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Fluidcontrol
Level switch for external mounting
NS 25 AM-Atex
Installation and Operation Instructions
Original instructions
BE200005
Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
10/2020
Tel. +49 (0) 21 02 / 49 89-0, Fax: +49 (0) 21 02 / 49 89-20
E-Mail: fluidcontrol@buehler-technologies.com
Internet: www.buehler-technologies.com
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Table of Contents
Related Manuals for Buhler NS 25 AM-Atex
Summary of Contents for Buhler NS 25 AM-Atex
- Page 1 Fluidcontrol Level switch for external mounting NS 25 AM-Atex Installation and Operation Instructions Original instructions BE200005 Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen 10/2020 Tel. +49 (0) 21 02 / 49 89-0, Fax: +49 (0) 21 02 / 49 89-20 E-Mail: fluidcontrol@buehler-technologies.com...
- Page 2 Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen Tel. +49 (0) 21 02 / 49 89-0, Fax: +49 (0) 21 02 / 49 89-20 Internet: www.buehler-technologies.com E-Mail: fluidcontrol@buehler-technologies.com Read this instruction carefully prior to installation and/or use. Pay at- tention particularly to all advises and safety instructions to prevent in- juries.
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Page 3: Table Of Contents
NS 25 AM-Atex Contents Introduction............................................. 2 Intended Use......................................... 2 Product Description...................................... 2 Scope of Delivery........................................ 2 Ordering Instructions...................................... 2 Type plate .......................................... 2 Safety instructions......................................... 3 Important advice ......................................... 3 General hazard warnings .................................... 4 Transport and storage ........................................ 5 4 Installation and connection ...................................... 6 Installation .......................................... 6... -
Page 4: Introduction
NS 25 AM-Atex 1 Introduction 1.1 Intended Use According to EN 60079-11, the NS 25 AM-Atex series level switch is a simple electrical apparatus without separate voltage source intended for tank-top installation. With intrinsically safe connection, the level switch may be installed in explosive areas zone 1 and zone 2 (group IIB). It is used to monitor the level inside a tank. -
Page 5: Safety Instructions
NS 25 AM-Atex 2 Safety instructions 2.1 Important advice This unit may only be used if: – The product is being used under the conditions described in the operating- and system instructions, used according to the nameplate and for applications for which it is intended. Any unauthorized modifications of the device will void the warranty provided by Bühler Technologies GmbH,... -
Page 6: General Hazard Warnings
NS 25 AM-Atex 2.2 General hazard warnings The equipment must be installed by a professional familiar with the safety requirements and risks. Be sure to observe the safety regulations and generally applicable rules of technology relevant for the installation site. Prevent malfunctions and avoid personal injuries and property damage. -
Page 7: Transport And Storage
NS 25 AM-Atex 3 Transport and storage Only transport the product inside the original packaging or a suitable alternative. The equipment must be protected from moisture and heat when not in use. They must be stored in a covered, dry, vibration- and dust-free location at a temperature between -20 °C to +60 °C. -
Page 8: Installation And Connection
NS 25 AM-Atex 4 Installation and connection 4.1 Installation The level switch mounts to the outside of the tank with the flanges. Ensure all seals are large enough to prevent cross-section constriction in the connection fitting. All screws must be tightened to the same torque. The float is preinstalled in the level switch. -
Page 9: Pa Connection (Potential Equalisation)
NS 25 AM-Atex 4.2.2 PA connection (potential equalisation) CAUTION Electrostatic charge Level switch housings must be connected to the tank via external PA connection! Ensure the level switch is adequately earthed (minimum conductor cross-section 4 mm Please also particularly observe the requirements of EN 60079-14. -
Page 10: Information On The Correct Operation Of Reed Contacts In Bühler Level Switches
NS 25 AM-Atex 4.3 Information on the correct operation of reed contacts in Bühler level switches Based on their construction, reed contacts are very long lasting and reliable components. Yet the following should be considered when using them: Life of reed switches The life of reed switches can be up to 10 cycles. -
Page 11: Operation And Control
NS 25 AM-Atex 5 Operation and control DANGER Toxic, acidic gases/liquids Protect yourself from toxic, corrosive gasses/liquids when performing any type of work. Wear appropriate protective equipment. DANGER Dangerous electrostatic charge (explosion hazard) The equipment may only be used where normal operating conditions do not produce frequent flammable, electrostatic discharge. - Page 12 NS 25 AM-Atex Before startup, check – The electrical connections are undamaged and correctly installed, – The temperature switch/sensor is connected intrinsically-safe (proof of intrinsic safety e.g. according to EN 60079-14), – No parts have been removed from the temperature switch/sensor, –...
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Page 13: Cleaning And Maintenance
NS 25 AM-Atex 6 Cleaning and Maintenance During maintenance, remember: – The equipment must be maintained by a professional familiar with the safety requirements and risks. – Only perform maintenance work described in these operating and installation instructions. – When performing maintenance of any type, observe the respective safety and operation regulations. -
Page 14: Service And Repair
NS 25 AM-Atex 7 Service and repair This chapter contains information on troubleshooting and correction should an error occur during operation. Repairs to the unit must be performed by Bühler authorised personnel. Please contact our Service Department with any questions: Tel.: +49-(0)2102-498955 or your agent... -
Page 15: Disposal
NS 25 AM-Atex 8 Disposal Dispose of parts so as not to endanger the health or environment. Follow the laws in the country of use for disposing of elec- tronic components and devices during disposal. BE200005 ◦ 10/2020 Bühler Technologies GmbH... -
Page 16: Appendices
NS 25 AM-Atex 9 Appendices 9.1 Technical Data Technical Data Dimensions Max. operating pressure 25 bar Ambient temperature: -20 °C to +100 °C spec. fluid weight for float SK ≥ 0.85 kg/dm³ Material Float SK661 1.4571 Riser 1.4571 Flanges S355 galvanised... -
Page 17: Contacts
NS 25 AM-Atex 9.2 Contacts Model MKS-1/K MKS-2/K MKS-1/W Contact type (bi-stable) NC contact/NO contact NC contact/NO contact NO contact Connector 3-pin + PE 6-pin + PE 3-pin + PE DIN 43650 (M3) DIN 43651 (S6) DIN 43650 (M3) IP rating... -
Page 18: Attached Documents
NS 25 AM-Atex 10 Attached documents – Manufacturer declaration: HX200001 – RMA - Decontamination Statement Bühler Technologies GmbH BE200005 ◦ 10/2020... - Page 20 RMA-Formular und Erklärung über Dekontaminierung RMA-Form and explanation for decontamination RMA-Nr./ RMA-No. Die RMA-Nummer bekommen Sie von Ihrem Ansprechpartner im Vertrieb oder Service./ You may obtain the RMA number from your sales or service representative. Zu diesem Rücksendeschein gehört eine Dekontaminierungserklärung. Die gesetzlichen Vorschriften schreiben vor, dass Sie uns diese Dekontaminierungserklärung ausgefüllt und unterschrieben zurücksenden müssen.
- Page 21 Dekontaminierungserklärung DE000011 Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen 01/2019 Tel. +49 (0) 21 02 / 49 89-0, Fax: +49 (0) 21 02 / 49 89-20 E-Mail: service@buehler-technologies.com Internet: www.buehler-technologies.com...
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