Knick Stratos Multi E401N User manual

I
Favorites MenuMenu
pH
II
7.00 µS
cm
25.3
0.154
25.3
°C °C
User Manual Stratos Multi E401N
Industrial Transmitters
www.knick.de
Read before installation.
Keep for future use.

Stratos Multi E401N
ii
Supplemental Directives
These supplemental directives explain how safety information is laid out in this document and what
content it covers.
Safety Chapter
This document's safety chapter is designed to give the reader a basic understanding of safety.
It illustrates general hazards and gives strategies on how to avoid them.
Safety Guide
The external safety guide is designed to give the reader a basic understanding of safety.
It illustrates general hazards and gives strategies on how to avoid them.
Warnings
Stratos Multi E401 was subjected to a risk assessment. Nevertheless, not all risks can be sufficiently
reduced. This document uses the following warnings to indicate hazardous situations:
Symbol Category Meaning Remark
WARNING Designates a situation that can lead to death or serious
(irreversible) injury
The warnings contain
information on how to
avoid the hazard.
CAUTION Designates a situation that can lead to slight or moderate
(reversible) injury
Without NOTICE Designates a situation that can lead to property or environ-
mental damage
Additional Safety Information
• Stratos Multi E401 safety guide
Symbols Used in this Document
Symbol Meaning
Cross-reference to content within this document
Interim or final results in instructions for action
Item number in figure
Item number in text

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iii
Table of Contents
1 Safety............................................................................................................................................. 8
1.1 Intended Use.......................................................................................................................................................... 8
1.2 Symbols and Markings on the Product ........................................................................................................ 8
1.3 Personnel Requirements.................................................................................................................................... 8
1.4 Safety Training....................................................................................................................................................... 8
1.5 Installation and Commissioning..................................................................................................................... 9
1.6 Maintenance and Repair.................................................................................................................................... 10
1.7 Residual Risks......................................................................................................................................................... 10
2 Product.......................................................................................................................................... 11
2.1 Design and Function........................................................................................................................................... 11
2.2 Product Range and Options ............................................................................................................................. 12
2.3 System Overview.................................................................................................................................................. 14
2.3.1 Typical Applications............................................................................................................................... 15
2.4 Package Contents and Product Identification ........................................................................................... 17
2.4.1 Nameplate ................................................................................................................................................. 18
2.5 Symbols and Markings on the Display ......................................................................................................... 18
3 Commissioning............................................................................................................................. 20
3.1 Assembly ................................................................................................................................................................. 20
3.1.1 Dimension Drawings ............................................................................................................................. 21
3.1.2 Housing Mounting Options ................................................................................................................ 22
3.1.3 Pipe Mounting ZU0274......................................................................................................................... 23
3.1.4 Protective Hood for Wall and Pipe Mounting ZU0737 .............................................................. 24
3.1.5 Panel-Mount Kit ZU0738 ...................................................................................................................... 25
3.1.6 Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts.................................... 26
3.2 Electrical Installation ........................................................................................................................................... 27
3.2.1 Relay Contacts: Protective Wiring ..................................................................................................... 27
3.2.2 Installing Active and Passive Current Outputs ............................................................................. 29
3.2.3 Terminal Assignments........................................................................................................................... 30
3.3 Sensor Connection............................................................................................................................................... 31
3.3.1 Connecting a Memosens Sensor/Optical Oxygen Sensor (LDO)........................................... 31
3.3.2 Connecting an Analog Sensor/Second Memosens Channel .................................................. 32
3.3.3 Cable Preparation for SE655/SE656.................................................................................................. 33
3.4 Terminal Assignments of Measuring Modules........................................................................................... 34
3.5 Final Check During Commissioning .............................................................................................................. 35
4 Operation and Use........................................................................................................................ 36
4.1 Changing the User Interface Language ....................................................................................................... 36
4.2 Keypad and Display............................................................................................................................................. 36
4.3 Menu Structure Overview ................................................................................................................................. 39
4.4 Access Control ....................................................................................................................................................... 39
4.5 Operating States................................................................................................................................................... 40
4.6 Measurement Display......................................................................................................................................... 40

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5 Parameter Setting ........................................................................................................................ 41
5.1 Operating Levels................................................................................................................................................... 41
5.2 Locking a Function............................................................................................................................................... 42
5.3 System Control...................................................................................................................................................... 43
5.3.1 Transfer Configuration .......................................................................................................................... 44
5.3.2 Parameter Sets ......................................................................................................................................... 45
5.3.3 Function Control...................................................................................................................................... 46
5.3.4 Calculation Blocks (TAN Option FW-E020)..................................................................................... 46
5.3.5 Time/Date .................................................................................................................................................. 46
5.3.6 Measuring Point Description .............................................................................................................. 46
5.3.7 Firmware Update (TAN Option FW-E106)....................................................................................... 46
5.3.8 Option Activation.................................................................................................................................... 47
5.3.9 Logbook ..................................................................................................................................................... 47
5.3.10 Measurement Recorder (TAN Option FW-E103) .......................................................................... 47
5.3.11 Buffer Table (TAN Option FW-E002).................................................................................................. 47
5.3.12 Concentration Table (TAN Option FW-E009)................................................................................. 48
5.3.13 Restore Factory Settings....................................................................................................................... 48
5.3.14 Passcode Entry ......................................................................................................................................... 48
5.4 Parameter Setting, General............................................................................................................................... 48
5.4.1 Configuring the Measurement Display........................................................................................... 49
5.4.2 Display......................................................................................................................................................... 54
5.4.3 Measurement Recorder (TAN Option FW-E103) .......................................................................... 54
5.5 Inputs and Outputs.............................................................................................................................................. 54
5.5.1 Current Outputs....................................................................................................................................... 55
5.5.2 Relay Contacts.......................................................................................................................................... 57
5.5.3 PID Controller ........................................................................................................................................... 61
5.5.4 Control Inputs........................................................................................................................................... 62
5.6 Sensor Selection [I] [II] ........................................................................................................................................ 63
5.7 Process Variable pH ............................................................................................................................................. 64
5.7.1 Sensor Data ............................................................................................................................................... 66
5.7.2 Calibration Presettings.......................................................................................................................... 68
5.7.3 Temperature Compensation of Process Medium........................................................................ 69
5.7.4 Delta Function.......................................................................................................................................... 70
5.7.5 Messages.................................................................................................................................................... 71
5.8 Process Variable ORP........................................................................................................................................... 72
5.8.1 Sensor Data ............................................................................................................................................... 73
5.8.2 Calibration Presettings.......................................................................................................................... 74
5.8.3 Delta Function.......................................................................................................................................... 74
5.8.4 Messages.................................................................................................................................................... 75
5.9 Process Variable Conductivity (Contacting)................................................................................................ 76
5.9.1 Sensor Data ............................................................................................................................................... 77
5.9.2 Calibration Presettings.......................................................................................................................... 79
5.9.3 Temperature Compensation of Process Medium........................................................................ 80
5.9.4 Concentration (TAN Option FW-E009)............................................................................................. 80
5.9.5 USP Function ............................................................................................................................................ 81
5.9.6 Messages.................................................................................................................................................... 82
5.10 Process Variable Conductivity (Inductive)................................................................................................... 83
5.10.1 Sensor Data ............................................................................................................................................... 85
5.10.2 Calibration Presettings.......................................................................................................................... 86
5.10.3 Concentration (TAN Option FW-E009)............................................................................................. 87
5.10.4 USP Function ............................................................................................................................................ 87
5.10.5 Messages.................................................................................................................................................... 88

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5.11 Dual Conductivity Measurement.................................................................................................................... 89
5.12 Process Variable Oxygen.................................................................................................................................... 89
5.12.1 Sensor Data ............................................................................................................................................... 92
5.12.2 Calibration Presettings.......................................................................................................................... 95
5.12.3 Pressure Correction ................................................................................................................................ 95
5.12.4 Salinity Correction .................................................................................................................................. 96
5.12.5 Messages.................................................................................................................................................... 96
5.13 Flow........................................................................................................................................................................... 97
5.14 HART Communication (TAN Option FW-E050).......................................................................................... 97
6 Calibration/Adjustment............................................................................................................... 98
6.1 Memosens Calibration/Adjustment .............................................................................................................. 98
6.2 Process Variable pH Calibration/Adjustment ............................................................................................. 99
6.2.1 Calibration Methods ..............................................................................................................................100
6.2.2 Temperature Compensation during Calibration .........................................................................101
6.2.3 Calibration/Adjustment Methods.....................................................................................................101
6.2.4 Calibration Mode: Calimatic................................................................................................................101
6.2.5 Calibration Mode: Manual....................................................................................................................103
6.2.6 Calibration Mode: Product...................................................................................................................104
6.2.7 Calibration Mode: Data Entry .............................................................................................................105
6.2.8 ISFET Zero Point Calibration Mode...................................................................................................105
6.2.9 Calibration Mode: Temperature.........................................................................................................106
6.3 Process Variable ORP Calibration/Adjustment ..........................................................................................107
6.3.1 Calibration Mode: ORP Data Entry....................................................................................................107
6.3.2 Calibration Mode: ORP Adjustment .................................................................................................107
6.3.3 Calibration Mode: ORP Check.............................................................................................................109
6.3.4 Calibration Mode: Temperature.........................................................................................................109
6.4 Process Variable Conductivity (Contacting) Calibration/Adjustment ...............................................110
6.4.1 Temperature Compensation during Calibration .........................................................................110
6.4.2 Calibration/Adjustment Methods.....................................................................................................111
6.4.3 Calibration Mode: Automatic..............................................................................................................111
6.4.4 Calibration Mode: Manual....................................................................................................................112
6.4.5 Calibration Mode: Product...................................................................................................................113
6.4.6 Calibration Mode: Data Entry .............................................................................................................114
6.4.7 Calibration Mode: Temperature.........................................................................................................114
6.5 Process Variable Conductivity (Inductive) Calibration/Adjustment .................................................. 115
6.5.1 Temperature Compensation during Calibration .........................................................................115
6.5.2 Calibration/Adjustment Methods.....................................................................................................116
6.5.3 Calibration Mode: Automatic..............................................................................................................116
6.5.4 Calibration Mode: Manual....................................................................................................................117
6.5.5 Calibration Mode: Product...................................................................................................................118
6.5.6 Calibration Mode: Zero Point..............................................................................................................119
6.5.7 Calibration Mode: Installation Factor...............................................................................................119
6.5.8 Calibration Mode: Data Entry .............................................................................................................120
6.5.9 Calibration Mode: Temperature.........................................................................................................120
6.6 Process Variable Oxygen Calibration/Adjustment ...................................................................................121
6.6.1 Calibration/Adjustment Methods.....................................................................................................122
6.6.2 Calibration Mode: In Air........................................................................................................................122
6.6.3 Calibration Mode: In Water..................................................................................................................123
6.6.4 Calibration Mode: Data Entry .............................................................................................................124
6.6.5 Calibration Mode: Product...................................................................................................................125
6.6.6 Calibration Mode: Zero Point..............................................................................................................126
6.6.7 Calibration Mode: Temperature.........................................................................................................127

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7 Diagnostics ...................................................................................................................................128
7.1 Favorites Menu......................................................................................................................................................128
7.2 Diagnostic Functions ..........................................................................................................................................129
7.2.1 Overview of Diagnostic Functions....................................................................................................129
7.2.2 Messages....................................................................................................................................................129
7.2.3 Logbook .....................................................................................................................................................129
7.2.4 Device Information.................................................................................................................................130
7.2.5 Device Test.................................................................................................................................................131
7.2.6 Measuring Point Description ..............................................................................................................131
7.2.7 Channel I/II Diagnostic Functions .....................................................................................................131
8 Maintenance .................................................................................................................................133
8.1 Overview of Maintenance Functions ............................................................................................................ 133
8.2 Channel I/II Maintenance Functions..............................................................................................................134
8.2.1 Sensor Monitor.........................................................................................................................................134
8.2.2 Maintenance Functions for Oxygen Sensors ................................................................................134
8.3 Manual Function Check .....................................................................................................................................134
8.3.1 Current Source .........................................................................................................................................134
8.3.2 Relay Test....................................................................................................................................................134
8.3.3 Controller Test ..........................................................................................................................................134
9 Decommissioning.........................................................................................................................135
9.1 Disposal....................................................................................................................................................................135
9.2 Returns ..................................................................................................................................................................... 135
10 Troubleshooting ...........................................................................................................................136
10.1 Malfunction States...............................................................................................................................................136
10.2 Error Messages ......................................................................................................................................................137
10.3 Sensocheck and Sensoface...............................................................................................................................151
11 Accessories....................................................................................................................................153
11.1 Memory Card ......................................................................................................................................................... 153
12 Specifications................................................................................................................................155
12.1 Power........................................................................................................................................................................155
12.2 Inputs and Outputs (SELV, PELV)..................................................................................................................... 155
12.3 Device....................................................................................................................................................................... 157
12.7 Interfaces................................................................................................................................................................. 158
12.8 Measuring Functions...........................................................................................................................................159
12.8.1 pH .................................................................................................................................................................159
12.8.2 Cond.............................................................................................................................................................161
12.8.3 CondI ...........................................................................................................................................................162
12.8.4 Oxygen........................................................................................................................................................163
12.8.5 Temperature Compensation (Conductivity)..................................................................................165
12.8.6 Concentration Determination, Conductivity (TAN Option FW-E009) ..................................165
12.9 Diagnostics and Statistics.................................................................................................................................. 166

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13 Annex ............................................................................................................................................167
13.1 Channel II Wiring Examples .............................................................................................................................. 168
13.1.1 pH Analog Wiring Examples................................................................................................................168
13.1.2 ORP Analog Wiring Example...............................................................................................................174
13.1.3 Contacting Conductivity Wiring Examples....................................................................................175
13.1.4 Inductive Conductivity Wiring Examples .......................................................................................182
13.1.5 Dual Conductivity Wiring Examples.................................................................................................184
13.1.6 Oxygen Wiring Examples .....................................................................................................................187
13.2 Buffer Tables ...........................................................................................................................................................189
13.3 Calibration Solutions...........................................................................................................................................197
13.4 TAN Options ...........................................................................................................................................................199
13.4.1 pH Buffer Table: Entry of Individual Buffer Set (FW-E002)........................................................199
13.4.2 Current Characteristic (FW-E006) ......................................................................................................201
13.4.3 Concentration Determination (FW-E009).......................................................................................201
13.4.4 Calculation Blocks (FW-E020)..............................................................................................................206
13.4.5 HART (FW-E050).......................................................................................................................................209
13.4.6 Parameter Sets 1-5 (FW-E102) ............................................................................................................210
13.4.7 Measurement Recorder (FW-E103)...................................................................................................211
13.4.8 Firmware Update (FW-E106) ...............................................................................................................213
14 Basics .............................................................................................................................................215
14.1 Basics of PID Control............................................................................................................................................ 215
Index..............................................................................................................................................217

Stratos Multi E401N
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1 Safety
The following safety instructions contain the necessary information for the safe use of the product.
If you have any questions, please contact Knick Elektronische Messgeräte GmbH & Co. KG using the
information provided on the back page of this document.
1.1 Intended Use
Stratos Multi is an industrial transmitter in 4-wire technology. In the field of liquid analysis, it can
measure pH values, ORP, conductivity (contacting and inductive), and oxygen content both dissolved
and in the gaseous phase.
Alongside a permanently installed measuring channel I for Memosens sensors, the modular
transmitter has a slot that can be equipped with any analog or digital measuring module (measuring
channel II). The transmitter can be extended with device-specific add-on functions called TAN options.
The defined rated operating conditions must be observed when using this product. These conditions
are set out in full in the Specifications chapter of the user manual as well as in parts in the installation
guide for the Stratos Multi.
Using the product improperly or for any purpose other than the product's intended purpose is not
permitted and may result in injury to persons or damage to objects or the environment.
1.2 Symbols and Markings on the Product
Attaching the CE marking to the product means that the product satisfies the applicable requirements
specified in the European Union harmonization legislation.
Special conditions and the product’s possible danger points. Read the user manual,
observe the specifications, and follow the instructions in the safety guide.
Reminder to read the documentation
Protection class II
1.3 Personnel Requirements
The operating company must ensure that personnel are sufficiently qualified in accordance with the
local and national codes and regulations that apply for the area in which the product is being used.
The personnel must be authorized by the operating company and instructed in handling this product.
Personnel Jobs in the process industry
Technicians Operation of machines and plants, failure elimination
Electricians Installation, systematic troubleshooting and maintenance of machines and plants
System specialists Setup and commissioning, parameter setting, calibration, and adjustment on
the administrator level of the Stratos Multi.
1.4 Safety Training
Upon request, Knick Elektronische Messgeräte GmbH & Co. KG will provide safety instruction and
product training during initial commissioning of the product. Further information is available from
the relevant Knick representatives.

Stratos Multi E401N
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1.5 Installation and Commissioning
Observe all applicable local and national codes and standards for the installation of electrical
equipment. Information on installation is provided in the installation guide for the Stratos Multi.
Cable
Only use cables with a suitable temperature resistance.
Transmitter Cable temperature resistance
Stratos Multi E401N 75 °C / 167 °F or higher
Mains Connection
The transmitter does not have a power switch. An appropriately arranged and accessible disconnect-
ing device for the transmitter must be present in the system installation. The disconnecting device
must disconnect all non-grounded, current-carrying wires. The disconnecting device must be labeled
in a way that enables the associated transmitter to be identified. The power line may carry dangerous
touch voltages. Touch protection must be ensured by proper installation.
Inputs and Outputs (SELV, PELV)
All inputs and outputs must be connected to SELV/PELV circuits.
Parameter Setting, Calibration, and Adjustment
Incorrect parameter setting, calibration, and adjustment can result in incorrect outputs.
For this reason, Stratos Multi must be commissioned by a specialist, who will also set the parameters,
calibrate and adjust the transmitter.
Relay Contacts
Make sure that the maximum ratings of the relay contacts are not exceeded even during switching.
Relay contacts are subject to electrical erosion. Especially with inductive and capacitive loads,
the service life of the relay contacts will be reduced.
Degree of Protection
The housing of the device is dust-tight and offers complete protection against contact as well as
protection against strong water jets.
• Europe: IP protection IP66/IP67
• USA: NEMA4X Outdoor (with pressure compensation)
Memory Card
Dangerous touch voltage may be present in the terminal compartment when the device is opened.
Professional installation guarantees direct contact protection.
The memory card can be replaced during operation. When doing so, maintain sufficient distance from
the power lines and do not use tools.

Stratos Multi E401N
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1.6 Maintenance and Repair
Maintenance
Maintenance work on the Stratos Multi and the sensors is only permitted in the function check (HOLD)
mode, since otherwise there is a risk of unexpected system behavior.
The function check (HOLD) mode is activated on the device during:
• Calibration (the selected channel only)
• Maintenance (current source, measuring points)
• Parameter setting on the operator and administrator levels
Repair
The Stratos Multi and measuring module cannot be repaired by the user. To request a repair, please
contact Knick Elektronische Messgeräte GmbH & Co. KG by visiting www.knick.de.
1.7 Residual Risks
The product has been developed and manufactured in accordance with generally accepted safety
rules and regulations. However, it is not possible to rule out all risks.
The effects of moisture, ambient temperature, chemicals, and corrosion can negatively impact the safe
operation of the product. Please observe the following instructions:
Knick Elektronische Messgeräte GmbH & Co. KG recommends that the Stratos Multi E401 is installed in
a weather-proofed area of the plant or that a cover is used for protection against the weather.

Stratos Multi E401N
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2 Product
2.1 Design and Function
Stratos Multi is designed as follows:
• The 1- and 2-channel transmitter permits a free combination of the pH/ORP process variables,
conductivity (2-/4-electrode sensors, toroidal sensors), and oxygen, and can, for example,
simultaneously measure pH values and conductivity.
• The device has four current outputs (active/passive).
• Add-on product options can be enabled by entering a transaction number (TAN).
• The color TFT display has white backlighting and provides clear information on errors during
parameter setting or measurement in accordance with NAMUR recommendations.
• The user interface is multi-lingual with full-text menu navigation presently available in
the following languages: German, English, French, Italian, Spanish, Portuguese, and Chinese.
Function TAN option
1 measuring channel
2 current outputs
Second measuring channel via add-on measuring module
3rd and 4th current outputs X
Multiparameter: Process variables freely selectable from pH, ORP, oxygen,
conductivity (contacting/inductive)
Door contact
HART X
3 freely assignable relay contacts
for NAMUR messages (failure, maintenance required, out of specification, function check),
setpoint alarm relay, controller, rinse contact parameter set, USP (for conductivity), Sensoface
Function check input (HOLD)
2 control Inputs
Flow measurement
Current Input X

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2.2 Product Range and Options
Version Possible combinations
1-channel (basic unit) 1x Memosens sensor
1x SE740 optical oxygen sensor
1x analog sensor via measuring module (MK module)
2-channel 2x Memosens sensors (1x via MK module)
1x Memosens sensor (MK module)
and 1x SE740 optical oxygen sensor
1x Memosens sensor
and 1x analog sensor via measuring module (MK module)
1x CC measuring module for dual conductivity measurement
The transmitters have the designations E401N for safe areas.
Product Line
Device (digital basic unit) Order No.
Stratos E401N E401N
Measuring module for analog sensors or 2-channel Memosens,
non-intrinsically safe
Order No.
pH value, ORP measurement MK-PH015N
Oxygen measurement MK-OXY046N
Contacting conductivity measurement (process-wetted) MK-COND025N
Toroidal conductivity measurement MK-CONDI035N
Dual conductivity measurement MK-CC065N
Memosens multiparameter (for 2-channel version) MK-MS095N
The following add-on functions (TAN options) can be enabled by entering a TAN:
Add-on function (TAN option) Order No.
pH buffer table: Entry of individual buffer set FW-E002
Current characteristic FW-E006
Concentration determination for use with conductivity sensors FW-E009
Oxygen measurement in low oxygen concentrations FW-E015
Operation with double high-impedance pH sensors FW-E017
Calculation blocks FW-E020
HART FW-E050
Current input FW-E051
Current outputs 3 and 4 FW-E052
Parameter sets 1 to 5 FW-E102
Measurement recorder FW-E103
Logbook, in conjunction with Data Card FW-E104
Firmware update FW-E106
Mounting accessories Order No.
Pipe-mount kit ZU0274
Panel-mount kit ZU0738
Protective hood ZU0737
M12 socket for sensor connection
with Memosens cable/M12 connector
ZU0860

Stratos Multi E401N
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Operation with Analog Sensors
To enable operation with analog sensors, analog measuring modules are plugged in and must be
configured during initial start-up.
Operation with Optical Sensors
The SE740 digital optical oxygen sensor can be directly connected to Stratos Multi.
Parameter Sets
Two complete parameter sets (A, B) can be stored in the device. The control element for switching
between the parameter sets (optocoupler input OK1, softkey) is selected in the system control.
The currently activated set can be signaled by a relay contact.
Power Supply
Current is provided through a universal mains supply 80...230VAC, 45... 65Hz/24...60VDC.
HART Data Transmission
Device identification, measured values, statuses and messages, calibration data, configurations of the
current loop, and HART variables are transmitted using HART
communication.➜HART (FW-E050), p. 209

Stratos Multi E401N
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2.3 System Overview
1
2
3
4
5
6
7
8
9
10
Stratos Multi E401N
1Input for Memosens sensors or SE740 optical oxygen
sensor
6Current output 1: 0/4 … 20mA/HART active or
passive (TAN option FW-E050 HART: 4… 20mA)
2Power output 3/15/24V for SE740 optical oxygen
sensor or external transmitter
7Current outputs 2/3/4:
Active or passive (current outputs 3 and 4:
TAN option FW-E052)
3Port for an analog MK module or Memosens
via MK-MS module
8Relay contact K1: Messages, limits, rinse contact, ...
4Optocoupler inputs OK1/OK2
OK1: Parameter set selection A/B, flow, …
OK2: Function check (HOLD)
9Relay contacts 2/3: Controller or messages, limits,
rinse contacts, ...
5Current input 0/4 … 20mA for external pressure
transmitter (TAN option FW-E051)
10 Power input:
80 … 230VAC/24 … 60VDC <15VA/10W

Stratos Multi E401N
15
2.3.1 Typical Applications
Memosens pH Measurement and PID Control
24 V
AC/DC
MS pH
Stratos Multi E401N
Alarm
Acid
Brine
PID control
Alarm
Acid Brine

Stratos Multi E401N
16
Memosens Oxygen Measurement and Pressure Correction with External Pressure Transmitter
(with TAN Option FW-E051 “Current Input”)
MS Oxy
e.g. + 24 V
Pressure Transmitter
Stratos Multi E401N

Stratos Multi E401N
17
2.4 Package Contents and Product Identification
• Basic device Stratos Multi
• Bag containing small accessory parts (2xplastic closure, 1xhinge pin, 1xwasher, 2xinsertable
jumper, 1xreduction sealing insert, 1xmultiple sealing insert, 2xblanking plug, 5xcable gland and
hex nut M20x1.5)
• Test Report acc. to EN 10204
• Installation Guide
• Safety Guide
Note: Check all components for damage upon receipt. Do not use damaged parts.
Measuring modules are not included in the basic unit’s package contents.
45
6
7
8
9
10
2
3
1
11
12
13
1Front unit 8Housing screw (4x)
2Rear unit 9Reduction sealing insert (1x)
3Holes for cable glands 10 Multiple sealing insert (1x)
4Plastic sealing plug (2x),
for sealing in case of wall mounting
11 Blanking plugs (2x)
5Hinge pin (1x), insertable from either side 12 Cable gland (5x)
6Washer (1x), for conduit mounting:
Place washer between housing and nut
13 Hex nut (5x)
7Insertable jumper (2x)

Stratos Multi E401N
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2.4.1 Nameplate
13
76
8
2
4
9
10
11
5
1 Name of manufacturer 6 Protection class II
2 Product name 7 Power supply
3 CE marking 8 Manufacturer’s address with barcode
4 Special conditions: Read the user man-
ual, observe the specifications, and fol-
low the instructions in the safety guide.
9 Permissible ambient temperature, protection class
10 Product number/Serial number/Production year and week
5 Reminder to read the documentation 11 Model designation
You can view the device type, serial number, and firmware, hardware, and bootloader versions of your
device in the Diagnostics menu: Menu  Diagnostics  Device Information
➜Device Information, p. 130
2.5 Symbols and Markings on the Display
Function check in accordance with NAMUR NE 107
Wrench symbol on orange background
The NAMUR “HOLD” contact is active. Current outputs as configured:
Currently measured value: The currently measured value appears at the current output.
Last measured value: The last measured value is held at the current output.
Fixed value: The current output supplies a fixed value.
Out of specification in accordance with NAMUR NE 107
Black question mark on yellow background
The NAMUR “Out of Specification” contact is active.
Error message: Diagnostics Message List
Failure in accordance with NAMUR NE 107
Flashing black cross symbol on red background
The NAMUR “Failure” contact is active.
Error message: Diagnostics Message List
Maintenance required in accordance with NAMUR NE 107
Oil can symbol on blue background
The NAMUR “Maintenance Required” contact is active.
Error message: Diagnostics Message List
The device is in calibration mode. Function check (HOLD) is active.
The device is in maintenance mode. Function check (HOLD) is active.
The device is in parameter setting mode. Function check (HOLD) is active.
The device is in diagnostics mode.

Stratos Multi E401N
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Selectable parameter sets (A/B). Indicates which parameter set is currently active when a control element
for parameter set selection was selected:
Parameter Setting System Control Function Control
A “closed” Data Card (memory card) is located in the device. The memory card can be removed.
If you want to continue using the card, select “Open Memory Card” in the Maintenance menu.
There is an enabled Data Card (memory card) in the device.
Note: Select “Close Memory Card” in the Maintenance menu before removing the memory card.
There is an FW Update Card (memory card) in the device. You can save the current device firmware or
perform a firmware update from the memory card
Note: Check the parameter settings after updating.
Free firmware repair in the event of device errors. The TAN option FW-E106 is not required here.
General data cannot be stored on this card.
I
II
Designates the measuring channel for clear assignment of measured-value/parameter displays in the
case of identical process variables.
Channel I: Memosens sensor/SE740 optical oxygen sensor (LDO)
Channel II: Measuring module for analog sensor or second Memosens sensor
IIA
IIB
Channel IIA: First channel in MK-CC module
Channel IIB: Second channel in MK-CC module
CI
CII
Channel CI: Calculation block 1
Channel CII: Calculation block 2
To the left of a menu line that contains a further menu level.
Pressing Enter opens the submenu.
To the left of a menu line that, at administrator level, can be blocked from access at operator level.
To the left of a menu line that, at administrator level, was blocked from access at operator level.
When in measuring mode, Sensoface smileys indicate the quality of the sensor data:
Happy
Neutral
Sad
Wait; device is busy.
To the left of a Diagnostics menu item set as a “Favorite”.

Stratos Multi E401N
20
3 Commissioning
3.1 Assembly
Note: Use only a suitable Phillips head screwdriver to open the housing. Do not use sharp or pointed
objects.
1
2
4
3
5
6
6
Assembling the Housing
01. Install the cable glands (5) from the bag containing small accessory parts in the rear unit.
As required, insert sealing plugs (3) in the event of wall mounting.
➜Package Contents and Product Identification, p. 17
02. Insert blanking plugs in unused cable glands (4).
➜Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts, p. 26
03. Push in the hinge pin (5) to connect the front unit (1) and rear unit (2).
04. Tighten the captive enclosure screws (6) on the front of the front unit (1) in diagonal sequence
using a Phillips head screwdriver.
05. Select mounting type and install.
✓Pipe mounting ➜Pipe Mounting ZU0274, p. 23
✓Panel mounting ➜Panel-Mount Kit ZU0738, p. 25
✓Protective hood ➜Protective Hood for Wall and Pipe Mounting ZU0737, p. 24