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