KROHNE SMARTPAT ORP 8150 Wiring diagram

Digital ORP sensor
Category
II 1 G
EPL Ga
SMARTPAT ORP 8150
SMARTPAT ORP 8150SMARTPAT ORP 8150
SMARTPAT ORP 8150 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 03/2016 - 4003048503 - MA SMARTSENS ORP 8150 R03 en AD

CONTENTS
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SMARTPAT ORP 8150
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EU conformity ................................................................................................................... 3
1.3 Approval according to the IECEx scheme ........................................................................ 3
1.4 Safety instructions............................................................................................................ 4
2 Device description 5
2.1 Device description ............................................................................................................ 5
2.2 Marking............................................................................................................................. 6
2.3 Flammable products ........................................................................................................ 8
2.4 Device category ................................................................................................................ 8
2.5 Protection type for gas hazardous areas......................................................................... 9
2.6 Temperature classes........................................................................................................9
2.7 Electrical data................................................................................................................. 10
3 Installation 11
3.1 Installation...................................................................................................................... 11
4 Electrical connections 12
4.1 General notes ................................................................................................................. 12
4.2 Power supply .................................................................................................................. 12
4.3 Inputs/outputs ................................................................................................................ 12
4.4 Grounding and equipotential bonding............................................................................ 12
5 Operation 14
5.1 Starting up for the first time .......................................................................................... 14
5.2 Operation ........................................................................................................................ 14
5.3 Electrostatic charge .......................................................................................................14
6 Service 15
6.1 Maintenance ................................................................................................................... 15
6.2 Dismantling .................................................................................................................... 15

SAFETY INSTRUCTIONS 1
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1.1 General notes
This additional Ex instruction applies to explosion-protected versions of the sensors with the
marking II 1 G. It completes the standard documentation for non-explosion protected versions.
The information given in these instructions contains only the data relevant to explosion
protection. The technical details given in the standard documentation for the non-explosion
protected versions remain unchanged unless they will be excluded or replaced by this
instruction.
1.2 EU conformity
The manufacturer declares with the EC declaration of conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas.
Conformity with harmonised standards was checked in accordance with EN 60079-0:2012 and
EN 60079-11:2012.
The EU declaration of conformity is based on the EC type examination certificate of the
Physikalisch Technische Bundesanstalt (PTB):
You can download the EC Type Examination Certificate from the manufacturer's website.
1.3 Approval according to the IECEx scheme
Conformity with IECEx standards was tested in accordance with the IECEx Certification Scheme
for Explosive Atmospheres acc. to IEC 60079-0:2011 and IEC 60079-11:2012. The number of the
IEC certificate is:
You can download the IEC certificate from the manufacturer's website.
PTB 13 ATEX 2018 X
PTB 13 ATEX 2018 XPTB 13 ATEX 2018 X
PTB 13 ATEX 2018 X
IECEx PTB 13.0036 X
IECEx PTB 13.0036 XIECEx PTB 13.0036 X
IECEx PTB 13.0036 X

1 SAFETY INSTRUCTIONS
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1.4 Safety instructions
If these instructions are not followed, there is a risk of explosion.
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
CAUTION!
Operating conditions and place of installation may require compliance with additional standards,
directives or laws. The responsibility for compliance rests solely with the operator or his agent.

DEVICE DESCRIPTION 2
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2.1 Device description
The sensor is designed to measure the oxidation reduction potential (ORP) in liquids. It has a
connection for a 4...20 mA current output with HART
®
communication.
The connection is designed as a plug connector and at the same time supplies the sensor with
power.
The PG 13.5 thread is used as process connection.
1 VP2 connector
2 Nickel-plated brass body
3 PG 13.5 thread
4 Washer
5 O-ring
6 Glass shaft
7 Diaphragm
8 Platinum electrode

2 DEVICE DESCRIPTION
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2.2 Marking
The marking of the sensor type SMARTPAT ORP 8150 is shown on the nameplates below. The
main plate is on the main part of the device and there is an additional marking on the glass.
Figure 2-1: Position of the nameplates on the sensor
1 Nameplate on the sensor connector with ex data
2 Marking on the glass
Figure 2-2: Example nameplate ATEX
1 Manufacturer
2 Device name
3 TAG number, order code, serial number
4 Ex data acc. to PTB 13 ATEX 2018 X
5 Manufacturing date
6 Electronic/electric device waste marking, observe the installation and operating instructions

DEVICE DESCRIPTION 2
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Figure 2-3: Example nameplate IECEx
1 Manufacturer
2 Device name
3 TAG number, order code, serial number
4 Ex data acc. to IECEx PTB 13.0036 X
5 Manufacturing date
6 Electronic/electric device waste marking, observe the installation and operating instructions
Figure 2-4: Marking on the glass shaft
1 Manufacturer
2 Type

2 DEVICE DESCRIPTION
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2.3 Flammable products
Atmospheric conditions
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions. It is defined by the following values:
T
atm
= -20...+60°C / -4...+140°FandP
atm
= 0.8...1.1 bar / 11.6...15.9 psi
Outside of these ranges, for most mixtures no key figures are available for the ignition
behaviour.
Operating conditions
Outside of atmospheric conditions, the explosion protection according to ATEX directive –
regardless of the zone assignment –is not applicable due to the lack of key safety data.
2.4 Device category
The sensor is designed in category II 1 G for use in zone 0.
For more information refer to chapter "Flammable products".
DANGER!
The operator is responsible to ensure that the sensor is operated safely in terms of temperature
and pressure of the products used. In case of operation with flammable media the sensor must
be included in the periodic pressure tests of the plant.
INFORMATION!
Definition of zone 0 according to EN 1127-1:
An area in which an explosive atmosphere, as a result of the mixture of flammable substances in
the form of gas, vapours or mist with air, is continuously or for long periods or frequently
present.

DEVICE DESCRIPTION 2
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2.5 Protection type for gas hazardous areas
In type of protection "Intrinsic Safety" the sensor meets the requirements of EN 60079-11. The
explosion protection is ensured by limitation of the current and voltage so that no ignitable
energy can occur.
The marking of the sensor is:
II 1G Ex ia IIC T6...T1
II 1G Ex ia IIC T6...T1II 1G Ex ia IIC T6...T1
II 1G Ex ia IIC T6...T1
2.6 Temperature classes
The permissible temperature range depending on the temperature class of the sensor is:
Components of the Ex marking and their definition
II
IIII
II Group II explosion protection
1
11
1Equipment category 1
G
GG
GGas explosion protection
Ex ia
Ex iaEx ia
Ex ia Intrinsically safe equipment, protection level ia
IIC
IICIIC
IIC Gas groups IIA, IIB, IIC approved
T6...T1
T6...T1T6...T1
T6...T1 Temperature class range T6...T1
Temperature
class
Permissible ambient or product
temperature in [°C]
Permissible ambient or product
temperature in [°F]
T1 -10...+85°C14...+185°F
T2 -10...+85°C14...+185°F
T3 -10...+85°C14...+185°F
T4 -10...+85°C14...+185°F
T5 -10...+55°C14...+131°F
T6 -10...+55°C14...+131°F
The permissible product temperature range can vary depending on the sensor used. Consult standard
documentation for this information.

2 DEVICE DESCRIPTION
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2.7 Electrical data
Connect the sensor only to intrinsically-safe certified circuits. Observe the following maximum
values for the sensor when connecting:
•U
i
=30V
•I
i
= 120 mA
•P
i
=1.0W
•L
i
=10µH
•C
i
=5nF
The internal electrode circuit is limited to the following maximum values:
•U
o
=7.8V
•I
o
=10mA
•P
o
=20mW
CAUTION!
Capacity and inductance of the connecting cable have to be considered.
INFORMATION!
For information about nominal data and the HART interface consult the standard documentation.

INSTALLATION 3
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3.1 Installation
Mounting of the sensor
• Ensure that you use a gasket suitable for the dimensions of the process connection and the
requirements of the measuring point.
• Align the gasket correctly.
• Carefully lower the sensor into the provided assembly and afterwards into the tank or the pipe.
• Observe all the relevant regulations.
DANGER!
The manufacturer is not liable for any damage or injuries resulting from improper use or use
other than the intended purpose. This applies in particular to hazards due to insufficient
corrosion resistance and suitability of the materials in contact with product.
DANGER!
Installation and setup must be carried out according to the applicable installation standards (e.g.
EN 60079-14) by qualified personnel trained in explosion protection. Observe the information
contained in the manuals and the supplementary instructions. The installation must always
comply with the following requirements:
• No external forces are affecting the sensor.
• The device is accessible for any necessary visual inspections and can be viewed from all
sides.
• The nameplate is clearly visible.
• All gaskets are suitable for the intended use.

4 ELECTRICAL CONNECTIONS
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4.1 General notes
In order to avoid risks, always observe the following points when electrically connecting a
sensor:
•Ensure that all connecting cables conform to the valid installation standards (e.g. IEC 60079-
14) and withstand the maximum operating temperature.
•Securely lay the connecting cables and sufficiently protect them against damage.
•Securely connect all the cores not in use with the ground potential of the explosive area or
carefully insulate them from each other and from ground (test voltage ≥500V
eff
).
4.2 Power supply
The sensor does not require a separate power supply. The required supply for the electronics is
provided via the 4...20 mA current output.
4.3 Inputs/outputs
The connector pin assignment of the sensor is described in the standard documentation. The
signal circuits of the sensor may only be connected to certified intrinsically safe slave units or
circuits. For more information refer to chapter "Electrical data".
4.4 Grounding and equipotential bonding
To dissipate dangerous electrostatic charges the metal housing must be grounded. When
installing in pipes or vessels that are grounded, the electrical connection to earth is carried out
via the PG screw connection made of electrically conductive PEEK.
If installing in pipes or vessels that are not grounded, the shield of the sensor cable must be
connected to the ground potential. The electrical connection to the metal housing and the
ground is made by the sensor cable with the VP connector.
When using junction box SJB 200 W-Ex, the shield of the sensor cable must be connected to the
shield connector provided. This will ensure sufficient electrostatic grounding and at the same
time prevent unacceptably high equalizing currents.
INFORMATION!
When connecting the sensor cable, observe the standard documentation for the sensor, the
chapter "Installation" .
When using junction box SJB 200 W-Ex, the corresponding handbook must also be observed.
WARNING!
The cable shield must not be connected directly on both ends to the ground potential, since
unacceptably high equalizing currents can cause an explosion.

ELECTRICAL CONNECTIONS 4
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INFORMATION!
On junction box SJB 200 W-Ex, the shield connector is connected to the ground potential via a 1
megohms resistor and a capacitor in parallel.
The connections for the intrinsically safe 4...20 mA sensor circuit are galvanically isolated from
both the electrode circuit and the ground and can be considered ground-free (test voltage
500 V
eff
). It is accepted that the electrode circuit can be directly connected to the ground
potential.

5 OPERATION
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5.1 Starting up for the first time
To avoid injury and material damage, only operate the sensor under the following conditions:
•The equipment has to be installed and connected in accordance with the manufacturer's
instructions.
•At the operator's request, a check was conducted prior to start-up to ensure the correct
installation and connection.
•The check prior to start-up was in compliance with the national regulations for checks before
start-up.
5.2 Operation
To avoid injury and material damage, only operate the sensor under the following conditions:
•Temperatures, pressures and electrical limit values are in the manufacturer's specified
range.
•The equipment parts necessary for safety are effective in the long run, never disable them
during operation!
•Include the sensor in the periodic pressure tests of the plant when operating with flammable
products.
5.3 Electrostatic charge
In order to avoid ignition hazards due to electrostatic charge, the sensors may not be
used in areas where:
•processes that generate strong charges,
•mechanical friction and cutting processes,
•spraying of electrons (e.g. in the vicinity of electrostatic painting systems),
•dust carried by compressed air.
INFORMATION!
Observe the information regarding calibration in the standard documentation.
CAUTION!
When using the sensor, and in particular after connecting the connector, ensure that it is
connected properly. Otherwise the degree of IP protection is not guaranteed.

SERVICE 6
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6.1 Maintenance
For systems in hazardous areas, regular checks are required in order to maintain the proper
condition. The manufacturer recommends the following maintenance measures:
•Check the housing, the cable entry and the feed lines for corrosion and/or damage.
•Check the process connection and the piping connections for leakage.
•Check the entire sensor for dust deposits.
6.2 Dismantling
In order to prevent injury or material damage when replacing the sensor, always observe the
following points:
•Before dismantling the electrical connecting lines of the device, ensure that all the cables
leading to the sensor are de-energised themselves and to the reference potential of the
explosive area.
•All the relevant process pipes or containers must be depressurised before dismounting the
sensor.
•If the process pipes or the container contain products that are harmful to the environment or
to health, implement the appropriate safety measures before dismantling the sensor.
•Replace all the seals when reinstalling the device in the process pipe or container.
CAUTION!
Maintenance measures of a safety-relevant nature within the meaning of explosion protection
may only be carried out by the manufacturer, his authorised representative or under the
supervision of authorised inspectors.

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Tel.: [phone]
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