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Summary of Contents for Mecon RE 250
- Page 1 Operating Instruction RE 250 Variable Area Flowmeter © MECON GmbH BA RE 250 EN 18-01...
- Page 2 All rights reserved. It is prohibited to reproduce this document, or any parts thereof, without prior written authorization of MECON GmbH. Subject to change without notice. Copyright 2018 by MECON GmbH - Röntgenstraße 105 - 50169 Kerpen - Germany Page 2 / 32 www.mecon.de BA RE 250 EN 18-01...
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Page 3: Table Of Contents
6 Description code _________________________________________________________ 17 7 Technical Data ___________________________________________________________ 21 7.1 Pressure limits vs. temperature stainless steel ___________________________________ 23 7.2 Dimensions and weights ____________________________________________________ 24 8 Electrical connections _____________________________________________________ 28 BA RE 250 EN 18-01 www.mecon.de Page 3 / 32... -
Page 4: Safety Instructions
1.1 Intended use Safety Instructions The series RE 250 of flowmeters with a standard length of 250 mm (9.84 inch) and a completely metal design is suitable for measuring different liquids and gases in closed piping. The robust design enables the operation in rough conditions. Different types of flanges, liners and float materials meet the requirements of the pharmaceutical and chemical industries. -
Page 5: Certifications
1.2 Certifications Safety Instructions CE marking The manufacturer certifies for the device RE 250 meets all statutory requirements of the following EU directives by applying the CE marking: • Pressure equipment directive 2014/68/EU 1.3 Safety instructions from the manufacturer •... -
Page 6: Start-Up
● possibility of shock pressure in the piping, e.g. due to rapid throttling or process shut-off ● turbulence, pulsations, etc. which could lead to vibrations of the flowmeter ● rapid pressure build-up in the piping Page 6 / 32 www.mecon.de BA RE 250 EN 18-01... -
Page 7: Device With Electrical Output (Mem)
● Move the pointer to the desired position. ● Tighten the screws to fix the pointer. 1 Limit pointer 2 Fixing screw Fig. 2 Adjustment of the switching point (limit switch) BA RE 250 EN 18-01 www.mecon.de Page 7 / 32... -
Page 8: Installation Mode Of Operation
The distance can be reduced by mounting the devices staggered by the length of one device. To eliminate doubt the influence can be tested by moving the instrument up and down Page 8 / 32 www.mecon.de BA RE 250 EN 18-01... - Page 9 ● Ensure that the operating pressure for the flowmeter corresponds to the calibration reference Tightening torques pressure to avoid erroneous measurements. The flange bolts for devices with PTFE liner may be tightened with the following torques (acc. guideline VDI/VDE 3513): BA RE 250 EN 18-01 www.mecon.de Page 9 / 32...
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Page 10: Operating Principle
This kind of filter is also recommended if such particles cannot be avoided in standard operation. Like other devices of this series the variable area flowmeter RE 250 operates according to the principle of flotation: The measuring unit consists of a metal tube with a measuring ring in which a float can move up and down. -
Page 11: Service
For a detailed inspection and cleaning the device must be removed from the piping. Caution! Appropriate safety precautions have to be taken when removing the device. Always use new gaskets when reinstalling the device in the piping. BA RE 250 EN 18-01 www.mecon.de Page 11 / 32... -
Page 12: Replacing Float
0.15 – 1.5 m³/h) cannot be done by the customer. The device has to be returned to the manufacturer. For details please refer to chapter “6.4 Returning the device to the manufacturer”. Page 12 / 32 www.mecon.de BA RE 250 EN 18-01... -
Page 13: Returning The Device To The Manufacturer
For reasons of environmental protection and safeguarding the health and safety of our personnel all devices sent to MECON GmbH to be repaired must be free of toxic and hazardous substances. This also applies to cavities of the devices. -
Page 14: Device Description
Standard device with display unit made of aluminium The measurement range is indicated directly on the scale. The equipment can be supplied with auxiliary electrical components and touch-sensitive switches for process monitoring and control. Page 14 / 32 www.mecon.de BA RE 250 EN 18-01... - Page 15 Fig. 8 Device with heating sheath For installations where temperature drops are unacceptable the devices are available with an external heating shield. BA RE 250 EN 18-01 www.mecon.de Page 15 / 32...
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Page 16: Nameplate
Please refer to the device nameplate to ensure that the device is built according to your order. Check particularly for the correct supply voltage. Fig. 9 Nameplate of the RE 250 Page 16 / 32 www.mecon.de BA RE 250 EN 18-01... -
Page 17: Description Code
DN 15 - DN 150 Form RF (ASME B16.5) ½ ” – 6 ” Form FF (ASME B16.5) ½ ” – 6 ” Form RTJ (ASME B16.5) 1 ” – 6 ” BA RE 250 EN 18-01 www.mecon.de Page 17 / 32... - Page 18 = not available Air (T = 0 °C, pe = 0 bar, η= 0.0181 mPa s, ρ = 1,293 kg/m³) Specify in plain text Without float damping With float damping Page 18 / 32 www.mecon.de BA RE 250 EN 18-01...
- Page 19 Water (η= 1 mPa s, ρ = 1 kg/l) Air (T = 0 °C, pe = 0 bar, η= 0.0181 mPa s, ρ = 1,293 kg/m³) Specify in plain text BA RE 250 EN 18-01 www.mecon.de Page 19 / 32...
- Page 20 Explosion protection – mechanical and electrical (MEM/MEM-PPA) approval ATEX EX ia IIC T6 Without marking Cardboard plate with a cable tie Stainless steel plate (dimensions 70 x 30mm) Cardboard plate with cable tie + stainless steel plate (dimensions 70 x 30 mm) Page 20 / 32 www.mecon.de BA RE 250 EN 18-01...
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Page 21: Technical Data
Protection class (DIN EN 60529) Climate classification Weatherproof and/or non heated locations Class C in accordance with DIN IEC 654 Section 1 Display unit made of aluminium: IP65 made of stainless steel: IP66 BA RE 250 EN 18-01 www.mecon.de Page 21 / 32... - Page 22 2.5 mm² Auxiliary supply voltage U 14 V … 30 V DC RE 250 with current output 4 … 20 mA and HART -Protokoll + digital output Measuring signal 4 … 20 mA = 0 … 100% flow value in 2-wire technology Power supply influence <...
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Page 23: Pressure Limits Vs. Temperature Stainless Steel
Pressure limits vs. temperature stainless steel Technical Data Fig. 10 Maximum Pressure PS vs. temperature TS BA RE 250 EN 18-01 www.mecon.de Page 23 / 32... -
Page 24: Dimensions And Weights
18,0 (39,7) 5” (4,92) (4,96) 22,0 (48,4) 6” (4,92) (4,96) 25,0 (55,0) All Dimensions in mm (inch) weights in kg (lbs) * For dimension L please refer to page 27. Page 24 / 32 www.mecon.de BA RE 250 EN 18-01... - Page 25 26,0 (57,2) 6” 125 (4,92) 126 (4,96) 175 (6,89) 120 (4,72) 29,0 (63,8) All Dimensions in mm (inch) weights in kg (lbs) * For dimension L please refer to page 27. BA RE 250 EN 18-01 www.mecon.de Page 25 / 32...
- Page 26 (6,22) 25,1(55,2) All Dimensions in mm (inch) weights in kg (lbs) For dimension L please refer to page 27. Dimension will be 258 mm for version with displaced display unit Page 26 / 32 www.mecon.de BA RE 250 EN 18-01...
- Page 27 = not available Devices with threaded connection: Mounting dimension L: 300 mm Special feature ANSI B16.5 ½“ for measuring tube B (measuring range end value 1000 /1600 /2500 /4000 l/h): BA RE 250 EN 18-01 www.mecon.de Page 27 / 32...
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Page 28: Electrical Connections
The display lid can be removed by loosening the four mounting screws at the front. Insert the connection cable through the cable gland at the baseplate. The RE 250 is equipped Limit switches with screw terminals. - Page 29 Electrical Connections Current output (MEM) Fig. 14 Connection diagram for RE 250 with two limit switches Fig. 15 Terminals (current output) Fig. 16 Terminals (with add. digital outputs) Fig. 17 Connection diagram for transducer MEM with current output BA RE 250 EN 18-01 www.mecon.de...
- Page 30 Current output with digital outputs (MEM) Fig. 18 Connection diagram for transducer MEM with 2 limit switches Fig. 19 Connection diagram for transducer MEM with limit switch and pulse output Page 30 / 32 www.mecon.de BA RE 250 EN 18-01...
- Page 31 Current output with HART Protocol (MEM) Electrical Connections ® Abb.20 Connecting terminal of the RE 250 with current output and HART -Protocol (MEM) Protection class ® Abb.21 Wiring diagram fort he transmitter with current output and HART -Protocol (MEM) The protection class of the display unit made of aluminium is class IP65. The version made of stainless steel will meet all requirements of protection class IP66.
- Page 32 MECON GmbH Röntgenstr. 105 50169 Kerpen / Germany Tel.: +49 (0)2237 600 06 – 0 Fax.: +49 (0)2237 600 06 – 40 Email: info@mecon.de www.mecon.de...
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