Meister DWM/A-L User manual
DWM/A-L Module ATEX
Flow Monitor
Operating Instructions
Flow monitor for use
in explosion-hazard zones
Series DWM/A-L
Typ DWM/A-L1,5 thru DWM/A-
L100 Read the instructions prior to performing any task!
DWM/A-L Module ATEX, 1, en_US
© Meister Strömungstechnik GmbH 2014
Meister Strömungstechnik GmbH
Im Gewerbegebiet 2
63831 Wiesen
Germany
Telephone: +49 6096 9720 - 0
Fax: +49 6096 9720 - 30
Email: [email protected]
Internet: www.meister-flow.com
These instructions were compiled by:
Meister Strömungstechnik GmbH
Subject to change without notice
19.04.2017
DWM/A-L Module ATEX Flow Monitor
2
These instructions facilitate the safe
and efficient handling of a flow monitor
(referred to as "device" in the fol-
lowing). The instructions are an inte-
gral part of the device and must be
kept within easy reach for the per-
sonnel in the immediate vicinity of the
device at all times. Personnel must
carefully read and understand these
instructions before commencing all
work. The basic requirement for safe
work is adherence to all safety and
handling instructions stipulated in
these instructions. The local accident-
prevention regulations and general
safety standards and regulations for
the field of application of the device
also apply. Illustrations in these
instructions are provided to aid general
understanding and might deviate from
the actual model. No claims can be
derived from any such differences.
Limitations of liability
All details and instructions in this
manual have been compiled under
consideration of the valid standards
and regulations, the current state-of-
technology and our many years of
knowledge and experience. The manu-
facturer does not accept any liability
arising from:
nnon-observance of any details in
these instructions
nimproper use of the device, or use
that is not in accordance with
these instructions
nuse of non-trained personnel
nunauthorized retrofitting or tech-
nical changes that have not been
authorized by the manufacturer
nuse of non-approved replacement
parts
The duties and obligations agreed
upon in the delivery contract apply in
full, as well as the general terms and
conditions, the terms of delivery by the
manufacturer and the valid legal regu-
lations applicable at the conclusion of
the contract.
Copyright
These operating instructions are pro-
tected by copyright.
Except for internal purposes, transfer
of these instructions to third-parties,
copying them in any way
– even in part – as well as dissemina-
tion and/or communication of their con-
tent is forbidden without prior written
authorization from Meister Strömung-
stechnik ("manufacturer"). Violations
are subject to claims for indemnifica-
tion. The manufacturer reserves the
right to assert additional claims.
Copyright is the property of the manu-
facturer.
© Meister Strömungstechnik GmbH
Im Gewerbegebiet 2
63831 Wiesen
Germany
Supplemental instructions
19.04.2017 DWM/A-L Module ATEX Flow Monitor 3
Table of contents
1Overview...................................................................................................... 6
1.1 Short description.................................................................................. 6
1.2 Warranty and guarantee provisions..................................................... 6
1.3 Customer service................................................................................. 6
2 Safety........................................................................................................... 7
2.1 Explanation of symbols........................................................................ 7
2.2 Correct use in explosion-hazard zones................................................ 8
2.3 Special precautions for use in explosion-hazard zones..................... 10
2.3.1 Precautions for use in explosion-hazard zones.............................. 10
2.4 Personnel requirements..................................................................... 12
2.5 Personal safety equipment................................................................. 13
2.6 Protective systems............................................................................. 13
3 Areas of employment............................................................................... 14
3.1 Mechanical component (flow meter without limit switch contacts and
electrical accessories)........................................................................ 14
3.1.1 Exterior of the device...................................................................... 14
3.1.2 Interior of the device........................................................................ 14
3.1.3 General safety information for the mechanical component of the
device.............................................................................................. 15
3.1.4 Categorization of the mechanical component of the flow monitor... 16
3.1.5 List of media.................................................................................... 19
3.1.6 Applicable documents..................................................................... 21
3.2 Electrical component of the device (limiting contacts)....................... 24
3.2.1 Categorization of the electrical component of the flow monitor
(limit switch contacts)...................................................................... 24
3.2.2 Applicable documents..................................................................... 24
4 Operating data.......................................................................................... 36
4.1 Operating data for the mechanical component of the device............. 36
4.2 Switch contact operating data............................................................ 36
5 Transport, packaging and storage.......................................................... 38
Table of contents
19.04.2017
DWM/A-L Module ATEX Flow Monitor
4
6 Installation and initial startup.................................................................. 39
6.1 Safety................................................................................................. 39
6.2 Tools.................................................................................................. 39
6.3 Protection of the flow monitor............................................................. 39
6.4 Electrical connection.......................................................................... 39
6.5 Grounding the device......................................................................... 39
6.6 Contact protection measures............................................................. 39
7 Operation................................................................................................... 41
8Troubleshooting....................................................................................... 42
9 Maintenance.............................................................................................. 43
9.1 Return Materials................................................................................. 43
9.1.1 Return Materials Authorization........................................................ 43
10 Dissambly and disposal........................................................................... 44
11 Technical data........................................................................................... 45
11.1 Dimension sheet.............................................................................. 45
11.2 General specifications...................................................................... 48
11.3 Replacement parts........................................................................... 50
12 Appendix................................................................................................... 56
13 Index.......................................................................................................... 57
Table of contents
19.04.2017 DWM/A-L Module ATEX Flow Monitor 5
1 Overview
1.1 Short description
Fig. 1: DWM/A-L flow monitor
1 Switchpoint adjustment scale
2 Explosion-proof switch contact
with cast-on power cable
3 Mechanical indicator with display
scale and pointer
The flow monitor DWM/A monitors the
continuous flow of gaseous media. It is
designed for installation in pipe sys-
tems.
A float inside the device is moved by
the medium flowing through it. The
desired switch point can be set on the
switchpoint adjustment scale, whereby
the arrow on the switch contact is
aligned to the desired volume flow
value on the adjustment scale. The
pointer on the mechanical indicator
shows the actual flow rate.
Electrical monitoring is accomplished
by explosion-proof switch contacts.
The electrical connection is via the cast
on power cable.
1.2 Warranty and guar-
antee provisions
Warranty and guarantee provisions are
contained in the general terms and
conditions of the manufacturer.
1.3 Customer service
For technical information, please con-
tact our customer service department
(for contact details, see Page 2).
Furthermore, our staff is always inter-
ested in receiving new information and
experiences gained from application of
the device, which might be useful in
improving our products.
Overview
Customer service
19.04.2017
DWM/A-L Module ATEX Flow Monitor
6
2 Safety
This Chapter provides an overview of
important safety aspects required for
optimum protection of personnel as
well as for safe installation and safe
operation of the device.
Non-observance of the handling and
safety instructions listed in this manual
may result in hazardous/dangerous sit-
uations and in damage to property.
2.1 Explanation of sym-
bols
Safety instructions
Safety instructions in this manual are
marked by symbols. The safety instruc-
tions are preceded by signal words that
indicate the level of danger/hazard.
To prevent accidents or injuries to per-
sons as well as damage to property,
always observe the safety instructions
and proceed carefully.
DANGER!
This combination of symbol and
signal word indicates an imme-
diate, dangerous situation that
results in death or serious injury if
it is not avoided.
WARNING!
This combination of symbol and
signal word indicates a possibly
dangerous situation that might
result in death or serious injuries if
it is not avoided.
Safety
Explanation of symbols
19.04.2017 DWM/A-L Module ATEX Flow Monitor 7
CAUTION!
This combination of symbol and
signal word indicates a possibly
dangerous situation that might
result in minor or slight injuries if it
is not avoided.
NOTICE!
This combination of symbol and
signal word indicates a possibly
dangerous situation that might
result in damage to property and to
the environment if it is not avoided.
Tips and recommendations
This symbol emphasizes useful
tips and recommendations as well
as information for efficient and
failure-free operation.
Signs used in these instructions
The following symbols and highlighting
are used in these instructions to iden-
tify handling instructions, the descrip-
tion of results, lists/enumerations, ref-
erences and other elements:
Designates step-by-step han-
dling instructions.
ðDesignates a state or an
automatic sequence as a
result of a specific operating
step.
nDesignates randomly ordered enu-
merations and list entries
Ä
“Signs used in these instructions”
on page 8, designates references to
chapters in these instructions.
2.2 Correct use in
explosion-hazard
zones
The device is designed and con-
structed exclusively for the correct use
in accordance with these instructions.
The flow monitor serves exclusively for
monitoring the continuous flow of gas-
eous media.
The areas of application are specified
in Chapter 3 of these instructions.
The admissible operating conditions
are specified in Chapter 4 of these
instructions.
Safety
Correct use in explosion-hazard zones
19.04.2017
DWM/A-L Module ATEX Flow Monitor
8
Correct use of the device includes the
observance of all specifications in the
Operating Instructions for "DWM/A-L
Module BASICS" and "DWM/A-L
Module ATEX".
Any addition or different application,
above and beyond the correct use in
accordance with these instructions, is
deemed as incorrect use.
WARNING!
Danger due to incorrect use!
– Use the flow monitor only
within the stipulated perform-
ance limits
–Do not subject the flow mon-
itor to severe temperature fluc-
tuations
– Do not use the flow monitor
with quick-acting valves
– Do not use the flow monitor
with solenoid valves
– Do not subject the flow mon-
itor to vibrations
– Do not subject the flow mon-
itor to pressure surges
– Do not use the flow monitor
with media containing solids or
abrasives
– Only use the flow monitor with
media previously approved by
the manufacturer
– Do not use the flow monitor as
the sole monitoring device to
prevent dangerous conditions
– Do not install the flow monitor
as a load bearing part within a
pipeline system
– The flow monitor must be
installed so, as to preclude
damage by outside force. If
necessary, install an appro-
priate impact protection device
– The flow monitor may be
installed in explosion-hazard
zones only if:
Safety
Correct use in explosion-hazard zones
19.04.2017 DWM/A-L Module ATEX Flow Monitor 9
– the marking on the flow
monitor,
–the marking on the switch
unit installed on the flow
monitor,
– and the information con-
tained in the accompa-
nying documentation
(Operating Instructions
"DWM/A-L Module
BASICS" and "DWM/A-L
Module ATEX") authorize
such installation and oper-
ation
– Planning and design of equip-
ment, protective systems and
components is the responsi-
bility of the facility operator
– The facility operator must con-
sider the possible effects in
case of an explosion
– The facility operator is respon-
sible for the substitution, or the
reduction of the quantity of
substances, which may cause
an explosive atmosphere
All claims for damages due to incorrect
use are excluded. .
Incorrect use of the flow monitor may
result in dangerous situations.
2.3 Special precautions
for use in explosion-
hazard zones
The following chapter lists residual
risks that might arise from the device.
To reduce health risks and prevent
dangerous situations, observe the
safety instructions listed here, the
safety instructions listed in other chap-
ters of these Operating Instructions, as
well as all safety instructions listed in
the Operating Instructions for "DWM/A-
L Module BASICS"
These Operating Instructions
cannot cover all conceivable dan-
gers because many dangers arise,
not from the device itself, but from
the respective media flowing
through it. Always observe the
instructions on the appropriate
safety data sheets when using
hazardous media!
2.3.1 Precautions for use
in explosion-hazard
zones
Safety
Special precautions for use in explosion-hazard zones > Precautions for use in explosion-hazard zones
19.04.2017
DWM/A-L Module ATEX Flow Monitor
10
Table of contents
