IEC 61987-15:2016

IEC 61987-15 ®
Edition 1.0 2016-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process measurement and control – Data structures and elements in
process equipment catalogues –
Part 15: Lists of properties (LOPs) for level measuring equipment for electronic
data exchange
Mesure et commande des processus industriels – Éléments et structures de
données dans les catalogues d’équipements de processus –
Partie 15: Listes de propriétés (LOP) pour équipement de mesure de niveau pour
l’échange électronique de données

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IEC 61987-15 ®
Edition 1.0 2016-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process measurement and control – Data structures and elements in

process equipment catalogues –

Part 15: Lists of properties (LOPs) for level measuring equipment for electronic

data exchange
Mesure et commande des processus industriels – Éléments et structures de

données dans les catalogues d’équipements de processus –

Partie 15: Listes de propriétés (LOP) pour équipement de mesure de niveau

pour l’échange électronique de données

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.20 ISBN 978-2-8322-3718-2

– 2 – IEC 61987-15:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 General . 8
3.2 Level terms . 8
4 General . 8
4.1 Overview. 8
4.2 Special considerations . 8
4.3 Depiction of OLOP and DLOPs . 10
4.4 Example of DLOP block usage . 11
4.4.1 General specification of a free-space radar level transmitter . 11
4.4.2 General specification of a vibration level switch . 17
Annex A (normative) Operating list of properties for level measuring equipment . 20
Annex B (normative) Device lists of properties for level measuring equipment . 21
B.1 Level indicators . 21
B.1.1 Sight level indicator . 21
B.2 Level gauges . 21
B.2.1 Magnetic level gauge . 21
B.2.2 Sight level gauge . 21
B.3 Level switches . 21
B.3.1 Level switch . 21
B.3.2 Capacitance level switch . 22
B.3.3 Conductance level switch . 22
B.3.4 Displacer level switch . 22
B.3.5 Float level switch . 22
B.3.6 Guided-wave radar level switch . 22
B.3.7 Microwave level switch . 23
B.3.8 Nuclear level switch . 23
B.3.9 Optical level switch . 23
B.3.10 Rotary paddle switch . 23
B.3.11 Thermal level switch . 23
B.3.12 Vibrating level switch . 24
B.3.13 Ultrasonic level switch . 24
B.4 Level transmitters . 24
B.4.1 Level transmitter . 24
B.4.2 Capacitance level transmitter . 24
B.4.3 Conductance level transmitter. 25
B.4.4 Displacer level transmitter . 25
B.4.5 Free-space radar level transmitter . 25
B.4.6 Float level transmitter . 25
B.4.7 Guided-wave radar level transmitter . 25
B.4.8 Hydrostatic pressure level transmitter . 26
B.4.9 Laser level transmitter . 26
B.4.10 Plumb bob level transmitter . 26

B.4.11 Nuclear level transmitter . 26
B.4.12 Servo level transmitter . 26
B.4.13 Ultrasonic level transmitter . 27
B.5 Components . 27
B.5.1 Bypass/measuring chamber . 27
B.5.2 Separate level transmitter/switching unit . 27
B.5.3 Stilling well . 27
B.5.4 Window . 27
Annex C (normative) Property library . 28
Annex D (normative) Block library for considered device types . 29
Bibliography . 30

Figure 1 – Reference framework for the installation of level transmitters . 9
Figure 2 – Reference framework for the installation of level switches . 10

Table 1 – Example of free-space radar level transmitter . 11
Table 2 – Example for “vibration level switch” . 17

– 4 – IEC 61987-15:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL –
DATA STRUCTURES AND ELEMENTS IN PROCESS
EQUIPMENT CATALOGUES –
Part 15: Lists of properties (LOPs) for level measuring
equipment for electronic data exchange

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61987-15 has been prepared by subcommittee 65E: Devices and
integration in enterprise systems, of IEC technical committee 65: Industrial-process
measurement, control and automation.
The text of this standard is based on the following documents:
FDIS Report on voting
65E/507/FDIS 65E/517/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61987, published under the general title Industrial-process
measurement and control – Data structures and elements in process equipment catalogues,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 61987-15:2016 © IEC 2016
INTRODUCTION
The exchange of product data between companies, business systems, engineering tools, data
systems within companies and, in the future, control systems (electrical, measuring and
control technology) can run smoothly only when both the information to be exchanged and the
use of this information has been clearly defined.
Prior to this document, requirements on process control devices and systems were specified
by customers in various ways when suppliers or manufacturers were asked to quote for
suitable equipment. The suppliers in their turn described the devices according to their own
documentation schemes, often using different terms, structures and media (paper, databases,
CDs, e-catalogues, etc.). The situation was similar in the planning and development process,
with device information frequently being duplicated in a number of different information
technology (IT) systems.
Any method that is capable of recording all existing information only once during the planning
and ordering process and making it available for further processing, gives all parties involved
an opportunity to concentrate on the essentials. A precondition for this is the standardization
of both the descriptions of the objects and the exchange of information.
IEC 61987 series proposes a method for standardization which will help both suppliers and
users of measuring equipment to optimize workflows both within their own companies and in
their exchanges with other companies. Depending on their role in the process, engineering
firms may be considered here to be either users or suppliers.
The method specifies measuring equipment by means of blocks of properties. These blocks
are compiled into lists of properties (LOPs), each of which describes a specific equipment
(device) type. IEC 61987 series covers both properties that may be used in an inquiry or a
proposal and detailed properties required for integration of the equipment in computer
systems for other tasks.
IEC 61987-10 defines structure elements for constructing lists of properties for electrical and
process control equipment in order to facilitate automatic data exchange between any two
computer systems in any possible workflow, for example engineering, maintenance or
purchasing workflow and to allow both the customers and the suppliers of the equipment to
optimize their processes and workflows. IEC 61987-10 also provides the data model for
assembling the LOPs.
IEC 61987-11 specifies the generic structure for operating and device lists of properties
(OLOPs and DLOPs). It lays down the framework for further parts of IEC 61987 in which
complete LOPs for device types measuring a given physical variable and using a particular
measuring principle will be specified. The generic structure may also serve as a basis for the
specification of LOPs for other industrial-process control instrument types such as control
valves and signal processing equipment.
IEC 61987-15 concerns level measuring equipment. It provides one operating LOP for all
types of level measuring equipment which can be used, for example, as a request for various
sorts of quotation. The DLOPs for the various level transmitter and gauge types provided in
this part of IEC 61987 can be used in very different ways in the computer systems of
equipment manufacturers and suppliers, in CAE and similar systems of EPC contractors and
other engineering companies and especially in different plant maintenance systems of the
plant owners. The OLOP and the DLOPs provided correspond to the guidelines specified in
IEC 61987-10 and IEC 61987-11.

INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL –
DATA STRUCTURES AND ELEMENTS IN PROCESS
EQUIPMENT CATALOGUES –
Part 15: Lists of properties (LOPs) for level measuring
equipment for electronic data exchange

1 Scope
This part of IEC 61987 provides
• operating list of properties (OLOP) for the description of the operating parameters and the
collection of requirements for level measuring equipment, and
• device lists of properties (DLOPs) for the description of a range of level measuring
equipment types.
The structures of the OLOP and the DLOPs correspond to the general structures defined in
IEC 61987-11 and agree with the fundamentals for the construction of LOPs defined in
IEC 61987-10.
Aspects other than the OLOP, needed in different electronic data exchange processes
described in IEC 61987-10, will be published in IEC 61987-92 .
The locations of the libraries of properties and of blocks used in the LOPs concerned are
listed in the Annexes C and D.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61360 (all parts), Standard data element types with associated classification scheme for
electric components
IEC 61987-10:2009, Industrial-process measurement and control – Data structures and
elements in process equipment catalogues – Part 10: Lists of Properties (LOPs) for Industrial-
Process Measurement and Control for Electronic Data Exchange – Fundamentals
IEC 61987-11:__ , Industrial-process measurement and control – Data structures and
elements in process equipment catalogues – Part 11: Lists of Properties (LOPs) of measuring
equipment for electronic data exchange – Generic structures

___________
Under preparation. Stage at the time of publication: IEC/1CD 61987-92:2016.
Under preparation. Stage at the time of publication: IEC/CCDV 61987-11:2016.

– 8 – IEC 61987-15:2016 © IEC 2016
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions in IEC 61987-10 and
IEC 61987-11 apply.
3.2 Level terms
Definitions of specific level terms are to be found under the property attributes in the Common
Data Dictionary of the IEC.
4 General
4.1 Overview
The LOPs provided by this document are intended for use in electronic data exchange
processes performed between any two computer systems. The two computer systems can
both belong to the same company or they can belong to different companies as described in
Annex C of IEC 61987-10:2009.
The OLOP for level measuring equipment is to be found in Annex A while the DLOPs of the
individual level device types are to be found in Annex B.
Structural elements such as LOP type, block and property defined in this document are
available in electronic form in the “Process automation (IEC 61987 series)” domain of the IEC
Common Data Dictionary (CDD).
4.2 Special considerations
An important aspect of level measurement is the positioning and definition of the location of
the transmitter or switch. Figures 1 and 2 explain the reference framework used in this
document for continuous and point level measurement respectively.

i
L
d
c
b
a
L dp
IEC
Key
Points or planes
a datum point for vertical position (= bottom of vessel)
b lower tangent line
c zero level datum point
d full level datum point
Distances or measures
e reference height of zero level
f reference height of full level
g overall height of process equipment
h vertical position of nozzle (top installation)
i distance to inner process equipment wall
j length of process equipment nozzle
k vertical distance of lower process connection to zero level datum point
l vertical distance of lower process connection to full level datum point
m vertical position of nozzle (side installation)
n vertical distance of transmitter to high/single pressure process connection
o difference in height of end connections/process connections
p vertical distance of transmitter to low pressure process connection
Figure 1 – Reference framework for the installation of level transmitters
h
g
f
e
k j
m l
n o
p
– 10 – IEC 61987-15:2016 © IEC 2016
e
L
h
L
L
b
a
IEC
Key
Points or planes
a  datum point for vertical position (= bottom of vessel)
b  lower tangent line
Distances or measures
c  overall height of process equipment
d  vertical position of nozzle sealing surface (top installation)
e  distance to inner process equipment wall
f  vertical position of nozzle (side installation)
g  vertical position of nozzle (angled installation)
h  mounting angle of nozzle
I  switching distance referenced to the sealing surface
j  switching distance referenced to the insertion length
k  insertion length (sensor length)
Figure 2 – Reference framework for the installation of level switches
4.3 Depiction of OLOP and DLOPs
The properties of the OLOP and DLOPs used in this part of the IEC 61987 series have been
created in conformance with the requirements of the IEC 61360 series. As such, the structural
d
c
f
i
g
j
k
elements, properties and attributes to be found in the IEC Common Data Dictionary are
normative.
4.4 Example of DLOP block usage
4.4.1 General specification of a free-space radar level transmitter
A 10 m high tank is to be fitted with continuous level measurement. A top mounted nozzle
DN 100 already exists. The output signal has to include HART. Table 1 shows typical
properties which might be sent between a manufacturer and user (“…” indicates a property or
properties that have not been used).
Table 1 – Example of free-space radar level transmitter
Name of LOP type, block or property Assigned value Unit
Identification
manufacturer a. n. other
name of product product name abc123
type of product free-space radar level transmitter
...
Application
application description level measurement in liquids
Function and system design
measuring principle time-of-flight free space radar
operating frequency 26 GHz
Dependability
Functional safety and reliability
style of failsafe configurable min, max
...
safety integrity level up to SIL 3
reference standard for functional safety IEC 61508
...
Input
number of measured variables 2
Measured variable_1
measured variable type level measurement
Level measurement
...
Measuring range for level
lower range-limit of level 0 m
upper range-limit of level 15 m
...
Measured variable_2
measured variable type degree of filling measurement
Degree of filling measurement
...
Measuring range for degree of filling
lower range-limit of degree of filling 0 %
upper range-limit of degree of filling 100 %
...
base dielectric constant 2,0
...
base type of tank storage
base vessel conditions calm
– 12 – IEC 61987-15:2016 © IEC 2016
Name of LOP type, block or property Assigned value Unit
base deployment conditions obstruction-free path
number of outputs 1
Output
...
assigned process variable level
function of input/output continuous measurement
Type of output
output type analog current output
Analog current output
Assigned variable
assigned variable type assigned degree of filling range
Assigned degree of filling range
lower range-value of degree of filling 0 %
upper range-value of degree of filling 100 %
...
Analog current output parameters
…
power source behaviour passive
set power source behaviour passive
lower range end-value of current output 4 mA
upper range end-value of current output 20 mA
lower current limit of proportional range 3,8 mA
upper current limit of proportional range 20,5 mA
Current signal on alarm
current for lower signal on alarm 3,6 mA
current for upper signal on alarm 22,0 mA
configurability of signal on alarm min, max, user defined
set signal on alarm max
superimposed digital communication HART 6.0
...
number of galvanic isolations 1
Galvanic isolation
galvanic isolation of electrical circuits mutual isolation of all circuits
...
number of electrical terminals 3
Electrical terminal_1
designation of electrical terminal a
marking of electrical terminal
+ 4.20 mA/HART
Electrical terminal_2
designation of electrical terminal b
marking of electrical terminal – 4.20 mA/HART
Electrical terminal_3
...
description of electrical terminal cable shield ground
...
number of cable specifications 1
Cable specification
cable application loop-power
type of cable twisted shielded pairs
...
Performance
Name of LOP type, block or property Assigned value Unit
Reference conditions of the device
Reference ambient conditions
reference device deployment
vertical, no interference in beam,
1 m dia. metal reflector plate
reference ambient temperature 23,5;24,0;24,5 °C
...
reference absolute air pressure 860;960;1 060 mbar
...
reference humidity 55;60;75 %
...
number of performance variables 1
Performance variable
...
Type of performance variable
performance variable type absolute performance for level
Absolute performance for level
...
measured error of level 2 cm
...
zero point error of level 3 mm
...
Influence of external quantities expressed for level
average influence of ambient temperature on level 2 mm/
10 k
maximum influence of ambient temperature on level 5 mm
...
Dynamic behaviour
...
step response time T90 0,8 s
...
Rated operating conditions
Installation conditions
Deployment condition
mounting orientation vertical
...
installation instructions min. 1/6 vessel dia. from wall, not
central, not over fill stream
...
Environmental design ratings
Normal environmental conditions
number of ambient temperatures
Ambient temperature
…
minimum ambient temperature –40 °C
maximum ambient temperature °C
+80
...
climate class test Z/AD
reference standard for climate class EN 60068-2-38
...
Electromagnetic compatibility
...
– 14 – IEC 61987-15:2016 © IEC 2016
Name of LOP type, block or property Assigned value Unit
reference standard for electromagnetic compatibility EN 61326, all parts
classification
...
2 2
vibration resistance 20 to 2 000 Hz, 1 (m/s ) /Hz
reference standard for vibration resistance IEC 60068-2-64
Limiting environmental conditions
...
minimum limiting value of storage temperature –40 °C
maximum limiting value of storage temperature °C
+80
...
Process design ratings
Normal process conditions
...
minimum process gauge pressure –1 bar
...
maximum process gauge pressure +3 bar
minimum process temperature –40 °C
maximum process temperature +80 °C
...
minimum operating dielectric constant 1,9
...
Mechanical and electrical construction
Overall dimensions and weight
weight 3,4 kg
length 170,5 mm
width 135,6 mm
height 338,5 mm
...
Structural design
Structural design of a free-space radar level transmitter

Process connection
...
type of process connection UNI slip-on flange
nominal rating PN 16
nominal size DN 100
...
design code DIN 2502
quantity of holes 8
Material of construction
designation of material PP
....
Structural design of an antenna
type of antenna encapsulated horn
angle of emission
length of antenna 170,5 mm
maximum diameter of antenna 135,6 mm
...
Material of antenna
designation of material PBT
...
Name of LOP type, block or property Assigned value Unit
number of transmitter/switch housings 1
Transmitter/switch housing
type of housing electronics housing
...
designation of transmitter/switch GT20
...
mounting location integral
...
weight 1,9 kg
length 168 mm
width 120 mm
height 144 mm
...
material of housing
ALSi10Mg(<0,1 % Cu)
...
Connection facility
...
number of connection compartments 1
Connection compartment
...
degree of protection IP68
enclosure type no/class 6P
reference standard for enclosure NEMA
type no/class
material of connection compartment
…
type of terminal cage
quantity of terminals 2
…
minimum core cross-section 0,5 mm
maximum core cross-section 2,5 mm
minimum core cross-section AWG 20
maximum core cross-section AWG 14
type of protection non-ex
number of cable/conduit entries 1
Cable/conduit entry
quantity of cable/conduit entries 2
nominal size of cable/conduit entry M20
...
Operability
…
Parametrization
number of parametrization styles 1
Style of parametrization
Parametrization interface type
...
Keypad display
designation of display ID250
mounting style of display integrated
...
Handheld
– 16 – IEC 61987-15:2016 © IEC 2016
Name of LOP type, block or property Assigned value Unit
designation of handheld SSH770
configuration software of handheld SSH770 configurator
....
connection method of handheld via bluetooth modem
Computer
configuration software of computer PC configurator
auxiliary equipment required to make the connection ethernet/HART modem or
gateway
…
communication interface of computer ethernet
...
Power supply
number of electrical power input circuits 1
Electrical power input circuit
purpose of electrical power supply loop-power
quantity of wires 2
type of power supply active
rated voltage 24 V
minimum rated voltage 10,4 V
maximum rated voltage 35 V
type of voltage DC
...
normal power consumption 0,9 W
...
reaction on power failure configuration retained
...
reverse polarity protection yes
...
Certificates and approvals
number of approvals for general usage 1
Approval for general usage
type of general usage approval CE mark
...
Approval for use in special applications
...
number of overfill protection approvals 1
Overfill prevention protection approval
type of overfill prevention approval WHG approval
details of overfill prevention approval Z-65.16-524
Functional safety approval
functional safety requirement (SIL) assessment document 968/EL 882.xx/yy
functional safety approval body TÜV Rhineland
number of telecommunication compliances 1
Telecommunication compliance
type of telecommunication compliance EN 302729-1/2
details of telecommunication compliance implementing EU and EFTA
countries
…
4.4.2 General specification of a vibration level switch
A tank is to be retrofitted with point level measurement 30 cm from the top of a tank to
prevent liquid overspill. A top mounted nozzle already exists. The output signal is to be
PROFIBUS PA. The manufacturer knows from the data provided by the user in the OLOP that
the nozzle has a length of 15 cm measured from the sealing face. The manufacture proposes
the use of a top mounted vibration level switch. A general specification might be configured as
follows (see Table 2) (… indicates a property or properties that have not been used).
Table 2 – Example for “vibration level switch”
Name of LOP type, block or property Assigned value Unit
Identification
manufacturer A. N. Other
name of product product name XYZ 123
type of product level switch
…
Application
application description point level measurement in
liquids, slurries, etc.
Function and system design
measuring principle vibronics
…
Input
number of measured variables 1
Measured variable
measured variable type point level measurement
Point level measurement
…
Measuring range for point level
switching distance referenced to the insertion 13 mm
length
…
…
…
Digital communication
number of digital communication interfaces 1
Digital communication interface
…
type of digital communication PROFIBUS
Communication protocol
type of protocol PROFIBUS PA
protocol version 3.0
…
type of device profile digital input
version of device profile 1.0
…
…
Physical layer
type of physical layer IEC 61158-2
…
assigned baud rate 31,25 kbit/s
assigned address 254
number of wired communication interfaces 1

– 18 – IEC 61987-15:2016 © IEC 2016
Name of LOP type, block or property Assigned value Unit
Wired communication interface
Electrical data of a bus powered device
base current 12,5 mA
…
Electrical data for passive behaviour
rated voltage 24 V
minimum voltage 9 V
maximum voltage 32 V
…
Galvanic isolation
galvanic isolation of electrical circuits between sensor and power
supply
…
…
Line monitoring
reverse polarity protection yes
short-circuit monitoring yes
lead breakage monitoring yes
…
…
Performance
Reference conditions of the device
Reference ambient conditions
reference device deployment vertical from above
reference ambient temperature 23 °C
…
Reference device conditions
reference position of density selection switch
to “>> 0,7”
…
Reference process conditions
reference process material water
reference temperature of process material –50;23;120 °C
…
reference gauge pressure of process medium
…
reference density 0,5;1;1,5 g/cm
…
reference dynamic viscosity 1 mPa·s
…
Performance variable
…
Type of performance variable
performance variable type
absolute performance for point
level
Absolute performance for point level
…
measured error of point level 1 mm

non-repeatability of point level 0,1 mm
…
Influence of external quantities expressed for
point level
Name of LOP type, block or property Assigned value Unit
…
maximum influence of process temperature on 2,8 mm
point level
…
maximum influence of process pressure on point 2,8 mm
level
…
maximum influence of density on point level 4,8 mm
…
Dynamic behaviour of point level
hysteresis of point level 2 mm
…
response time for rising level 0,5 s
response time for falling level 1 s
…
minimum switching delay 0,5 s
maximum switching delay 60 s
…
…
…
– 20 – IEC 61987-15:2016 © IEC 2016
Annex A
(normative)
Operating list of properties for level measuring equipment
The OLOP has been created for all types of continuous and point level measuring equipment.
It is assigned to the area of level measuring equipment in the classification scheme for
process measuring equipment (see Table A.1 in IEC 61987-11:__ ):
• level indicator IEC-ABA692
• level gauge IEC-ABA649
• level switch IEC-ABA703
• level transmitter IEC-ABA803
NOTE The OLOP is in the property tree of all level measuring equipment and has the identifier IEC-ABE727.
The OLOP is available with all blocks and properties in the IEC CDD at:
http://std.iec.ch/cdd/iec61987/cdddev.nsf/TreeFrameset?OpenFrameSet.
___________
Under preparation. Stage at the time of publication: IEC/CCDV 61987-11:2016.
Viewed 2016-05-09.
Annex B
(normative)
Device lists of properties for level measuring equipment
B.1 Level indicators
B.1.1 Sight level indicator
The DLOPs of Annex B correspond to the classification scheme for measuring equipment
placed in Annex A of IEC 61987-11:__ :
The DLOP for a sight level indicator is assigned to the following node of the classificatio
...