WIKA MH-4 User manual

Operating instructions
Betriebsanleitung
Mode d‘emploi
Manual de instrucciones
EN
DE
FR
ES
Pressure sensor, model MH-4
Drucksensor, Typ MH-4 Seite 18 - 33
Capteur de pression , type MH-4 Page 34 - 49
Sensor de presión, modelo MH-4 Seite 50 - 65
Pressure sensor, model MH-4 Page 2 - 17

2WIKA operating instructions pressure sensor, model MH-4
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© 07/2017 WIKA Alexander Wiegand SE & Co. KG
All rights reserved.
WIKA®is a registered trademark in various countries.
Contents
Contents / 1. General information
1. General information
■Prior to starting any work, read the operating instructions! Keep for later use!
■These operating instructions contain important information on handling the instrument.Working safely requires that
all safety instructions and work instructions are observed.
1. General information 2
2. Short overview 3
3. Safety 4
4. Mounting 6
5. Faults 9
6. Maintenance 10
7. Dismounting, return and disposal 11
8. Specications 12

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WIKA operating instructions pressure sensor, model MH-4
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1. General information / 2. Short overview
■In case of a dierent interpretation of the translated and the English operation instruction, the English wording shall
prevail.
■Further information:
- Internet address: www.wika.de / www.wika.com
- Contact: Tel.: [phone]
[email protected]
- Data sheet: PE 81.63
- Technical information IN 00.14 Tapped holes for process connections
IN 00.50 Electrical mounting
- Declaration of conformity: Online at www.wika.com
2. Short overview
2.1 Overview
Electrical connection
Case, spanner ats
Case
Process connection, spanner ats (depending on case variant)
Process connection, thread






4WIKA operating instructions pressure sensor, model MH-4
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3. Safety
3. Safety
3.1 Explanation of symbols and terms
WARNING!
The signal word indicates a hazard with a medium degree of risk which, if not avoided, may result in
death or serious injury.
CAUTION!
The signal word indicates a hazard with a low degree of risk which, if not avoided, may result in minor
or moderate injury.
Information
The signal word points out useful tips, recommendations and information for ecient and trouble-free
operation.
3.2 Intended use
The model MH-4 is a pressure sensor that is used for pressure measurement in mobile working machines.The
pressure sensor may only be used in such applications as are within its technical performance limits, in particular with
regard to its material resistance limit and permissible temperature and pressure limits.
It is the sole responsibility of the manufacturer or operator of a machine or plant to ensure the suitability of the pressure
sensor, and its media resistance, within the application through proper choice of materials and maintenance cycles.
For performance limits, see chapter 8 “Specications”.
The model MH-4 has been developed for the pressure measurement of non-hazardous uids, liquids and gases
(classication in accordance with Directive 2014/68/EU Article 13, Regulation (EC) No. 1272/2008, or GHS1) which are
mainly used for cooling, lubrication, cleaning or power transmission in industrial machines.
The mounting, dismounting, installation, parameterisation and maintenance of the pressure sensor in industrial
environments absolutely requires suitably skilled personnel in accordance with chapter 3.4 “Personnel qualication”.
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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3. Safety
3.3 Improper use
Any use beyond or dierent to the intended use is considered as improper use. Unauthorised modications to the
instrument are not permissible.
Use in the following apllication areas counts as improper use:
■Safety or emergency shutdown devices
■Hazardous areas
■Abrasive or viscous media and applications with hydrogen and oxygen
■Rail vehicles, medical devices, refrigeration technology and water pumps
■Places of use that are not protected from weather inuences
■Processes with high condensation
3.4 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-specic
regulations, current standards and directives, must be capable of carrying out the work described and independently
recognising potential hazards.
3.5 Labelling, safety marks
Product label
Product number Output signal Coded date of manufacture
Serial number Voltage supply Auxiliary power
Measuring range Pin assignment

    



6WIKA operating instructions pressure sensor, model MH-4
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3. Safety / 4. Mounting
Before mounting and commissioning the instrument, ensure you read the operating instructions!
DC voltage
Do not dispose of with household waste. Ensure a proper disposal in accordance with national
regulations.
4. Mounting
4.1 Mechanical mounting
Only use the pressure sensor if it is in perfect condition with respect to safety.
Prior to commissioning, the pressure sensor must be subjected to a visual inspection.
■Leaking liquid is indicative of damage.
■Obvious damage must be reported immediately.
For information on tapped holes and welding sockets, see technical information IN 00.14 at www.wika.com
1.At the mounting point, screw the pressure sensor in hand-tight.
2.Tighten with a torque spanner using the spanner ats.
■Hexagon at the case, spanner width 22 mm:
- Open-ended spanner: 30 Nm ±5 %
- Socket wrench: 50 Nm ±5 %
■Optional hexagon at the process connection, spanner width 27 mm:
- Open-ended spanner: 50 Nm ±5 %
- Socket wrench: 50 Nm ±5 %
The correct torque depends on the dimensions of the connection thread and the sealing used (form/material).

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WIKA operating instructions pressure sensor, model MH-4
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4. Mounting
Correct use of the open-ended spanner

8WIKA operating instructions pressure sensor, model MH-4
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4. Mounting
Socket wrench suitability
Hexagon (SW 22) integrated into case
≈35
[1.38]
⬡22
Additional hexagon (SW 27) above the process connection
≈55
[2.17]
⬡27
4.2 Electrical mounting
Voltage supply
→For auxiliary power, see product label
→For further details on electrical mounting, see IN 00.50
For instruments without UL, CSA or cURus approval:
This equipment is intended for operation with low voltages, which are separated from the AC 230 V (50 Hz) mains
voltage or voltages greater than AC 50 V or DC 120 V for dry environments. A connection to an SELV circuit is
recommended, or alternatively to circuits with a dierent protective measure in accordance with IEC 60364-4-41
installation standard.
ForinstrumentswithNorthAmericancerticationperUL/CSAIEC61010-1:
The supply for the pressure sensor must be made via a limited-energy circuit in accordance with section 9.4 of
UL/EN/IEC 61010-1 or LPS in accordance with UL/EN/IEC 62368-1 or UL/EN/IEC 60950-1 or Class 2 in accordance

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4. Mounting / 5. Faults
with UL1310/UL1585 (NEC or CEC). The voltage supply must be suitable for operation above 2,000 m should the
pressure sensor be used at this altitude.
Shielding and grounding
Include the pressure sensor in the equipotential bonding via the process connection or connect it to ground (earth).
Pin assignment
→For pin assignments, see product label
5. 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 7.2 “Return”.
For contact details, see chapter 1 “General information” or the back page of the operating instructions.
In the event of any faults, rst check whether the pressure sensor is mounted correctly, mechanically and electrically.
Faults Causes Measures
Plastic has faded UV irradiation 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

10 WIKA operating instructions pressure sensor, model MH-4
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5. Faults / 6. Maintenance
Faults Causes Measures
No/wrong output signal Wiring error Rectify the wiring
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.
Sealing/sealing face damaged or soiled,
sealing does not have a tight t, threads
jammed
Clean the sealing/sealing face, replace sealing
if applicable
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 temperature
Instrument not grounded Ground the instrument
Strongly uctuating pressure of the process
medium
Damping; consulting by the manufacturer
Deviating zero point signal Operating temperature too high/low Lower/increase the temperature
Other mounting position Adjust the zero point
Overload safety exceeded Reduce the pressure
6. Maintenance
6.1 Maintenance
This pressure sensor is maintenance-free.
Repairs must only be carried out by the manufacturer.
6.2 Cleaning
Only use commercially available and solvent-free cleaning agents.

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WIKA operating instructions pressure sensor, model MH-4
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7. Dismounting, return and disposal
7. Dismounting, return and disposal
7.1 Dismounting
WARNING!
Hazardous media
▶Should a failure occur, aggressive media with extremely high temperature and under high pressure
or vacuum may be present at the instrument.
▶Depressurise and deenergise the pressure sensor before dismounting it.
7.2 Return
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 persons, the environment and
equipment.
▶With hazardous substances, enclose the material safety data sheet for the corresponding medium.
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.
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.
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-specic waste disposal regulations.
Do not dispose of with household waste. Ensure a proper disposal in accordance with national
regulations.

12 WIKA operating instructions pressure sensor, model MH-4
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8. Specifications
Depending on the selected instrument version (e.g. sealings), the specication may deviate from the specications
listed here. The specications in the order documentation are denitive.
For further specications, see WIKA data sheet PE 86.63.
Specifications
Measuring range →See product label
Maximum working pressure →Corresponds to the upper measuring range value / measuring range full scale value
Overpressure limit per IEC 62828-1 The overpressure limit is based on the measuring range. Depending on the selected
process connection and sealing, restrictions in overpressure limit can result.
Overpressure limit Measuring ranges ≤ 400 bar [≤ 5,000 psi] 3 times
Measuring range 600 bar [8,000 psi, 10,000 psi] 2 times
Measuring range 1,000 bar 1.5 times
Max. measured error per IEC 6282-1 1 % of span
Total probable error → see diagram “Total probable error (% of span)”
Vacuum resistance Yes
Output signal →see product label
Auxiliary power →see product label
Current supply →see product label
Dynamic behaviour Pressure Temperature
Settling time per IEC 62828-1 ≤ 1 ms ≤ 10 min
Pin assignment →see product label
Short-circuit resistance S+ vs. U-
Reverse polarity protection U+ vs. U-
Insulation voltage DC 500 V (DC 850 V optional)
Material (wetted) Stainless steel 304L, PH grade steel
8.Specications

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WIKA operating instructions pressure sensor, model MH-4
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Specifications
Medium temperature limit -40 ... +125 °C [-40 ... +257 °F]
Ambient temperature limit -40 ... +125 °C [-40 ... +257 °F]
Storage temperature limit -40 ... +70 °C [-40 ... +158 °F]
Service life > 100 million load cycles
Total probable error
Measuringranges≥40...≤1,000bar:
Measuring ranges ≥ 160 bar
Measuring ranges ≥ 40 ... < 160 bar
Total probable error (% of span)
Temperature range (°C)
8.Specications

14 WIKA operating instructions pressure sensor, model MH-4
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Measuringranges≥6...<40bar:
Measuring ranges Temperature limit
20 °C [68 °F] 50 °C [122 °F] 80 °C [176 °F]
0 … 6 bar ≤ ±1,7 % ≤ ±3,4 % ≤ ±5,8 %
0 … 10 bar ≤ ±1,3 % ≤ ±2,3 % ≤ ±3,8 %
0 … 16 bar ≤ ±1,0 % ≤ ±1,6 % ≤ ±2,7 %
0 … 25 bar ≤ ±1,0 % ≤ ±1,3 % ≤ ±2,1 %
8.Specications

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WIKA operating instructions pressure sensor, model MH-4
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8.Specications
Deutsch connector DT04-3P, 3-pin
Weight: approx. 80 g [0.18 lbs]
Circular connector M12 x 1, code A, 4-pin
Weight: approx. 80 g [0.18 lbs]
Deutsch connector DT04-4P, 4-pin
≈50,3
[1.98]
19,8 [0.78]
≈29,5
[1.161]
⌀26,5
[1.043]
⬡22
⬡27
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
Deutsch connector DT04-2P, 2-pin
19,8 [0.78]
≈29,5
[1.161]
≈50,3
[1.98]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
Dimensions in mm [in]
M12 x 1
≈42,5
[1.673]
12 [0.47]
≈21,7
[0.854]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
⌀26,5
[1.043]
⬡22
⬡27
≈50,1
[1.972]
19,6 [0.772]
≈29,2
[1.15]
14 [0.55]
G 1/4 A
ISO 1179-2

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Dimensions in mm [in]
AMP Superseal connector 1.5 series, 3-pin
Weight: approx. 80 g [0.18 lbs]
Delphi connector Metri-Pack series 150, 3-pin
18,5 [0.728]
≈49
[1.93]
≈28,2
[1.11]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
AMP Micro Quadlok System connector, code A, 3-pin
≈47,6
[1.874]
17,1 [0.673]
≈26,8
[1.055]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
AMP Seal 16 connector, cone, code A, 3-pin
≈47,9
[1.886]
17,4 [0.685]
≈27,1
[1.067]
⌀26,5
[1.043]
⬡22
⬡27
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
8.Specications
≈48,4
[1.906]
17,9 [0.705]
≈27,6
[1.087]
⌀26,5
[1.043]
⬡22
⬡27
14 [0.55]
G 1/4 A
ISO 1179-2

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WIKA operating instructions pressure sensor, model MH-4
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Dimensions in mm [in]
VW connector, code I, 4-pin, 2 rows
≈51,1
[2.012]
20,6 [0.811]
≈30,2
[1.189]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
AMP Econoseal J Mark II series connector, 3-pin
≈46,7
[1.839]
16,2 [0.638]
≈25,9
[1.02]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
Additional hexagon at the process connection (SW 27)
⬡22
⬡27
Weight: approx. 80 g [0.18 lbs]
Cable outlet, IP6K9K, 2- or 3-wire
⌀20
[0.79]
L
≈39,6
[1.559]
≈49,2
[1.937]
≈70
[2.76]
⌀26,5
[1.043]
⬡22
14 [0.55]
G 1/4 A
ISO 1179-2
Weight: approx. 80 g [0.18 lbs]
8.Specications

18 WIKA-Betriebsanleitung Drucksensor, Typ MH-4
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© 07/2017 WIKA Alexander Wiegand SE & Co. KG
Alle Rechte vorbehalten.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
Inhalt
Inhalt / 1. Allgemeines
1. Allgemeines
■Vor Beginn aller Arbeiten Betriebsanleitung lesen! Zum späteren Gebrauch aufbewahren!
■Diese Betriebsanleitung gibt wichtige Hinweise zum Umgang mit dem Gerät. Voraussetzung für sicheres Arbeiten
ist die Einhaltung aller angegebenen Sicherheitshinweise und Handlungsanweisungen.
1. Allgemeines 18
2. Kurzübersicht 19
3. Sicherheit 20
4. Montage 22
5. Störungen 25
6. Wartung 26
7. Demontage, Rücksendung und Entsorgung 27
8. Technische Daten 28

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WIKA-Betriebsanleitung Drucksensor, Typ MH-4
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1. Allgemeines / 2. Kurzübersicht
■Bei unterschiedlicher Auslegung der übersetzten und der englischen Betriebsanleitung ist der englische Wortlaut
maßgebend.
■Weitere Informationen:
- Internet-Adresse: www.wika.de / www.wika.com
- Kontakt: Tél : [phone]
[email protected]
- Datenblatt: PE 81.63
- Technische Informationen IN 00.14 Einschraublöcher für Prozessanschlüsse
IN 00.50 Elektrische Montage
- Konformitätserklärung: Online unter www.wika.de
2. Kurzübersicht
2.1 Übersicht
Elektrischer Anschluss
Gehäuse; Schlüsseläche
Gehäuse
Prozessanschluss, Schlüsseläche (je nach Gehäuse-Ausführung)
Prozessanschluss, Gewinde






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3. Sicherheit
3. Sicherheit
3.1 Symbol- und Begriffserklärung
WARNUNG!
Das Signalwort bezeichnet eine Gefährdung mit einem mittleren Risikograd, die, wenn sie nicht
vermieden wird, den Tod oder eine schwere Verletzung zur Folge haben kann.
VORSICHT!
Das Signalwort bezeichnet eine Gefährdung mit einem niedrigen Risikograd, die, wenn sie nicht
vermieden wird, eine geringfügige oder mäßige Verletzung zur Folge haben kann.
Information
Das Signalwort hebt nützliche Tipps und Empfehlungen sowie Informationen für einen ezienten und
störungsfreien Betrieb hervor.
3.2 Bestimmungsgemäße Verwendung
Der Typ MH-4 ist ein Drucksensor, der zur Druckmessung in mobilen Arbeitsmaschinen verwendet wird.
Der Drucksensor darf nur in solchen Anwendungen verwendet werden, die innerhalb seiner technischen
Leistungsgrenzen, insbesondere hinsichtlich dessen Materialbeständigkeitsgrenze sowie zulässigen Temperatur- und
Druckgrenzwerten liegen.
Es obliegt allein der Verantwortung des Herstellers bzw. Betreibers einer Maschine oder Anlage, die Eignung des
Drucksensors und dessen Messstobeständigkeit in der Anwendung durch korrekte Materialwahl und Wartungszyklen
sicherzustellen. Leistungsgrenzen siehe Kapitel 8 „Technische Daten“.
Der Typ MH-4 wurde für die Druckmessung nicht gefährlicher Fluide, Flüssigkeiten und Gase entwickelt (Einstufung
gemäß Richtlinie 2014/68/EU Artikel 13, Verordnung (EG) Nr. 1272/2008, bzw. GHS1)), die v. a. in der Kühlung,
Schmierung, Reinigung oder Kraftübertragung in industriellen Maschinen eingesetzt werden.
Die Montage, Demontage, Installation, Parametrierung und Wartung des Drucksensors in industrieller Umgebung
erfordert unbedingt geeignetes Fachpersonal gemäß Kapitel 3.4 „Personalqualikation“.
Das Gerät ist ausschließlich für den hier beschriebenen bestimmungsgemäßen Verwendungszweck konzipiert und
konstruiert und darf nur dementsprechend verwendet werden.
Ansprüche jeglicher Art aufgrund von nicht bestimmungsgemäßer Verwendung sind ausgeschlossen.