KROHNE OPTISWIRL 2100 Wiring diagram

Vortex flowmeter
Equipment category II 2 G and II 2 D, EPL Gb and Db
in protection type "Flameproof enclosure" Ex d and
in protection type "Increased safety" Ex e and
in protection type "Equipment - dust ignition protection by enclosure" Ex t
OPTISWIRL 2100
OPTISWIRL 2100OPTISWIRL 2100
OPTISWIRL 2100 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 10/2020 - 4008164801 - AD OPTISWIRL2100 Exd R01 en

CONTENTS
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OPTISWIRL 2100
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 Description code............................................................................................................... 5
2.3 Marking............................................................................................................................. 6
2.4 Flammable products ........................................................................................................ 8
2.5 Equipment category / EPL................................................................................................ 9
2.6 Types of protection ......................................................................................................... 10
2.7 Ambient temperature / temperature classes................................................................ 11
2.8 Surface temperature for equipment protection level Db .............................................. 17
2.9 Electrical data................................................................................................................. 18
3 Installation 19
3.1 Mounting ......................................................................................................................... 19
3.2 Special conditions........................................................................................................... 20
4 Electrical connections 21
4.1 General notes ................................................................................................................. 21
4.2 Power supply .................................................................................................................. 23
4.3 Inputs / Outputs .............................................................................................................. 23
4.4 Grounding and equipotential bonding............................................................................ 24
4.5 Flow sensor circuits (remote version only) ................................................................... 26
5 Operation 27
5.1 Start-up........................................................................................................................... 27
5.2 Operation ........................................................................................................................ 27
5.3 Electrostatic charge .......................................................................................................27
6 Service 28
6.1 Maintenance ................................................................................................................... 28
6.2 Dismantling .................................................................................................................... 28
7 Notes 30

SAFETY INSTRUCTIONS 1
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1.1 General notes
This additional instruction applies to explosion-protected versions of vortex flowmeters with
protection type flameproof enclosure "d", increased safety "e" and equipment dust-ignition
protection through enclosure "t", equipment protection level EPL Gb and EPL Db.
It completes the standard manual for the non explosion-protected versions.
The information given in this instruction contains only the data relevant to explosion protection.
The technical details given in the manual 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 EU declaration of conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas
and dust.
The EU declaration of conformity for the equipment category II 2 G and II 2 D is based on the EU
type examination certificate:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed the EU type examination certificate can be downloaded from the manufacturer's
website.
1.3 Approval according to the IECEx scheme
Conformity for use in hazardous areas with gas and dust was tested in accordance with the
"IECEx Certification Scheme for Explosive Atmospheres" according to
IEC 60079-0:2017, IEC 60079-1:2014, IEC 60079-7:2017, IEC 60079-11:2011 and
IEC 60079-31:2013.
The number of the IECEx certificate is:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed, the IECEx certificate can be downloaded from the manufacturer's website.
KIWA 20 ATEX 0042 X
KIWA 20 ATEX 0042 XKIWA 20 ATEX 0042 X
KIWA 20 ATEX 0042 X
IECEx KIWA 20.0013 X
IECEx KIWA 20.0013 XIECEx KIWA 20.0013 X
IECEx KIWA 20.0013 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
personnel trained inpersonnel trained in
personnel trained in
explosion protection
explosion protectionexplosion protection
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
Vortex flowmeters measure and display the flow of flammable and non-flammable gases and
liquids. The signal converter includes a 4...20 mA signal output with optional HART
®
communication. Signal converters have a separate pulse output.
2.2 Description code
The safety description code consists of the following elements*:
* positions which are not needed are omitted (no blank positions)
The remote version consisting of the flow sensor OPTISWIRL 2000 F and the signal converter
VFC 100 F 020 is called the OPTISWIRL 2100 F.
Figure 2-1: Safety description code for the compact version
1 Product designation
2 Type series
3 Compact version
4 Ex - explosion-protected version
Figure 2-2: Safety description code for the signal converter of the remote version
1 Product designation
2 Type series
3 Remote version
4 Sensor electronics VFC 020
5 Ex - explosion-protected version
Figure 2-3: Safety description code for the flow sensor of the remote version
1 Product designation
2 Type series of flow sensor
3 Remote version
VFC 100 F 020 -Ex
OPTISWIRL 2000 F

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2.3 Marking
The marking of the devices in accordance with the description code is shown on the nameplates
below. On both the compact devices and the remote versions, the main plate is located on the
signal converter housing. On the remote versions there is an additional marking on the flow
sensor.
Figure 2-4: Example of a nameplate for the compact version
1 Device version OPTISWIRL 2100 C
2 Production order number
3 Serial number
4 Year of manufacture
5 Marking according to KIWA 20 ATEX 0042 X or IECEx KIWA 20.0013 X
6 Permissible ambient temperature range
7 Electrical connection data
8 Safety instructions, disposal, China RoHs and data matrix code
9 Internet address of the manufacturer

DEVICE DESCRIPTION 2
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Figure 2-5: Example of the nameplates for the remote version
1 Device version VFC 100 F 020 / OPTISWIRL 2000 F
2 Production order number
3 Serial number
4 Year of manufacture
5 Marking according to KIWA 20 ATEX 0042 X or IECEx KIWA 20.0013 X
6 Permissible ambient temperature range
7 Electrical connection data
8 Safety instructions, disposal, China RoHs and data matrix code
9 Internet address of the manufacturer

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2.4 Flammable products
Atmospheric conditions:
Atmospheric conditions:Atmospheric conditions:
Atmospheric conditions:
The standard atmospheric conditions under which it may be assumed that Ex equipment can be
operated are:
•Temperature: -20...+60°C / -4...+140°F
•Pressure: 80...110 kPa (0.8...1.1 bar) / 11.6...15.9 psi
•Air with normal oxygen content, typically 21%v/v
Ex equipment operating outside the standard temperature range must be tested and certified
(e.g. for ambient temperature range -40...+65°C / -40...+149°F).
Ex equipment operating outside the standard atmospheric pressure range and standard oxygen
content is not permitted.
Operating conditions:
Operating conditions:Operating conditions:
Operating conditions:
Vortex flowmeters operate outside the standard atmospheric pressure range, which means that
explosion protection, regardless of the zone assignment, is fundamentally not applicable for the
measuring unit (piping).
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up inside of the piping at the same time the atmospheric conditions are exceeded.
The operator is responsible to ensure that the flowmeter is operated safely in terms of the
temperature and pressure of the products used. In case of operation with flammable products
the measuring units must be included in the periodic pressure tests of the piping.

DEVICE DESCRIPTION 2
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2.5 Equipment category / EPL
Vortex flowmeters are designed in EPL Gb and EPL Db according to IEC 60079-0, IEC 60079-1,
IEC 60079-7 and IEC 60079-31 for use in zone 1 or zone 21. The inside of the measuring unit is
also approved for zone 1.
INFORMATION!
Definition of zone 1:
An area in which an explosive atmosphere, as a result of the mixture of flammable substances in
the form of gas, steam or mist with air, under normal operation may occasionally occur.
Definition of zone 21:
An area in which an explosive atmosphere may occasionally occur in the form of a cloud of
flammable dust in the air under normal operation.

2 DEVICE DESCRIPTION
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2.6 Types of protection
Electronics compartment Ex db (Gb) or Ex tb (Db)
Ex db (Gb) or Ex tb (Db)Ex db (Gb) or Ex tb (Db)
Ex db (Gb) or Ex tb (Db)
Terminal compartment either Ex db or Ex eb (Gb) or Ex tb (Db)
either Ex db or Ex eb (Gb) or Ex tb (Db)either Ex db or Ex eb (Gb) or Ex tb (Db)
either Ex db or Ex eb (Gb) or Ex tb (Db)
Flow sensor Ex ia (Gb or Db)
Ex ia (Gb or Db)Ex ia (Gb or Db)
Ex ia (Gb or Db)
Table 2-1: Used types of protection
ATEX II 2 G
II 2 GII 2 G
II 2 G Ex db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 GbEx db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 Gb
or
Ex db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 GbEx db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
IECEx Ex db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 GbEx db ia IIC T6...T2 Gb
Ex db ia IIC T6...T2 Gb
or
Ex db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 GbEx db eb ia IIC T6...T2 Gb
Ex db eb ia IIC T6...T2 Gb
Table 2-2: Marking for the flameproof version of compact versions
ATEX II 2 G
II 2 GII 2 G
II 2 G Ex db [ia] IIC T6 Gb
Ex db [ia] IIC T6 GbEx db [ia] IIC T6 Gb
Ex db [ia] IIC T6 Gb (signal converter)
or
Ex db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 GbEx db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 Gb
II 2 G
II 2 GII 2 G
II 2 G Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 GbEx ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb (flow sensor)
IECEx Ex db [ia] IIC T6 Gb
Ex db [ia] IIC T6 GbEx db [ia] IIC T6 Gb
Ex db [ia] IIC T6 Gb (signal converter)
or
Ex db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 GbEx db eb [ia] IIC T6 Gb
Ex db eb [ia] IIC T6 Gb
Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 GbEx ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb (flow sensor)
Table 2-3: Marking for the flameproof version of remote versions
ATEX II 2 D
II 2 DII 2 D
II 2 D Ex tb ia IIIC T135
Ex tb ia IIIC T135Ex tb ia IIIC T135
Ex tb ia IIIC T135°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db
IECEx Ex tb ia IIIC T135
Ex tb ia IIIC T135Ex tb ia IIIC T135
Ex tb ia IIIC T135°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db
Table 2-4: Marking for the dustproof version of compact versions
ATEX II 2 D
II 2 DII 2 D
II 2 D Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70°C Db
C DbC Db
C Db (signal converter)
II 2 D
II 2 DII 2 D
II 2 D Ex ia IIIC T135
Ex ia IIIC T135Ex ia IIIC T135
Ex ia IIIC T135°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db (flow sensor)
IECEx Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70Ex tb [ia] IIIC T70
Ex tb [ia] IIIC T70°C Db
C DbC Db
C Db (signal converter)
Ex ia IIIC T135
Ex ia IIIC T135Ex ia IIIC T135
Ex ia IIIC T135°C...T240
C...T240C...T240
C...T240°C Db
C DbC Db
C Db (flow sensor)
Table 2-5: Marking for the dustproof version of remote versions

DEVICE DESCRIPTION 2
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The marking contains the following information:
2.7 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. The temperature class of these devices is rather a function of the
product temperature and ambient temperature that is present and the specific device version.
The classification is outlined in the following tables.
The tables take into account the following parameters:
•Ambient temperature T
amb
•Product temperature T
m
•Nominal size DN
•Heat resistance of the connecting cable
II
IIII
II Explosion protection, group II
2
22
2Equipment category 2
G
GG
GGas explosion protection
D
DD
DDust ignition protection
Ex db
Ex dbEx db
Ex db Protection type "Flameproof enclosure"
Ex eb
Ex ebEx eb
Ex eb Protection type "Increased safety"
Ex tb
Ex tbEx tb
Ex tb Protection type "Equipment - dust ignition protection through enclosure"
Ex ia
Ex iaEx ia
Ex ia Protection type "Intrinsic safety", protection level "ia" (flow sensor, compact device)
Ex [ia]
Ex [ia]Ex [ia]
Ex [ia] Protection type "Intrinsic safety", protection level "ia" (flow sensor circuit, remote
version)
IIC
IICIIC
IIC Gas group, suitable for gas groups IIC, IIB and IIA
IIIC
IIICIIIC
IIIC Dust group, suitable for groups IIIC, IIIB and IIIA
T6...T2
T6...T2T6...T2
T6...T2 Temperature class range, suitable for temperature class T1...T6
T70
T70T70
T70°C
CC
CMaximum surface temperature of the signal converter housing without dust coating
at ambient temperature 65°C/149°F and product temperature 65°C / 149°F
T135
T135T135
T135°C...T240
C...T240C...T240
C...T240°C
CC
CMaximum surface temperature of the flow sensor housing without dust coating at
ambient temperature 65°C/149°F (is determined by the product temperature)
Gb
GbGb
Gb EPL, suitable for zone 1 and zone 2
Db
DbDb
Db EPL, suitable for zone 21 and zone 22
Table 2-6: Description of the marking

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The permitted ambient temperature range is indicated on the nameplate; depending on the
device version it is T
amb
= -40...+65°C / -40...+149°F.
The minimum product temperature is -40°C/-40°F.
When using in zone 21, observe the maximum permissible product and ambient temperatures
for temperature class 2 and the information for use of a heat-resistant connecting cable and
cable entry.
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under
the following conditions:
• The measuring device is installed and operated in accordance with the manufacturer's
installation instructions.
• It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighbouring system components) and thus operated above the permissible
ambient temperature range.
• Insulation must be limited to the piping. Unobstructed ventilation of the signal converter
must be ensured.
max.
max.

DEVICE DESCRIPTION 2
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Max. permissible product and ambient temperatures with signal converter or
connection box mounted above the flow sensor
Figure 2-6: Signal converter above the flow sensor
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 80 65 100 100 135 135 1200 200 1165 1240 200 1165 1
DN40…50 80 65 100 100 135 135 1200 175 1150 1240 175 1150 1
DN65…100 80 65 100 100 1135 1130 1200 150 1130 1235 1150 1130 1
DN150...300 75 65 100 100 135 135 1200 185 1155 1240 185 1155 1
Table 2-7: Temperature class in °C
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 176 149 212 212 275 275 1392 392 1329 1464 392 1329 1
DN40…50 176 149 212 212 275 275 1392 347 1302 1464 347 1302 1
DN65…100 176 149 212 212 1275 1266 1392 302 1266 1455 1302 1266 1
DN150...300 167 149 212 212 275 275 1392 365 1311 1464 365 1311 1
Table 2-8: Temperature class in °F
1Permanent service temperature of connecting cable and cable entry min. 176°F

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Max. permissible product and ambient temperatures with signal converter or
connection box mounted at side or underneath the flow sensor
Figure 2-7: Signal converter at side of the flow sensor
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 85 65 100 100 135 135 200 200 200 1240 240 240 1
DN40…50 80 65 100 100 135 135 200 200 200 1240 240 240 1
DN65…100 85 65 100 100 135 135 1200 200 1200 1240 240 1240 1
DN150...300 80 65 100 100 135 135 200 200 200 1240 240 240 1
Table 2-9: Temperature class in °C
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 185 149 212 212 275 275 392 392 392 1464 464 464 1
DN40…50 176 149 212 212 275 275 392 392 392 1464 464 464 1
DN65…100 185 149 212 212 275 275 1392 392 1392 1464 464 1464 1
DN150...300 176 149 212 212 275 275 392 392 392 1464 464 464 1
Table 2-10: Temperature class in °F
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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Max. permissible product and ambient temperatures for devices with painted flow
sensors / signal converters or connection box mounted above the flow sensor
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 70 65 100 95 1120
1
115
1
120 120
1
115
1
120 120
1
115
1
DN40…50 70 65 100 95 1115
1
105
1
120 115
1
105
1
120 115
1
105
1
DN65…100 70 65 100
1
90 1105
1
95 1120 105
1
95 1120 105
1
95 1
DN150...300 65 65 95 90 1120
1
110
1
120 120
1
110
1
120 120
1
110
1
Table 2-11: Temperature class in °C
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 159 149 212 203
1
248
1
239
1
248 248
1
239
1
248 248
1
239
1
DN40…50 159 149 212 203
1
239
1
221
1
248 239
1
221
1
248 239
1
221
1
DN65…100 158 149 212
1
194
1
221
1
203
1
248 221
1
203
1
248 221
1
203
1
DN150...300 149 149 203 194
1
248
1
230
1
248 248
1
230
1
248 248
1
230
1
Table 2-12: Temperature class in °F
1Permanent service temperature of connecting cable and cable entry min. 176°F

2 DEVICE DESCRIPTION
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Max. permissible product and ambient temperatures for devices with painted flow
sensors / signal converters or connection box mounted at side or underneath the flow
sensor
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 65 65 95 90 120 120 1120 120 120 1120 120 120 1
DN40…50 65 65 85 80 120 1120 1120 120 1120 1120 120 1120 1
DN65…100 65 65 95 90 1120 1120 1120 120 1120 1120 120 1120 1
DN150...300 65 65 85 85 120 120 1120 120 120 1120 120 120 1
Table 2-13: Temperature class in °C
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 149 149 203 194 248 248 1248 248 248 1248 248 248 1
DN40…50 149 149 185 176 248 1248 1248 248 1248 1248 248 1248 1
DN65…100 149 149 203 248 1248 1248 1248 248 1248 1248 248 1248 1
DN150...300 149 149 185 248 248 248 1248 248 248 1248 248 248 1
Table 2-14: Temperature class in °F
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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2.8 Surface temperature for equipment protection level Db
For use in areas with combustible dust it should be noted that the indicated maximum surface
temperature is valid without a dust layer.
For higher product temperatures than 135°C / 275°F the maximum surface temperature is
defined by the product.
The correlation of the temperature classification as a function of the ambient temperature and
the process temperature is shown separately for each type series in the following table.
Device type Surface
temperature
classification
Maximum
permissible
ambient
temperature
in °C
Maximum permissible product temperature in °C
depending on
mounting position of
signal converter or
connection box
flow sensor surface
above side or
underneath
unpainted painted
OPTISWIRL 2100 C-Ex
OPTISWIRL 2000 F T135°C-40...+65 -40...+130 -40...+130 X
T200°Cnot
permitted -40...+200 X
T240°Cnot
permitted -40...+240 X
T135°C-40...+95 -40...+120 X
VFC 100 F - Ex T70°Cnot applicable
Table 2-15: Temperature class and surface temperature in °C
Device type Surface
temperature
classification
Maximum
permissible
ambient
temperature
in °F
Maximum permissible product temperature in °F
depending on
mounting position of
signal converter or
connection box
flow sensor surface
above side or
underneath
unpainted painted
OPTISWIRL 2100 C-Ex
OPTISWIRL 2000 F T275°F-40...+149 -40...+266 -40...+266 X
T392°Fnot
permitted -40...+392 X
T464°Fnot
permitted -40...+464 X
T275°F-40...+203 -40...+248 X
VFC 100 F - Ex T158°Fnot applicable
Table 2-16: Temperature class and surface temperature in °F

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2.9 Electrical data
Signal circuits
Signal circuitsSignal circuits
Signal circuits
The vortex flowmeter signal circuits may only be connected to circuits with the following
maximum values. A safety value of U
m
= 253 V is considered for the power supply units.
Flow sensor circuits
Flow sensor circuitsFlow sensor circuits
Flow sensor circuits
For the compact versions, the intrinsically safe flow sensor circuits are designed as internal
circuits.
For the remote versions, the intrinsically safe flow sensor circuits are led through.
The maximum permissible safety values of the flow sensor circuits are listed below:
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
Remote signal converter, flow sensor circuit (terminal 1 to 7, colour-coded)
U
o
=6.65V;I
o
= 1107 mA; P
o
= 650 mW; C
o
=1.5µF; L
o
=73µH
Remote flow sensor (terminal 1 to 7, colour-coded)
Remote flow sensor (terminal 1 to 7, colour-coded)Remote flow sensor (terminal 1 to 7, colour-coded)
Remote flow sensor (terminal 1 to 7, colour-coded)
U
i
=7V;I
i
= 1107 mA; P
i
= 650 mW; C
i
=0;L
i
=0
Device version Circuit
Terminals
Nominal voltage Nominal current
OPTISWIRL 2100 C Ex
VFC 100 F 020 Ex Current output 4...20 mA C1, C2 12...32 VDC 4...20 mA
Pulse output
M1, M2, M3, M4 8...32 VDC ≤100 mA
Table 2-17: Maximum values for signal circuits.
INFORMATION!
The verification of intrinsic safety for the interconnection between the flow sensor an the signal
converter is not necessary, if the cable length does not exceed 50 m / 164 ft and the supplied
cable is used.

INSTALLATION 3
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3.1 Mounting
Mounting and setup must be carried out according to the applicable installation standards
(e.g. IEC 60079-14) by qualified personnel trained in explosion protection.
The information given in the manual and these instructions must always be observed.
Vortex flowmeters must be installed in such a way that
•no external forces are affecting the indication unit.
•the device is accessible for any necessary visual inspections and can be viewed from all sides.
•the nameplate is clearly visible.
•it can be operated from a location with secure footing.
Aligning the signal converter
The signal converter and the connection box for the remote versions may be aligned on the base
or the wall bracket up to a maximum of ±180 . For this reason, the M4 hexagon socket screw
connecting the base and the signal converter or the connection box must be loosened. Once the
signal converter or the connection box has been turned, it must be screwed back on to the base
again (tightening torque 2 Nm).
• De-energise the signal converter.
• Loosen the hexagon socket screw 1.
• Turn the signal converter or the connection box.
• Screw signal converter or connection box back to the base again.
CAUTION!
The manufacturer is not liable for any damage 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.
Figure 3-1: Aligning the signal converter
1 M4 hexagon socket screw on connection housing

3 INSTALLATION
20
OPTISWIRL 2100
www.krohne.com 10/2020 - 4008164801 - AD OPTISWIRL2100 Exd R01 en
3.2 Special conditions
Flameproof joints in the housing
The housing must be replaced if there is any damage to the joint area. The flameproof thread
gaps and the cylindrical joint between the terminal and the electronics compartments must be
inspected visually after opening.
Electrostatics
For painted versions, risks due to electrostatic charge must be minimized.
For further information refer to
Electrostatic charge on page 27.
Thermal and electrical data
Observe the maximum ambient and product temperatures and electrical data. For futher
information refer to
Ambient temperature / temperature classes on page 11 and refer to Surface
temperature for equipment protection level Db
on page 17 and refer to Electrical data on page
18.
WARNING!
Repairs of the flameproof joints are not allowed.