KROHNE OPTIMASS 6400 Wiring diagram

Coriolis mass flowmeter
Safety manual
Safety manualSafety manual
Safety manual
OPTIMASS 6400
OPTIMASS 6400OPTIMASS 6400
OPTIMASS 6400 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en

CONTENTS
2
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
OPTIMASS 6400
1 Introduction 4
1.1 Scope of the document..................................................................................................... 4
1.2 Revision history (Firmware) ............................................................................................. 4
1.3 Device description ............................................................................................................ 4
1.4 Device variants ................................................................................................................. 5
1.4.1 Signal converter...................................................................................................................... 5
1.4.2 Flow sensor............................................................................................................................. 6
1.5 Related documentation .................................................................................................... 7
1.6 Terms and definitions....................................................................................................... 7
2 Specification of the safety function 8
2.1 Preconditions.................................................................................................................... 8
2.2 Definition of the safety function ....................................................................................... 8
2.2.1 Process response time ........................................................................................................... 8
2.2.2 Measurement uncertainties ................................................................................................... 8
3 Installation 9
4 Operation 10
4.1 Condition of use.............................................................................................................. 10
4.2 Configuration of device for usage in safety application................................................. 10
4.2.1 Change of safety mode.......................................................................................................... 10
4.2.2 Switch to safe operation ....................................................................................................... 11
4.2.3 Switch to non-SIL operation ................................................................................................. 11
4.2.4 Safe configuration................................................................................................................. 11
4.2.5 Safe parameter verification .................................................................................................. 13
4.2.6 Confirmation ......................................................................................................................... 14
4.2.7 Unlock of device .................................................................................................................... 15
4.2.8 Current safety state of the device......................................................................................... 15
4.3 Safe current output states ............................................................................................. 15
4.4 Device failures ................................................................................................................ 16
4.4.1 Error handling....................................................................................................................... 16
4.4.2 Error messages .................................................................................................................... 16
5 Service 17
5.1 Periodic maintenance..................................................................................................... 17
5.2 Keep the device clean..................................................................................................... 17
5.3 Spare parts availability...................................................................................................17
5.4 Proof test ........................................................................................................................ 17
5.5 Calibration procedure .................................................................................................... 18
5.6 Troubleshooting.............................................................................................................. 18

CONTENTS
3
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
OPTIMASS 6400
6 Technical data 19
6.1 SIL certificate.................................................................................................................. 19
6.2 Declaration ..................................................................................................................... 20
6.3 Safety-related characteristics ....................................................................................... 21
7 Notes 22

1 INTRODUCTION
4
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
1.1 Scope of the document
This document supplies functional safety data and instructions for an OPTIMASS 6400 SIL device.
1.2 Revision history (Firmware)
1.3 Device description
The OPTIMASS 6400 is a 4-wire Coriolis mass flowmeter measuring mass flow rate, total mass,
density, temperature, volume flow rate, flow velocity, total volume and concentration of liquids
and gases.
The device can be used in safety applications measuring mass flow, volume flow or density of
liquids using the safe current output at terminal C. The safe current output is available as
intrinsically safe and non-intrinsically safe variant according to IEC 60079-11.
INFORMATION!
The data in this supplement only contains the data applicable to the SIL approval. The technical
data for the standard version in the handbook (document [N1]) shall be valid, provided that it is
not rendered invalid or replaced by this supplement.
INFORMATION!
Installation, commissioning and maintenance may only be carried out by properly trained and
authorised personnel.
Release date Electronic revision Changes and compatibility Documentation
2016-07-01 ER 2.0.0_ Initial version AD OPTIMASS 6400 SIL R01 en
2016-12-01 ER 2.0.1_ Compatibility bugfix AD OPTIMASS 6400 SIL R02 en
2017-08-30 ER 2.0.2_ Implementation of new interfaces
1AD OPTIMASS 6400 SIL R02 en
1Not safety relevant change
INFORMATION!
The manufacturer designed and developed the device for safety integrity level (SIL) 2 [and 3 in
homogeneous redundancy architecture] according to IEC 61508 [N3].

INTRODUCTION 1
5
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
1.4 Device variants
1.4.1 Signal converter
The signal converter variant is identified by the CG number on the nameplate:
Power supply option
I/O options
•I/O option 2 and 3 are intrinsic safe I/Os
•Details of the CG number decoding are provided in the handbook [N2].
•The current output at terminal C is the safety relevant output for "Safe Operation".
Figure 1-1: Marking (CG number) of the electronics module and input/output variants
1 ID number: always 3
2 ID number: always 0
3 Power supply option
4 Display: always 1
5 Input/output version (I/O)
6 1st optional module for connection terminal A
7 2nd optional module for connection terminal B
3Power supply
1100...230 VAC
812...24 VDC
5- 7Connection terminals
A+ AA- BB- CC- DD-
2 _ _ -I active P/SNAMUR
C passive I + HART
®
active P / S NAMUR passive
3 _ _ -I passive P/SNAMUR
C passive I + HART
®
passive P / S NAMUR passive
4 _ _ -max. 2 optional modules for term. A + B I + HART
®
active/passive
P / S active/passive

1 INTRODUCTION
6
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
1.4.2 Flow sensor
The flow sensor variant is identified by the V number on the nameplate:
Valid flow sensor codes for SIL device variant: OPTIMASS 6000
-: all variants are valid
Code VE ab c d e fg h j k l m n p q r s t u v w
Position 1-2 3-4 5678-9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Functional
safety
relevant
x x x x x
Code Description Valid flow sensor codes for SIL device variant
VE Prefix to code VE
ab Flow sensor type and size
Flow sensor type and sizeFlow sensor type and size
Flow sensor type and size 71, 72, 73, 74, 75, 76 or 77
cManufacturer specific -
dTube material -
eSurface finish -
fg Connection size - flanges -
hSealing face -
jDesign
DesignDesign
Design K only
kOptions -
lHazardous area approval -
mSanitary and material approvals -
nConfiguration -
pCalibration -
qProcess requirements
Process requirementsProcess requirements
Process requirements 0 or 1
rExtended options 0 only
sCustomer specific
Customer specificCustomer specific
Customer specific 0
tSignal converter type
Signal converter typeSignal converter type
Signal converter type 6 or 7
uDestination -
vSpare -
wSpare -

INTRODUCTION 1
7
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
1.5 Related documentation
1.6 Terms and definitions
[N1] OPTIMASS 6000 Handbook
[N2] MFC 400 Handbook
[N3] IEC 61508-1 to 7:2010 Functional safety of electrical / electronic / programmable electronic safety-
related systems
[N4] Corrosion & Abrasion Guidelines for Coriolis Meter, OPTIMASS Corrosion
[N5] NAMUR Recommendation NE43: Standardization of the Signal Level for the Failure Information of
Digital Transmitters, Feb. 2003
[N6] NAMUR Recommendation NE107: "Requirements to Self-Monitoring and Diagnosis of Field
Devices", October 2006
Term Description
Firmware Software embedded in the device
FIT Failure In Time (1x10
-9
failures per hour)
HFT Hardware Fault Tolerance
I/O Input / output
λ
DD
Rate for dangerous detected failure
λ
DU
Rate for dangerous undetected failure
λ
SD
Rate for safe detected failure
λ
SU
Rate for safe undetected failure
PFD
AVG
Average Probability of Failure on Demand
PFH Probability of a dangerous Failure per Hour
PTC Proof Test Coverage
Safe Current
Output (SCO) Current output at terminal C
SFF Safe Failure Fraction
SIL Safety Integrity Level
SIS Safety Instrumented Systems
Type A system "Non-complex" system (all failure modes are well defined). For more data, refer to
subsection 7.4.3.1.2 of IEC 61508-2.
Type B system "Complex" system (all failure modes are not well defined). For more data, refer to
subsection 7.4.3.1.2 of IEC 61508-2.
T
Proof
Proof Test Interval
1oo1 1 out of 1 channel architecture (single channel architecture performs the safety
function)

2 SPECIFICATION OF THE SAFETY FUNCTION
8
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
2.1 Preconditions
The device must be operated within the process and ambient conditions specified in the
handbooks ([N1], [N2]) of the device.
In addition the device has the following restrictions for safety applications:
•Ensure that entrained gas, cavitation of two-phase flows do not occur in the flowmeter.
•Corrosive products must be excluded according to [N4].
•Erosive products must be excluded.
•Coating inside the measurement tube must be avoided.
In order to execute the safety function the device must be switched to safe operation (for further
information refer to
Switch to safe operation on page 11).
2.2 Definition of the safety function
The safety function of the device is:
Put out a correct mass flow or volume flow or density measurement on safe current output (4 to
20 mA) with a tolerance of ±2% within the process response time of the device (for further
information refer to
Process response time on page 8).
2.2.1 Process response time
The process response time is defined as the T90 for a response to a step change between
process input and safe current output. It depends on the configured time constant of the
damping in the safe current output (C7.1.16):
2.2.2 Measurement uncertainties
The measurement uncertainty of the device in safe operation equals to those in non-SIL
operation as described in the handbooks ([N1], [N2]). It consists of the uncertainty of
measurement function and current output.
Concerning random errors in the device, the safety tolerance must be considered. The safety
tolerance is the tolerable error before setting the safe state of the device. A random fault can
cause an error of up to 2% of the present measurement value or output current before it is
signalled.
Damping [s]
Damping [s]Damping [s]
Damping [s] 0 1 2 5 10 20 50 100
T90 [s]
T90 [s]T90 [s]
T90 [s] 0.90 2.38 4.16 9.58 18.63 36.75 91.12 181.74

INSTALLATION 3
9
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
•The operator must carefully select the correct tube diameter with respect to the expected
flow rates.
•The device must not be exposed to excessive vibration during operation.
•It is the responsibility of the operator to ensure that wetted material is compatible with
process fluid.
•Correctly sized cables for the cable glands must be used and the cable glands and the lid
must be tightened sufficiently. Furthermore the device (lid, cable glands) must not be opened
during safe operation.
•If the safe current output is used in passive configuration an overvoltage at the terminal can
lead to a leakage current in the device's input protection circuit and loss of the safety function
of the device. It is necessary to use a power supply with voltage limitation or voltage
monitoring.
WARNING!
In safety-related applications you must follow the installation instructions given in the
handbooks of the sensor and the converter ([N1], [N2]). The device must be installed by properly
trained and authorised personnel.

4 OPERATION
10
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
4.1 Condition of use
The configuration is protected by a password. For more information on password protection and
device configuration refer to
Unlock of device on page 15.
The current output at terminal C is the safety relevant output for safe operation.
4.2 Configuration of device for usage in safety application
Safety relevant parameters are write-locked and cannot be changed during safe operation.
Parameters which are not safety relevant can be changed in safe operation. If they are supposed
to be write protected, please use the protection in menu C6.3.4.
4.2.1 Change of safety mode
INFORMATION!
Only properly trained and authorised personnel shall change device settings. Keep a report of
changes to the device settings. These reports must include the date, the menu item, the old
setting and the new setting.
Non-SIL
operation
→
Set safety mode
to SIL mode →
Safe
configuration
→
Verify safe
parameters and
confirm
→
Safe operation
←Set safety mode
to non-SIL mode
and confirm
←←Unlock device ←
State Description Safe current output
Non-SIL operation Device can be used in non-SIL
application and all parameters can
be changed.
Measurement signal or failure signal
Safe configuration Device can be configured for safe
operation or device can device can be
switched to non-SIL mode.
Failure signal
Safe operation Device performs the safe
measurement according to its
configuration and all safety relevant
parameters are locked.
Measurement signal or failure signal

OPERATION 4
11
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
4.2.2 Switch to safe operation
In order to switch the device from non-SIL operation to safe operation several steps have to be
performed.
1. Switch the device to safe configuration state by setting safety mode to "SIL Mode" (menu C7.2).
2. Configure the device for safe operation (for further information refer to
Safe configuration on
page 11).
3. Perform safe parameter verification (for further information refer to
Safe parameter verifica-
tion
on page 13).
4.2.3 Switch to non-SIL operation
In order to switch the device from safe operation to non-SIL operation several steps have to be
performed.
1. Switch the device to safe configuration state by unlocking the device (for further information
refer to
Unlock of device on page 15).
2. Change of safety mode to "Non-SIL Mode" (menu C7.2).
3. Perform confirmation (for further information refer to
Confirmation on page 14).
4.2.4 Safe configuration
In safe configuration state some parameters are reset to their factory value and locked because
they have direct impact on the safety function of the device. Following parameters are reset to
factory configuration:
Fixed parameters in safe operation
WARNING!
The device cannot be switched to safe configuration or safe operation if expert mode is enabled
or a lock jumper is present at the local display.
Parameter Value
Safe Current Output Current Span 4-20 mA
Safe Current Output Polarity both
Safe Current Output Trim Values disabled
Safe Current Output Loop Current Mode enabled
Safe Current Output Operation Mode enabled
Density Calibration factory calibration
Operation Mode measurement
Pressure Suppression disabled
Density Mode process
Sensor Low Flow Cutoff factory setting (0.2% of nom. mass flow)
Process Noise Damping 1.0 s
Flow Offset 0kg/s
Flow Correction 0%

4 OPERATION
12
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
Following parameters must be configured for safe operation of the device (menu C7.1):
Changeable safety relevant parameters in safe configuration
Simulation functions for mass flow, volume flow,
density and temperature disabled
Simulation function for safe current output disabled
Parameter Values Description
Safety Mode non-SIL Mode
SIL Mode Safety mode of the device
Device Tag 8 characters Device tag for identification of device via HART
®
Measurement Mass Flow
Volume Flow
Density
Device variable which is assigned to the safe current
output
Lower Range Depends on device
variable Lower range value for safe current output (4 mA)
Upper Range Depends on device
variable Upper range value for safe current output (20 mA). The upper range value must be bigger than the lower
range value
Alarm Code Low = 3.5 mA
High = 21.5 mA Preferred failure current
Low Flow Cutoff
(Threshold) 0%...20% Low flow cutoff threshold at safe current output referred to upper range value
Low Flow Cutoff
(Hysteresis) 0%...20% Low flow cutoff hysteresis at safe current output referred to upper range value. The hysteresis must be
smaller than the threshold.
Damping 0...100 s Damping for safe current output device variable.
This parameter affects the process response time.
Terminal C Type Active
Passive Hardware configuration of safe current output: active or passive (only displayed in non-Ex i version)
Flow Direction Forwards
Backwards Definition of sign of flow value
Zero Calibration -Set by zero calibration procedure
Parameter Value

OPERATION 4
13
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
4.2.5 Safe parameter verification
The safe configuration must be verified either via local display or via HART
®
interface in order to
enter the safe operation state:
•Local display: Select menu item C7.3
•HART
®
: Use the device-specific DD or a DTM (only online mode)
During preparation of the safe parameter verification the following messages could be
displayed:
This process can only be started if the configuration is plausible. During verification of the safe
configuration all safety relevant parameters must be reviewed guided by a wizard.
In the verification wizard all safety relevant parameters are displayed in the following format:
The parameter ID is used for identification of the parameter as described in the following table.
Message Description
Checking Parameters…Configuration is checked for plausibility.
Not allowed Device in safe operation or non-SIL operation. Therefore safe parameter
verification is not allowed.
Config. invalid Implausible configuration.
Press Return to Start Configuration checked successfully and verification can start.
Remove Jumper A lock jumper is set. Please remove it!
Local display HART DD or DTM
WARNING!
Check that all parameters listed in the table for the respective safe measurement are shown in
the verification process.
If the verification process is performed via HART
®
make sure that the correct device is
addressed by checking the device tag. Please make sure that the device tag is unique.

4 OPERATION
14
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
Depending on the selected device variable the following parameters are display in verification:
*: Not displayed in Ex i device variant
x: displayed in verification
4.2.6 Confirmation
In the last step for the safe parameter verification the device generates a random 3-digit
confirmation key which is displayed as depicted below. By entering this confirmation:
•the safe configuration (only for safe operation) is confirmed
•the desired safety mode (non-SIL or SIL) is confirmed
After confirmation of SIL mode, all safety relevant parameters are write-locked and the device
switches to safe operation state.
ID Parameter Mass flow Volume flow Density
1Measurement x x x
2Lower Range x x x
3Upper Range x x x
4Alarm Code x x x
5Low Flow Cutoff (Threshold) x x
6Low Flow Cutoff (Hysteresis) x x
7 Damping x x x
8Terminal C Type* x x x
9Flow Direction x x
10 Zero Calibration x x
Local display HART DD or DTM
Message Description
Timeout occured The safe parameter verification must be completed within 1 hour. Please restart
safe parameter verification.
Wrong Key The entered confirmation key was incorrect. Please restart safe parameter
verification.
Successful Device is in safe operation or non-SIL operation.
INFORMATION!
All safety relevant parameters are locked during safe operation. If not safety relevant
parameters shall be locked please set the operator password ([N2]).

OPERATION 4
15
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
4.2.7 Unlock of device
Safety relevant parameters cannot be changed in safe operation. The device must be set to the
safety state safe configuration in order to change safety relevant parameters. Therefore unlock
the device (C7.4) by entering the configurable unlock key (C7.5). Within this state the current
output is set to the failure signal.
Default Unlock Key:
Default Unlock Key:Default Unlock Key:
Default Unlock Key: 9999
4.2.8 Current safety state of the device
Current safety state of the device is displayed at local display with an icon in the upper right
corner:
Furthermore check menu entry B1.6 for present safety state.
4.3 Safe current output states
Icon State
Safe configuration
Safe operation
Current output state Description
Measurement (4-20 mA) Output of safe measurement.
Extended Range
(3.8…20.5 mA) Output according to NE43 [N5]. If the limits of the extended range are reached, the device sets the signal "Out of Specification" (current output) however it does not enter the safe
state.
Safe State (≥21 mA or
≤3.6 mA) For any type of safe or dangerous detected failure, the device sets the safe current output to the preferred failure current (failure signal). Although this value can also be set to high
failure current (≥21 mA) some hardware failures will always cause the device to set a low
failure current (≤3.6 mA). Thus, the output signal for the safe state is less than 3.6 mA.
WARNING!
If the device is used in a safety loop both the high and low failure current must be monitored.

4 OPERATION
16
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
4.4 Device failures
4.4.1 Error handling
4.4.2 Error messages
Besides the standard error conditions in safe operation, the device has additional conditions:
Error condition Description
Safety Rel. Failures Only safety relevant failures result in safe state.
Failures Safety relevant failures and not safety relevant device faults classified as NE 107 [N6]
failure result in safe state.
Out Of Specification Safety relevant failures and not safety relevant device faults classified as NE 107 [N6]
failure or out of specification result in safe state.
INFORMATION!
If 2 phase flow detection is configured according to the handbook [N2], it can be either used to
• set the safe state at the safe current output by setting "Proc: 2 Phase Flow" (C7.2.11) to
"Failure" or
• signal it via any not safety relevant I/O by setting "Proc: 2 Phase Flow" (C7.2.11) to "Out of
Specification"
Error message Cause Action
Electr.Temp.Out of Spec Electronics temperature exceeds limits. Protect electronics from heat by process or
direct sunlight.
Flow Out of Range Flow above max. flow rate for flow sensor. Check process conditions.
IO Connection Load for safe current output too high (e.g.
open circuit) or hardware error in safe
current output.
Check connection at safe current output,
reduce load and perform reset errors (A2.1).
Int. Comm. Error IO C Internal communication error in the device. Perform power reset. If the status returns,
contact the manufacturer.
IO C Failure Hardware failure in safe current output. Perform power reset, reset errors (A2.1).
If the status returns, contact the
manufacturer.
Process Input Failure Sensor electronics failure. Perform power reset, reset errors (A2.1).
If the status returns, contact the
manufacturer.
Safe Config. Invalid Safe configuration are invalid. Reset to factory configuration.
Safety Rel. Failure Safety relevant failure occurred described
by additional error messages. Check additional error messages.
Sensor Error Flow sensor is defect. Replace flow sensor.
Temp. Or Strain Res. Def. Hardware failure in temperature or strain
measurement. Check cabling in case of remote device or replace flow sensor.

SERVICE 5
17
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
5.1 Periodic maintenance
You must follow the maintenance instructions given in the handbook [N1].
5.2 Keep the device clean
For further information refer to "Service" in the handbook ([N1]).
5.3 Spare parts availability
The manufacturer adheres to the basic principle that functionally adequate spare parts for each
device or each important accessory part will be kept available for a period of 3 years after
delivery of the last production run for the device.
This regulation only applies to spare parts which are subject to wear and tear under normal
operating conditions.
5.4 Proof test
Keep a report of each proof test. These reports must include the date, the tests results
(performance of the safety function or faults found), a list of approved personnel who did the test
and the report revision number. These reports must be put into storage and made easily
available. If any test step fails because specified tolerances are exceeded, the safety function of
the device is not fulfilled anymore. Please return the device to the manufacturer [N2].
Test procedure
Unlock device and set it to non-SIL operation.
Set the device to safe operation.
WARNING!
SIS engineers must calculate the interval of proof tests based on the required PFD
AVG
.
CAUTION!
Proof tests done by the customer must cover at least the tests given in this section.
Step Measure
1Perform power cycle (disconnect the device briefly from the power supply).
2Perform a 4-point current output check for safe current output using the built-in simulation function
(B3.9), by setting the simulated current to 3.6 mA, 4.0 mA, 20.0 mA and 21.5 mA.
Measure the current at the current output with a traceably-calibrated ammeter or logic subsystem.
The ammeter must have a DC current measurement uncertainty ±5µA or better.
3Compare the density reading with the expected density of your product. The measurement uncertainty
must not exceed the maximum error specified in the handbook.
4Check mass flow measurement accuracy with a calibration rig with at least at 2 measuring points or
return the device to the manufacturer for recalibration. The measurement uncertainty must not exceed
the maximum error specified in the handbook.

5 SERVICE
18
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
Proof Test Coverage
Proof Test Coverage for steps 1-2 (partial proof test): 77%
Proof Test Coverage for steps 1-3 (partial proof test): 82%
Proof Test Coverage for steps 1-4 (full proof test): 97%
KROHNE OPTICHECK can be used to perform the tests 1-3 in a simple way.
5.5 Calibration procedure
It is recommended to perform a zero calibration during every proof test or safe configuration.
The conditions for zero calibration in the handbook [N2] must be taken into account.
In safe operation density factory calibration is used.
5.6 Troubleshooting
Failures that are critical to functional safety should be reported to technical support of the
manufacturer. If you find a problem, please contact your local representative. If the device must
be returned to the manufacturer, refer to "Returning the device to the manufacturer" in [N2].
WARNING!
Perform an optical inspection of the sealings, containment, housing and electrical wiring within
every proof test.
INFORMATION!
• Modifications to SIL capable devices by the user are not permitted.
• Only authorised personnel from manufacturer shall repair the device.

TECHNICAL DATA 6
19
OPTIMASS 6400
www.krohne.com11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
6.1 SIL certificate

6 TECHNICAL DATA
20
OPTIMASS 6400
www.krohne.com 11/2017 - 4004960802 - AD OPTIMASS 6400 SIL R02 en
6.2 Declaration