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Summary of Contents for Pfeiffer Vacuum PKR 261
- Page 1 OPERATING INSTRUCTIONS Translation of the original instructions PKR 261 Compact FullRange® Gauge, All-metal...
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Page 2: Product Identification
It must not be used for measuring flammable or combustible gases in mixtures containing oxidants (e.g. atmospheric oxygen) within the explosion range. The gauge can be used with a Pfeiffer Vacuum measurement unit for Compact Gauges or with another evaluation unit. -
Page 3: Table Of Contents
3 Installation 3.1 Vacuum Connection 3.1.1 Removing the Magnet Unit (Only for Gauges With CF Flanges) 3.2 Electrical Connection 3.2.1 Use With a Pfeiffer Vacuum-Measurement Unit 3.2.2 Use With Another Evaluation Unit 4 Operation 4.1 Measurement Principle, Measurement Behavior 5 Maintenance 5.1 Adjusting the Gauge... -
Page 4: Safety
1 Safety 1.1 Symbols used DANGER Information on preventing any kind of physical injury. WARNING Information on preventing extensive equipment and environmental damage. Caution Information on correct handling or use. Disregard can lead to malfunctions or minor equipment damage. 1.2 Personnel qualifications Skilled personnel All work described in this document may only be carried out by persons who have suitable technical training and the necessary experience or who have been... -
Page 5: Liability And Warranty
1.4 Liability and warranty Pfeiffer Vacuum assumes no liability and the warranty becomes null and void if the custodian or third parties • disregard the information in this document • use the product in a non-conforming manner • make any kind of changes (modifications, alterations etc.) to the product •... -
Page 6: Technical Data
5 poles plus screening maximum cable length 75 m (0.25 mm² conductor) 100 m (0.34 mm² conductor) 300 m (1.0 mm² conductor) Pfeiffer Vacuum measurement and control units for Compact Gauges fulfill these requirements. BG 5157 BEN / C (2017-07) PKR261.oi... - Page 7 Vacuum flange–measuring common connected via 10 kΩ (max. voltage differential with respect to safety ±50 V with respect to accuracy ±10 V) Supply common–signal common conducted separately; differential measurement recommended for cable lengths (≥6 m) BG 5157 BEN / C (2017-07) PKR 261...
- Page 8 PT R26 250 (DN 25 ISO-KF) Materials exposed to the vacuum Flange stainless steel (1.4104) Measuring chamber stainless steel (1.4104) Feedthrough isolation ceramic (Al ), glass Internal seals Ag, Cu, soft solder (Sn, Ag) Anode Ignition aid stainless steel (1.4310 / AISI 301) Pirani measuring tube Ni, Au Pirani filament...
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Page 9: Installation
If clamps are opened unintentionally injury can be caused by catapulted parts. Use the type of clamps which can only be opened and closed by means of a tool (e.g. hose clip clamping ring). BG 5157 BEN / C (2017-07) PKR 261... -
Page 10: Removing The Magnet Unit (Only For Gauges With Cf Flanges)
DANGER The gauge must be electrically connected to the grounded vacuum chamber. The connection must conform to the re- quirements of a protective connection according to EN 61010: • CF flanges fulfill this requirement • For gauges with KF flanges, use a conductive metallic clamping ring. -
Page 11: Electrical Connection
(1). 3.2 Electrical Connection 3.2.1 Use With a If the gauge is used with a Pfeiffer Vacuum- Pfeiffer Vacuum measurement unit for Compact Gauges, a Measurement Unit corresponding connection cable is required (→ 22). •... - Page 12 Solder the connection cable according to the diagram. – Ident – Figure 1 Electrical connection Pin 1 identification Pin 2 signal output (measuring signal) Pin 3 signal common Pin 4 supply Pin 5 supply common Connection socket Pin 6 screen soldering side WARNING...
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Page 13: Operation
Allow for a stabilizing time of approx. 10 min. Once the gauge has been switched on, permanently leave it on irrespective of the pressure. 4.1 Measurement Principle, The PKR 261 gauge consists of two separate measurement systems (Pirani sys- tem and cold cathode system according to the inverted magnetron principle). They Measurement Behavior are combined in such a way that for the user, they normally behave as one uniform measurement system. - Page 14 It indicates "Pirani-Underrange". Caution Once flanged on, permanently leave the PKR 261 gauge in the operating mode irrespective of the pressure range. Like this, the ignition delay of the cold cathode measurement circuit is always negligible (<1 s), and thermal stabilizing effects are minimized.
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Page 15: Maintenance
... to 5×10 hPa ..to 4.2 V. Then turn the potentio- meter counter-clockwise by ≈ 120 ° . Vent with air or nitrogen to atmospheric pressure and then wait 10 minutes. BG 5157 BEN / C (2017-07) PKR 261... -
Page 16: Cleaning The Gauge / Replacing Parts
Turn the nameplate clockwise until the mechanical stop is reached. Adjust the <ATM> potentiometer ..to 1×10 hPa ..to 8.6 V. Turn the nameplate back to its original position (it will catch). 5.2 Cleaning the Gauge / DANGER Replacing Parts DANGER: cleaning agents... -
Page 17: Disassembling The Gauge
Carefully remove the following parts in this order (without exerting stress on the Pirani element (13)): pressure piece (9), anode extension piece (9a), complete anode (10), metal seal (11) incl. centering ring (12). BG 5157 BEN / C (2017-07) PKR 261... -
Page 18: Cleaning The Gauge
Unfasten the screw fitting (13a) of the Pirani element and remove Pirani ele- ment together with the copper seal (13b). The parts can now be cleaned or replaced individually. 5.2.2 Cleaning the Gauge Procedure Cleaning the measuring chamber and the polarity insert: ... -
Page 19: Reassembling The Gauge
Mount the magnet unit (4) and lock it with the hexagon head screw (3). Carefully mount the electronics unit (2). (Make sure the pin of the Pirani ele- ment is properly plugged into the corresponding hole of the electronics unit.) BG 5157 BEN / C (2017-07) PKR 261... -
Page 20: What To Do In Case Of Problems
Push the electronics unit up to the mechanical stop and lock it with the hexagon socket set screw (1). DANGER Due to missing ground connection in conjunction with missing or not correctly tightened hexagon socket set screw (1) danger- ous contact voltage will occur and electronic components will be damaged. -
Page 21: Removing The Gauge From The Vacuum System
When handling vacuum components, take appropriate measures to ensure cleanliness and prevent damages. Procedure Deactivate the gauge. Unplug the connection socket. Remove the gauge from the vacuum system. Place the protective cap. BG 5157 BEN / C (2017-07) PKR 261... -
Page 22: Returning The Product
7 Returning the Product WARNING WARNING: forwarding contaminated products Products returned to Pfeiffer Vacuum for service or repair should, if possible, be free of harmful substances (e.g. radioactive, toxic, caustic or microbiological). Otherwise, the type of contamination must be declared. -
Page 23: Spare Parts
DN 40 ISO-KF flange BN 846 473 -T DN 40 CF-F flange BN 846 474 -T Exchange gauge (return defective gauge to Pfeiffer Vacuum) DN 25 ISO-KF PT R26 250 -A DN 40 ISO-KF PT R26 251 -A DN 40 CF-F... -
Page 24: Appendix
(pressure 5×10 Pa < p < 1×10 unit dependent) Conversion curves Pressure p 1E+04 Torr 1E+02 1E+00 1E–02 1E–04 1E–06 1E–08 0.0 0.5 10.5 Measuring signal U [ V ] BG 5157 BEN / C (2017-07) PKR 261... -
Page 25: C: Gas Type Dependence
Indication range above 10 Pressure indicated (gauge calibrated for air) p (hPa) Freon 12 –1 Water vapor –2 –3 –2 –1 4 6 8 4 6 8 4 6 8 4 6 8 (hPa) BG 5157 BEN / C (2017-07) PKR 261... - Page 26 These conversion factors are average values. Caution A mixture of gases and vapors is often involved. In this case, accurate determination is only possible with a partial pressure measurement instrument, e.g. a quadrupole mass spectrometer. BG 5157 BEN / C (2017-07) PKR 261...
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Page 27: Etl Certification
ETL Certification RECOGNIZED ETL LISTED COMPONENT The product PKR 261 • conforms to the UL Standard UL 61010-1 • is certified to the CAN/CSA Standard C22.2 No. 61010-1 3103457 BG 5157 BEN / C (2017-07) PKR 261... - Page 28 VACUUM SOLUTIONS FROM A SINGLE SOURCE Pfeiffer Vacuum stands for innovative and custom vacuum solutions worldwide, technological perfection, competent advice and reliable service. COMPLETE RANGE OF PRODUCTS From a single component to complex systems: We are the only supplier of vacuum technology that provides a complete product portfolio.
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