KROHNE VA40 Supplementary Instructions Manual
Variable area flowmeter
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- Handbook (36 pages) ,
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- Supplementary instructions manual (28 pages)
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Summary of Contents for KROHNE VA40
- Page 1 VA40 VA40 VA40 VA40 Supplementary Instructions Supplementary Instructions Supplementary Instructions Supplementary Instructions Variable area flowmeter Equipment protection level Gb in protection type intrinsic safety "i" © KROHNE 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en...
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Page 2: Table Of Contents
4.2 Grounding and equipotential bonding................13 5 Operation 5.1 Start-up........................... 14 5.2 Operation ........................14 5.3 Electrostatic charge ....................... 14 6 Service 6.1 Maintenance ........................16 6.2 Dismantling ........................16 7 Notes www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en... -
Page 3: Safety Instructions
This applies in particular to the use of easily detachable process connections when measuring flammable media. CAUTION! When an equipment fault is detected the device shall be de-energised and send back to the manufacturer for repair. 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... -
Page 4: Device Description
Limit switch Limit switch without - limit switch with cable tail A - limit switch with connection box (standard) * positions which are not needed are omitted (no blank positions) www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en... -
Page 5: Marking
Figure 2-5: Example of marking of limit switch TG21 1 Device type 2 Manufacturer 3 Electrical connection data 4 Built-in equipment 5 Note to observe the documentation, disposal and China RoHs 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... - Page 6 6 Note to observe the documentation No Ex marking for MS14 and MS14/A, because the Reed limit switch operates as a simple device and complies to intrinsic safety EN 60079-11, paragraph 5.7. www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en...
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Page 7: Flammable Products
An area in which an explosive atmosphere, as a result of the mixture of flammable substances in the form of gas, steam or mist with air, under normal operation may occasionally occur. 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... -
Page 8: Types Of Protection
For the equipment category II 2 G or EPL Gb, connection to an intrinsically safe circuit with protection level "ib" is required. When connecting the variable area flowmeter to an intrinsically safe circuit with protection level "ia", a higher protection level is given. www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en... -
Page 9: Ambient Temperature / Temperature Classes
These values may be limited by the information contained in the standard manual. The maximum values listed in the manual must be taken into consideration. Minimum product temperature for all versions The minimum product temperature is -20°C / -4°F. 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... -
Page 10: Electrical Data
Also, when operating the variable area flowmeter outside of the hazardous area, the connection must be made to intrinsically safe circuits. When connecting to non-intrinsically safe circuits, there is a risk of damage to the safety- defining components. www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en... -
Page 11: Installation
Mounting of limit switches Mounting the limit switches ensures the electrostatic connection to the indicator. Make sure that they are properly mounted and that the mounting elements fit properly. 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... -
Page 12: Special Conditions
INSTALLATION VA40 3.2 Special conditions Equipotential bonding The variable area flowmeters type VA40/./ .. /K/ must be connected to the equipotential bonding system of the hazardous area. For further information refer to Grounding and equipotential bonding on page 13. Flammable products In case of operation with flammable products the measuring units must be included in the periodic tests of the pipelines and fittings. -
Page 13: Electrical Connections
1 on the back rail is shown below. This connection only ensures electrostatic grounding of the device and does not meet the requirements for equipotential bonding. Figure 4-1: Grounding and equipotential bonding 1 Grounding connection 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... -
Page 14: Operation
• pneumatically conveyed dust is exposed. To minimise danger due to electrostatic discharge, the variable area flowmeters type VA40/./ .. /K/ may not be used in areas in which there are processes that generate strong charges. In variable area flowmeters, it is possible under field conditions for charge separation to occur in the measuring tube due to the transport of non-conductive fluids and/or when the flow comes into contact with non-conductive built-ins. - Page 15 The conductivity of liquids must be at least 1000 pS/m. Gases containing solid particles or liquid droplets are not permitted. WARNING! Electrostatic charging of the housing surface by friction must be avoided. The devices must not be dry cleaned. 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com...
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Page 16: Service
In the case of environmentally critical or hazardous products, appropriate safety precautions • must be taken with regard to residual liquids in the measuring unit. New gaskets have to be used when re-installing the device in the piping. • www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en... -
Page 17: Notes
NOTES VA40 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com... - Page 18 NOTES VA40 www.krohne.com 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en...
- Page 19 NOTES VA40 10/2020 - 4002262403 - AD VA40 Exia Gb R04 en www.krohne.com...
- Page 20 Engineering, commissioning, calibration, maintenance and training services Head Office KROHNE Messtechnik GmbH Ludwig-Krohne-Str. 5 47058 Duisburg (Germany) Tel.: +49 203 301 0 Fax: +49 203 301 10389 info@krohne.com The current list of all KROHNE contacts and addresses can be found at: www.krohne.com...
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