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Arkon Channelmag, Инструкция по эксплуатации

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19 

ChannelMag 

Section 2 Installation

 

 

2.6 Cable Types               

 

  

Exciter Coils  

Electrodes  

Reference Coils  

Black to 4  

Black to 24  

Black to 31  

White to 5  

White to 25  

White to 32  

Shield to 6  

Shield to 26  

Shield to 19  

 

The junction box is submersible and is potted with a re-enterable gel, 

but is not intended to be 

installed in the media flowing in the channel

. Cables from dual sensors are wired in the junction 

box as shown below in Section 2.6.2.  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ChannelMags  are  connected  to  a  junction  box  normally  using  cables  in  flexible  1”    (25mm) 

conduit. See the ChannelMag Sensor Specification for the standard cable and conduit lengths.  

The cables and conduit are stowed for packing against the side of the Magnetic Enhancement Plates 

and  are  marked  “coils,”  “electrodes,”  and  “reference.”  The  cables  from  the  junction  box  to  the 

transmitter are without conduits and connected to the remote transmitter terminals as follows (see 

separate instructions for the transmitter):

 

Содержание Channelmag

Страница 1: ...CHANNELMAG FLOWMETERS FOR OPEN CHANNELS AND NON FULL PIPES RTM Expolink s r o Prikop 8 60200 Brno Czech Republic Instruction Manual ...

Страница 2: ...l or write the ARKON Customer Service Department for assistance Address and contact information RTM Expolink s r o Prikop 8 60200 Brno Czech Republic Tel 420 545 175 834 Tel Fax 420 545 175 684 Email office rtm expolink com Website www arkon co uk For other countries consult your nearest ARKON representative Simple difficulties can often be diagnosed over the phone If it is necessary to return the...

Страница 3: ...uring installation This manual may also contain Material Safety Data Sheets MSDS for chemical agents supplied or recommended for use with this product If needed these sheets will be in the MSDS Appendix These sheets provide information about possible hazards from the chemicals Additional MSDS covering various proprietary agents name branded or trademarked mixtures that can also be used with this p...

Страница 4: ...M2 Sensors in Non Full Pipes 16 2 4 6 Installation of PM2 Sensors With Magnetic Enhancement Band 17 2 4 7 ChannelMag PM2 Enhancement Plate Expander Mechanism 18 2 4 8 ChannelMag PM2 Weights and Dimensions 18 2 5 Grounding 18 2 6 Cable Types 19 2 6 1 ChannelMag Junction Box Wiring Diagram 20 2 6 2 ChannelMag Entela Approval 21 2 7 Cable Runs From the Junction Box 21 Section 3 Calibration Data 3 1 C...

Страница 5: ...5 Table of Contents 4 8 Erratic Signal 24 4 9 Signal or Indication Swing 24 Section 5 Recommended Spares 5 1 Recommended Spares 25 24 24 25 ...

Страница 6: ...ss than 10 250 mm or wider than 15 feet 4500 mm or when used with ChannelMag type CM2 D the effectiveness of the enhancement plates is minimal so they are not normally supplied ChannelMag CM2 sensors generate a powerful magnetic field over the whole or significant area of the channel They operate using Faraday s Law where a conductor moving in a magnetic field induces a voltage the amplitude of wh...

Страница 7: ...sensor s firmly in place without the need of further fixtures or to cut holes in the pipe ChannelMag sensors generate a uniquely powerful magnetic field over the whole cross sectional area of the pipe They operate using Faraday s Law where a conductor moving in a magnetic field induces a voltage the amplitude of which is proportional to the velocity of the conductor The conductor is the media bein...

Страница 8: ...ul to the environment or to personnel They are certified as such to meet European CE requirements 1 3 Safety DANGER Crush hazard The flowmeters may be very heavy net weights from 45 to 450 lb 20 to 200 kg each You could be crushed to death or very seriously injured if the flowmeter slips during installation and strikes you or falls on you Handle with care when installing and be sure that hoisting ...

Страница 9: ...m flowing media since in so doing the enhancement plates may be damaged The ChannelMag is highly insensitive to environmental electrical noise including interference from radio and variable frequency drives However it is good practice to locate the ChannelMag and ancillary equipment away from the immediate area of such noisy environments The ancillary electronics must be located remotely from the ...

Страница 10: ...channel widths are required upstream and downstream The straight lengths are measured from the end of the ramps When ramps are not supplied and the ChannelMag CM2 sensor s is inserted into a recess in the base of the channel then the straight lengths are measured from the end of the CM2 sensor W channel width not necessarily the width of the CM2 sensor 7W upstream minimum length2W downstream minim...

Страница 11: ...cal flows These critical flows are circumvented if the CM2 is let into a recess in the bed As such the upper surface of the CM2 sensor may be up to 1 25mm above the channel bed to avoid silt build up The ultrasonic level transducer may then be mounted directly above the CM2 sensor s Note the minimum dead band for the ultrasonic level transducer When a hydrostatic level transducer is used it is nor...

Страница 12: ...the mounting brackets 1 4 6 3mm thick base plates with countersunk 1 4 screws from the bottom Note A CM2 8 sensor is always supplied with ramps Cables from each sensor are to run in separate conduits to the ChannelMag junction box situated above the level of the flowing media The cable runs are omitted in the drawing for clarity For Entela approval for Zone 2 or Class 1 Div 2 areas see notes in Se...

Страница 13: ...ecess in the bed of the channel the installation configuration remains the same 1 4 6 3mm thick base plates with the recess must extend over the full channel width countersunk 1 4 screws from the bottom Advised Width of Channel The height E of the magnetic enhancement plates is custom made and normally extends to 4 100mm nominally above the maximum level The width W is adjustable to fi t the chann...

Страница 14: ...ed to protrude above the bottom of the channel by a suggested maximum of 0 5 10mm as shown in the diagram below The CM2 8 24 and 40 ChannelMag sensors are normally supplied with mounting brackets at each side The mounting brackets are placed over two clearance slots cut into the Magnetic Enhancement Plates Base plates with fixing screws countersunk from the bottom side are then used to secure the ...

Страница 15: ... the number of straight lengths of pipe available For 48 120 1200 3000 mm diameters either 2 sensors or 4 sensors are used again dependant on available straight pipe lengths The sensor s are attached to a stainless steel retention band designed for a specific pipe internal diameter The retention band is equipped with an expander mechanism which opens out against the pipe internal diameter to secur...

Страница 16: ... pipe with their center lines equally dispersed at 15 degrees from the pipe center For partially filled pipes a hydrostatic level transducer is incorporated in a ramp on the upstream end of the sensor The level transducer cable includes a breather tube which is vented in the remote 4411e transmitter or in a junction box when the cable is longer than 33 feet 10 m The cables are run in plastic condu...

Страница 17: ...g Section 2 Installation 2 4 6 Installation of PM2 Sensors With Magnetic Enhancement Band Center spacer used for compound sensor installation only Outer mounting points used without center spacer Bands joined here ...

Страница 18: ... However for longer cable lengths a pre amp in the junction box is necessary ChannelMag Section 2 Installation 2 4 7 ChannelMag PM2 The expander mechanism incorporates 2 left hand and right hand threaded rods which when turned with a wrench spanner secure the enhancement plates and sensor assembly firmly in pipe Additional fixtures or holes in the pipe are unnecessary Total cable distances of grea...

Страница 19: ...sors are wired in the junction box as shown below in Section 2 6 2 ChannelMags are connected to a junction box normally using cables in flexible 1 25mm conduit See the ChannelMag Sensor Specification for the standard cable and conduit lengths The cables and conduit are stowed for packing against the side of the Magnetic Enhancement Plates and are marked coils electrodes and reference The cables fr...

Страница 20: ...20 ChannelMag Section 2 Installation 2 6 1 ChannelMag Junction Box Wiring Diagram ChannelMag Section 2 Installation CAUTION SHIELD BLACK RED OR CLEAR ...

Страница 21: ...Zone 2 requirements conduit is not necessary 2 For a single ChannelMag sensor or remote junction box for use with multiple ChannelMag sensors that are Entela approved to ATEX Zone 2 standards it is conditional that the reference coil exciter coil and electrode cables emanate from 3 separate cable glands Alternatively the reference coil and exciter coil may run in a 4 core cable consisting of 2 x 2...

Страница 22: ...r coil cables may all run together in a single conduit even with other power cables Again the multi exciter coil cables must be separated from the reference and electrode cables by a minimum of 2 feet 0 5m The calibration data is provided on the NIST traceable Calibration Certificate as well as on a label inside the 4411e transmitter Details of adjustments in a fl ow range are provided in the 4411...

Страница 23: ... function of the transmitter Note Bad grounding will not affect the electrical zero and span test Grounded Electrode The exciter coils of the ChannelMag sensor should be checked at the transmitter end Remove from terminals 4 5 and shield 6 There should be a minimum 10Meg Ohms typically 20Meg Ohms between 4 and 6 and 5 and 6 respectively If there is less than 10Meg Ohms moisture has probably leaked...

Страница 24: ...on 2 5 d Check for loose wiring e Make sure cables are not too long For multiple ChannelMag systems make sure electrode cables are separated from other cables see Section 2 7 f The ChannelMag has high insensitivity to radios and variable frequency drives If these are in close proximity to the transmitter or sensor then cable lengths should be kept to an absolute minimum Check the following a Make ...

Страница 25: ...ecommended spares Make sure when ordering a new ChannelMag sensor or transmitter that the serial number found on the transmitter label is advised When a new ChannelMag sensor is provided it has a new Calibration Certificate Make sure the new calibration factor is entered into the transmitter in accordance with the appropriate transmitter Instruction Manual ...

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