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Summary of Contents for Pfeiffer Vacuum IKR 251
- Page 1 OPERATING INSTRUCTIONS Translation of the Original IKR 251 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
Determining effective pressure with correction factors Observing ignition delay Pollution Removal Maintenance Maintaining the gauge Disassembling gauge Cleaning of components Gauge assembling Malfunctions Shipping Recycling and disposal 11.1 General disposal information 11.2 Dispose of gauges Service solutions by Pfeiffer Vacuum 3/48... - Page 4 Table of contents Spare parts Accessories 14.1 Accessory information 14.2 Ordering accessories Technical data and dimensions 15.1 General 15.2 Technical data 15.3 Dimensions ETL certification EC Declaration of Conformity UK Declaration of Conformity 4/48...
- Page 5 List of tables List of tables Tbl. 1: Applicable documents Tbl. 2: Variants Tbl. 3: Abbreviations used Tbl. 4: Permissible ambient conditions Tbl. 5: Operation status Tbl. 6: Constants for converting measuring signal and pressure Tbl. 7: Conversion table Tbl. 8: Correction factor for pressure range <...
- Page 6 List of figures List of figures Fig. 1: Light emitting diode Fig. 2: Establishing vacuum connection Fig. 3: Removing/installing magnetic unit Fig. 4: Connection diagram Fig. 5: Measurement cable and Hirschmann cable socket Fig. 6: Relation between measuring signal and pressure Fig.
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Page 7: About This Manual
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. Information that relates to only one of the products is indicated accordingly. The figures in this document are not to scale. -
Page 8: Conventions
About this manual 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. -
Page 9: Abbreviations
About this manual 1.3.4 Abbreviations Abbreviation Explanation Constant for converting measuring signal and pressure Correction factor for calculating the pressure of gases other than air Constant for converting measuring signal and pressure Fluorinated rubber Mean sea level Pressure Width Across Flats Measuring signal [V] (output voltage) Tbl. -
Page 10: Safety
Safety instructions according to product 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. - 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.
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Page 12: Safety Precautions
► Only operate the unit in a dry environment. ► Operate the unit away from fluids and sources of moisture. ► Do not switch on the unit if fluid has entered it. Instead contact Pfeiffer Vacuum Service. ► Always disconnect the power supply before cleaning the unit. -
Page 13: Limits Of Use Of Product
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. - Page 14 Safety ● Use outdoors ● Use after technical changes (inside or outside on the product) ● Use with replacement or accessory parts that are not suitable or not approved 14/48...
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Page 15: Product Description
► 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 16 Product description 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.
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Page 17: Transport And Storage
Transport and storage 4 Transport and storage 4.1 Transporting the product NOTICE Damage caused by incorrect transport Transport in unsuitable packaging or failure to install all transport locks can result in damage to the product. ► Comply with the instructions for safe transport. Packing We recommend keeping the transport packaging and original protective cover. -
Page 18: Installation
Installation 5 Installation 5.1 Establishing 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 19: Removing/Installing Magnetic Unit
– This will facilitate assembly of the CF flange connection. Procedure 1. Remove the protective cap and store in a safe place. 2. Assemble the gauge with vacuum components from the Pfeiffer Vacuum Components Shop the vacuum system. 5.2 Removing/installing magnetic unit NOTICE... -
Page 20: Establishing Electric Connection
● 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. NOTICE Damage sustained as a result of improper connection Improper connection, incorrect polarity or impermissible supply voltage will damage the gauge. - Page 21 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 an evalua- tion unit provided by the customer. 10Ω...
- Page 22 Installation 5. Ensure that the potential difference for surge protection between the supply earth and the 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"...
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Page 23: Operation
2 and 3. Controlling the IKR gauge with a Pirani gauge For Pfeiffer Vacuum total pressure measuring and control units with at least 2 gauge con- nections, the IKR gauge can be controlled with a Pirani gauge, for example. -
Page 24: Determining Effective Pressure With Correction Factors
Operation Measuring signal (U) Pressure (p) [hPa] [Torr] [Pa] < 0.5 Sensor error 0.5 – 1.8 Underrange 2.0 × 10 1.5 × 10 2.0 × 10 1.0 × 10 7.5 × 10 1.0 × 10 1.0 × 10 7.5 × 10 1.0 ×... - Page 25 Operation p [hPa] Xe Kr Ne He –3 –4 –5 –6 –7 –7 –6 –5 –4 –3 –2 [hPa] Fig. 7: Displayed pressure In the pressure range < 10 hPa, the display is linear. Gas and vapor mixtures Process gases are mostly mixtures of gas and vapor. Precise measuring of gas and vapor mixtures is only possible using partial pressure measurement instruments, for example a quadrupole mass spectrometer.
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Page 26: Observing Ignition Delay
Operation Calculating pressure for gases other than air ► Calculate the effective pressure using the following formula: = C × p ● P = Effective pressure ● C = Correction factor ● p = Displayed pressure (gauge calibrated for air) 6.3 Observing ignition delay Cold cathode measurement systems have an ignition delay when they are switched on. -
Page 27: Removal
Removal 7 Removal 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 28 Removal Fig. 8: Removing gauge 1 Measurement cable Protective cap 2 Tensioning piece Removing gauge 1. Loosen the locking screw of the Hirschmann cable socket on the gauge. 2. Disconnect the measurement cable from the gauge. 3. Recommendation: Dismantle the magnetic unit of the gauge temporarily if disassembly is only possible with the magnetic unit removed.
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Page 29: Maintenance
Contact the Pfeiffer Vacuum Service Center in the event of process-related shorter mainte- nance intervals. 8.1 Maintaining the gauge Pfeiffer Vacuum has calibrated the gauge to standard values at the factory. The gauge is maintenance- free. Replacing a faulty gauge ► If the gauge is defective, you must replace the entire gauge. -
Page 30: Disassembling Gauge
Maintenance 8.2 Disassembling gauge 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. -
Page 31: Cleaning Of Components
► Operate the unit away from fluids and sources of moisture. ► Take special precautions if there is a risk of dripping water. ► Do not switch on the unit if fluid has penetrated into it, instead contact the Pfeiffer Vacuum Serv- ice Center. -
Page 32: Gauge Assembling
Maintenance External cleaning of the device 1. Always use a cloth soaked in industrial alcohol for external cleaning. 2. Allow the surfaces to dry thoroughly after cleaning. Cleaning the measurement chamber and polarity insert 1. Disassemble the gauge to the degree required. 2. - Page 33 Maintenance Spare parts required ● Repair kit BN 846 252 -T Required consumables ● Dry nitrogen for blowing out Fig. 10: Mounting tool for the ignition aid 1 Anode Mounting tool 2 Ignition aid Replacing the ignition aid 1. Insert the new ignition aid in the mounting tool. 2.
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Page 34: Malfunctions
Malfunctions 9 Malfunctions Warranty Malfunctions of the unit as a direct result of contamination or wear, and also wear parts (e.g., ignition aid) are not covered by the warranty. Malfunction Possible cause Remedy Continuous measuring signal < 0.5 V and No supply Switch the supply on. -
Page 35: Shipping
► Comply with the instructions for safe distribution. Decontamination subject to charge Pfeiffer Vacuum decontaminates products not clearly declared "Free of contamination" at your expense. Ship product safely ► Do not ship microbiological, explosive or radioactively contaminated products. -
Page 36: Recycling And Disposal
● Help to reduce the wastage of natural resources. ● Prevent contamination. 11.1 General disposal information Pfeiffer Vacuum products contain materials that you must recycle. ► Dispose of our products according to the following: – Iron – Aluminium –... -
Page 37: Service Solutions By Pfeiffer Vacuum
We are always focused on perfecting our core competence – servicing of vacuum components. Once you have purchased a product from Pfeiffer Vacuum, our service is far from over. This is often exactly where service begins. Obviously, in proven Pfeiffer Vacuum quality. - Page 38 Service solutions by Pfeiffer Vacuum 5. Prepare the product for transport in accordance with the provisions in the contamination declaration. a) Neutralize the product with nitrogen or dry air. b) Seal all openings with blind flanges, so that they are airtight.
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Page 39: Spare Parts
PT R25 501 -A Exchange gauge (DN 40 ISO-KF) PT R25 502 -A Exchange gauge (DN 40 CF-F) Return the defective gauge to Pfeiffer Vacuum. Return the defective gauge to Pfeiffer Vacuum. Return the defective gauge to Pfeiffer Vacuum. 39/48... -
Page 40: Accessories
ActiveLine on our website. 14.1 Accessory information Measurement cable Measurement cable in different lengths, for connecting to a Pfeiffer Vacuum total pressure measuring and control unit Mating connector Cable socket for fabrication of the application-specific connecting cable... -
Page 41: Technical Data And Dimensions
Technical data and dimensions 15 Technical data and dimensions 15.1 General 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... - Page 42 DN 25: Stainless steel (1.4104) for DN 40: Stainless steel (1.4306) The minimum voltage for the supply unit must be increased proportionally with the cable length. Pfeiffer Vacuum measuring and control units comply with this requirement. Without electronic unit and magnetic shielding 42/48...
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Page 43: Dimensions
Technical data and dimensions Parameter Value Measurement chamber Stainless steel (1.4104) Insulating bushing Ceramic (Al ), glass Internal seals FKM75 Anode Molybdenum (Mo) Ignition aid Stainless steel (1.4310) Tbl. 17: Substances in contact with media 15.3 Dimensions 101.5 18.5 VACUUM VACUUM Compact Compact Full Range... -
Page 44: Etl Certification
ETL LISTED The product IKR 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 45: Ec Declaration Of Conformity
This declaration of conformity has been issued under the sole responsibility of the manufac- turer. Declaration for product(s) of the type: Cold cathode gauge IKR 251 We hereby declare that the listed product satisfies all relevant provisions of the following European Directives. Electromagnetic compatibility 2014/30/EU... -
Page 46: Declaration Of Conformity
EN IEC 61326-1:2021 EN IEC 63000:2018 The manufacturer's authorized representative in the United Kingdom and the authorized agent for compiling the technical documentation is Pfeiffer Vacuum Ltd, 16 Plover Close, In- terchange Park, MK169PS Newport Pagnell. Signature: Pfeiffer Vacuum GmbH Berliner Straße 43... - Page 47 47/48...
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