Summary of Contents for Bergoz NPCT-CF2"1/8-22.2-120-UHV
- Page 1 USER MANUAL NPCT New Parametric Current Transformer Rev. 3.0 More than 40 years of experience recognized in the world of particle accelerators...
- Page 2 NPCT User Manual Version 3.0 Record of updates Version Date Updates performed 03/2018 Review of the full manual. Obsoletes all former releases 12/2019 Modification of the cover page and creation of the distributors’ page 05/2021 Update of the “NPCT cassette front panel” picture Update of the “Installation over vacuum chamber”...
- Page 3 NPCT User Manual Version 3.0 DISTRIBUTORS U.S.A. Japan GMW Associates Hayashi-Repic Co., Ltd. www.gmw.com www.h-repic.co.jp sales@gmw.com sales@h-repic.co.jp India China GEEBEE International Beijing Conveyi Limited www.geebeeinternational.com www.conveyi.com info@geebeeinternational.com sales@conveyi.com South Korea Seyoung Co., Ltd www.seyoungsys.com apark@seyoungsys.com...
- Page 4 NPCT User Manual Version 3.0...
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Page 5: Table Of Contents
NPCT User Manual Version 3.0 TABLE OF CONTENTS INITIAL INSPECTION ....................... 3 WARRANTY ..........................3 ASSISTANCE ........................... 3 SERVICE PROCEDURE ......................3 RETURN PROCEDURE ......................4 SAFETY INSTRUCTIONS ......................4 LEGAL RIGHTS ........................5 NPCT SET ..........................6 Front view ..........................6 Rear view.......................... - Page 6 NPCT User Manual Version 3.0 DB15-DB15 interconnect cable pins allocation ..............22 SPECIFICATIONS ........................23 MAKING PRECISE MEASUREMENTS WITH NPCT ............... 25 The Challenge ........................25 RF Rejection ........................25 EMI Rejection ........................25 Grounding scheme ......................26 Output readout ........................27 Readout software ......................
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Page 7: Initial Inspection
Bergoz Instrumentation or its local distributor before return of goods. Bergoz Instrumentation will repair or replace any product under warranty at no charge. For products in need of repair after the warranty period, Bergoz Instrumentation will assess the technical issue and send a quote to the purchaser/customer. The purchaser/customer must provide a purchase order before repairs can be initiated. -
Page 8: Return Procedure
The return of this repaired product under warranty back to the customer is paid by Bergoz Instrumentation. Return of product out of warranty should be made prepaid or will be invoiced. Bergoz Instrumentation will not accept freight-collect shipments. Shipments should be made via UPS, FedEx or DHL. -
Page 9: Legal Rights
The Parametric Current Transformer was developed by Dipl. Ing. Klaus B. Unser of the LEP Division at CERN in the framework of the Collaboration Agreement N° K017/LEP between CERN and BERGOZ. This agreement grants Bergoz Instrumentation the right to commercialize the resulting technology. -
Page 10: Npct Set
Check the line voltage range marked at the rear of the output chassis. Make sure your mains voltage falls within the range. If it does not, do not connect the NPCT to the mains power supply, but ask for advice from Bergoz Instrumentation or its distributor. Page 6... -
Page 11: Active And Spare Modules
NPCT User Manual Version 3.0 Active and spare modules When an NPCT module is damaged –NPCT cassette or power supply– switch off the mains power, remove the damaged unit, then insert the spare unit in the active slot. Spare NPCT cassette in non-powered slot Active NPCT cassette in powered slot Spare power supply, not connected Active power supply, connected... -
Page 12: General Description
100°C (212°F) should never be exceeded at any time during bake out or operation. Unlike other Bergoz Instrumentation’s In-flange current transformers FCT, ICT, ACCT and CWCT which can – on option – be baked at 150°C (300°F) or 185°C (365°F), this is not the case of In-flange NPCT. - Page 13 NPCT User Manual Version 3.0 In-flange NPCT wall current break (“gap”) is a ceramic ring (Al 99.7%) brazed onto two Kovar transition sleeves. Standard models are made from AISI 304 steel, AISI 316LN is available on option. In-flange models have the below syntax: In-flange NPCT -CFx”- x”...
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Page 14: In-Air Models
NPCT User Manual Version 3.0 In-air models In-air models are current transformers whose core(s) are potted in a toroidal casing. In-air NPCT are typically installed over a vacuum chamber whose wall current flow is interrupted by a user-supplied break (“gap”) protected from stress by bellows. The wall current is diverted by a user-supplied wall current bypass. -
Page 15: Mechanical Dimensions And Drawings
NPCT User Manual Version 3.0 MECHANICAL DIMENSIONS AND DRAWINGS In-flange models Flange OD Pipe OD In-flange NPCT sensor NPCT ID NPCT H (inch) (inch) order code (mm) (mm) 2.125” NPCT-CF2"1/8-22.2-120-UHV- 1" 22.2 2.75” NPCT-CF2"3/4-34.9-120-UHV- 1.5" 34.9 3.375” NPCT-CF3"3/8-38.0-120-UHV- 40 mm 38.0 4.5”... -
Page 16: In-Air Models
NPCT-195- NPCT-202- NPCT-245- Drawings Drawings in .pdf can be found on our website: www.bergoz.com :: Products :: NPCT :: Downloads :: Technical drawings Dimensions missing on the website can be obtained asking info@bergoz.com Electronics chassis Height: 3U (DIN norms) Width: 19"... -
Page 17: Sensor Connector
NPCT User Manual Version 3.0 SENSOR CONNECTOR DB15 sensor connector dimensions must be taken into consideration when designing the sensor installation and shield: In-flange models "Standard" sensors which order code does not include "-H" suffix, are equipped with a DB15 male connector affixed to the outer side of the sensor head. -
Page 18: Quick Check
NPCT User Manual Version 3.0 QUICK CHECK Checking NPCT operation The following steps are intended to make the user familiar with the NPCT operation and behaviour before it is installed in its final place. A DC current source or function generator, and a voltmeter or oscilloscope are the only instruments required for the Quick Check: NPCT Power... -
Page 19: Npct Cassette Front Panel
NPCT User Manual Version 3.0 NPCT cassette front panel bergoz Instrumentation New PCT Power ON LED Zero offset adjustment Zero Adjust Output +-10V, 20 mA max. Output polarity: An arrow printed of the sensor side shows the direction of OUTPUT... -
Page 20: Npct Rear Panel And Controls
NPCT User Manual Version 3.0 NPCT Rear panel and Controls DB15 connector to sensor head Rear output, +-10V, 20mA max Sensor head bergoz OUTPUT Instrumentation 20mA max Calibration input ± 2A max Controls Sensor multiplies current by 10 98...265 V Order code NPCT-RFC Rear panel shown truncated. -
Page 21: All Ranges Check
NPCT User Manual Version 3.0 When NPCT sensor head is connected to the electronics, connect the chassis to the mains. Connect a voltmeter, oscilloscope or low-frequency spectrum analyzer to "Output", on the front panel or rear panel. Then, with a current source or a function generator, enter a signal into the front panel or rear panel "Calibration input". -
Page 22: Functional Test
NPCT User Manual Version 3.0 Functional test NPCT elementary functions can be tested. To test them, a +100mA test signal can be fed into the sensor head. The test signal is normally inactive (default state). It can be activated by grounding pin 2 of the DB9 rear panel Controls connector: TEST Pin 2... -
Page 23: Controls
NPCT User Manual Version 3.0 CONTROLS NPCT is controlled by TTL levels. There are no manual controls (switches). Controls are entered through Rear panel Controls DB9 connector. Two functions can be controlled: • Ranges: ±20A, ±2A, ±200mA and ±20mA. Default range is ±20A •... -
Page 24: Interconnect Cable And Pairs Allocation
NPCT User Manual Version 3.0 INTERCONNECT CABLE AND PAIRS ALLOCATION Radiation-tolerant cable NPCT radiation-tolerant cable 5719/A is used to assemble the radiation-tolerant interconnect cable RHCXXX. It is also used on in-air NPCT radiation-tolerant sensor where it is molded in the sensor toroid. Page 20... -
Page 25: Standard Cable
NPCT User Manual Version 3.0 Standard cable NPCT interconnect cable NPCT-CXXX are assembled using Belden 9508NH multicore cable. The main characteristics of the Belden 9508NH cable are indicated below. They were extracted from the Belden 9508NH datasheet: https://catalog.belden.com/techdata/EN/9508NH_techdata.pdf Product Description: 8-Pair, 24 AWG stranded (7x32) TC conductors, PE insulation, twisted pairs, overall Beldfoil shield (100% coverage), 24 AWG stranded TC drain Wire, LSZH jacket,... -
Page 26: Db15-Db15 Interconnect Cable Pins Allocation
NPCT User Manual Version 3.0 DB15-DB15 interconnect cable pins allocation Signals DIN41612D DB15 Pair Belden 9508NH Modulator sense White P1 Modulator sense• Red P1 Excitation• Black P2 Excitation• White P2 Feedback2 Black P3 Feedback2• Blue P3 Feedback200 Black P4 Feedback200• Green P4 Monitoring Black P5... -
Page 27: Specifications
NPCT User Manual Version 3.0 SPECIFICATIONS Full scale ranges -20 mA...+20 mA -200 mA...+200 mA -2 A... +2 A -20 A... +20 A Range control 2 TTL lines on rear panel “controls” DB9 Output nominal -10 V... +10 V, proportional to full scale current Output over range up to ±12V Noise/resolution (typical) - Page 28 NPCT User Manual Version 3.0 Sensor connector On standard sensor: DB15 male on sensor On radiation-resistant sensor: 3-meter sensor cable, DB15 male terminated, attached to sensor On chassis rear panel: DB15 female Sensor cable 8-pair multicore DB15/DB15 cable, 8.39-mm outer diameter, 83-mm minimum bending radius, radiation-resistant, flame retardant, low-smoke, halogen-free.
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Page 29: Making Precise Measurements With Npct
In-air sensors installation over the vacuum chamber must be such that resonances are prevented. Users are responsible for resonances occurring in their In-air sensor installation. Installation blueprints can be sent to Bergoz Instrumentation for evaluation prior to installation. RF Rejection The NPCT system is generally protected against RF interference at every stage of the circuit. -
Page 30: Grounding Scheme
NPCT User Manual Version 3.0 EMI rejection by common-mode filters can exceed -40dB on a methodically executed installation. Noise conducted by the vacuum chamber surface may cover a wide spectrum from AC 50/60Hz to several MHz; this noise must be treated like EMI-collected noise, by common- mode filters on every cable segment. -
Page 31: Output Readout
NPCT User Manual Version 3.0 Output readout NPCT output is a high-impedance signal, with output source/sink capability limited to 20mA. Exceeding 20mA (e.g., loading the NPCT output with 50 ohms) may damage the NPCT output buffer. The type of Readout instrument to be used depends on the user's requirements: •... -
Page 32: Readout Circuit Noise Rejection
NPCT User Manual Version 3.0 Readout circuit noise rejection The readout instrument input should be high-impedance. Therefore, noise can be collected through EMI and RFI may be demodulated by the readout instrument. These interferences can be significantly reduced or eliminated using common-mode filters. Simple common- mode filters can be made by passing the signal cable (twisted pair or coaxial) through a ferrite core. -
Page 33: In-Flange Npct Installation In The Accelerator Beam Line
NPCT User Manual Version 3.0 IN-FLANGE NPCT INSTALLATION IN THE ACCELERATOR BEAM LINE Usual procedures pertinent to the vacuum pressure objective must be applied. Install NPCT sensor as far as possible from magnetic stray fields sources. Avoid, when possible, proximity of RF ducts. In-flange NPCT bolts must be tighten at the recommended torque according to the flange type, but not beyond. -
Page 34: Wall Current Break Or "Gap
NPCT User Manual Version 3.0 Wall current bypass = -I Wall current Beam Transformer Ceramic gap Wall current break or “gap” When installing an In-air NPCT over a vacuum chamber, an electrical break or “gap” must be installed in order to stop the wall current induced by the beam. If vacuum pressure is 1e-7 mbar or above, a polymer gasket O-ring can be used between two flanges to assure the desired electrical isolation. -
Page 35: Keeping High Harmonics Of The Beam Out Of The In-Air Npct Cavity
NPCT User Manual Version 3.0 Keeping high harmonics of the beam out of the In-air NPCT cavity Wall current break, wall current bypass and RF shield form together a cavity. The NPCT sensor is placed inside this cavity. The beam current flows through the vacuum chamber. Its electromagnetic fields induce a wall current in the conductive vacuum chamber walls. -
Page 36: What Could (And Would) Go Wrong
Demagnetizing the Toroid sensor Sensor demagnetization is automatic when AC mains is applied to the instrument, provided the saturation is not too deep. In case of deep saturation, contact your distributor or Bergoz Instrumentation for instructions. Shorting the Toroid sensor The NPCT sensor must not be shorted. -
Page 37: Ionizing Radiations
NPCT User Manual Version 3.0 Ionizing radiations The NPCT chassis must not be exposed to ionizing radiations. Doses as small as 10 may damage the MOS components used. Yet, NPCT-E electronics does not use high-density digital circuits, thus SEUs are avoided. The NPCT sensor contains materials which can be activated by high energy particles, particularly, the sensor contains large quantities of cobalt and iron. -
Page 38: Npct Radiation Tolerance
NPCT User Manual Version 3.0 NPCT RADIATION TOLERANCE NPCTs contain materials which may be damaged by ionizing radiations. They are listed hereafter: Organic and radiation-sensitive materials used in the "Standard" sensor The "Standard" sensor is supplied when the "Rad-Tolerant" option is not ordered. Component Material Radiation... - Page 39 If you have any questions, feel free to contact us by e-mail info@bergoz.com Bergoz Instrumentation – 156, rue du Mont Rond – Espace Allondon Ouest – 01630 SAINT GENIS POUILLY – France Tél. : +33 (0) 459 42 66 42 Fax : +33 (0) 450 42 66 43 – bergoz@bergoz.com www.bergoz.com...
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