WIKA MH-3 User manual
Operating instructions
Betriebsanleitung
EN
DE
OEM-Drucksensor, Typ MH-3
OEM pressure sensor, model MH-3
Examples / Beispiele
2
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
14136172.02 03/2017 EN/DE
EN
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
14136172.02 03/2017 EN/DE
EN
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.: +49 9372 132-8976
Fax: +49 9372 132-8008976
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WIKA Operating instructions OEM pressure sensor, model MH-3
14136172.02 03/2017 EN/DE
EN
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
14136172.02 03/2017 EN/DE
EN
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
14136172.02 03/2017 EN/DE
EN
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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WIKA Operating instructions OEM pressure sensor, model MH-3
14136172.02 03/2017 EN/DE
EN
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
14136172.02 03/2017 EN/DE
EN
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
14136172.02 03/2017 EN/DE
EN
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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