eective internal inductance is negligibly small.
WARNING!
Special conditions for safe operation
1. No repairs or alterations may be carried out on the instru-
ment by the customer. For maintenance or repair, the instru-
ment must be returned to the manufacturer.
2. Opening the instrument is only permitted outside of the Ex
area.

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3. Safety
WARNING!
Special conditions for all variants:
3. The setting of the internal buttons may only be carried out by
trained personnel.
4. The instruments only full the requirements of intrinsic safety
once an angular connector, which meets the appropriate IP
ingress protection, has been connected.The instruments
must be installed in locations where they are protected from
external damage.
5. The back of the case may not be cleaned with a cloth or
other means which can generate an electrostatic charge.
3.5 Special hazards
WARNING!
Observe the information given in the applicable type exami-
nation certicate and the relevant country-specic regulations
for installation and use in hazardous areas (e.g. IEC 60079-14,
NEC, CEC). Non-observance can result in serious injury and/or
damage to property.
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.
WARNING!
Do not use this instrument in safety or emergency shutdown
devices. Incorrect use of the instrument can result in injury or
material damage.
This instrument has been designed and tested in accordance
with the relevant safety regulations for electronic measuring
instruments.
The trouble-free function and operational safety of the instru-
ment can only be guaranteed if the general safety measures
and the instrument-specic safety instructions given in this
manual are followed.

WIKA operating instructions attachable indicator model A-IAI-110
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3. Safety
WARNING!
■
Observe the operating parameters in accordance with
chapter 9 “Specications”.
■
Prior to opening the instrument, disconnect it from the
supply voltage. Take care that, in tting the instrument and
connections, all components are protected against direct
contact.
■
Design the wiring particularly carefully when connecting
to other devices (e.g. a PC). Under certain circumstanc-
es, internal connections in third-party devices (e.g. GND
connected to the safety earth) can lead to impermissible
voltages.
■
If the connected cable is longer than 30 metres, or leaves
the building, an additional and suitable overvoltage protec-
tion should be provided.
There is a risk of explosion.The safety of the user and the plant may be
endangered if, for example, the instrument:
■
shows visible damage.
■
is no longer working as specied.
■
has been stored under unsuitable conditions for an extended period of time.
If there is any doubt, please return the instrument to the manufacturer for
repair or maintenance.

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3. Safety
3.6 Labelling, safety marks
Product label (example)






Model
Approval-related data
Supply voltage
Order code
Date of manufacture
Serial number
Symbols
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
3.7 Ex marking
ATEX
IECEx
II 2 G Ex ia IIC/IIB T4 Gb
II 2 G Ex ib IIC/IIB T4 Gb
EC-type examination certicate
EPS 21 ATEX 1 036 X

WIKA operating instructions attachable indicator model A-IAI-112
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4. Transport, packaging and storage
4. Transport, packaging and storage
4.1 Transport
Check the attachable indicator for any damage that may have been caused
during transportation. Obvious damage must be reported immediately.
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 ... +50 °C
■
Humidity: 0 ... 80 % r. h. (no condensation)
Avoid exposure to the following factors:
■
Direct sunlight or proximity to hot objects
■
Mechanical vibration, mechanical shock (putting it down hard)
■
Soot, vapour, dust and corrosive gases
■
Hazardous environments, ammable atmospheres
WARNING!
Physical injuries and damage to property and the
environment
Improper storage may lead to physical injuries and damage to
property and the environment. Residual media in the dismount-
ed instrument can result in a risk to persons, the environment
and equipment.
▶Before storing the instrument (following operation), remove
any residual media.
Store the attachable indicator 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 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.

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5. Commissioning, operation
5. Commissioning, operation
5.1 Electrical connection
The connection of the attachable indicator is made via simply plugging it
between an existing transmitter and connector using a specic adapter
design for connectors to DIN 175301-803 A.
No separate supply voltage is needed since the instrument is powered
directly from the measuring current.
The connection and commissioning should only be carried out
by skilled, qualied personnel. An incorrect connection could
damage the indicator.
CAUTION!
Note the maximum permissible input current of 40 mA!
5.2 Pin assignment
The assignment of the angular connector is designed for the most commonly
used conguration for the respective input signal. Since this assignment is
not standardised, it can happen that the assignment for the connected trans-
mitter does not match the assignment of the attachable indicator.
Standard assignment for the model A-IAI-1 angular connector
Contact number Wiring colour Pin Female con-
nector
1Grey 1) Display + Display -
2Red Connected
3Black Connected
4Yellow Connected
1) The stranded wire between pin 1 and the device is blue, the stranded wire between the device and
female contact 1 is grey. Only the grey stranded wire can be changed.

WIKA operating instructions attachable indicator model A-IAI-114
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5. Commissioning, operation
In the angular connector, pin contact 2 is directly connected (1:1) with the
female contact. Between pin contact 1 (+) and female contact 1 (-) is the
A-IAI-1.
Pin contact 3 and 4 are also connected 1:1 with the female connec-
tor.
Pin contacts
Female connector
If the transmitter to be connected does not have the negative power terminal
on contact 2 and the positive power terminal is not on contact 1, then the
assignment of the A-IAI-1 angular connector and the external angular
connector must be matched accordingly. To do this, open the A-IAI-1 angular
connector and exchange the wires from contact 1 and contact 2, so that
these match the connection of the transmitter to be attached.
Now wire both contacts in the angular connector accordingly.
General information on changing the angular connector assignment
Lift out the coupling assembly using a screwdriver in the recess on the side.
Change the assignment in line with the instructions for the relevant input
signal.
Then snap the coupling assembly back into the cover. There are 4 dierent
output orientations to choose from - each at 90° to each other. Attach the
angular connector and screw the connector together using the long screw
delivered with the unit (don't forget the sealings).
5.3 Conguration of the display
To congure the instrument, the cover must rst be carefully removed, in
order that the keys behind it can be reached.To do this, the four screws on
the corners of the case must be removed.

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WARNING!
Do not open the instrument inside an Ex area!
This task should be carried out with suitable ESD protection
measures in mind. Do not damage open components during
this task!
Once the conguration has been completed, correctly place
the seal and t the cover.
The display is optionally available with the membrane keys
on the front of the instrument. The conguration is carried out
using these buttons, so that the case does not have to be
opened.
Operating keys
Key 1: Calling menu options and saving settings
Key 2: Increasing the parameter values
Key 3: Decreasing the parameter values
Key 1 Key 3
Key 2
5. Commissioning, operation

WIKA operating instructions attachable indicator model A-IAI-116
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5. Commissioning, operation
Once the cover of the case has been removed, to congure the instrument
continue as follows:
■
To access the menu, while the actual value is displayed, press key 2 for 2
seconds until “dP” appears in the display.
■
To set the parameter values, press keys 2 and 3.
■
To save the set value, press key 1. The parameter name will then appear in
the display once more. The parameter name will then appear in the display
once more.
■
To switch to the next parameter, press key 1.The name of the parameter
will appear in the display.
If, during input, no key is pressed for 60 seconds, the cong-
uration of the instrument will be interrupted. Previously saved
values will not be lost.
Parameters of the A-IAI-1 attachable indicator
Parameters Values Meaning
Key 1 Keys 2 and 3
dP Position of the decimal point (decimal point)
---- Max. indication range: -1999 … 9999
---.- Max. indication range: -199.9 … 999.9
--.-- Max. indication range: -19.99 … 99.99
-.--- Max. indication range: -1.999 … 9.999
di.Lo Lower indication range limit (display low)
-1999 ... 9999 This value will be displayed when the input
signal = 4 mA
di.Hi Upper indication range limit (display high)
-1999 ... 9999 This value will be displayed when the input
signal = 20 mA

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5. Commissioning, operation
Parameters Values Meaning
Key 1 Keys 2 and 3
Li Measuring range limit (limit)
oFF deactivated:
Exceeding the measuring range limits is
permitted up to the measuring limit (see note).
on.Er active, (error display):
The measuring range is limited exactly to
the input signal. When this exceeds or drops
below it, a corresponding error message is
displayed.
on.rG active, (display measuring range limits):
The measuring range is limited exactly
to the input signal. When this exceeds or
drops below it, the indication range limit is
displayed (e.g. for a humidity of 0 ... 100 % r.
h.: by dropping below the limit 0 is displayed,
and by exceeding it 100 is displayed).
When the measuring limits are exceeded (at
either end), independently of the limit settings, the
corresponding error message appears (“Err.1” or
“Err.2”). The measuring limits are between approx.
3.7 and 20.8 mA.
FiLt Filter (lter)
oFF Filter deactivated
0.1 ... 2.0 Activate the lter in order to prevent the
display from “jumping” with every small
uctuation and to suppress single spikes. The
larger the number, the stronger the ltering.

WIKA operating instructions attachable indicator model A-IAI-118
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Oset and slope correction
The oset and slope correction is used to compensate for sensor tolerances
and for the ne adjustment of deviations of the transmitter or signal transducer.
To set the oset and slope correction, carry out the following:
■
While the actual value is being displayed, press key 3 for 2 seconds, until
“oFFS” appears in the display.
■
To set the parameter values, press keys 2 and 3.
■
To save the set value, press key 1. The parameter name will then appear in
the display once more. The parameter name will then appear in the display
once more.
■
To switch to the next parameter, press key 1.The name of the parameter
will appear in the display.
Parame-
ters
Values Meaning
Key 1 Keys 2 and 3
oFFS Zero oset (oset)
-5.00 … 5.00 The input of the oset is made in digits. The set
oset value is subtracted from the measured
value.
ScAL Slope (scale)
-5.00 … 5.00 The input of the slope correction factor is made
in %.The displayed value is calculated as per
the following equation:
Display = (measured value - Oset - di.Lo) *
(1 + slope correction [% / 100] ) + di.Lo
Example for oset and slope correction
Connection of a pressure transmitter
The instrument display without oset and slope correction is as follows:
at 0 bar = 0.08, at 20 bar = 20.02
From this is calculated:
Zero point: 0.08
Slope: 20.02 – 0.08 = 19.94
Deviation: 0.06 = set slope - actual slope = 20.00 – 19.94
5. Commissioning, operation

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Therefore the following should be set:
Oset = 0.08 = zero point oset
Scale = 0.30
= deviation / actual slope = 0.06 /19.94 = 0.0030 = 0.30 %
Min/Max value memory
The instrument has a Min/Max value memory. In this are stored the lowest
and the highest diplayed values.The Min/Max value memory is a volatile
memory, meaning the stored values are lost when the power is interrupted.
Key Display
To recall Min
value
Press key 3
briey
“Lo” will be displayed briey and then for
approx. 2 s the Min value will be shown
To recall Max
value
Press key 2
briey
“Hi” will be displayed briey and then for
approx. 2 s the Max value will be shown
To delete
the Min/Max
values
Press keys 2
and 3 simulta-
neously for 2 s.
“CLr” will briey be shown in the display, the
Min/Max value will be reset to the current
display value
6. Faults
If the instrument detects any fault conditions, the corresponding error code
will be displayed.
The following error codes are dened:
Error Causes Measures
Err.1
Measuring range
exceeded
Input signal too high
Faulty connection
The error message will reset
itself as soon as the input
signal is once more within the
permissible limits.
Check the transmitter and the
instrument conguration (e.g.
input signal).
5. Commissioning, operation / 6. Faults

WIKA operating instructions attachable indicator model A-IAI-120
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Error Causes Measures
Err.2
Measured value
below permissi-
ble range
Input signal too low or
negative
Current less than 4 mA
Sensor break
The error message will reset
itself as soon as the input
signal is once more within the
permissible limits.
Check the transmitter and the
instrument conguration (e.g.
input signal).
Err.3
Indication range
exceeded
Scaling incorrect The error message will be
reset once the display value is
once more < 9999.
Err.4
Under the indica-
tion range
Scaling incorrect The error message will reset
itself once the display value is
once more within the permis-
sible limits.
Err.7
System error
Permissible operating
temperature too high or
too low.
Instrument defect
Abide by the operating
temperature limits
Replace instrument
Er.11
Value could not
be calculated
Scaling incorrect Check the setting and the
input signal
CAUTION!
Physical injuries and damage to property and the
environment
If faults cannot be eliminated by means of the listed measures,
the attachable indicator must be taken out of operation immedi-
ately.
▶Ensure that pressure or signal is no longer present and
protect against accidental commissioning.
▶Contact the manufacturer.
▶If a return is needed, please follow the instructions given in
chapter 8.2 “Return”.
6. Faults