Meister DWG, DWG-1, 5, DWG-18, DWG-3 Operating Instructions
...
Operating instructions
DWG Module BASICS
Flow Monitor
Series DWG
Type DWG-1,5 thru 50
Read this manual prior to performing any task!
Meister Strömungstechnik GmbH
Im Gewerbegebiet 2
63831 Wiesen
Germany
T
elephone: +49 6096 9720 - 0
Fax: +49 6096 9720 - 30
E-mail: sales@meister-flow.com
Internet: www.meister-flow.com
DWG Modul BASICS, 2, en_US
These instructions were compiled by:
Meister Strömungstechnik GmbH
Subject to change without notice
© Meister Strömungstechnik GmbH 2018
2
DWG Module BASICS Flow Monitor
03.09.2018
Supplemental directives
These instructions facilitate the safe
and ef
ficient handling of a flow monitor
(referred to as "device" in the following). The instructions are an integral part of the device and must be
kept within easy reach for the personnel 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 accidentprevention 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-oftechnology and our many years of
knowledge and experience. The manufacturer does not accept any liability
arising from:
n non-observance of any details in
these instructions
n improper use of the device, or use
that is not in accordance with
these instructions
n use of non-trained personnel
n unauthorized retrofitting or tech-
nical changes that have not been
authorized by the manufacturer
n use 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 regulations applicable at the conclusion of
the contract.
Copyright
These operating instructions are protected by copyright.
Except for internal purposes, transfer
of these instructions to third-parties,
copying them in any way
– even in part –
as well as dissemination and/or communication of their content is forbidden without prior written
authorization from Meister Strömungstechnik ("manufacturer"). Violations
are subject to claims for indemnification. The manufacturer reserves the
right to assert additional claims.
Copyright is the property of the manufacturer.
© Meister Strömungstechnik GmbH
Im Gewerbegebiet 2
63831 Wiesen
Germany
03.09.2018
DWG Module BASICS Flow Monitor
3
Table of contents
Table of contents
Overview................................................................................................... 10
1
1.1 Short description................................................................................ 10
1.2 Warranty and guarantee provisions................................................... 10
1.3 Customer service............................................................................... 10
2 Safety......................................................................................................... 1
2.1 Explanation of symbols...................................................................... 11
2.2 Correct use in accordance with these instructions............................ 13
2.3 Special precautions........................................................................... 14
2.3.1 Hazards from electrical current....................................................... 15
2.3.2 Mechanical hazards........................................................................ 15
2.3.3 Hazards from high or low temperatures......................................... 16
2.3.4 Radiation hazards........................................................................... 17
2.3.5 Hazards caused by media.............................................................. 17
2.4 Personnel requirements.................................................................... 18
2.5 Personal safety equipment................................................................ 18
2.6 Protective systems............................................................................ 19
2.7 Replacement parts............................................................................ 20
2.8 Environmental protection................................................................... 20
2.9 Responsibility of the owner................................................................ 21
3 Design and function................................................................................. 23
3.1 Overview............................................................................................ 23
3.2 Device description............................................................................. 23
3.3 Component description...................................................................... 24
4 Transport, packaging and storage......................................................... 25
4.1 Safety instructions for transport......................................................... 25
4.2 Transport inspection.......................................................................... 25
4.3 Packaging.......................................................................................... 25
4.4 Symbols on the shipping box............................................................. 26
4.5 Storage.............................................................................................. 26
5 Installation und initial startup................................................................. 28
5.1 Safety................................................................................................ 28
1
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DWG Module BASICS Flow Monitor
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Table of contents
5.2 Requirements at the place of installation........................................... 28
5.3 Preparatory work............................................................................... 29
5.4 Installation in the pipe system........................................................... 33
5.5 Initial startup...................................................................................... 37
5.6 Electrical connection.......................................................................... 38
5.6.1 Switch contact SG-30 with connector in compliance with
EN175301-803
............................................................................... 39
5.6.2 Switch contact SG-30 with plug connector M12x1......................... 40
5.6.3 Switch contact SG-30 with cable.................................................... 41
5.6.4 Degree of protection (IP-Code)...................................................... 42
5.7 Grounding the device........................................................................ 42
5.8 Plug connection................................................................................. 43
5.9 Contact protection measures............................................................. 45
6 Operation.................................................................................................. 47
6.1 Setting the switch point...................................................................... 47
6.2 Checking the flow.............................................................................. 49
7 Troubleshooting....................................................................................... 51
7.1 Safety................................................................................................ 51
7.2 Troubleshooting guide....................................................................... 53
8 Maintenance............................................................................................. 55
8.1 Safety................................................................................................ 55
8.2 Maintenance plan.............................................................................. 55
8.3 Removal from the pipe system.......................................................... 56
8.4 Disassembly...................................................................................... 58
8.5 Maintenance...................................................................................... 61
8.5.1 Cleaning......................................................................................... 62
8.5.2 Parts replacement.......................................................................... 63
8.5.3 Assembly........................................................................................ 63
8.5.4 Switch contact replacement............................................................ 70
8.6 Measures to be taken after maintenance work.................................. 72
9 Disassembly and disposal...................................................................... 73
9.1 Safety................................................................................................ 73
9.2 Disassembly...................................................................................... 73
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DWG Module BASICS Flow Monitor
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Table of contents
9.3 Return Materials................................................................................ 74
9.3.1 Return Materials Authorization....................................................... 74
9.4 Disposal............................................................................................. 74
10 Technical data.......................................................................................... 75
10.1 Device data plate............................................................................. 75
10.2 Switch contact data plate................................................................. 75
10.2.1 Switch contact data plate for UL Recognized switch contacts..... 75
10.3 Dimension sheet.............................................................................. 76
10.4 General specifications..................................................................... 77
10.5 Electrical specifications................................................................... 79
10.5.1 Electrical specifications for UL Recognized devices.................... 80
10.6 Measuring ranges............................................................................ 81
10.6.1 Standard measuring ranges......................................................... 81
10.7 Operating data................................................................................. 82
11 Annex........................................................................................................ 84
11.1 Tightening torque of screws............................................................. 84
11.2 Replacement parts........................................................................... 84
11.3 Tools................................................................................................. 86
11.4 Sealant............................................................................................. 86
11.5 Lubricants........................................................................................ 87
12 Index.......................................................................................................... 88
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List of figures
Fig. 1:
Fig. 2:
Fig. 3:
Fig. 4:
Fig. 5:
Fig. 6:
Fig. 7:
Fig. 8:
Fig. 9:
Fig. 10:
Fig. 11:
Fig. 12:
Fig. 13:
Fig. 14:
Fig. 15:
Fig. 16:
Fig. 17:
Fig. 18:
Fig. 19:
Fig. 20:
DWG flow monitor........... 10
Front view........................ 23
Switch contact and
female socket
.................. 24
Sight glass....................... 24
Installation position/direc-
tion of flow....................... 29
Unimpeded flow section.. 31
Unimpeded outlet............ 31
Strainer............................ 32
Apply sealing thread........ 35
Pipe connection with
sealing thread.................. 35
Screw in the device......... 36
Screw in the device......... 36
Switch position under no-
flow condition.................. 39
Pin assignment, plug
socket, normally-open
contact. The ground-pin
is not used....................... 39
Switch position under no-
flow condition.................. 39
Pin assignment, plug
socket, change-over contact. The ground-pin is
not used.
......................... 39
Pin-assignment, socket
M12x1 (Form 30x70)....... 40
Switch position under no-
flow condition.................. 40
Switch position under no-
flow condition.................. 40
Switch position under no-
flow condition.................. 41
Fig. 21:
Fig. 22:
Fig. 23:
Fig. 24:
Fig. 25:
Fig. 26:
Fig. 27:
Fig. 28:
Fig. 29:
Fig. 30:
Fig. 31:
Fig. 32:
Fig. 33:
Fig. 34:
Fig. 35:
Fig. 36:
Fig. 37:
Fig. 38:
Fig. 39:
Fig. 40:
List of figures
Switch position under noflow condition
.................. 42
Detach socket................. 43
Remove socket............... 43
Loosen inner section....... 43
Loosen the screw con-
nection............................. 44
Pin assignment, plug
socket, normally-open
contact (SG-30 with connector in compliance with
EN175301-803)............... 44
Pin assignment, plug
socket, change over contact (SG-30 with connector in compliance with
EN175301-803)............... 45
Example 1....................... 45
Example 2....................... 45
Protective measure
against capacitive loads.. 46
Example 1....................... 46
Example 2....................... 46
Loosen set screws.......... 47
Loosen set screws.......... 48
Reading-off the meas-
uring scale....................... 49
Loosen screws................ 59
Remove the process con-
nection (outlet)................ 59
Slot nozzle buffer O-
ring.................................. 60
Loosen screws................ 60
Remove the inner sec-
tion.................................. 61
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DWG Module BASICS Flow Monitor
7
Fig. 41:
Fig. 42:
Fig. 43:
Fig. 44:
Fig. 45:
Fig. 46:
Fig. 47:
Fig. 48:
Fig. 49:
Fig. 50:
Fig. 51:
Fig. 52:
Fig. 53:
Fig. 54:
Fig. 55:
Fig. 56:
Fig. 57:
Fig. 58:
Fig. 59:
Fig. 60:
Fig. 61:
Fig. 62:
Fig. 63:
Fig. 64:
Remove slot nozzle......... 61
O-ring (seal).................... 63
O-ring (glass buffer)........ 64
Position of O-rings........... 64
O-ring (centering the slot
nozzle)
............................. 64
Insert slot nozzle............. 65
Centering the slot
nozzle.............................. 65
Float................................ 66
Process connection
(Inlet)............................... 66
Spanner flats................... 67
Insert the process connection into the device
housing............................ 67
Secure the process con-
nection (inlet)................... 67
Align slot nozzle.............. 68
O-ring, slot nozzle
buffer............................... 68
Position the outlet
process connection......... 69
Tighten hex socket
screws............................. 69
Check for free move-
ment................................ 70
Loosen female socket..... 70
Remove the female
socket.............................. 70
Loosen set screws.......... 71
Release the guide rail .... 71
Rotate guide rail to the
side.................................. 71
Remove switch contact... 71
Device data plate............ 75
Fig. 65:
Fig. 66:
Fig. 67:
Fig. 68:
Fig. 69:
Switch contact rating
plate................................ 75
Switch contact rating
plate with positioning
arrow .............................. 75
Switch contact data
plate................................ 75
Adhesive label, switch
contact with positioning
arrow .............................. 75
Replacement parts
drawing............................ 85
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DWG Module BASICS Flow Monitor
03.09.2018
List of tables
Table 1:
Table 2:
Correct use in nonhazard areas
Correct use of UL Recognized Components in
non-hazard areas........... 13
List of tables
................... 13
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DWG Module BASICS Flow Monitor
9
Overview
Customer service
1 Overview
1.1 Short description
Fig. 1: DWG flow monitor
1 Sight glass with measuring scale
2 Female socket or connection
cable
External measuring devices can be
connected at the socket.
Warranty and guar-
1.2
antee provisions
Warranty and guarantee provisions are
contained in the general terms and
conditions of Meister Strömungstechnik.
1.3 Customer service
For technical support, please contact
our customer service department (for
contact details, see Page 2).
Furthermore, our staff is always interested in receiving new information and
experiences gained from application of
the device, which may be useful in
improving our products.
The flow monitor DWG monitors the
continuous flow of liquids. It is
designed for installation in pipe systems.
A float inside the device is moved by
the medium flowing through it. The
current rate of flow can be read-of
the measuring scale on the sight glass.
The top edge of the float is the read-off
point.
10
f on
DWG Module BASICS Flow Monitor
03.09.2018
2 Safety
Safety
Explanation of symbols
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
conditions and in damage to property
2.1 Explanation of symbols
Safety instructions
Safety instructions in this manual are
marked by symbols. The safety
instructions are preceded by signal
words that indicate the level of danger/
hazard.
.
To prevent accidents or injury to persons as well as damage to property,
always observe the safety instructions
and proceed carefully.
DANGER!
This combination of symbol and
signal word indicates an immediate, dangerous condition that
results in death or serious injury
if it is not avoided.
WARNING!
03.09.2018
This combination of symbol and
signal word indicates a possibly
dangerous condition that might
result in death or serious injury
if it is not avoided.
DWG Module BASICS Flow Monitor
11
Safety
Explanation of symbols
CAUTION!
This combination of symbol and
signal word indicates a possibly
dangerous condition that might
result in minor or slight injury if
it is not avoided.
NOTICE!
This combination of symbol and
signal word indicates a possibly
dangerous condition that might
result in damage to property
and to the environment if it is
not avoided.
Tips and recommendations
Designates step-by-step handling instructions
Designates a state or an
ð
automatic sequence as a
result of a specific operating
step
n Designates randomly ordered enu-
merations and list entries
Ä
“Signs used in these instructions”
on page 12, designates references to
chapters in these instructions
This symbol emphasizes useful
tips and recommendations as
well as information for efficient
and failure-free operation.
Signs used in these instructions
The following signs and highlightings
are used in these instructions to identify handling instructions, the description of results, lists/enumerations, references and other elements:
12
DWG Module BASICS Flow Monitor
03.09.2018
Safety
Correct use in accordance with these instructions
2.2 Correct use in accordance with these instructions
The device has been designed and
constructed solely for the correct use
in accordance with these instructions.
Table 1: Correct use in non-hazard
areas
The flow monitor serves exclusively
to monitor the continuous flow of liquids within a temperature range of
-20 °C to 100 °C (optional: 160 °C)
at a maximum operating pressure of
.
10 bar
Table 2: Correct use of UL Recognized
Components in non-hazard areas
The flow monitor serves exlusively to
monitor the continuous flow of liquids
within a temperature range of -15 °C
to 100 °C at a maximum operating
pressure of 10 bar
Correct use in explosion-hazard
zones
For employment in explosion-hazard
zones, changed conditions apply for
the intended use.
The intended use in explosion-hazard
zones is described in the Operating
Instructions "DWG Module A
.
TEX".
Intended use in explosion-hazard
zones includes the observance of all
specifications in these Operating
Instructions, as well as those for "DWG
Module A
Any additional or different application,
above or beyond the correct use in
accordance with these instructions, is
deemed as incorrect use.
TEX"
WARNING!
Danger due to incorrect use!
Incorrect use of the flow monitor may result in dangerous situations.
– Use the flow monitor only
within the stipulated performance limits
–
Do not subject the flow
monitor to severe temperature fluctuations
– Do not use the flow monitor
with quick-acting valves
– Do not use the flow monitor
with solenoid valves
– Do not subject the flow
monitor to vibrations
– Do not subject the flow
monitor 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
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DWG Module BASICS Flow Monitor
13
Safety
Special precautions
– 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 with sight
glass must be installed in
such a way as to preclude
damage to the sight glass
by outside force. If necessary, install an appropriate
impact protection device
All claims for damages due to incorrect
usage are excluded.
2.3 Special precautions
The following section lists residual
risks that might arise from the device.
To reduce health risks and prevent
dangerous conditions, observe the
safety instructions listed here as well
as the safety instructions in the other
chapters of these operating instructions.
These operating instructions
cannot cover all conceivable
dangers because many dangers arise, not from the device
itself, but from the respective
media flowing through it.
Always observe the appropriate
safety data sheets when using
hazardous media!
DANGER!
Employment of the device in
explosion-hazard zones
requires the observance of
the Operating Instructions for
"DWG Module A
TEX"
including all hazard statements and warnings, therein.
14
DWG Module BASICS Flow Monitor
03.09.2018
Safety
Special precautions > Mechanical hazards
2.3.1 Hazards from electrical current
Electrical current
DANGER!
Danger to life from electrical
current!
There is an immediate risk to
life from electrocution on
touching live parts. Damaged
electrical insulation or components can be extremely dangerous.
– Only qualified electricians
shall work on the electrical
system.
–
If the insulation is damaged, immediately switch
off and have repairs performed.
– Before commencing work
on live parts of the electrical systems and operating equipment, disconnect the equipment and
ensure that it remains disconnected for the duration
of the work. Observe these
5 safety rules when doing
so:
– Isolate (disconnect)
– Secure against
switching back on
– Check for absence of
voltage
– Ground and short
– Cover or cordon off
other live parts in the
vicinity
– Never bridge fuses or put
them out of operation.
Always observe the correct
current ratings when
replacing fuses
– Keep moisture away from
live parts. This can result in
short-circuit
2.3.2 Mechanical hazards
WARNING!
Risk of injury from glass
breakage!
The sight glass in the flow monitor can burst due to excessive
temperature or pressure. There
is a risk of injury from glass
splinters and escaping media.
– Keep within the stipulated
operating limits
–
Wear personal protective
equipment
– Avoid severe temperature
fluctuations
– Avoid pressure surges
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DWG Module BASICS Flow Monitor
15
Safety
Special precautions > Hazards from high or low temperatures
WARNING!
Risk of injury on sharp edges
and pointed corners!
Sharp edges and pointed corners can cause abrasions and
skin cuts.
– Proceed with caution when
working near sharp edges
and pointed corners.
–
If in doubt, wear protective
gloves.
2.3.3 Hazards from high or low temperatures
Hot or cold surfaces
WARNING!
Risk of injury from hot or
cold surfaces!
Surfaces of components may
heat up/cool down dramatically
due to the media flowing
through them. Skin contact with
hot or cold surfaces may cause
severe skin burn or frostbite.
– Always wear temperature-
resistant protective work
clothing and protective
gloves when working near
hot/cold surfaces
–
Before commencing work,
make sure that all surfaces
have been cooled down or
warmed up to ambient temperature
16
DWG Module BASICS Flow Monitor
03.09.2018
Safety
Special precautions > Hazards caused by media
2.3.4 Radiation hazards
Strong magnetic fields
WARNING!
Danger to life from strong
magnetic fields!
Strong magnetic fields may
cause severe injury or even be
fatal, as well as cause considerable damage to property
– Persons with pacemakers
must not be located in the
vicinity of the device. This
could impair the function of
the pacemaker
–
Persons with metal
implants must not be
located in the vicinity of the
device. Implants can heat
up or be attracted magnetically
– Keep ferromagnetic mate-
rials and electromagnets
away from the magnetic
source. These materials
could be attracted and fly
through the room, thereby
injuring or even killing persons. Minimum clearance:
3 m
– Remove and put away
metal objects before maintenance work (jewelry,
watches, writing implements, etc.)
.
– Do not place any electronic
devices within the vicinity of
the magnetic source.
These could be damaged
– Do not place any electronic
storage media, credit
cards, etc. within the
vicinity of the magnetic
source. Data could be
deleted
2.3.5 Hazards caused by media
Hazardous media
WARNING!
Risk of injury from hazardous
media!
If the flow monitor is used for
toxic, corrosive or very hot/cold
media, there is a risk of serious
injury from escaping media.
– Observe details in the
safety data sheet of the
media
–
Comply with the safety,
accident prevention and
environmental protection
regulations appropriate to
the media used
– Wear personal protective
equipment in accordance
with the safety data sheet
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DWG Module BASICS Flow Monitor
17
Safety
Personal safety equipment
2.4 Personnel requirements
WARNING!
Risk of injury due to insufficiently trained and qualified
personnel!
If unqualified personnel work on
the device or are located within
its hazard zone, dangers arise
which may result in serious
injury and considerable
damage to property
– All work must be performed
by qualified personnel only.
– Keep unqualified personnel
away from hazard zones.
Authorized personnel is to be
restricted to those persons who can be
expected to perform their work reliably.
Persons whose ability to respond is
influenced, e.g. by drugs, alcohol or
medication, are not authorized.
Observe the age and occupational regulations at the site when choosing personnel.
The following lists the personnel qualifications for the various areas of
activity:
.
Qualified electrician
Due to specialized training, knowledge
and experience as well as knowledge
of the relevant standards and regulations, the qualified electrician is able to
independently perform work on the
electrical systems as well as to detect
and avoid possible risks and dangers.
Additionally
vide proof of his/her professional qualification that certifies his/her ability to
perform work on electrical systems.
The qualified electrician must fulfill the
requirements contained in the valid
legal accident-prevention regulations.
Qualified personnel
Due to their specialized training,
knowledge and experience as well as
their knowledge of the relevant standards and regulations, qualified personnel are able to independently perform the work assigned to them as well
as to detect and avoid possible risks
and dangers.
, the electrician must pro-
2.5 Personal safety equipment
Personal safety equipment is used to
protect personnel from hazards or dangers that might impair their safety or
health during work.
18
DWG Module BASICS Flow Monitor
03.09.2018
Safety
Protective systems
When performing the various tasks at,
and with the device, personnel must
wear personal safety equipment. Special reference is made of this in the
individual chapters within these Operating Instructions. The following provides a description of the personal
safety equipment:
n Always wear appropriate personal
safety equipment required in the
various chapters of these Operating Instructions before commencing work.
n Comply with the personal safety
equipment instructions posted
within the work area.
Description of personal safety
equipment
As specified in the Safety Data
Sheet of the medium,
protective
equipment must be worn when handling hazardous media. In addition,
the specifications of the system
operator must be followed. If no
protective equipment is specified,
suitable protective gloves and goggles must be worn.
The protective equipment is used to
protect against hazardous media leaks
and hazardous media residue in the
device.
Goggles
The goggles are used to protect the
eyes from flying debris and splashing
fluid.
Protective gloves
Protective gloves protect the hands
from friction, burns, grazing, abrasion,
surface cuts or deeper injuries, as well
as from direct contact with hot or cold
surfaces.
2.6 Protective systems
Integration within an emergencystop concept is required
The device is designed for use as a
part of a machine or system. It does
not have its own controller and does
not have an autonomous emergencystop function.
Before starting up the device, install
the emergency-stop equipment and
incorporate it into the safety chain of
the machine or system.
Connect the emergency-stop equipment so that if there is an interruption
in the power supply or in the activation
of the power supply after an interruption, dangerous conditions are
excluded for persons and valuables.
03.09.2018
The emergency-stop equipment must
always be freely accessible.
DWG Module BASICS Flow Monitor
19
Safety
Environmental protection
2.7 Replacement parts
WARNING!
Risk of injury due to use of
incorrect replacement parts!
Use of incorrect or faulty
replacement parts may result in
dangers to personnel as well as
damages, malfunctions or total
failure.
– Only use original replace-
ment parts from the manufacturer or approved by the
manufacturer
– Always contact the manu-
facturer in case of doubt.
Always purchase replacement parts
from an authorized dealer or directly
from the manufacturer (For contact
details, see Page 2).
The replacement parts list is in the
annex.
.
2.8 Environmental protection
NOTICE!
Risk to the environment due
to improper handling of environmentally hazardous substances!
Serious environmental damage
may result if substances
harmful to the environment are
handled incorrectly
they are disposed of improperly.
– Always observe the instruc-
tions listed below on the
handling and disposal of
substances harmful to the
environment.
– If harmful substances are
released into the environment, take immediate
countermeasures. If there
is doubt, contact the local
authorities, inform them of
the damage and request
information on suitable
countermeasures to be
taken.
, especially if
20
Cleaning fluids
Solvent-based cleaning fluids contain
toxic substances. They must never be
released into the environment and
must be disposed of by a waste management company.
DWG Module BASICS Flow Monitor
03.09.2018
Safety
Responsibility of the owner
Lubricants
Lubricants such as greases and oils
contain toxic substances. They must
never be released into the environment and must be disposed of by a
waste management company
.
2.9 Responsibility of the owner
Owner
The owner is the person who operates
the device himself for business or
commercial purposes or who cedes
such use/application to a third-party
and who, during operation of the
device, has full legal product stewardship for protection of the user, the personnel or third-parties.
Duties of the owner
The device is used in the commercial
sector. The owner of the device is
therefore subject to legal obligations
pertaining to work safety.
In addition to the safety instructions
contained in these Operating Instructions, the safety, accident prevention
and environmental protection regulations applicable to the field of application of the device must be observed.
In particular, this includes:
n The owner must inform himself
regarding the valid health and
safety regulations and must perform a risk assessment to additionally determine the risks
resulting from the special work
conditions arising at the location at
which the device is used, especially in regard to the media used.
He must then implement these
within Operating Instructions for
use of the device.
n For the USA:
The "Occupational Health and
Safety Act" of 1970 stipulates that
it is the duty of the owner to provide a safe workplace. He must
hereby ensure that the device is
operated and maintained compliant to valid commercial, industrial, local, federal and state laws,
standards and regulations.
n For Canada:
The "Canadian Centre for Occupational Health and Safety Act" of
1978 stipulates that all Canadians
have “…a fundamental right to a
healthy and safe working environment.” It is therefore the duty of
the owner to provide a safe workplace. He must ensure that the
device is operated and maintained
compliant to valid commercial,
industrial, local, provincial, territorial and federal laws, standards
and regulations.
n Appropriate to the working condi-
tions and the media used, the
owner must af
fix signs within the
working area that inform the user
of the hazards and dangers
present.
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DWG Module BASICS Flow Monitor
21
Safety
Responsibility of the owner
n During the entire period of use of
the device, the owner must check
periodically to ensure that the
Operating Instructions correspond
to the current state of regulations,
and he must make adjustments as
necessary.
n The owner must clearly regulate
and determine responsibilities for
installation, operation, troubleshooting, maintenance and
cleaning.
n The owner must fit/retrofit suitable
safety equipment within the complete plant/system.
n The owner must ensure that all
staff/personnel have thoroughly
read and understand these
instructions before handling the
device. Additionally, he must train
the personnel at regular intervals
and warn them of dangers.
n The owner must provide the per-
sonnel with the required safety
equipment and must instruct them
that its wear is mandatory.
Additionally, the owner is responsible
for ensuring that the device is always
kept in a technically perfect condition.
The following therefore applies:
n The owner must ensure that the
maintenance intervals described in
these Operating Instructions are
adhered to at all times.
n The owner must ensure that the
device is completely free of all
residual media before disposal.
Remains of corrosive or toxic
materials must be neutralized.
n The owner must implement suit-
able safety measures, appropriate
to the media used.
ferent media have different
n Dif
severities of influence on the
soiling and wear of/to the device.
The owner must set suitable maintenance intervals, depending on
the media flowing through the
device.
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DWG Module BASICS Flow Monitor
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3 Design and function
Design and function
Device description
3.1 Overview
Fig. 2: Front view
1 Process connection (outlet)
2 Device body
3 Sight glass with measuring scale
4 Float
5 Process connection (inlet)
6 Slot nozzle
7 Switch contact and female socket
or switch contact with cable
A float inside the flow monitor is
moved by the flowing medium. A magnetic field is generated by the magnets
inside the float. The position of the
float is detected by the switch contact.
In addition to electrical control by the
Reed-contact (switch contact), the current flow can also be read-of
measuring scale on the sight glass.
Applications for DWG flow monitors
are, for example, cooling circuits. The
device monitors the volume flow of the
cooling media to ensure sufficient
cooling. If the flow drops below the
threshold preset by the operator, the
switch contact (change-over contact)
switches or opens (normally open contact).
f on the
3.2 Device description
DWG flow monitors operate on the
principle of the variable area flow-
. The flow monitor is installed into
meter
a pipe system and measures the flow
rate of the medium flowing through the
pipe system.
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DWG Module BASICS Flow Monitor
23
Design and function
Component description
3.3 Component description
Switch contact
Fig. 3: Switch contact and female
socket
A potential-free Reed-contact is cast
into the switch contact (Fig. 3/1). The
device is supplied with a connector
Fig. 3/2).
Sight glass
Fig. 4: Sight glass
A measuring scale is burnt onto the
sight glass, from which the current rate
of flow can be read-of
f.
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DWG Module BASICS Flow Monitor
03.09.2018
Transport, packaging and storage
4 Transport, packaging and storage
Packaging
4.1 Safety instructions for transport
Improper transport
NOTICE!
The device could be damaged if transported improperly!
Objects to be transported may
fall or overturn if transported
improperly
damage to the device and/or
property.
– Proceed carefully when
– Remove packaging mate-
. This may result in
unloading transported
packages, both on delivery
and when transporting inhouse. Observe the symbols and instructions on the
shipping box
rial just prior to assembly
4.2 Transport inspection
On delivery, make an immediate check
for completeness and check for transport damages.
If there are any visible external transport damages, proceed as follows:
n Do not accept the delivery
n Note the damage in the shipping
documents or on the delivery note
of the transporter and have the
driver confirm by signature
n Initiate a claim for damages
Make a claim for each fault as
soon as it is detected. Claims
for damages can only be
invoked within the valid claim
periods.
4.3 Packaging
Packaging
03.09.2018
The packaging serves to protect the
individual components from transport
damages, corrosion and other damages until they are installed. Do not
discard the packaging and only
remove the device from the shipping
box immediately before installation.
DWG Module BASICS Flow Monitor
25
Transport, packaging and storage
Storage
Handling packaging materials
Dispose of packaging material in
accordance with the valid legal regulations and local ordinances.
NOTICE!
Danger to the environment
due to incorrect disposal!
Packaging is made of valuable
raw materials and can be
reused in many cases or usefully processed and recycled.
Improper disposal of packaging
materials may pose a danger to
the environment.
– Dispose of packaging
material in an environmentally safe manner
–
Comply with the local disposal regulations. If necessary, have the packaging
disposed of by approved
specialists.
4.4 Symbols on the shipping box
Top
Fragile
Designates packages with breakable
or damageable contents.
Handle the package carefully and do
not allow it to fall or be subjected to
jarring or severe vibration.
Storage
4.5
Storing the packages
Store the packages under the following
conditions:
n Do not store in the open
n Store dry and dust-free
n Do not subject to any aggressive
media
n Protect from direct sunlight
void mechanical vibrations and
n A
shocks
n Storage temperature: 0 to 35 °C /
32 °F to 95 °F
n Relative humidity: max. 60 %
n Do not stack
n If storing for longer than 3 months,
regularly check the general condition of all parts as well as of the
packaging.
The arrows indicate the top side of the
package. They must always point
upwards, otherwise the content may
be damaged.
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DWG Module BASICS Flow Monitor
03.09.2018
Storage instructions in addition
to the instructions listed here
may be listed on the packages.
Follow these instructions also.
Transport, packaging and storage
Storage
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