User`s Manual
Contents
1. fluids irregular width tanks non metallic tanks or for fluids with low dielectric e g diesel Opening the threaded aluminum cover an electronic insert could be found This is the electronic unit which converts the level into 4 20mA signal depending on the calibration The status LED is a bicolor LED that blinks alternately in Red and Green to indicate instrument is in process of converting the level to 4 20mA signal Two DIP switches are provided to calibrate the 4mA and 20mA points The calibration is easy and acomplete procedure is given in Calibration page The two wires connected at the back are pre connected sensor wires and should not be disturbed Also while calibration try to keep hands away from the wires of terminal 6 and 7 Now referring to the Connection Diagram page CAPVEL Can be wired in two possible combinations Preferred one is galvanically isolated 4 wire combination Where only one source of power is available 3 wire non isolated combination can also be used The converted level signal can be sensed using a 4 20mA indicator or PLC 4 20mA input or Multi meter in 40mA range or any other device thattakes 4 20mA signal as input E Page 1 CA PVEL ICT Specifications Mechanical Specs Housing Cast aluminium weather amp Flame proof suitable for mounting in hazardous area Gas Group IIA amp IIB as per IS 2148 Mounting Integral with sense rod or probe with SS MS plated Screw2. 1 1 1 2 BSP NPT M Flanged As per your order Cane Enny 2 X Ye 3 4 BSP NPT Brass Gland type Double Compression Gland Sensing Fully or Partially Teflon Coated Rod Flexible Probe SS 316 Stilling Tube Pipe GI SS Overall Dimensions Please refer enclosed probe drawing Electrical Specs Capvel BT 9v to 55v DC Mains Capvrl ICT 9v to 30v DC Power Consumption Capvel BT max 0 5 watt 12V Capvel ICT max 1 watt 12V Measurement Specs Measurement Span 15 to 3000pf above Zero Response Time 0 5 to 5 secs Adjustable Accuracy 1 FSLor better Electronics Ambient Temp 0C to 60C Fail Safe Feature Reverse Calibratable Low Level 20mA High Level 4mA Capvel BT Features User Interface 2 dip switches 2 LED Output 1 4 20mA Galvanically Isolated Output 2 Rs485 Digital Data Capvel ICT Features User Interface 4 Digit Display with 4 Keys 2 LEDs Output 1 4 20mA Galvanically Isolated Output 2 Rs485 Digital Data Output 3 Controling Devices connectd with External Relay Page 2 CAPVEL ICT Various Parts Aluminum Two LEDs Cover for showing Status Electronic Insert Aluminum Case Earth lerma I I Mountings gt NPT BSP Flanged Air Vents gt Stilling Tube gt Required for Low Dielectric Fluids Turbulent Fluids Non matallic Tanks Cable G
3. ADY ERROR om CODE DISPLAY ERROR Description Troubleshooting Remark Probes are Check the probes l Prop OPEN Circuited with multi meter PrSC Probes are Check the probes SHORT Circuited with multi meter Calibration is wrong 3 ECAL Calibration Error Please Recalibrate correctly Tank amp probe Dimensions are 4 PrHI Over Capacitance nabmaiched 5 PrLO Under Capacitance Tank amp probe Dimensions are not matched 6 RFOP Internal Reference Internal fault in sensor got open circuited 7 RESC Internal Reference Internal fault in sensor got short circuited RFHI Internal Reference Internal fault in sensor saturated 9 RFLO ditsi el Reference Internal fault in sensor negligible 10 OSC Oscillations Internal fault in sensor Stopped ih Page 7 CAPVEL ICT RS 485 Commands RS485 Serial Commands for Communication with CAPVEL Port Settings Baud Rate 9600 Flow Control NONE Data bits Parity Stop bit 8 N 1 may be changed on demand Asking Percentage Level Information Command Command Description to be send to Sensor Expected Response from Instrument Explanation Level would be calculated by dividing lt A PER gt lt A PER 01000 H gt 100 0 OVER incoming five digit number with 10 or Please note that lt B PER gt lt B PER 01000 N gt 100 0 NORMAL e Application software must have to or take care of any possible errors lt a PER gt lt a P
4. ER 00625 N gt 62 5 NORMAL during turn on or off durations or change in nature of service material lt z PER gt lt z PER 00000 N gt 0 NORMAL etc or lt Z PER gt lt Z PER 00000 L gt 0 LOW Configuring amp Asking Sensor ID on Network Factory Setted ID is A Command Command Description to be send to Sensor Expected Response from Instrument Explanation Asking single letter ID of Instrument on ei Instrument is telling RS 485 Network ee are it s ID ID is taken by Setting single letter ID of Instrument on Instrument RS 485 Network and this is the Ex setting id as A Capital A acknowledgement from it CAPVEL ICT Drawings Screw Screw with Flange Flange with Adjustable Stand off Stand off Flange Weather Proof Enclosure Lp Lp a f Flame Proof Gas Group IIA amp IIB IS 2148 n po S i Ls ennui Ji l P 4 0 Ls i i Lp NPT viehe ASA 1 234 BSP 9 1 he ANSI 1 2 3 4 using using lousing i Lp Probe Length Ls standoff length Refer your order amp Sapcon challan specifations for dimensions and other technical details of Screw Probe length Stand off length Flange Probe type rope rod with or without still tube CAPVEL ICT Tank Strapping Method of ap
5. User s Manual SAPCON Capacitance Level Indicator Controller and Transmitter CAPVEL Updated on 05 March 2013 BREA Capacitance Level Sensor rne O 5 lt RS 485 5 SAPCON INSTRUMENTS PVT LTD 131 Palshikar Colony Indore 452004 India Phone 91 731 2475751 52 53 email salesOsapcon in web www sapconinstruments com CAPVEL ICT Principle 8 Description Operating Principle CAPVEL is composed of specially developed Capacitance Change Gauging circuit It uses fast RISC based processor to perform all the complicated jobs of evaluating the Level out of the capacitance This capacitance is formed by the sense Rod and the metallic container wall Where containers are non metallic or not uniformally wide or having turbulent fluid a metallic stilling well is provided The amount of capacitance is proportional to the level of material between the sense rod and metallic wall of stilling tube or container System Description Referring to the Various Parts page CAPVELis composed of cast aluminum housing supplied with suitable mounting arrangement viz NPT BSP or Flanges and Two metallic cable entries An External Earthing Grounding Terminal is also provided The sensing rod which is mostly Teflon coated This sensing rod can be replaced by flexible probe for some applications The stilling tube is also provided for turbulent
6. e difference of mA x measured mA 4 Previous level is volume measured before existing strap Difference of volume is Maximum Volume Min Volume within the strap Difference of mA is Maximum mA Min mA within the strap Measured mA is mA just received by PLC For example shown above Volume of tank at various mA is 14L 28L 7mA x measured mA 4 if measured mA is between 4 0mA 11 0mA 421 121 2 25mA x measured mA 4 if measured mA is between 11 0mA 13 25mA 54L 10L 2 25mA x measured mA 4 if measured mA is between 13 25mA 15 5mA X mA 4 X mA 4 64L 1 2 25mA measured if measured mA is between 15 5mA 17 75mA 72L 1 2 25mA measured if measured mA is between 17 75mA amp 20 0mA Volume at various strapping level can be found by taking notes of amount of fluid needed to raise the level or it can be calculated mathematically from tank dimensions Also the more the number of straps the better the approximation is Caution Devices that work on capacitance principle for measurement of level of fluids are for indicative purpose only These devices should never be used for inventory control weights and measures or any other place where highly accurate measurement of fluid level volume weight etc is needed Page 10 Last Page SAPCON INSTRUMENTS PVT LTD 131 Palshikar Colony Indore 452004 India Phone 91 731 2475751 52 53 email sale
7. inos Lor Sensor 9 RS 485 We need to calibrate the sensor at any two levels before taking any reading from it a lt E a El aC In Calibration Process we Tell the sensor to remember 77 these two levels to use as reference in all calculations wjs OA ee Factory setting is A ae Low SCAL 0 and High SCAL 100 nee ES P Oo O19 2 We may adjust these levels any time by SCAL Menu Procedure of Calibration Calibrating Lower Level e HIGH Level 100 Level Da Y 100 Level High SCAL Fill the tank at High Level Fill the tank at Low Level O Low SCAL 0 Level 024 Level When material is at 0 or 4mA level O UP Press and Hold This Key 2 O For 3 Seconds 2 Osio O 0140 Press and Hold This Key O DOWN For 3 Seconds i res Limo 3 LL LME 3 aL me Wait for around 5 Seconds Wait for around 5 Seconds Lower Calibration has done Upper Calibration has done Now the Sensor is in RUN MODE again We can Calibrate 4mA and 20mA in any order according to our choice The order of empty fill or fill empty is immaterial z Page 5 CAPVEL ICT MENU MENU MENU CHANGE Description Remark Fail Safe Selection LFS FS H lt gt FS L FSH FSL Fail Safe High Low Control Action Selection roPt o Ind lt gt 0 PUM
8. land1 Full Teflon Insulated Part Teflon Insulated Rigid Rod Flexible without Still Tube Always fill equal to or more than this level for calibration and use Air Vents gt to material variation from bottom b 20 mm Insensitive CAPVEL ICT Connection Diagram Jumpers an lagacizaos Level Senor ene O Capacitance Level Sensor E RS 485 O 5 DC Supply 9V to 30V For Sensor amp Loop both Maximum Internal Resistance of Indicator PLC Scanner Sensor Supply 4V x 50 Ohm Multi Meter Optional Indicator or Scanner or PLC 3 wire Single Supply Operation Jumpers Towards ISO Capacitance Level Sensor PNP s lt RS 485 O 5 DC Supply 9V to 30V For Sensor Only ih Maximum Internal Resistance of Indicator PLC Scanner Loop Supply 4V x 50 Ohm ZO 4brow Multi Meter Optional Scanner or PLC LOOP SUPPLY 4 wire Dual Supply Operation Galvanic Isolated w Q oO S CAPVEL ICT Calibration ICT CAPVEL OA Porc
9. ng Individual PUM Pump Set point r SP_ 8 000 lt gt 5 100 Only in Individual Controlling ii Higher Set point igher Set poin Relay rSPH h 001 lt gt h 100 Only in Pump Controlling SPH must be Drive Lower Set point higher than SPL SPL L 000 lt gt L 099 Only in Pump Controlling Cover Delay r Cd C 000 lt gt C 100 E Un Cover Delay r Ud U 000 lt gt U 100 ip occ H SCAL SC H H 020 lt gt H 100 Higher SCALE LEVEL SCAL HIGH must be 20 or more Higher O ScalFactor SC L L 000 lt gt L 080 Lower SCALE LEVEL than SCAL LOW dISP Display Options M Display d PER lt gt d AmP PER Percentage AmP mAmp trbu i E e t 001 lt gt t 010 Turbulence Immunity t _ A Immunity to vehicle generated Only usefully in ie Mode beth oe Fer fate Vehicle tracking Systems gt Communication ID CID 1d 00 lt gt id 99 oF Sensor on RS485 Network Communication Baud Rate c bAU b 00 3 lt gt b 38 4 9 61000 9600bps and so on Com Flow Control c Flo RKCMd lt gt F AUt CMD Send data when Commanded Comm AUt Send Data Automatically pom Auto Data Sending Duration Settings edur d 001 lt gt d 250 in seconds Flow AUt Probe Length olr O LEN LEO 0 lt gt LE9 9 aaa Only for o PRF PR 1 lt gt PRF9 Profile optirzation Ta i SEr 12345678 Serial No Factory Sated i dAt 12345678 Mid Date amp Read Only in DD MM YY format Page 6 CAPVEL ICT Trouble Shooting ERROR DISPLAY amp REME
10. proximating volume of fluid in irregular shape tanks for PLC SCADA using CAPVEL 4 20mA output Sense Probe Q 100 20 0mA 72 6 78 L Diff of Vol 6 L Volume mA 6 2 25 2 67L mA rap4 Strap a _Diff of mA 2 25mA 85 9375 17 75mA 64 8 72L Tank y CE Strap3 a 6 Diff of Vol 8 L Volume mA 8 2 25 3 56L mA 2 N_ Diff of mA 2 25mA 71 875 15 5mA 54 10 64L 0 Diff of Vol 10 L 4 44L mA Stra 2 TE i Volume mA 10 2 25 4 44L m p o 5 Diff of mA 2 25mA 57 8125 13 25MA 42 12 54 L Strap1 2 S Diff of Vol 12 L Volume mA 12 2 25 5 33L mA Diff of MA 2 25mA 43 75 11 0mA 28 14 42 L oO sN Diff of Vol 28 L Volume mA 28 7 4 L mA Linear 3 8 Diff of mA 7 mA S 5 0 4 0mA 14L Offset Measurement Es Offset Volume begins from here Change of volume per mA is linear from bottom to mid level while it is non linear at top volume per mA decreases as level approaches 20mA PLC thus should convert level mA to volume from 4 to 11 0 mA linearly as Volume Offset Volume Change of Volume per mA x measured mA 4 However as soon as non linear range starts 11 0mA PLC should begin level to volume conversion differently The tank now should be strapped into a number of small zones of level where volume within each zone could be safely considered linear Then as long as level stays between those individual straps volume can be calculated as Volume Previous Volume difference of volum
11. s sapcon in web www sapconinstruments com
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