Pfeiffer Vacuum IKR 270 User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
IKR 270
Cold cathode gauge

Dear Customer,
Thank you for choosing a Pfeiffer Vacuum product. Your new gauge is designed to support
you in your individual application with maximum performance and without malfunctions. The
name Pfeiffer Vacuum stands for high-quality vacuum technology, a comprehensive and
complete range of top-quality products and first-class service. From this extensive, practical
experience we have gained a large volume of information that can contribute to efficient
deployment and to your personal safety.
In the knowledge that our product must avoid consuming work output, we trust that our
product can offer you a solution that supports you in the effective and trouble-free
implementation of your individual application.
Please read these operating instructions before putting your product into operation for the
first time. If you have any questions or suggestions, please feel free to contact info@pfeiffer-
vacuum.de.
Further operating instructions from Pfeiffer Vacuum can be found in the Download Center on
our website.
Disclaimer of liability
These operating instructions describe all models and variants of your product. Note that your
product may not be equipped with all features described in this document. Pfeiffer Vacuum
constantly adapts its products to the latest state of the art without prior notice. Please take
into account that online operating instructions can deviate from the printed operating
instructions supplied with your product.
Furthermore, Pfeiffer Vacuum assumes no responsibility or liability for damage resulting from
the use of the product that contradicts its proper use or is explicitly defined as foreseeable
misuse.
Copyright
This document is the intellectual property of Pfeiffer Vacuum and all contents of this
document are protected by copyright. They may not be copied, altered, reproduced or
published without the prior written permission of Pfeiffer Vacuum.
We reserve the right to make changes to the technical data and information in this document.
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Table of contents
1 About this manual 5
1.1 Validity 5
1.1.1 Applicable documents 5
1.1.2 Variants 5
1.2 Target group 5
1.3 Conventions 6
1.3.1 Instructions in the text 6
1.3.2 Pictographs 6
1.3.3 Stickers on the product 6
1.3.4 Abbreviations 6
1.4 Trademark proof 7
2 Safety 8
2.1 General safety information 8
2.2 Safety instructions 8
2.3 Safety precautions 10
2.4 Proper use 10
2.5 Foreseeable improper use 11
2.6 Responsibilities and warranty 11
2.7 Owner requirements 11
2.8 Personnel qualification 11
2.8.1 Ensuring personnel qualification 12
2.8.2 Personnel qualification for maintenance and repair 12
2.8.3 Advanced training with Pfeiffer Vacuum 12
2.9 Operator requirements 12
3 Product description 13
3.1 Function 13
3.2 Status display 13
3.3 Identifying the product 13
3.4 Scope of delivery 13
4 Transport and storage 15
4.1 Transporting the product 15
4.2 Storing the product 15
5 Installation 16
5.1 Establishing the vacuum connection 16
5.2 Magnetic unit 17
5.3 Establishing the electric connection 18
6 Operation 21
6.1 Converting measuring signal and pressure 21
6.2 Ascertaining effective pressure with calibration factors 22
6.3 Ignition delay 24
6.4 Pollution 24
7 Disassembly 25
8 Maintenance 27
8.1 Maintaining the gauge 27
8.2 Disassembling the gauge 27
8.3 Cleaning of components 30
8.4 Assembling the gauge 31
9 Malfunctions 34
10 Shipping 35
Table of contents
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11 Recycling and disposal 36
11.1 General disposal information 36
11.2 Dispose of gauges 36
12 Service solutions by Pfeiffer Vacuum 37
13 Spare parts 39
14 Accessories 40
14.1 Accessory information 40
14.2 Ordering accessories 40
15 Technical data and dimensions 41
15.1 General 41
15.2 Technical data 41
15.3 Dimensions 43
ETL certification 44
Declaration of conformity 45
Table of contents
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1 About this manual
IMPORTANT
Read carefully before use.
Keep the manual for future consultation.
1.1 Validity
This document describes the function of the products listed in the following and provides the most im-
portant information for safe use. The description is written in accordance with the valid directives. The
information in this document refers to the current development status of the products. The document
retains its validity assuming that the customer does not make any changes to the product.
1.1.1 Applicable documents
Designation Document
Brief instructions for "Cold cathode gauge"
IKR 270
BG 5115
Operating instructions "Total pressure measuring and control unit"
TPG 361 | TPG 362
BG 5500
Operating instructions "Total pressure measuring and control unit"
TPG 366
BG 5501
Declaration of conformity (Component of these instruc-
tions)
Tbl. 1: Applicable documents
The brief instructions for the gauge are included in the scope of delivery.
You can find these documents in the Pfeiffer Vacuum Download Center.
1.1.2 Variants
This document applies to products with the following part numbers:
Part number Designation
PT R21 251 IKR 270 (DN 40 CF-F, short version)
PT R21 261 IKR 270 (DN 40 CF-F, long version)
Tbl. 2: Variants
You can find the part number on the rating plate of the product.
Pfeiffer Vacuum reserves the right to make technical changes without prior notification.
The figures in this document are not to scale.
Dimensions are in mm unless stated otherwise.
1.2 Target group
These operating instructions are aimed at all persons performing the following activities on the product:
●Transportation
●Setup (Installation)
●Usage and operation
●Decommissioning
●Maintenance and cleaning
●Storage or disposal
The work described in this document is only permitted to be performed by persons with the appropriate
technical qualifications (expert personnel) or who have received the relevant training from Pfeiffer Vac-
uum.
About this manual
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1.3 Conventions
1.3.1 Instructions in the text
Usage instructions in the document follow a general structure that is complete in itself. The required ac-
tion is indicated by an individual step or multi-part action steps.
Individual action step
A horizontal, solid triangle indicates the only step in an action.
►This is an individual action step.
Sequence of multi-part action steps
The numerical list indicates an action with multiple necessary steps.
1. Step 1
2. Step 2
3. ...
1.3.2 Pictographs
The pictographs used in the document indicate useful information.
Note
Tip
Wear laboratory gloves
Perform a visual inspection
1.3.3 Stickers on the product
This section describes all the stickers on the product along with their meaning.
D-35614 Asslar
Mod.
P/N
S/N
Input
IKR 270
PT Rxx xxx
xxxxxxxxx
15...30 V DC 2 W
Made in Liechtenstein 2019/04
3103457
Rating plate
The rating plate is on the top of the device.
10 cm
4”
Warning against magnetic fields
The sticker displays a warning that the magnetic
field of the gauge can interfere with the function-
ing of pacemakers, and specifies the minimum
distance to the gauge which must be maintained
by persons with pacemaker implants.
1.3.4 Abbreviations
Abbreviation Explanation
c Constant for converting measuring signal and pressure
C Calibration factor for calculating the pressure for gases other than air
d Constant for converting measuring signal and pressure
MSL Mean sea level
About this manual
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Abbreviation Explanation
p Pressure
WAF Width across flats
U Measuring signal [V] (output voltage)
Tbl. 3: Abbreviations used
1.4 Trademark proof
●Hirschmann® is a registered trademark of Hirschmann Electronics GmbH.
●Scotch-Brite® is a registered trademark of the 3M Company.
About this manual
7/46

2 Safety
2.1 General safety information
The following 4 risk levels and 1 information level are taken into account in this document.
DANGER
Immediately pending danger
Indicates an immediately pending danger that will result in death or serious injury if not observed.
►Instructions to avoid the danger situation
WARNING
Potential pending danger
Indicates a pending danger that could result in death or serious injury if not observed.
►Instructions to avoid the danger situation
CAUTION
Potential pending danger
Indicates a pending danger that could result in minor injuries if not observed.
►Instructions to avoid the danger situation
NOTICE
Danger of damage to property
Is used to highlight actions that are not associated with personal injury.
►Instructions to avoid damage to property
Notes, tips or examples indicate important information about the product or about this docu-
ment.
2.2 Safety instructions
Safety instructions according to product’s life stages
All safety instructions in this document are based on the results of a risk assessment.
Pfeiffer Vacuum has taken into account all the relevant life stages of the product.
Risks during installation
DANGER
Danger to life due to dangerous contact voltage
Voltages above 30 V (AC) or 60 V (DC) are considered dangerous in accordance with EN 61010. If
you come into contact with dangerous contact voltage, this can result in injury through electric shocks
or even death.
►Only connect the product to devices which meet the following criteria:
●Requirements of the earthed protective extra-low voltage (PELV)
●Limited power source (LPS) Class 2
►Secure the line to the product.
–Pfeiffer Vacuum measuring and control equipment complies with this requirement.
Safety
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DANGER
Risk to life due to electric shock
An improperly earthed product is potentially fatal in the event of a fault.
►Connect the product galvanically with the earthed vacuum chamber.
►Ensure that the connection complies with the requirements of a protective bonding according to
EN 61010. (CF and VCR connections comply with this requirement.)
►Use electrically conductive centering rings and circlips for KF connections.
WARNING
Danger from magnetic fields
The product has a magnetic field that disturbs or impairs the function of electronic devices (e.g. pace-
makers).
►Maintain the distances specified by the manufacturer of the pacemakers.
–Pfeiffer Vacuum recommends a safety distance of at least 130 mm between the pacemaker
and the product.
►Avoid the influence of strong magnetic fields by means of magnetic field shielding.
Risks during maintenance
DANGER
Risk to life due to electric shock
If no earth connection is established, voltage flows become hazardous to the touch and could lead to
electronic components sustaining damage.
►Always tighten the electronic unit with the grub screw.
►Ensure that the grub screw of the electronic unit has been tightened correctly.
DANGER
Electric shocks due to moisture penetrating into the device
Moisture that has penetrated into the device results in personal injury through electric shocks.
►Only operate the device in a dry environment.
►Operate the device away from fluids and humidity sources.
►Do not switch on the device if fluid has penetrated into it, instead contact Pfeiffer Vacuum Serv-
ice.
►Always disconnect the current supply before cleaning the device.
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
WARNING
Health hazards due to cleaning agent
The cleaning agents used cause health hazards.
►When handling cleaning agents, observe the applicable regulations.
►Adhere to safety measures regarding handling and disposal of cleaning agents.
►Be aware of potential reactions with product materials.
Safety
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Risks when shipping
WARNING
Risk of poisoning from contaminated products
Where products that contain harmful substances are shipped for maintenance or repair purposes, the
safety of service personnel is at risk.
►Comply with the instructions for safe shipping.
Risks during disposal
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
2.3 Safety precautions
The product is designed according to the latest technology and recognized safety engineering rules.
Nevertheless, improper use can result in danger to operator all third party life and limb, and product
damage and additional property damage.
Duty to provide information on potential dangers
The product holder or user is obliged to make all operating personnel aware of dangers
posed by this product.
Every person who is involved in the installation, operation or maintenance of the product
must read, understand and adhere to the safety-related parts of this document.
Infringement of conformity due to modifications to the product
The Declaration of Conformity from the manufacturer is no longer valid if the operator
changes the original product or installs additional equipment.
●Following the installation into a system, the operator is required to check and re-evalu-
ate the conformity of the overall system in the context of the relevant European Direc-
tives, before commissioning that system.
General safety precautions when handling the product
►Observe all applicable safety and accident prevention regulations.
►Check that all safety measures are observed at regular intervals.
►Pass on safety instructions to all other users.
►Do not expose body parts to the vacuum.
►Always ensure a secure connection to the earthed conductor (PE).
►Never disconnect plug connections during operation.
►Observe the above shutdown procedures.
►Keep lines and cables away from hot surfaces (> 70 °C).
►Do not carry out your own conversions or modifications on the device.
►Observe the unit protection degree prior to installation or operation in other environments.
►Provide suitable touch protection, if the surface temperature exceeds 70 °C.
►Inform yourself about any contamination before starting work.
2.4 Proper use
The gauge provides a vacuum measurement of gases within the range of 5 × 10-11 to 1 × 10-2 hPa.
Safety
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Use the product according to its intended purpose
►Operate the gauge with a Pfeiffer Vacuum total pressure measuring and control unit or with an
evaluation unit provided by the customer.
►Install, operate and maintain the gauge exclusively as prescribed in these operating instructions.
►Observe the application limits prescribed in the technical data.
►Observe the technical data.
2.5 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Any use that is counter to the
purpose of the product, whether intentional or unintentional, is regarded as misuse, in particular:
●Use outside the mechanical and electrical application limits in accordance with the technical data
●Use with corrosive or explosive media, if this is not explicitly permitted
●Use outdoors
●Use after technical changes (on the inside or the outside of the product)
●Use with replacement or accessory parts that are unsuitable or are not approved
2.6 Responsibilities and warranty
Pfeiffer Vacuum shall assume no responsibilities and warranty if the operating company or a third party:
●disregards this document
●does not use the product for its intended purpose
●carries out any modifications to the product (conversions, changes, etc.) that are not listed in the
corresponding product documentation
●operates the product with accessories that are not listed in the corresponding product documenta-
tion
The operator is responsible for the process media used.
2.7 Owner requirements
Safety-conscious working
1. Only operate the product in a technically flawless state.
2. Operate the product in line with its intended purpose, safety and hazard-conscious and only in
compliance with these operating instructions.
3. Fulfill the following instructions and monitor the observation of the following instructions:
–Proper use
–Generally applicable safety instructions and accident prevention regulations
–International, national and locally applicable standards and guidelines
–Additional product-related guidelines and regulations
4. Only use original parts or parts approved by Pfeiffer Vacuum.
5. Keep the operating instructions available at the place of installation.
6. Ensure personnel qualification.
2.8 Personnel qualification
The work described in this document may only be carried out by persons who have appropriate profes-
sional qualifications and the necessary experience or who have completed the necessary training as
provided by Pfeiffer Vacuum.
Training people
1. Train the technical personnel on the product.
2. Only let personnel to be trained work with and on the product when under the supervision of
trained personnel.
3. Only allow trained technical personnel to work with the product.
4. Before starting work, make sure that the commissioned personnel have read and understood
these operating instructions and all applicable documents, in particular the safety, maintenance
and repair information.
Safety
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2.8.1 Ensuring personnel qualification
Specialist for mechanical work
Only a trained specialist may carry out mechanical work. Within the meaning of this document, special-
ists are people responsible for construction, mechanical installation, troubleshooting and maintenance
of the product, and who have the following qualifications:
●Qualification in the mechanical field in accordance with nationally applicable regulations
●Knowledge of this documentation
Specialist for electrotechnical work
Only a trained electrician may carry out electrical engineering work. Within the meaning of this docu-
ment, electricians are people responsible for electrical installation, commissioning, troubleshooting, and
maintenance of the product, and who have the following qualifications:
●Qualification in the electrical engineering field in accordance with nationally applicable regulations
●Knowledge of this documentation
In addition, these individuals must be familiar with applicable safety regulations and laws, as well as the
other standards, guidelines, and laws referred to in this documentation. The above individuals must
have an explicitly granted operational authorization to commission, program, configure, mark, and earth
devices, systems, and circuits in accordance with safety technology standards.
Trained individuals
Only adequately trained individuals may carry out all works in other transport, storage, operation and
disposal fields. Such training must ensure that individuals are capable of carrying out the required activi-
ties and work steps safely and properly.
2.8.2 Personnel qualification for maintenance and repair
Advanced training courses
Pfeiffer Vacuum offers advanced training courses to maintenance levels 2 and 3.
Adequately trained individuals are:
●Maintenance level 1
─Customer (trained specialist)
●Maintenance level 2
─Customer with technical education
─Pfeiffer Vacuum service technician
●Maintenance level 3
─Customer with Pfeiffer Vacuum service training
─Pfeiffer Vacuum service technician
2.8.3 Advanced training with Pfeiffer Vacuum
For optimal and trouble-free use of this product, Pfeiffer Vacuum offers a comprehensive range of
courses and technical trainings.
For more information, please contact Pfeiffer Vacuum technical training.
2.9 Operator requirements
Observing relevant documents and data
1. Read, observe and follow this operating instruction and the work instructions prepared by the op-
erating company, in particular the safety and warning instructions.
2. Install, operate and maintain the product only in accordance with these operating instructions.
3. Carry out all work only on the basis of the complete operating instructions and applicable docu-
ments.
4. Comply with the application limits.
5. Observe the technical data.
6. Please contact the Pfeiffer Vacuum Service Center if your questions on operation or maintenance
of the product are not answered by these operating instructions.
–You can find information in the Pfeiffer Vacuum service area.
Safety
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3 Product description
3.1 Function
WARNING
Danger from magnetic fields
The product has a magnetic field that disturbs or impairs the function of electronic devices (e.g. pace-
makers).
►Maintain the distances specified by the manufacturer of the pacemakers.
–Pfeiffer Vacuum recommends a safety distance of at least 130 mm between the pacemaker
and the product.
►Avoid the influence of strong magnetic fields by means of magnetic field shielding.
The gauge has a cold cathode measuring system functioning to the principle of the inverted magnetron.
The measuring signal is logarithmically dependent on the pressure across the entire measuring range.
3.2 Status display
The LED on the top of the gauge indicates the operating status of the gauge.
1
Fig. 1: Light emitting diode
1 Green LED
LED Operation status
lights up Supply voltage available
Off No supply voltage available
Tbl. 4: Operation status
3.3 Identifying the product
You will need all the data from the rating plate to safely identify the product when communicating with
Pfeiffer Vacuum.
1. Read the data on the product rating plate.
2. Record this data.
3. Always have all rating plate specifications to hand.
3.4 Scope of delivery
The scope of delivery includes the following parts:
Product description
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●Gauge
●Brief instructions
Unpacking the product and checking completeness of the shipment
1. Unpack the product.
2. Remove the transport fasteners, transport protection etc.
3. Store the transport fasteners, transport protection etc. in a safe place.
4. Check that the shipment is complete.
5. Ensure that no parts are damaged.
Product description
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4 Transport and storage
4.1 Transporting the product
NOTICE
Damage caused by incorrect transportation
Transportation in unsuitable packaging, or failure to install all transport locks, can damage the prod-
uct.
►Comply with the instructions for safe transportation.
Packing
We recommend keeping the transport packaging and original protective cover.
General information regarding safe transport
►Observe the weight specified on the transport packaging.
►Where possible, always transport or ship the product in the original transport packaging.
►Always use dense and impact-proof transport packaging for the product.
►Remove the existing protective cover and transport protections only immediately prior to installa-
tion.
►Reattach transport locks and transport protections prior to each transport.
4.2 Storing the product
NOTICE
Damage caused by improper storage
Improper storage will lead to damage to the product.
Static charging, moisture, etc. lead to defects on the electronic components.
►Comply with the instructions for safe storage.
Packing
We recommend storing the product in its original packaging.
General information for safe storage
►Store the product in a cool, dry, dust-free place, where it is protected against impacts and me-
chanical vibration.
►Always use dense and impact-proof packaging for the product.
►Where possible, store the product in its original packaging.
►Store electronic components in antistatic packaging.
►Maintain the permissible storage temperature.
►Avoid extreme fluctuations of the ambient temperature.
►Avoid high air humidity.
►Seal connections with the original protective caps.
►Protect the product with the original transport protection (where available).
Transport and storage
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5 Installation
5.1 Establishing the vacuum connection
DANGER
Risk to life due to electric shock
An improperly earthed product is potentially fatal in the event of a fault.
►Connect the product galvanically with the earthed vacuum chamber.
►Ensure that the connection complies with the requirements of a protective bonding according to
EN 61010. (CF and VCR connections comply with this requirement.)
►Use electrically conductive centering rings and circlips for KF connections.
DANGER
Risk to life due to electric shock
If no earth connection is established, voltage flows become hazardous to the touch and could lead to
electronic components sustaining damage.
►Always tighten the electronic unit with the grub screw.
►Ensure that the grub screw of the electronic unit has been tightened correctly.
NOTICE
Impairment from contamination and damage
Touching the devices or components with bare hands increases the desorption rate and leads to in-
correct measurements. Dirt (e.g. dust, fingerprints, etc.) and damage impair the function.
►When working on high or ultra high vacuum systems, always wear clean, lint-free and powder-
free laboratory gloves.
►Only use clean tools.
►Make sure that the connection flanges are free of grease.
►Remove protective caps and protective covers from flanges and connections only when necessa-
ry.
►Carry out all work in a well lit area.
NOTICE
Electric flashover from helium
Helium can cause electric flashovers in the unit’s electronics which will destroy the electronics.
►Switch off the unit before carrying out a leak test.
►Remove the electronic unit before carrying out a leak test.
Prerequisites
●Appropriate ambient conditions
●Operating temperature within permissible range
●Adequate room available for electrical connection (e.g. permissible bending radii for cables)
Installation
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1
2
3
Fig. 2: Establishing the vacuum connection
1 Protective cap 3 Magnetic unit
2 CF flange connection
Procedure
1. Ensure where possible that the gauge is not exposed to any vibrations during operation, as vibra-
tions in general will lead to deviations in the measured values.
2. Recommendation: Assemble the gauge in a horizontal to upright position (flange at the bottom) in
order to prevent any condensate or particles entering the measuring chamber.
3. Recommendation: Remove the magnetic unit of the gauge temporarily wherever installation is on-
ly possible with the magnetic unit removed.
–This will facilitate assembly of the CF flange connection.
4. Remove the protective cap and store in a safe place.
5. Assemble the gauge with vacuum components from the Pfeiffer Vacuum Components Shop on
the vacuum system.
6. If you previously removed the magnetic unit of the gauge, assemble the magnetic unit again.
5.2 Magnetic unit
NOTICE
Impairment from contamination and damage
Touching the devices or components with bare hands increases the desorption rate and leads to in-
correct measurements. Dirt (e.g. dust, fingerprints, etc.) and damage impair the function.
►When working on high or ultra high vacuum systems, always wear clean, lint-free and powder-
free laboratory gloves.
►Only use clean tools.
►Make sure that the connection flanges are free of grease.
►Remove protective caps and protective covers from flanges and connections only when necessa-
ry.
►Carry out all work in a well lit area.
Removal of the magnetic unit should facilitate fitting of the gauge.
Required tools
●Allen key, WAF 1.5
●Open-end wrench, WAF 7
Installation
17/46

5
1
4
2
3
Fig. 3: Magnetic unit
1 Measurement chamber 4 Electronic unit
2 Hexagon head screw 5 Grub screw
3 Magnetic unit
Removing the magnetic unit
1. Loosen the grub screw on the side of the electronic unit.
2. Remove the electronic unit without exerting any rotary movement.
3. Loosen the hexagon head screw on the magnetic unit.
4. Remove the magnetic unit.
–Separation of the magnetic unit and measurement chamber is made more difficult due to the
effect of magnetic force and the tendency for them to tilt easily.
Installing the magnetic unit
Electronic unit
Due to the tolerances, you must fit the same electronic unit when re-assembling.
1. Fit the magnetic unit.
–Fitting of the magnetic unit is made more difficult due to the effect of magnetic force and the
tendency for it to tilt easily.
2. Fasten the hexagon head screw on the magnetic unit.
3. Carefully fit the electronic unit.
4. Push the electronic unit as far as the stop.
5. Secure the grub screw on the side of the electronic unit.
5.3 Establishing the electric connection
DANGER
Danger to life due to dangerous contact voltage
Voltages above 30 V (AC) or 60 V (DC) are considered dangerous in accordance with EN 61010. If
you come into contact with dangerous contact voltage, this can result in injury through electric shocks
or even death.
►Only connect the product to devices which meet the following criteria:
●Requirements of the earthed protective extra-low voltage (PELV)
●Limited power source (LPS) Class 2
►Secure the line to the product.
–Pfeiffer Vacuum measuring and control equipment complies with this requirement.
Installation
18/46

NOTICE
Damage sustained as a result of improper connection
Improper connection, incorrect polarity or impermissible supply voltage will damage the gauge.
►Always connect the supply earth (Pin 5) with the earth for the supply unit.
►Always connect the shielding (Pin 6) with the earth for the supply unit.
Required tools
●Crosshead screwdriver
●Torque wrench (≤ 0.2 Nm)
Required materials
●Measurement cable for a Pfeiffer vacuum total pressure measuring and control unit from the Ac-
tiveLine accessories range
●Self-fabricated measurement cable for an evaluation unit provided by the customer
●Hirschmann cable socket
Establishing the electric connection
1. Connect the measurement cable to the gauge.
2. Tighten the locking screw on the Hirschmann cable socket.
–Tightening torque: ≤ 0.2 Nm
3. Connect the gauge to a Pfeiffer Vacuum total pressure measuring and control unit, or to an evalu-
ation unit provided by the customer.
2
3
1
4
5
6
V–
+
–
+
10
7.15k
10
10k
Fig. 4: Connection diagram
1 Identification 4 Supply
2 Measuring signal 5 Supply earth (GND)
3 Signal earth 6 Shielding
2
5
3
1
6
4
Fig. 5: Measurement cable and Hirschmann cable socket
Installation
19/46

Manufacturing a measurement cable
You can find additional information regarding measurement cable type and conductor cross-sections in
the technical data.
1. Observe the following steps to ensure optimum signal quality, whereby ground loops, differences
in potential or EMC will influence the measuring signal.
2. Use a cable with braided shield.
3. Connect the supply earth directly with the protective earth for power supply pack.
4. Use a differential measuring input and separate signal earth and supply earth.
5. Ensure that the potential difference for surge protection between supply earth and housing is
≤ 6 V.
6. Assemble the Hirschmann cable socket.
Assembling the Hirschmann cable socket
1. Prepare the Hirschmann cable socket as shown in the "Measurement cable and Hirschmann ca-
ble socket" diagram.
2. Solder in the connection cable as prescribed in the terminal connection diagram.
3. Assemble the Hirschmann cable socket.
Installation
20/46