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Fluidcontrol
Level- and temperature switch
Nivotemp NT 64D, Nivovent NV 74D
Installation and Operation Instructions
Original instructions
BE100018
Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
12/2019
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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Summary of Contents for Bühler technologies Nivotemp NT 64D
- Page 1 Fluidcontrol Level- and temperature switch Nivotemp NT 64D, Nivovent NV 74D Installation and Operation Instructions Original instructions BE100018 Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen 12/2019 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
Nivotemp NT 64D, Nivovent NV 74D Contents Introduction............................................. 3 Intended Use......................................... 3 Functionality......................................... 3 1.2.1 Liquid level monitoring .................................. 3 1.2.2 Temperature monitor .................................. 3 Design types.......................................... 3 Model key NT64D......................................... 4 Model key NV74D......................................... 4 Scope of Delivery........................................ 4 Safety instructions......................................... 5 Important advice ......................................... 5 General hazard warnings .................................... 6... - Page 4 Nivotemp NT 64D, Nivovent NV 74D Spare parts and accessories ................................... 30 8 Disposal ............................................ 31 9 Appendices............................................. 32 Technical Data NT 64D..................................... 32 Technical Data NV 74D..................................... 34 Dimensions NV 74D ...................................... 36 Standard pin assignment NT 64D ................................ 37 Standard pin assignment NV 74D ................................ 38 Current settings......................................... 39...
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Page 5: Introduction
Nivotemp NT 64D, Nivovent NV 74D 1 Introduction 1.1 Intended Use Level switches are used to monitor the liquid level and temperature in fluid systems. Level switches must not be used in highly flammable or corrosive liquids. The medium must not contain particles, particularly metallic particles, to prevent deposits on the float or between the float and switching tube. -
Page 6: Model Key Nt64D
Nivotemp NT 64D, Nivovent NV 74D 1.4 Model key NT64D - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 7: Safety Instructions
Nivotemp NT 64D, Nivovent NV 74D 2 Safety instructions 2.1 Important advice Operation of the device is only valid if: – the product is used under the conditions described in the installation- and operation instruction, the intended application according to the type plate and the intended use. In case of unauthorized modifications done by the user Bühler Technolo- gies GmbH can not be held responsible for any damage, –... -
Page 8: General Hazard Warnings
Nivotemp NT 64D, Nivovent NV 74D 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 9: Transport And Storage
Nivotemp NT 64D, Nivovent NV 74D 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. It must be stored in a covered, dry, dust-free room at room temperature. -
Page 10: Setup And Connection
Nivotemp NT 64D, Nivovent NV 74D 4 Setup and connection DANGER Electric voltage Risk of electric shock a) Always disconnect the unit from the mains before performing work. b) Secure the equipment from accidental restarting. c) The equipment may only be installed, maintained and put into operation by instruc- ted, competent personnel. -
Page 11: Electrical Connections
Nivotemp NT 64D, Nivovent NV 74D 4.2 Electrical connections Electricity is supplied via plug connectors. Please refer to the appendix for installation dimensions, nominal voltage and plug configuration. The temperature switching outputs are PNP transistors (see illustration): Supply voltage Note: When measuring the switching output with high-load measuring device inputs or when used as a frequency output, the load must be set to 10 kΩ... -
Page 12: Adjusting The Level Contacts
Nivotemp NT 64D, Nivovent NV 74D Contact material All reed switches in Bühler level contacts use rhodium as the contact material for the actual contact areas. Magnetic fields Avoid external magnetic fields, including from electric motors. These can interfere with the function of the reed switches. - Page 13 Nivotemp NT 64D, Nivovent NV 74D NT64D: – Disconnect the voltage supply. – Disconnect the plug. – Unscrew the display housing with base and carefully pull out the top along with the adapter plug and the contact strip. – Loosen and reposition the plastic screws on the contacts (cm scale on the back of the contact strip). Minimum spacing: 40 mm (1.6").
- Page 14 Nivotemp NT 64D, Nivovent NV 74D NV74D: – Disconnect the voltage supply. – Unscrew the filter cover and remove the filter element. – Loosen the mounting screws and remove the filter case. – Loosen the screws for the flange cover and remove the cover with cover seal.
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Page 15: Operation And Control
Nivotemp NT 64D, Nivovent NV 74D 5 Operation and control NOTICE The device must not be operated beyond its specifications. 5.1 Start-up procedure The device will automatically switch on when connected to power. It will first briefly display the software version, at which time the device will also check the built-in components. -
Page 16: General Key Functions
Nivotemp NT 64D, Nivovent NV 74D 5.3 General key functions The keys below the display are used for operation. The menu controls are detailed in the following chapters. Mode Function – Measurement display: Change measured variables displayed. – In the menu: Move down one menu level. -
Page 17: Menu Overview
Nivotemp NT 64D, Nivovent NV 74D 5.5 Menu overview The menu structure is based on the VDMA standard sheet 24574-1. The menu structure is hierarchic. The top menu level contains the main menu items, e.g. tEMP, F, diA, E. Each main menu has additional submenu items. -
Page 18: Changing Basic Settings
Nivotemp NT 64D, Nivovent NV 74D 5.6 Changing basic settings The general basic settings can be changed under menu Basic Settings Extended Functions (bEF). These settings will affect the measurement display and the configuration options in the various main menus. Here you can also change the switching output assignment. -
Page 19: Set Temperature Unit
Nivotemp NT 64D, Nivovent NV 74D 5.6.3 Set temperature unit This is where the unit symbol for the temperature is configured: t. u ni Selection menu Basic EF b. E F Set Unit Temp Basic Adv. Functions Temperature unit ; C - ; F... -
Page 20: Restore Factory Settings (Reset)
Nivotemp NT 64D, Nivovent NV 74D 5.6.6 Restore factory settings (Reset) Use the Reset function (rES) to restore the factory settings. All changes will be lost. Since this will also reset the limits, you must check the temperature settings. b. E F... -
Page 21: Switching Outputs
Nivotemp NT 64D, Nivovent NV 74D Version with 4 switching outputs: Switching outputs Version with analogue output: Analogue output A1. H i A1. L o A. o u1 Diagnostic settings: Diagnostics SJ. o u out1 dt. M M 0. 0 5.7 Switching outputs... -
Page 22: Switching Output X: Definition Of The Switching Characteristic
Nivotemp NT 64D, Nivovent NV 74D 5.7.1 Switching output x: Definition of the switching characteristic The switching characteristic for the output can be configured under the following menu: ____ Measured variable Out X out_ EF X Set Out X Selection menu... -
Page 23: Switching Output X: Upper Switching Limit (Switching Point)
Nivotemp NT 64D, Nivovent NV 74D Note: The designation of the switching function may vary: Measured variable closed open closed open rising NO contact rising NC contact falling NC contact falling NO contact NO (normally open) NC (normally closed) 5.7.2 Switching output x: Upper switching limit (switching point) -
Page 24: Switching Output X: Switch-On Delay
Nivotemp NT 64D, Nivovent NV 74D 5.7.4 Switching output x: Switch-on delay The menu Advanced Functions is used to configure additional settings for switching output x. The submenu is at the second submenu level. The switching and switch-back delay prevents the alarm being triggered too frequently in unstable conditions. The switching... -
Page 25: Change Status Led Display Function
Nivotemp NT 64D, Nivovent NV 74D 5.7.7 Change status LED display function The LEDs in the display indicate the switching status of the output. The following table shows how LEDs are allocated to the switching output: Numbering Switching Assignment for... -
Page 26: Analogue Outputs
Nivotemp NT 64D, Nivovent NV 74D ____ Out X out_ EF X LEd_ Selection menu L=__ Measured variable LED Out X Settings menu OUTX Advanced Functions Function status LEDX L= o - L=_o Measured variable main menu The options are: LED = output;... -
Page 27: Analogue Output X: Testing The Analogue Output
Nivotemp NT 64D, Nivovent NV 74D 5.8.4 Analogue output x: Testing the analogue output The analogue output can be tested. The highest, mean and lowest analogue value can be output successively. This is configured in menu: ____ Analog OutX Check AnX C. -
Page 28: Maximum And Minimum Temperature
Nivotemp NT 64D, Nivovent NV 74D The information displayed will alternate between the index and time for entry x, e.g. Jor1 ⇔ 1. 4 h for the most recent event 1.4 hours ago. Press the key to return to the submenu or use to select the next journal entry. -
Page 29: Delay For Storing The Min/Max Temperature
Nivotemp NT 64D, Nivovent NV 74D 5.9.4 Delay for storing the Min/Max Temperature A delay time for saving the minimum and maximum temperature can be set to record reliable values when temperatures fluc- tuate. Here, enter the time span in seconds during which the signal must be continuously present before the temperature is logged. -
Page 30: Cleaning And Maintenance
Nivotemp NT 64D, Nivovent NV 74D 6 Cleaning and Maintenance This device is maintenance-free. The method for cleaning the devices must be adapted to the IP protection class of the devices. Do not use cleaners which could damage the device materials. -
Page 31: Service And Repair
Nivotemp NT 64D, Nivovent NV 74D 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 32: Spare Parts And Accessories
Nivotemp NT 64D, Nivovent NV 74D 7.2 Spare parts and accessories Accessories Item no. 4-pin Item no. 8-pin Description 9144 05 0010 9144 05 0048 Connecting cable M12x1, 1.5 m, angular coupling and straight plug 9144 05 0046 9144 05 0049 Connecting cable M12x1, 3.0 m, angular coupling and straight plug... -
Page 33: Disposal
Nivotemp NT 64D, Nivovent NV 74D 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. BE100018 ◦ 12/2019... -
Page 34: Appendices
Nivotemp NT 64D, Nivovent NV 74D 9 Appendices 9.1 Technical Data NT 64D Basic unit Version Basic model Operating pressure max. 1 bar max. 1 bar Operating temperature -20 °C to +80 °C -20 °C to +80 °C Float SK 610 SK 221 Min. - Page 35 Nivotemp NT 64D, Nivovent NV 74D Temperature outputs Choose from the following temperature outputs -1T-KT Plug (base) 2 x M12 – 4-pin 2 x M12 – 4-pin 1 x M12 – 4-pin 1 x M12 – 8-pin Switching outputs 2 x freely programmable*...
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Page 36: Technical Data Nv 74D
Nivotemp NT 64D, Nivovent NV 74D 9.2 Technical Data NV 74D Basic unit Version Operating pressure max. 1 bar max. 1 bar Operating temperature -20 °C to +80 °C -20 °C to +80 °C Float SK 610 SK 221 Min. fluid density 0.80 kg/dm³... - Page 37 Nivotemp NT 64D, Nivovent NV 74D Temperature outputs Choose from the following temperature outputs -1T-KT Plug (base) 2 x M12 – 4-pin 2 x M12 – 4-pin 1 x M12 – 4-pin 1 x M12 – 8-pin Switching outputs 2 x freely programmable*...
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Page 38: Dimensions Nv 74D
Nivotemp NT 64D, Nivovent NV 74D 9.3 Dimensions NV 74D Basic version With options Contamination indicator seal Display and seal control unit Filling adapter GI cork 1st contact. Ø90 seal GI cork seal 1st contact Stilling tube with centring disc and filling adapter Ø44... -
Page 39: Standard Pin Assignment Nt 64D
Nivotemp NT 64D, Nivovent NV 74D 9.4 Standard pin assignment NT 64D Plug connection 2 x M12 (base) Panel plug Connection schematic Plug A Plug B (level) (Temperature) 2 x temperature output +24V DC S2 (PNP) S1 (PNP) 1T-KT 1 x Temperature output... -
Page 40: Standard Pin Assignment Nv 74D
Nivotemp NT 64D, Nivovent NV 74D 9.5 Standard pin assignment NV 74D Plug connection 2 x M12 (base) Connection schematic Plug A Plug B (level) (temperature) 2 x temperature output +24 V DC +24 V DC S2 (PNP) T1 (PNP) -
Page 41: Current Settings
Nivotemp NT 64D, Nivovent NV 74D 9.6 Current settings Switching outputs Basic Settings Diagnostics o. u ni SJ. o u t. u ni dt. M M o. H i o. L o r. o u1 r. o u2 r. o u3 r. - Page 42 Nivotemp NT 64D, Nivovent NV 74D none (non2) (2 fixed-point numbers) Range x Resolution x < 5 0.01 5 <= x < 10 0.02 10 <= x < 20 0.05 20 <= x < 50 50 <= x < 100 100 <= x...
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Page 43: Menu Sequence Overview
Nivotemp NT 64D, Nivovent NV 74D 9.9 Menu Sequence Overview Main menu Submenu 1 Submenu 2 Submenu 3 Settings and Display Menu Configuration t___ Shortcut Equipment configuration or 60s no action: Exit main/submenu ____ ____ Display Switch ____ ____ Switches the measurement display level/temperature... -
Page 44: Attached Documents
Nivotemp NT 64D, Nivovent NV 74D 10 Attached documents – Declaration of conformity: KX100020 – RMA - Decontamination Statement Bühler Technologies GmbH BE100018 ◦ 12/2019... - Page 45 EU-Konformitiitserkliirung EU-declaration of conformity Herewith declares Buhler Technologies GmbH Hiermit erkla.rt Buhler Technologies GmbH, that the following products correspond to the dass die nachfolgenden Produkte den essential requirements of Directive wesentlichen Anforderungen der Richtlinie 2014/30/EU (Elektromagnetische Vertraglichkeit / electromagnetic compatibility) in ihrer aktuellen Fassung entsprechen.
- Page 46 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 47 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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