Endress+Hauser Micropilot NMR81 Instructions for use

Free space radar for liquids with output signal 4...20 mA and switch output

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Special Documentation

Micropilot NMR81/84

Functional Safety Manual

SD01891G/00/EN/03.18

71413288

2018-08-10

Micropilot NMR81/84

2 Endress+Hauser

Table of contents

Declaration of Conformity .................... 3

Other safety-related characteristic values ............. 4

Useful lifetime of electric components ................ 5

Certificate ................................ 5

Document information ....................... 6

Document function ............................ 6

Using this document ........................... 6

Symbols used ................................ 6

Supplementary device documentation ................ 7

Permitted devices types ...................... 8

SIL label on the nameplate ....................... 9

Safety function ............................. 9

Definition of the safety function .................... 9

Safety-related signal ........................... 9

Restrictions for use in safety-related applications ....... 10

Use in protective systems .................... 12

Device behavior during operation .................. 12

Parameter configuration for safety-related applications ... 13

Proof-testing ............................... 19

Life cycle ................................ 28

Requirements for personnel ..................... 28

Installation ................................. 28

Commissioning .............................. 28

Operation ................................. 28

Maintenance ............................... 28

Repairs ................................... 29

Modification ................................ 29

Appendix ................................ 30

Structure of the measuring system ................. 30

Proof-testing ............................... 32

Information regarding redundant connection of multiple

sensors ................................... 32

Further information ........................... 32

Micropilot NMR81/84

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Declaration of Conformity

A0037370

Micropilot NMR81/84

4 Endress+Hauser

A0037371

Other safety-related

characteristic values Characteristics as per IEC 61508 Value

MTBF 1) 25 years

System reaction time as per DIN EN 61508-2 In "Expert mode":

User configurable

1) According to Siemens SN29500. This value takes into account failure types relevant to the function of the

electronic components.

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Useful lifetime of electric

components

The established failure rates of electrical components apply within the useful lifetime as per

IEC 61508-2:2010 section 7.4.9.5, note 3. In accordance with DIN EN 61508-2:2011 section

7.4.9.5, national footnote N3, appropriate measures taken by the manufacturer and operator can

extend the useful lifetime.

Certificate

A0036652

Micropilot NMR81/84

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Document information

Document function The document is part of the Operating Instructions and serves as a reference for application-specific

parameters and notes.

• General information about functional safety: SIL

• General information about SIL is available:

In the Download Area of the Endress+Hauser Internet site: www.de.endress.com/SIL

Using this document Information on the document structure

For the arrangement of the parameters as per the Operation menu, Setup menu, Diagnostics

menu, along with a short description, see the Operating Instructions for the device

Symbols used Safety symbols

Symbol Meaning

DANGER

DANGER!

This symbol alerts you to a dangerous situation. Failure to avoid this situation will

result in serious or fatal injury.

WARNING

WARNING!

This symbol alerts you to a dangerous situation. Failure to avoid this situation can

result in serious or fatal injury.

CAUTION

CAUTION!

This symbol alerts you to a dangerous situation. Failure to avoid this situation can

result in minor or medium injury.

NOTICE

NOTE!

This symbol contains information on procedures and other facts which do not result in

personal injury.

Symbols for certain types of information

Symbol Meaning

A0011193

Tip

Indicates additional information.

Reference to documentation

Reference to page

Reference to graphic

… Series of steps

Symbols in graphics

Symbol Meaning

1, 2, 3,... Item numbers

… Series of steps

A, B, C, ... Views

Micropilot NMR81/84

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Supplementary device

documentation Documentation Comment

Technical Information:

• TI01252G/00 (NMR81)

• TI01253G/00 (NMR84)

The documentation is available on the Internet:

→ www.endress.com

Operating Instructions

• BA01450G/00 (NMR81)

• BA01453G/00 (NMR84)

The documentation is available on the Internet:

→ www.endress.com

Brief Operating Instructions (HART):

• KA01194G/00 (NMR81)

• KA01197G/00 (NMR84)

• The document is provided with the device.

• The documentation is available on the Internet:

→ www.endress.com

Safety instructions depending on the selected option

"Approval".

Additional safety instructions (XA, ZE) are supplied with

certified device version.

Please refer to the nameplate for the relevant safety

instructions.

This supplementary Safety Manual applies in addition to the Operating Instructions, Technical

Information and ATEX Safety Instructions. The supplementary device documentation must be

observed during installation, commissioning and operation. The requirements specific for the

protection function are described in this Safety Manual.

Micropilot NMR81/84

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Permitted devices types

The details pertaining to functional safety in this manual relate to the device versions listed below

and are valid as of the specified software and hardware version. Unless otherwise specified, all

subsequent versions can also be used for safety instrumented systems. . A modification process

according to IEC 61508 is applied for device changes.

Valid device versions for safety-related use:

Order code Designation Option

010 Approval All

020 Connector type All

030 Power supply; display All

040 Primary output see next table

050 Secondary I/O analog see next table

060 Secondary I/O digital Ex d/XP see next table

070 Housing All except Y9

090 Electrical connection All

100 Antenna All

130 Process seal All

140 Process connection All

150 Accuracy, approval for custody transfer All

500 Operating languages; display All

540 Application package All

570 Service All

580 Test; certificate All

590 Additional approval LA 1) SIL

610 Accessory mounted All

620 Accessory enclosed All

850 Firmware version If no version is selected here, the latest SIL-

enabled SW is supplied. Alternatively, the

following SW version may be selected:

01.02.zz or 01.03.zz

895 Marking All

1) An additional selection of further versions is possible.

Order code 040 050 060

Option

E1 * *

H1 * *

* A1 *

* A2 *

* B1 *

* B2 *

* C2 *

* * A1

* * A2

* * A3

Micropilot NMR81/84

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Order code 040 050 060

* * B2

* * B3

* All options are possible. (This selection does not affect SIL capability.)

• Valid firmware version: as of 01.02.zz or 01.03.zz (→ nameplate of the device)

• Valid hardware version (electronics): as of date of production 23.11.2016 (→ nameplate of the

device)

SIL label on the nameplate SIL certified devices are marked with the following symbol on the nameplate:

Safety function

Definition of the safety

function

The device's safety functions are:

Safety function 1 (level measurement)

• Maximum point level monitoring (overfill protection)

• Minimum point level monitoring (dry run protection)

• Level range monitoring

The safety functions comprise the measurement of the level of a liquid.

Safety-related signal Digital

The device's safety-related signal is the closed relay contact of the digital output. All safety measures

refer to this signal exclusively.

The level value (safety function 1: level measurement) or the analog input current (safety function 2:

current input measurement) are correctly converted to a digital output value. The relay contact is

closed within the range of validity, and is open outside this range.

The safety-related output signal is fed to a downstream logic unit, e.g. a programmable logic

controller or a limit signal transmitter where it is monitored for the following:

• Exceed and/or undershoot a specific level limit.

• The occurrence of a fault, e.g. contact open (interruption of the signal line).

In case of fault it must be ensured that the equipment under control achieves or maintains a

safe state.

Analog

The device's safety-related signal is the analog output signal 4 to 20 mA. All safety measures refer to

this signal exclusively.

The device can also communicate via HART for information purposes and contains all the HART

features with additional device information.

The safety-related output signal is fed to a downstream logic unit, e.g. a programmable logic

controller or a limit signal transmitter where it is monitored for the following:

• Exceed and/or undershoot a specific level limit.

• The occurrence of a fault, e.g. error current (≤3.6 mA, ≥21.0 mA, interruption or short-circuit of

the signal line).

In case of fault it must be ensured that the equipment under control achieves or maintains a

safe state.

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Restrictions for use in safety-

related applications

• The measuring system must be used correctly for the specific application, taken into account the

medium properties and ambient conditions. Pay attention to the information concerning critical

process situations and installation conditions in the Operating Instructions/Technical Information.

The application-specific limits must be observed throughout the entire safety life cycle.

• Information on the safety-related signal, (→  10).

• The specifications from the Operating Instructions must not be exceeded, (→  7).

• The following restrictions also applies to safety-related use:

– Strong, pulse-like EMC interference on the line can cause transient (<1 s) deviations ≥±2 % in

the output signal. For this reason, filtering with a time constant ≥1 s should be performed in the

downstream logic unit.

– The error range is device specific and is defined according to FMEDA (Failure Modes, Effects and

Diagnostic Analysis) on delivery. It includes all influential factors described in the Technical

Information (e.g. non-linearity, non-repeatability, hysteresis, zero drift, temperature drift, EMC

influences).

According to IEC / EN 61508 the safety related failures are classified into different categories,

see the following table. The table shows the implications for the safety-related analog output

signal and for measuring uncertainty.

Safety related error Explanation Implications for the

safety related output

signal

Implications for the

measuring uncertainty

(Position, see figure

→  10)

No device error Safe:

No error

None 1 Is within the

specification (see TI,

BA, ...)

λSD Safe detected:

Safe failure which can be

detected

Causes the output signal

to signal the failsafe mode

(see, →  12)

3 No implications

λSU Safe undetected:

Safe failure which cannot

be detected

Is within the defined error

range

2 May be beyond the

specification

λDD Dangerous detected:

Dangerous failure which

can be detected

(Diagnostic within the

device)

Causes the output signal

to signal the failsafe mode

(see, →  12)

3 No implications

λDU Dangerous undetected:

Dangerous failure which

cannot be detected

May be outside the

defined error range

4 May be outside the

defined error range

I [mA]

A0025264

A HI-Alarm ≥21 mA

B Error range ±2 %

C LO-Alarm ≤3.6 mA

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