WIKA MH-3 User manual

Operating instructions
Betriebsanleitung
EN
DE
OEM-Drucksensor, Typ MH-3
OEM pressure sensor, model MH-3
Examples / Beispiele

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14136172.02 03/2017 EN/DE
WIKA operating instructions OEM pressure sensor, model MH-3
EN
DE
© 08/2015 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA®is a registered trademark in various countries.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Betriebsanleitung Typ MH-3 Seite 19 - 35
Operating instructions model MH-3 Page 3 - 18

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WIKA Operating instructions OEM pressure sensor, model MH-3
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Contents
1. General information 4
2. Design and function 5
3. Safety 6
4. Transport, packaging and storage 8
5. Commissioning, operation 9
6. Faults 12
7. Maintenance and cleaning 14
8. Dismounting, return and disposal 15
9. Specifications 16
Declarations of conformity can be found online at www.wika.com
Contents

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WIKA Operating instructions OEM pressure sensor, model MH-3
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1. General information
1. General information
■
The instrument described in the operating instructions has been designed and
manufactured using state-of-the-art technology. All components are subject to
stringent quality and environmental criteria during production. Our management
systems are certified to ISO 9001 and ISO 14001.
■
These operating instructions contain important information on handling the
instrument. Working safely requires that all safety instructions and work instructions
are observed.
■
Observe the relevant local accident prevention regulations and general safety
regulations for the instrument's range of use.
■
The operating instructions are part of the product and must be kept in the immediate
vicinity of the instrument and readily accessible to skilled personnel at any time. Pass
the operating instructions onto the next operator or owner of the instrument.
■
Skilled personnel must have carefully read and understood the operating instructions
prior to beginning any work.
■
The general terms and conditions contained in the sales documentation shall apply.
■
Subject to technical modifications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: PE 81.59
- Application consultant: Tel.: [phone]
Fax: [phone]
[email protected]

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WIKA Operating instructions OEM pressure sensor, model MH-3
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



2. Design and function
2. Design and function
2.1 Overview
Electrical connection (depending on version)
Case
Process connection, spanner flats
Process connection, thread
2.2 Signal clamping
The output signal of a pressure sensor can be above the nominal maximum signal
value, if no signal clamping has been set. Likewise, the output signal can also be below
the nominal minimum signal value.This undefined condition can cause an error in
the machine (software) of the customer. Signal clamping limits the output signal to a
minimum or maximum value which is to be defined by the customer.
2.3 Diagnostic function
By means of the output signal, fault conditions can be detected and evaluated via
software.Thus it is possible to differentiate between permanent and temporary faults.
2.4 CDS system
All process connections are available with the CDS system.The diameter of the
pressure port is reduced in order to counteract pressure spikes and cavitation.
2.5 Scope of delivery
Pressure sensor
Cross-check scope of delivery with delivery note.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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3. Safety
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious
injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light
injuries or damage to equipment or the environment, if not avoided.
Information
... points out useful tips, recommendations and information for efficient
and trouble-free operation.
3.2 Intended use
The pressure sensor is used for measuring pressure.The measured pressure is output
as an electrical signal.
The pressure sensor is intended for use in mobile working machines.
Only use the pressure sensor in applications that lie within its technical performance
limits (e.g. max. ambient temperature, material compatibility, ...).
→ Performance limits see chapter 9 “Specifications”.
The instrument has been designed and built solely for the intended use described here,
and may only be used accordingly.
The manufacturer shall not be liable for claims of any type based on operation contrary
to the intended use.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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3. Safety
3.3 Personnel qualification
Skilled personnel
Skilled personnel, authorised by the operator, are understood to be personnel who,
based on their technical training, knowledge of measurement and control technology and
on their experience and knowledge of country-specific regulations, current standards
and directives, are capable of carrying out the work described and independently
recognising potential hazards.
3.4 Personal protective equipment
The personal protective equipment is designed to protect the skilled personnel from
hazards that could impair their safety or health during work. When carrying out the
various tasks on and with the instrument, the skilled personnel must wear personal
protective equipment.
Follow the instructions displayed in the work area regarding personal protective
equipment!
The requisite personal protective equipment must be provided by the operating company.
3.5 Labelling, safety marks
Product label
wika.com
MH-3




Product no.
Serial no.
Coded manufacturing date
Measuring range

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4. Transport, packaging and storage
4. Transport, packaging and storage
4.1 Transport
Check the pressure sensor for any damage that may have been caused during transpor-
tation.
Obvious damage must be reported immediately.
4.2 Packaging and storage
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change
in installation site, sending for repair).
Permissible conditions at the place of storage:
■
Storage temperature: -40 ... +100 °C
■
Humidity: 67 % relative humidity (no condensation)
Avoid exposure to the following factors:
■
Direct sunlight or proximity to hot objects
■
Mechanical vibration, mechanical shock (putting it down hard)
■
Soot, vapour, dust and corrosive gases
■
Hazardous environments, flammable atmospheres
Store the instrument in its original packaging in a location that fulfils the conditions
listed above. If the original packaging is not available, pack and store the instrument as
described below:
1. Wrap the instrument in an antistatic plastic film.
2. Place the instrument, along with the shock-absorbent material, in the packaging.
3. If stored for a prolonged period of time (more than 30 days), place a bag containing a
desiccant inside the packaging.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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5. Commissioning, operation
5. Commissioning, operation
5.1 Mounting the instrument
Requirements for mounting point
The mounting point must meet the following conditions:
■
Sufficient space for a safe electrical installation.
■
Permissible ambient and medium temperatures remain within the performance limits.
Consider possible restrictions on the ambient temperature range caused by mating
connector used.
→ Performance limits see chapter 9 “Specifications”
Sealing variants
Parallel threads
Seal the sealing face with fl at gaskets, sealing
rings or WIKA profi le sealings.
per EN 837 per DIN 3852-E


Tapered threads
Wrap threads with sealing material, e.g. PTFE
tape.
NPT, R and PT
Mounting the instrument
The max. torque depends on the mounting point (e.g. material and
shape). If you have any questions, please contact our application consul-
tant.
→ For contact details, please see chapter 1 “General information” or the
back page of the operating instructions.
1. Seal the sealing face (→ see “Sealing variants”).
2
.
At the mounting point, screw the pressure sensor in hand-tight.
3
.
Tighten with a torque spanner using the spanner flats.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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5.2 Connecting the instrument to the electric system
Requirements for voltage supply
The power supply depends on the output signal.
Output signal Power supply
4 ... 20 mA DC 10 ...36 V
DC 0 ... 10 V DC 14 ... 36 V
DC 1 ... 5 V DC 8 ... 36 V
DC 1 ... 6 V DC 9 ... 36 V
DC 0.5 ... 4.5 V DC 4.5 ... 5.5 V
Requirements for electrical connection
■
Cable diameter matches the cable bushing of the mating connector.
■
Cable gland and seals of the mating connector are correctly seated.
■
With cable outlets, no humidity can ingress at the cable end.
Requirement for shielding and grounding
The pressure sensor must be shielded and grounded in accordance with the grounding
concept of the plant.
In accordance with EN 61326-1, in case of outdoor installations, faults caused by surge
voltages must be considered.To protect the instrument, it must be connected using
a shielded cable.The shield of the cable must be connected on at least one side to
ground or a suitable reference potential. Optionally, a suitable external measure can be
taken to ensure protection against surge voltages.
Connecting the instrument
1. Assemble the mating connector or cable outlet.
→ See “Pin assignments”
2
.
Establish the plug connection.
5. Commissioning, operation

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WIKA Operating instructions OEM pressure sensor, model MH-3
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Pin assignments
Circular connector M12 x 1 (4-pin) 2-wire 3-wire
43
12
U+1 1
U-3 3
S+- 4
Metri-Pack series 150 (3-pin) 2-wire 3-wire
U+B B
U-A A
S+- C
AMP Superseal 1.5 (3-pin) 2-wire 3-wire
U+3 3
U-1 1
S+- 2
Deutsch DT04-3P (3-pin) 2-wire 3-wire
U+A A
U-B B
S+- C
Cable outlet 2-wire 3-wire
U+brown brown
U-green green
S+- white
Wire cross-section 0.75 mm2 (with end splices)
Cable diameter 6.6 mm
Cable length 0.5 m or 2 m
Legend
U+Positive power supply terminal
U-Negative power supply terminal
S+Analogue output
5. Commissioning, operation

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WIKA Operating instructions OEM pressure sensor, model MH-3
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6. Faults
6. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the
pressure sensor must be taken out of operation immediately.
▶
Ensure that pressure or signal is no longer present and protect against
accidental commissioning.
▶
Contact the manufacturer.
▶
If a return is needed, please follow the instructions given in chapter 8.2
“Return”.
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable
or toxic substances), harmful media (e.g. corrosive, toxic, carcinogenic,
radioactive), and also with refrigeration plants and compressors, there
is a danger of physical injuries and damage to property and the environ-
ment.
▶
Should a failure occur, aggressive media with extremely high tempe-
rature and under high pressure or vacuum may be present at the
instrument.
▶
For these media, in addition to all standard regulations, the appropriate
existing codes or regulations must also be followed.
▶
Wear the requisite protective equipment (see chapter 3.4 “Personal
protective equipment”).
For contact details, please see chapter 1 “General information” or the
back page of the operating instructions.
Faults Causes Measures
Plastic has faded UV radiation No measures required
Discolouration is harmless
No output signal Cable break Check the continuity, and if
necessary exchange the cable
No/wrong power supply Rectify the power supply
No/wrong output signal Wiring error Rectify the wiring

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WIKA Operating instructions OEM pressure sensor, model MH-3
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Faults Causes Measures
Constant output signal upon
change in pressure
Mechanical overload caused
by overpressure
Replace instrument; if it
fails repeatedly, contact the
manufacturer.
Signal span too small/drops Mechanical overload caused
by overpressure
Replace instrument; if it
fails repeatedly, contact the
manufacturer.
Diaphragm damaged, e.g.
due to impacts, abrasive/
aggressive medium; corrosi-
on at diaphragm or process
connection; transmission
medium missing
Replace instrument; if it
fails repeatedly, contact the
manufacturer.
Sealing/sealing face damaged
or soiled, sealing does not
have a tight fit, threads
jammed
Clean the sealing/sealing
face, replace sealing if appli-
cable
Signal span varies/inaccurate EMC interference sources
in the environment; e.g.
frequency converter
Shield instrument; cable
shield; remove source of
interference
Operating temperature too
high/low
Lower/increase the tempe-
rature
Instrument not grounded Ground the instrument
Strongly fluctuating pressure
of the process medium
Damping; consulting by the
manufacturer
Deviating zero point signal Operating temperature too
high/low
Lower/increase the tempe-
rature
Other mounting position Adjust the zero point
Overpressure limit exceeded Reduce the pressure
If complaint is unjustified, we will charge you the complaint processing fees.
6. Faults

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WIKA Operating instructions OEM pressure sensor, model MH-3
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7. Maintenance and cleaning
7. Maintenance and cleaning
7.1 Maintenance
This pressure sensor is maintenance-free.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
Unsuitable cleaning agents
Cleaning with unsuitable cleaning agents may damage the instrument and
the product label.
▶
Do not use any aggressive cleaning agents.
▶
Do not use any hard or pointed objects.
▶
Do not use any abrasive cloths or sponges.
Suitable cleaning agents
■
Water
■
Conventional dishwashing detergent
Cleaning the instrument
▶
Wipe the instrument surface using a soft, damp cloth.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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8. Dismounting, return and disposal
8. Dismounting, return and disposal
8.1 Dismounting
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable
or toxic substances), harmful media (e.g. corrosive, toxic, carcinogenic,
radioactive), and also with refrigeration plants and compressors, there is a
danger of physical injuries and damage to property and the environment.
▶
Should a failure occur, aggressive media with extremely high tempe-
rature and under high pressure or vacuum may be present at the
instrument.
▶
Wear the requisite protective equipment (see chapter 3.4 “Personal
protective equipment”).
Dismounting the instrument
1. Disconnect the instrument from the mains.
2
.
Disconnect the electrical connection.
3
.
Unscrew the instrument with a spanner using the spanner flats.
8.2 Return
Strictly observe the following when shipping the instrument:
All instruments delivered to WIKA must be free from any kind of hazardous substances
(acids, bases, solutions, etc.) and must therefore be cleaned before being returned.
WARNING!
Physical injuries and damage to property and the environment
through residual media
Residual media in the dismounted instrument can result in a risk to
personnel, the environment and equipment.
▶
With hazardous substances, include the material safety data sheet for
the corresponding medium.
▶
Clean the instrument, see chapter 7.2 “Cleaning”.
When returning the instrument, use the original packaging or a suitable transport
packaging.
Information on returns can be found under the heading “Service” on our
local website.

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WIKA Operating instructions OEM pressure sensor, model MH-3
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8.3 Disposal
Incorrect disposal can put the environment at risk.
Dispose of instrument components and packaging materials in an environmentally
compatible way and in accordance with the country-specific waste disposal regulations.
9. Specifications
9.1 Specifications
Specifications Model MH-3
Measuring range see order documentation
Overload safety 2 times
Output signal see order documentation
Load 4 ... 20 mA ≤ (power supply - 10 V) / 0.02 A
DC 0 ... 10 V > 5 kΩ
DC 1 ... 5 V > 2.5 kΩ
DC 1 ... 6 V > 5 kΩ
DC 0.5 ... 4.5 V > 4,5 kΩ
Power supply
(depending on output
signal)
4 ... 20 mA DC 10 ...36 V
DC 0 ... 10 V DC 14 ... 36 V
DC 1 ... 5 V DC 8 ... 36 V
DC 1 ... 6 V DC 9 ... 36 V
DC 0.5 ... 4.5 V DC 4.5 ... 5.5 V
Current consumption
(depending on output
signal)
4 ... 20 mA < 30 mA
DC 0 ... 10 V < 10 mA
DC 1 ... 5 V < 10 mA
DC 1 ... 6 V < 10 mA
DC 0.5 ... 4.5 V < 10 mA
Ingress protection 1)
Circular connector M12 x 1 (4-pin) IP67
Metri Pack series 150 (3-pin) IP67
AMP Superseal 1.5 (3-pin) IP67
Deutsch DT04-3P (3-pin) IP67
Cable outlet IP69K
Vibration resistance 20 g (per IEC 60068-2-6, under resonance)
8. Dismounting, return ... / 9. Specifications

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WIKA Operating instructions OEM pressure sensor, model MH-3
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Specifications Model MH-3
Shock resistance 500 g (per IEC 60068-2-27, mechanical)
Permissible temperature
ranges
Ambient -40 ... +100 °C
Medium -40 ... +125 °C
Storage -40 ... +100 °C
Materials Wetted parts Stainless steel
Non-wetted parts Highly resistant glass-fibre
reinforced plastic (PBT)
Pin assignment see chapter 5.2 “Connecting the instrument to the electric system”
CE conformity Pressure equipment directive
EMC directive, EN 61326 emission (group 1, class B) and
interference immunity (industrial application)
1) The stated ingress protection only applies when plugged in using mating connectors that have the appropriate
ingress protection.
9.2 Sealings and temperature ranges
Specifications Sealings
Threas size FKM/FPM NBR
G ¼ A DIN 3852-E -40 ... +125 °C -30 ... +100 °C
M14 x 1,5 ISO 6149-2 -20 ... +125 °C -30 ... +120 °C
7/16-20 UNF-2A
(O-ring BOSS)
-20 ... +125 °C -40 ... +100 °C
For further specifications see WIKA data sheet PE 81.59 and the order documentation.
9. Specifications

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WIKA Operating instructions OEM pressure sensor, model MH-3
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WIKA Betriebsanleitung OEM-Drucksensor, Typ MH-3
DE
14136172.02 03/2017 EN/DE
Inhalt
1. Allgemeines 20
2. Aufbau und Funktion 21
3. Sicherheit 22
4. Transport, Verpackung und Lagerung 24
5. Inbetriebnahme, Betrieb 25
6. Störungen 28
7. Wartung und Reinigung 30
8. Demontage, Rücksendung und Entsorgung 31
9. Technische Daten 32
Konformitätserklärungen finden Sie online unter www.wika.de
Inhalt

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WIKA Betriebsanleitung OEM-Drucksensor, Typ MH-3
DE
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1. Allgemeines
1. Allgemeines
■
Das in der Betriebsanleitung beschriebene Gerät wird nach dem aktuellen Stand der
Technik konstruiert und gefertigt. Alle Komponenten unterliegen während der Ferti-
gung strengen Qualitäts- und Umweltkriterien. Unsere Managementsysteme sind
nach ISO 9001 und ISO 14001 zertifiziert.
■
Diese Betriebsanleitung gibt wichtige Hinweise zum Umgang mit dem Gerät.Voraus-
setzung für sicheres Arbeiten ist die Einhaltung aller angegebenen Sicherheitshin-
weise und Handlungsanweisungen.
■
Die für den Einsatzbereich des Gerätes geltenden örtlichen Unfallverhütungsvor-
schriften und allgemeinen Sicherheitsbestimmungen einhalten.
■
Die Betriebsanleitung ist Produktbestandteil und muss in unmittelbarer Nähe des
Gerätes für das Fachpersonal jederzeit zugänglich aufbewahrt werden. Betriebsan-
leitung an nachfolgende Benutzer oder Besitzer des Gerätes weitergeben.
■
Das Fachpersonal muss die Betriebsanleitung vor Beginn aller Arbeiten sorgfältig
durchgelesen und verstanden haben.
■
Es gelten die allgemeinen Geschäftsbedingungen in den Verkaufsunterlagen.
■
Technische Änderungen vorbehalten.
■
Weitere Informationen:
- Internet-Adresse: www.wika.de / www.wika.com
- Zugehöriges Datenblatt: PE 81.59
- Anwendungsberater: Tel.: [phone]
Fax: [phone]
[email protected]