KROHNE OPTIWAVE 1400 C Wiring diagram

24 GHz Radar (FMCW) Level Transmitter for liquids
in the water and waste water industry
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applicationsSupplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
OPTIWAVE 1400 C
OPTIWAVE 1400 COPTIWAVE 1400 C
OPTIWAVE 1400 C Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 02/2021 - 4007635002 - AD ATEX OPTIWAVE 1400 R02 en

CONTENTS
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OPTIWAVE 1400 C
1 General safety information 3
1.1 Scope of the document..................................................................................................... 3
1.2 Device description ............................................................................................................ 3
1.3 Standards and approvals.................................................................................................. 3
1.4 Device categories ............................................................................................................. 4
1.4.1 Ex ia-approved devices ........................................................................................................... 4
1.4.2 Ex ic devices ............................................................................................................................ 4
1.5 ATEX nameplate ............................................................................................................... 5
2 Installation 6
2.1 Special conditions............................................................................................................. 6
2.2 Precautions....................................................................................................................... 6
2.2.1 General notes.......................................................................................................................... 6
2.2.2 Electrostatic discharge........................................................................................................... 6
2.3 Operating conditions ........................................................................................................ 8
2.3.1 Ambient and process connection temperatures.................................................................... 8
3 Electrical connections 10
3.1 Equipotential bonding system........................................................................................ 10
3.2 How to connect the electrical cables ............................................................................. 10
3.3 Maximum intrinsically safe values for the electrical circuit ......................................... 10
3.4 Supply voltage ................................................................................................................ 10
4 Start-up 11
5 Service 12
5.1 Periodic maintenance..................................................................................................... 12
5.2 Keep the device clean..................................................................................................... 12
5.3 How to remove the device .............................................................................................. 12
5.4 Manufacturer.................................................................................................................. 13
5.5 Returning the device to the manufacturer..................................................................... 13
5.5.1 General information.............................................................................................................. 13
5.5.2 Form (for copying) to accompany a returned device............................................................ 14
6 Notes 15

GENERAL SAFETY INFORMATION 1
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1.1 Scope of the document
These instructions are applicable only to the explosion-protection version of the radar level
transmitter. For all other data, use the Quick Start and Handbook. If you do not have these
documents, please contact the nearest office or download them from the manufacturer's
internet site.
1.2 Device description
The OPTIWAVE 1400 is a 2-wire level transmitter that uses FMCW (Frequency-Modulated
Continuous Wave) radar technology.
The OPTIWAVE 1400 measures level, volume, distance to surface and reflectivity of liquids,
pastes and slurries. It can be installed on tanks, reactors, open channels and open sea.
Measurements are shown in a DTM (device type manager) - a software application for remote
communication.
The level transmitter is approved for use in potentially explosive atmospheres when equipped
with the appropriate options.
1.3 Standards and approvals
You can download the certificates from our internet site.
INFORMATION!
The information in these supplementary instructions only contains the data applicable to
explosion protection. The technical data for the non-Ex version in the Handbook shall be valid in
its current version, provided that it is not rendered invalid or replaced by these supplementary
instructions.
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".
DANGER!
In compliance with European Directive 2014/34/EU (ATEX 114), the ATEX version of the device
described in these Supplementary Instructions conforms to European Standards
EN IEC 60079-0:2018, EN 60079-11:2012 and EN 60079-26:2015. The Ex ia version is certified for
use in hazardous areas by Kiwa ExVision B.V. under the EU-Type Examination Certificate
KIWA 17ATEX0026 X. The Ex ic version is certified for use in hazardous areas by Kiwa ExVision
B.V. under the Type Examination Certificate KIWA 17ATEX0027 X. For more data, refer to the
manufacturer's declaration. You can download the manufacturer's declaration from our internet
site.
WARNING!
Carefully read the ATEX approval certificates. Obey the boundary conditions.

1 GENERAL SAFETY INFORMATION
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1.4 Device categories
1.4.1 Ex ia-approved devices
The Ex ia-approved device has the marking that follows for Gas Groups:
•II 1/2 G Ex ia IIC T6...T5 Ga/Gb
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Gas Groups IIA, IIB and IIC. It is certified for applications requiring
EPL Ga/Gb. The equipment is also applicable for applications that agree with EPL Gb or EPL Gc.
It agrees with temperature classes T6 thru T1 if the temperature limits are obeyed. For more
data, refer to
Ambient and process connection temperatures on page 8.
1.4.2 Ex ic devices
The Ex ic-approved device has the marking that follows for Gas Groups:
•II 3 G Ex ic IIC T6...T5 Gc
The Ex ic-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Gas Groups IIA, IIB and IIC. It is certified for applications requiring
EPL Gc. It agrees with temperature classes T6 thru T1 if the temperature limits are obeyed. For
more data, refer to
Ambient and process connection temperatures on page 8.
INFORMATION!
The equipment must have EPL Ga/Gb if it is installed in the boundary wall between zone 0 and
zone 1 (the antenna is in zone 0 and the signal converter is in zone 1).

GENERAL SAFETY INFORMATION 1
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1.5 ATEX nameplate
Figure 1-1: Nameplate on the signal converter housing
1 ATEX certification number
2 Equipment approval category (explosive atmosphere –gas) and:
–Types of device protection including approved Gas Groups and temperature classes and equipment protection level
3 Intrinsically safe circuit data. Refer to 6for the input voltage range.
4 WARNING: Potential electrostatic charging hazard –see instructions
For more data, refer to
Electrostatic discharge on page 6.
5 Notified body number (production site)
6 Input voltage range and maximum current
7 Type code

2 INSTALLATION
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2.1 Special conditions
This device can be installed on tanks, reactors, open channels and open sea.
2.2 Precautions
2.2.1 General notes
Make sure that:
•you can get access to the device,
•there is sufficient space around the device for inspections,
•you can see the device nameplate, and
•there are no external forces applied on the device.
2.2.2 Electrostatic discharge
Do not install in a location where the electrostatic charge can increase. For example:
•locations near ventilation systems,
•locations where there is a risk of an increase in electrostatic charge caused by compressed
air and dust,
•locations near machines that use friction,
•locations near systems that apply electrons as a spray (e.g. near electrostatic painting
systems), and
•locations near other machines and systems that can have large electrostatic charges.
WARNING!
When you install the device, obey the conditions in the EU-Type Examination certificate or the
Type Examination certificate. These conditions include:
• The special conditions for safe use.
• The Essential Health and Safety Requirements.
You can download the certificates from our internet site.
DANGER!
This installation must agree with EN 60079-14: Explosive atmospheres
– Part 14: Electrical
installations design, selection and erection.
DANGER!
The device contains a PP boundary wall between the process and the signal converter. Do not
use the device if the PP part is not resistant to corrosion by the tank product.
DANGER!
Risk of electrostatic discharge (ESD) from the Drop antenna.

INSTALLATION 2
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DANGER!
Make sure that the device and adjacent objects do not rub together.
Make sure that all personnel and equipment are correctly grounded.
If dirt collects on the device, clean it with a damp cloth.
ESD warning
Figure 2-1: ESD warning (on the device nameplate)
1 Text: Warning! Potential electrostatic hazard –see instructions
Figure 2-2: Risk of ESD
1 Drop antenna

2 INSTALLATION
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2.3 Operating conditions
The allowable ambient temperature and related process connection temperature range for the
device depends on the temperature classes marked on the nameplate.
2.3.1 Ambient and process connection temperatures
The table that follows is applicable in these conditions:
•Device installation must agree with the instructions given in the handbook.
•Make sure that the device temperature does not increase because of other heat sources
(sunlight, adjacent system components etc.). The device must not be operated above the
maximum permitted ambient temperature.
•Do not put insulation around the signal converter. Make sure that the airflow around the
signal converter is sufficient. It is permitted to have insulation on the pipe or stilling well and
the process connection.
WARNING!
The gasket temperature must be in the approved limits. For more data, refer to "Pressure and
temperature ranges" in the Installation chapter of the handbook. The type of gasket and gasket
material must agree with the process.
WARNING!
The reference point for the process temperature is the flange facing (flanges) or the thread stop
(threaded connections) of the device. In the table that follows, this reference point will be
referred to as the "process connection temperature".
WARNING!
An explosive atmosphere is a mixture of air and flammable gases, vapour, mist or dust in
atmospheric conditions. If you do not use the device in these conditions (T
atm
= -20...+60 ° C and
p
atm
= 0.8...1.1 barg), do an analysis of the risk of ignition.
T
atm
= atmospheric temperature and p
atm
= atmospheric pressure.
WARNING!
Make sure that the maximum process connection temperature and maximum ambient
temperature are not more than the values given in the table.

INSTALLATION 2
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Temperature class for
EPLGa/Gb,EPLGborEPLGc
Maximum ambient temperature Maximum process connection
temperature
(max. process temperature)
[°C]
T6 +60 +60
+53 +70
+46 +80
T5 +70 +70
+68 +80
INFORMATION!
The minimum process connection temperature is 0
° C and the minimum ambient temperature is
-20
° C.
If the OPTIWAVE 1400 is not installed above a tank and the device cannot touch the product, then
the data in the table is not applicable. Use this alternative data for the maximum permitted
ambient temperature (Ta):
• For temperature class T6: Ta= +60 ° C
• For temperature class T5: Ta= +70 ° C

3 ELECTRICAL CONNECTIONS
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3.1 Equipotential bonding system
It is not necessary to connect the device to the equipotential bonding system. The device
electronics are isolated with a rating of 500 V
RMS
.
3.2 How to connect the electrical cables
The device is supplied with an electrical cable that is 10 metres long. The cross-sectional area of
each wire is 1 mm².
Obey the instructions that follow:
• Electrical wires must agree with applicable standards (e.g. EN 60079-14).
• Use the electrical connection procedure in the handbook.
• Put the electrical wires in position and safely attach them to prevent damage. The electrical
wires must also be a sufficient distance from hot surfaces.
• Make sure that unused electrical wires are safely connected to the ground potential of the
hazardous area. If this is not possible, make sure that each of the unused electrical wires are
safely isolated (other electrical wires, ground etc.) and rated for a test voltage ≥500 V
RMS
.
• If it is necessary, make sure the electrical wire insulation gives good protection from
corrosion.
• Connect only to separate certified, intrinsically safe circuits. Make sure that the electrical
circuit characteristics are not more than the values that follow.
3.3 Maximum intrinsically safe values for the electrical circuit
3.4 Supply voltage
Output Intrinsically safe values for the electrical circuit
U
i
I
i
P
i
C
i
L
i
[V] [mA] [W] [nF] [µH]
4...20 mA passive –HART ≤30 ≤130 1 ≤11 =12 =6
1This value is not applicable to Ex ic-approved devices
Current output
terminals
Minimum DC voltage
at output terminals
Maximum DC voltage
at output terminals
[V]
Terminals + / - 12 30

START-UP 4
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• Are the wetted components (gasket, flange and antenna) resistant to corrosion by the tank
product?
• Does the information given on the nameplate agree with the application?
• Are you using intrinsically safe barriers within the correct parameters? For more data, refer to
Maximum intrinsically safe values for the electrical circuit on page 10. The electrical circuit
characteristics must not be more than the maximum intrinsically safe values.
WARNING!
Make sure that it is safe to supply electrical power. Do a start-up check:

5 SERVICE
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5.1 Periodic maintenance
In normal operational conditions, no maintenance is necessary. Only the manufacturer can
repair the device and replace components. If it is necessary, maintenance must be done by
approved personnel (the manufacturer or personnel approved by the manufacturer).
5.2 Keep the device clean
Obey these instructions:
•Keep the device clean to prevent dust contamination.
•Do not blow dust with compressed air.
•Clean the device with a damp cloth.
5.3 How to remove the device
The installation and removal of the device or the signal converter is a task for approved
personnel (operator, fitter, electrician etc.). If you must change the signal converter or all of the
device, refer to the procedures in the handbook.
If you must do work in a hazardous location:
•Disconnect the electrical wires.
•Tank installation:
Tank installation:Tank installation:
Tank installation: Before you remove the device from the process connection, make sure that
the tank is not pressurized. A pressurized tank can cause injury to persons when they do
work on it.
•Make sure that all electrical wires are isolated from the ground. This is also applicable to
Protective Earth (PE), Functional Earth (FE) and equipotential bonding conductors.
DANGER!
Do not open the device covers when the device is in an explosive atmosphere and energized.
CAUTION!
Do not replace an Ex i electronic block with a different block that is from a device which does not
have an intrinsically safe barrier.
DANGER!
If dirt collects on the device, clean it with a damp cloth.
Do not use cleaning agents which can cause damage to the boundary wall (the PP Drop antenna)
and the EPDM gaskets. Also make sure that the cleaning agent does not remove the data printed
on the nameplate.
If you use the incorrect cleaning agent (i.e. the device is not resistant to corrosion by your
cleaning agent), do not use the device in a hazardous location. If aid is necessary, speak or write
to the supplier.

SERVICE 5
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5.4 Manufacturer
If the serial number on the device nameplate starts with the letter "F", this device is made by:
KROHNE S.A.S.
2 Allée des Ors –B.P. 98
26103 Romans-sur-Isère CEDEX
France
If the serial number on the device nameplate starts with the letter "S", this device is made by:
KROHNE Measurement Technology (Shanghai) Co., Ltd.
Minshen Road 555 Songjiang Industrial Zone
Shanghai 201612
China
If you need to return your device for inspection or repair, make sure that you send it to the
correct manufacturer and obey the instructions that follow.
5.5 Returning the device to the manufacturer
5.5.1 General information
This device has been carefully manufactured and tested. If installed and operated in accordance
with these operating instructions, it will rarely present any problems.
WARNING!
Should you nevertheless need to return a device for inspection or repair, please pay strict
attention to the following points:
• Due to statutory regulations on environmental protection and safeguarding the health and
safety of the personnel, the manufacturer may only handle, test and repair returned devices
that have been in contact with products without risk to personnel and environment.
• This means that the manufacturer can only service this device if it is accompanied by the
following certificate (see next section) confirming that the device is safe to handle.
WARNING!
If the device has been operated with toxic, caustic, radioactive, flammable or water-endangering
products, you are kindly requested:
• to check and ensure, if necessary by rinsing or neutralising, that all cavities are free from
such dangerous substances,
• to enclose a certificate with the device confirming that it is safe to handle and stating the
product used.

5 SERVICE
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5.5.2 Form (for copying) to accompany a returned device
CAUTION!
To avoid any risk for our service personnel, this form has to be accessible from outside of the
packaging with the returned device.
Company: Address:
Department: Name:
Telephone number:
Fax number:
Email address:
Manufacturer order number or serial number:
The device has been operated with the following medium:
This medium is: radioactive
water-hazardous
toxic
caustic
flammable
We checked that all cavities in the device are free from such substances.
We have flushed out and neutralized all cavities in the device.
We hereby confirm that there is no risk to persons or the environment caused by any residual media contained in this
device when it is returned.
Date: Signature:
Stamp:

NOTES 6
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KROHNE –Products, Solutions and Services
• Process instrumentation for flow, level, temperature, pressure measurement
and process analytics
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• Engineering, commissioning, calibration, maintenance and training services
Head Office KROHNE Messtechnik GmbH
Ludwig-Krohne-Str. 5
47058 Duisburg (Germany)
Tel.: [phone]
Fax: [phone]
[email protected]
© KROHNE 02/2021 - 4007635002 - AD ATEX OPTIWAVE 1400 R02 en - Subject to change without notice.
The current list of all KROHNE contacts and addresses can be found at:
www.krohne.com