Pfeiffer Vacuum FullRange PKR 251 User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
PKR 251
Pirani/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 7
1.1 Validity 7
1.1.1 Applicable documents 7
1.1.2 Variants 7
1.2 Target group 7
1.3 Conventions 8
1.3.1 Instructions in the text 8
1.3.2 Pictographs 8
1.3.3 Stickers on the product 8
1.3.4 Abbreviations 9
1.4 Trademarks 9
2 Safety 10
2.1 General safety instructions 10
2.2 Safety instructions 10
2.3 Safety precautions 13
2.4 Proper use 14
2.5 Foreseeable improper use 14
2.6 Responsibilities and warranty 14
2.7 Owner requirements 14
2.8 Personnel qualification 15
2.8.1 Ensuring personnel qualification 15
2.8.2 Personnel qualification for maintenance and repair 15
2.8.3 Advanced training with Pfeiffer Vacuum 15
2.9 Operator requirements 16
3 Transportation and storage 17
4 Product description 18
4.1 Identifying the product 18
4.2 Scope of delivery 18
4.3 Function 18
5 Installation 19
5.1 Establishing the vacuum connection 19
5.2 Removing/installing the magnetic unit 20
5.3 Establishing the electrical connection 21
6 Operation 24
6.1 Status display 24
6.2 Relation: measuring signal and pressure 25
6.3 Gas type dependence 26
6.4 Ignition delay 28
6.5 Contamination 28
7 Disassembly 30
8 Maintenance 32
8.1 Calibrating the gauge 32
8.2 Disassembling the gauge 34
8.3 Cleaning of components 35
8.4 Assembling the gauge 37
9 Malfunctions 39
10 Shipping 40
11 Disposal 41
Table of contents
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12 Service solutions from Pfeiffer Vacuum 42
13 Ordering information 44
13.1 Ordering parts 44
13.2 Spare parts 44
13.3 Accessories 45
14 Technical data and dimensions 46
15 Appendix 49
15.1 Units of pressure 49
15.2 Gas throughputs 49
ETL Listed 50
Declaration of conformity 51
Table of contents
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List of tables
Tbl. 1: Applicable documents 7
Tbl. 2: Variants 7
Tbl. 3: Abbreviations used 9
Tbl. 4: Operating modes 24
Tbl. 5: Constants 25
Tbl. 6: Conversion table 26
Tbl. 7: Calibration factors for the pressure range < 10 hPa 28
Tbl. 8: Malfunctions 39
Tbl. 9: Measuring and pressure values 46
Tbl. 10: Electrical data 47
Tbl. 11: Internal volume and weight 47
Tbl. 12: Ambient conditions 47
Tbl. 13: Temperatures 47
Tbl. 14: Material against vacuum 47
Tbl. 15: Units of pressure and their conversion 49
Tbl. 16: Gas throughputs and their conversion 49
List of tables
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List of figures
Fig. 1: Measuring configuration 18
Fig. 2: Establishing the vacuum connection 20
Fig. 3: Removing/installing the magnetic unit (recommended for CF-F) 21
Fig. 4: Connection diagram 22
Fig. 5: Measurement cable and Hirschmann cable socket 22
Fig. 6: Light emitting diode (LED) 24
Fig. 7: Relation: measuring signal and pressure 25
Fig. 8: Pressure range > 10 hPa, solely Pirani operation 26
Fig. 9: Pressure range from 10 up to 0.1 hPa 27
Fig. 10: Disassembling the gauge 30
Fig. 11: Calibrating the gauge (HV) 33
Fig. 12: Calibrating the gauge (ATM) 33
Fig. 13: Individual parts 34
Fig. 14: Mounting tool for the ignition aid 37
Fig. 15: Spare parts 44
Fig. 16: Filter disk 45
Fig. 17: Dimensions 48
List of figures
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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 "Pirani/Cold cathode gauge"
PKR 251
BG 5119
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 (Part of this document)
Tbl. 1: Applicable documents
The brief instructions for the gauge are included in the scope of delivery.
1.1.2 Variants
This document applies to products with the following part numbers:
Part number Designation
PT R26 000 PKR 251 (DN 25 ISO-KF)
PT R26 001 PKR 251 (DN 40 ISO-KF)
PT R26 002 PKR 251 (DN 40 CF-F)
Tbl. 2: Variants
Information that relates to only one of the devices is indicated as such. Unless otherwise indicated, the
illustrations correspond to the device with DN 25 ISO-KF vacuum connection, however, also apply for
the other vacuum connections accordingly.
The part number is found 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 in mm).
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
About this manual
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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.
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
PKR 251
PT R26 xxx
xxxxxxxxx
15...30 V DC 2 W
Made in Liechtenstein 2019/04
3103457
Rating plate
The rating plate is located 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 functioning of pacemakers, and
specifies the minimum distance to the
gauge which must be maintained by per-
sons with pacemaker implants.
About this manual
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1.3.4 Abbreviations
Abbreviation Explanation
ATM Atmosphere
HV High vacuum
cpl. Complete unit
MSL Mean sea level
s Seconds
WAF Width across flats
Tbl. 3: Abbreviations used
1.4 Trademarks
●FullRange® is a trademark of Pfeiffer Vacuum GmbH.
About this manual
9/52

2 Safety
2.1 General safety instructions
This document includes the following four risk levels and one information level.
DANGER
Imminent danger
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
►Instructions on avoiding the hazardous situation
WARNING
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
►Instructions on avoiding the hazardous situation
CAUTION
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
►Instructions on avoiding the hazardous situation
NOTICE
Danger of property damage
Notice is used to address practices not related to physical injury.
►Instructions on avoiding property damage
Notes, tips or examples indicate important information on the product or on this document.
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 transportation
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.
Risks during storage
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.
Safety
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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.
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.
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.
Risks during operation
WARNING
Risk of injury resulting from overpressure in the vacuum system
Opening tensioning pieces with an overpressure > 1000 hPa in the vacuum system can lead to inju-
ries as a result of flying parts, and escaping process medium could prove harmful to health.
Elastomer seals in KF connections (e.g. O-rings) are not resistant to pressures > 2500 hPa. This
could prove harmful to health due to escaping process medium.
►Do not open any tensioning pieces when overpressure is prevalent in the vacuum system.
►Use suitable tensioning pieces for overpressure.
►Use tensioning pieces which can only be opened and closed using a tool (e.g. tightening strap-
circlip).
►Use sealing rings with an outer centering ring.
Safety
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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.
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.
►During assembly and maintenance work on high or ultra high vacuum systems, always wear
clean, lint-free and powder-free laboratory gloves.
►Only use clean tools.
►During assembly, ensure for connecting flanges 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.
Safety
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NOTICE
Damage caused by penetrating moisture
Penetrating moisture, e.g. through condensation or dripping water, damages the device.
►Protect the device against moisture penetrating.
►Only operate the device in a clean and dry environment.
►Operate the device away from fluids and humidity sources.
►Take special precautions if there is a risk of dripping water.
►Do not switch on the device if fluid has penetrated into it, instead contact the Pfeiffer Vacuum
Service Center.
NOTICE
Damage caused by unsuitable cleaning agents
Unsuitable cleaning agents damage the product.
►Do not use solvents as they attack the surface.
►Do not use any aggressive or abrasive cleaning agents.
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
CAUTION
Health hazard caused by environmentally hazardous substances
Products, operating fluid, electric components, calibration gas residues (for example from test leaks)
or similar pose health hazards.
►Dispose of the environmentally hazardous substances in accordance with local regulations.
►Dispose of calibration gas and test leaks in accordance with local regulations.
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.
Meet fundamental safety measures
1. When handling the gases and contaminated parts used, observe the applicable guidelines.
2. Observe the protective measures.
Safety
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3. Observe the safety guidelines specified in this document.
–All work is only permissible when observing the relevant guidelines and adhering to the pro-
tective measures.
4. Inform yourself about any contamination before starting work.
5. Pass on safety instructions to all other users.
2.4 Proper use
The FullRange gauge provides a vacuum measurement of gases within the range of 5 × 10-9 up to
1000 hPa.
The gauge can not be used for the measurement of highly flammable or combustible gases in the mix-
ture with an oxidizing agent (e.g. atmospheric oxygen) within the explosion limits.
The gauge can be operated with a Pfeiffer Vacuum total pressure measuring and control unit, or with an
evaluation unit provided by the customer.
Using the product according to its intended purpose
1. Install, operate and maintain the product only in accordance with these operating instructions.
2. Comply with the application limits.
3. 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 (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, maintenance work, 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.
Safety
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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.
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 II and III.
Adequately trained individuals are:
●Maintenance level I
─Customer (trained specialist)
●Maintenance level II
─Customer with technical education
─Pfeiffer Vacuum service technician
●Maintenance level III
─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 training.
For more information, please contact Pfeiffer Vacuum technical training.
Safety
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2.9 Operator requirements
Observing relevant documents and data
1. Read, observe and follow this operating instructions 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 this operating manual.
–You can find information in the Pfeiffer Vacuum service area.
Safety
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3 Transportation and storage
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.
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.
Transporting the product safely
1. Observe the weight of the product.
2. Where possible, always transport or ship the product in the original packaging.
3. Always use dense and impact-proof packaging for the product.
4. Remove the existing protective cover and transport protections only immediately prior to installa-
tion.
5. Reattach transport locks and transport protections prior to each transport.
Storing the product safely
1. Store the product in a cool, dry, dust-free place, where it is protected against impacts and me-
chanical vibration.
2. Always use dense and impact-proof packaging for the product.
3. Where possible, store the product in the original packaging.
4. Store electronic components in antistatic packaging.
5. Maintain the permissible storage temperature.
6. Avoid extreme fluctuations of the ambient temperature.
7. Avoid high air humidity.
8. Seal connections with the original protective caps.
9. Protect the product with the original transport protections (where available).
Transportation and storage
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4 Product description
4.1 Identifying the product
You will need all the data from the rating plate to safely identify the product when communicating with
Pfeiffer Vacuum.
Recording rating plate data
1. Read the data on the product rating plate.
2. Record this data.
3. Always have all rating plate specifications to hand.
4.2 Scope of delivery
The shipment includes the following parts:
●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.
4.3 Function
The gauge has 2 measuring systems:
●Pirani measuring system
●Cold cathode measuring system functioning to the principle of the inverted magnetron
The Pirani measuring circuit is switched on at all times. The cold cathode measuring circuit controlled
by the Pirani measuring circuit is only activated by the gauge when the pressures reach p < 1 × 10-2
hPa. Specific linking of both measuring systems ensures that the measuring systems generally behave
as one standardized measuring system for the user. The measuring signal is logarithmically dependent
on the pressure across the entire measuring range.
The gauge applies the optimum measuring configuration for the respective pressure range:
10-4 hPa
10-2 hPa
1000 hPa
5×
10-9 hPa
Cold Cathode Pirani
Fig. 1: Measuring configuration
Product description
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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.
WARNING
Risk of injury resulting from overpressure in the vacuum system
Opening tensioning pieces with an overpressure > 1000 hPa in the vacuum system can lead to inju-
ries as a result of flying parts, and escaping process medium could prove harmful to health.
Elastomer seals in KF connections (e.g. O-rings) are not resistant to pressures > 2500 hPa. This
could prove harmful to health due to escaping process medium.
►Do not open any tensioning pieces when overpressure is prevalent in the vacuum system.
►Use suitable tensioning pieces for overpressure.
►Use tensioning pieces which can only be opened and closed using a tool (e.g. tightening strap-
circlip).
►Use sealing rings with an outer centering ring.
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.
►During assembly and maintenance work on high or ultra high vacuum systems, always wear
clean, lint-free and powder-free laboratory gloves.
►Only use clean tools.
►During assembly, ensure for connecting flanges 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.
Installation
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1
2
Fig. 2: Establishing the vacuum connection
1 Protective cap 2 Tensioning piece
Procedure
1. Ensure that the permissible operating temperature of the gauge is not exceeded.
2. Observe space required for the electrical connection (e.g. permissible bending radii for the ca-
bles).
3. Fit the gauge eliminating any exposure to vibrations where possible.
–Vibrations at the gauge generally lead to deviations in the measured values.
4. Ensure a suitable mounting orientation.
5. Recommendation: Fit the gauge with horizontal to upright mounting orientation.
–This will prevent condensate and particles from accumulating in the measurement chamber.
6. If necessary, fit a seal with centering ring and filter in the event of potential contamination during
use, as well as to protect the measuring system against contamination.
7. Recommendation: Remove the magnetic unit of the gauge temporarily if flange-mounting is only
possible with the magnetic unit removed.
–This will facilitate installation of the CF flange connection.
8. Ensure that both trimming potentiometers of the gauge can be easily accessed with a screwdriver
once fitted.
9. Remove the protective cap and store in a safe place.
10. Connect the gauge to the vacuum system.
11. If it was previously necessary to remove the magnetic unit of the gauge, install the electronic unit
once again.
5.2 Removing/installing the 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.
►During assembly and maintenance work on high or ultra high vacuum systems, always wear
clean, lint-free and powder-free laboratory gloves.
►Only use clean tools.
►During assembly, ensure for connecting flanges 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 the fitting of the gauge.
Installation
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