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Summary of Contents for Pfeiffer Vacuum PKR 251
- Page 1 OPERATING INSTRUCTIONS Translation of the Original PKR 251 Pirani/Cold cathode gauge...
- Page 2 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.
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Page 3: Table Of Contents
Foreseeable improper use Responsibilities and warranty Owner requirements Personnel qualification 2.8.1 Ensuring personnel qualification 2.8.2 Personnel qualification for maintenance and repair 2.8.3 Advanced training with Pfeiffer Vacuum Operator requirements Transportation and storage Product description Identifying the product Scope of delivery... - Page 4 Table of contents Service solutions from Pfeiffer Vacuum Ordering information 13.1 Ordering parts 13.2 Spare parts 13.3 Accessories Technical data and dimensions Appendix 15.1 Units of pressure 15.2 Gas throughputs ETL Listed Declaration of conformity 4/52...
- Page 5 List of tables List of tables Tbl. 1: Applicable documents Tbl. 2: Variants Tbl. 3: Abbreviations used Tbl. 4: Operating modes Tbl. 5: Constants Tbl. 6: Conversion table Tbl. 7: Calibration factors for the pressure range < 10 hPa Tbl. 8: Malfunctions Tbl.
- Page 6 List of figures List of figures Fig. 1: Measuring configuration Fig. 2: Establishing the vacuum connection Fig. 3: Removing/installing the magnetic unit (recommended for CF-F) Fig. 4: Connection diagram Fig. 5: Measurement cable and Hirschmann cable socket Fig. 6: Light emitting diode (LED) Fig.
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Page 7: About This Manual
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). -
Page 8: Conventions
This section describes all the stickers on the product along with their meaning. Rating plate D-35614 Asslar The rating plate is located on the top of Mod. PKR 251 PT R26 xxx 3103457 the device. xxxxxxxxx Made in Liechtenstein 2019/04 Input 15...30 V DC 2 W... -
Page 9: Abbreviations
About this manual 1.3.4 Abbreviations Abbreviation Explanation Atmosphere High vacuum cpl. Complete unit Mean sea level Seconds Width across flats Tbl. 3: Abbreviations used 1.4 Trademarks ● FullRange ® is a trademark of Pfeiffer Vacuum GmbH. 9/52... -
Page 10: Safety
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... - Page 11 ► 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.
- Page 12 ► 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.
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Page 13: Safety Precautions
► 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. -
Page 14: Proper Use
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. -
Page 15: Personnel Qualification
─ 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. -
Page 16: Operator Requirements
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. -
Page 17: Transportation And Storage
Transportation and storage 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. -
Page 18: Product Description
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. -
Page 19: Installation
Installation 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. -
Page 20: Removing/Installing The Magnetic Unit
Installation Fig. 2: Establishing the vacuum connection 1 Protective cap 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). -
Page 21: Establishing The Electrical Connection
► 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. 21/52... -
Page 22: Measurement Cable And Hirschmann Cable Socket
► 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. To operate the gauge with a Pfeiffer Vacuum total pressure measuring and control unit, you will require a corresponding measurement cable from the ActiveLine Accessories. - Page 23 Installation Manufacturing a measurement cable 1. Observe the following steps to ensure optimum signal quality, whereby ground loops, differences in potential or EMC will influence the measuring signal. – Use a cable with braided shield and metallic connector housing. – Additional information regarding measurement cable type and conductor cross-sections can be obtained in the technical data.
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Page 24: Operation
Operation 6 Operation Once the supply voltage has been established, the measuring signal is available at the electrical con- nection (Pins 2 and 3). Operating the gauge 1. Respect the stabilization period of at least 10 minutes. 2. Respect the relation between measuring signal and pressure. 3. -
Page 25: Relation: Measuring Signal And Pressure
Operation 6.2 Relation: measuring signal and pressure 1E+04 torr 1E+02 1E+00 1E–02 1E–04 1E–06 1E–08 0.0 0.5 10.5 U [V] Fig. 7: Relation: measuring signal and pressure p Pressure Measuring signal [V] Calculation Validity range: ● 5 × 10 hPa < p < 1000 hPa ●... -
Page 26: Gas Type Dependence
The measuring signal is gas type dependent. The characteristics apply for nitrogen (N ), oxygen (O dry air and carbon monoxide (CO). When operating the gauge with a Pfeiffer Vacuum total pressure measuring and control unit (TPG), you can enter a calibration factor to adjust the displayed measured value. - Page 27 Operation Pressure range from 10 up to 0.1 hPa p [hPa] –1 –2 –3 –4 –5 –6 –6 –5 –4 –3 –2 –1 4 6 8 [hPa] Fig. 9: Pressure range from 10 up to 0.1 hPa Calibration factors Within the pressure range < 10 hPa, the display is linear.
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Page 28: Ignition Delay
Operation Gas type Calibration factor (C) Neon (Ne) Argon (Ar) Krypton (Kr) Xenon (Xe) The calibration factors provided are mean values. Tbl. 7: Calibration factors for the pressure range < 10 6.4 Ignition delay Cold cathode measuring systems have an ignition delay upon activation. This ignition delay is longer for lower pressures and is typically in clean, degassed units: ●... - Page 29 Operation Influencing the degree of contamination It is possible to influence the level of contamination to a certain extent. Particular care should be afford- ed for vapors which are separated in the plasma (e.g. from the cold cathode measuring system). 1.
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Page 30: Disassembly
Disassembly 7 Disassembly 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. - Page 31 Disassembly 5. Recommendation: Remove the magnetic unit of the gauge temporarily if disassembling is only possible with the magnetic unit removed. – This will facilitate disassembling the CF flange connection. 6. Disconnect the gauge from the vacuum system. 7. Put the protective cap on the connection flange. 31/52...
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Page 32: Maintenance
The dominant cold cathode measuring circuit for the low pressure range (< 1 × 10 hPa) has been cali- brated by Pfeiffer Vacuum to a fixed value at the factory. It is possible, however, to readjust the Pirani measuring circuit. Calibration has a negligible influence on the pressure range between approximately hPa and 10 hPa. -
Page 33: Calibrating The Gauge (Hv)
Maintenance Fig. 11: Calibrating the gauge (HV) 1 Button Rating plate (rotatable) 2 Potentiometer "HV" Performing an HV calibration Required tools ● Screwdriver (1.5 mm) ● Stylus (max. Ø 3 mm) Required aids ● Control unit or voltmeter 1. Activate the gauge, as near as possible to the subsequent operating position. 2. -
Page 34: Disassembling The Gauge
Maintenance Required aids ● Control unit or voltmeter 1. Activate the gauge, as near as possible to the subsequent operating position. 2. Allow the gauge to run for at least 10 minutes at atmospheric pressure. 3. Turn the rating plate in a clockwise direction up to the stop. 4. -
Page 35: Cleaning Of Components
► 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. - Page 36 ► Do not use solvents as they attack the surface. ► Do not use any aggressive or abrasive cleaning agents. Cleaning the measurement chamber Pfeiffer Vacuum recommends replacing the Pirani measuring element when cleaning the measurement chamber. Replacing the Pirani measuring element Pfeiffer Vacuum recommends replacing any heavily contaminated or faulty Pirani measur- ing elements.
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Page 37: Assembling The Gauge
Maintenance Required spare parts ● FPM seal (Pirani measuring element) 1. Disassemble the gauge to the degree required. 2. Remove the FPM seal from the Pirani measuring element. 3. Fill the small tube of the measuring element with industrial alcohol. 4. - Page 38 Maintenance Required spare part ● Ignition aid 1. Insert the new ignition aid in the mounting tool. 2. Carefully push the anode (either new or cleaned) into the ignition aid, in the center, and parallel to the tool axis. 3. Insert the anode approx. 15 mm. Positioning the anode The final positioning will be achieved only after the installation of the anode.
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Page 39: Malfunctions
Malfunctions 9 Malfunctions Warranty Malfunctioning of the equipment as a direct result of contamination or wear, as well as wear parts (e.g. ignition aid) is not covered by the warranty. Problem Possible cause Remedy Continuous measuring signal < 0.5 V No supply Switch on supply "Error low"... -
Page 40: Shipping
► Comply with the instructions for safe shipping. Shipping the product safely Decontamination subject to charge Pfeiffer Vacuum decontaminates products not clearly declared "Free of contamination" at your expense. 1. Do not ship microbiological, explosive or radioactively contaminated products. 2. Observe the shipping guidelines for the participating countries and transport companies. -
Page 41: Disposal
Disposal 11 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. -
Page 42: Service Solutions From Pfeiffer Vacuum
We are consistently striving to perfect our core competence, service for vacuum components. And our service is far from over once you’ve purchased a product from Pfeiffer Vacuum. It often enough really just begins then. In proven Pfeiffer Vacuum quality, of course. - Page 43 Service solutions from Pfeiffer Vacuum 5. Prepare the product for transport in accordance with the details in the declaration of contamination. a) Neutralize the product with nitrogen or dry air. b) Close all openings with airtight blank flanges. c) Seal the product in appropriate protective film.
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Page 44: Ordering Information
BN 846 239 -T Item 3 (3×), item 4 (1×), item 5 (1×), item 6 (1×) Repair kit, PKR 251, complete BN 846 238 -T Item 2 (1×), item 3 (3×), item 4 (1×), item 5 (1×), item 6 (1×), item 7 (1×) -
Page 45: Accessories
PT R26 002 -A Exchange gauge (DN 40 CF-F) 13.3 Accessories Installation and operation of accessories Pfeiffer Vacuum offers a series of special, compatible accessories for its products. ● Information and ordering options for ActiveLine accessories can be found online. Description... -
Page 46: Technical Data And Dimensions
100 m (0.34 mm / conductor) max. 300 m (1.0 mm / conductor) The minimum voltage for the supply unit must be increased proportional to the cable length. Pfeiffer Vacuum measuring and control equipment complies with this requirement. 46/52... -
Page 47: Tbl. 10: Electrical Data
Technical data and dimensions Parameter Value Earthing concept (see chapter “Establishing the electrical connection”, page 21) Vacuum connection and signal Connected with 10 kΩ (max. differential ground voltage with regard to safety ± 50 V, with regard to accuracy ± 10 V) Supply earth and signal earth Channeled separately;... -
Page 48: Dimensions
Technical data and dimensions VACUUM VACUUM 101.5 18.5 VACUUM VACUUM Fig. 17: Dimensions Dimensions in mm. 48/52... -
Page 49: Appendix
Appendix 15 Appendix 15.1 Units of pressure Unit mbar Torr / mm Hg mbar 1 · 10 0.75 1000 1000 1 · 10 0.01 0.01 1 · 10 1 · 10 7.5 · 10 0.75 1 · 10 0.01 1000 Torr / mm Hg 1.33 133.32 1.33... -
Page 50: Etl Listed
ETL LISTED The product PKR 251 - conforms to the UL standard UL 61010-1. - is certified to the CAN/CSA standard CAN/CSA C22.2 No. 61010-1. 3103457... -
Page 51: Declaration Of Conformity
We hereby declare that the product cited below satisfies all relevant provisions of the follow- ing EU Directives: ● Electromagnetic compatibility 2014/30/EU ● Restriction of the use of certain hazardous substances 2011/65/EU Pirani/cold cathode gauge PKR 251 Harmonized standards and applied national standards and specifications: DIN EN 61000-6-2:2006-03 DIN EN 61000-6-3:2011-09 DIN EN 61010-1:2011-07...
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