Service Manual for Flow Meter / Monitor Typ: DSV-
Contents
1. 4 Float PVDF 4 2 Contact toggle function 2 1 Slit orifice Brass o Ex contact N O 2 2 Slit orifice St Steel 4 4 Ex contact 4 5 Ex contact N O Mining 6 Ex contact toggle Mining 5 1 Meas glass with scale DSV 12 02 Seite 11 DSV 13 Declaration of Conformance We KOBOLD Messring GmbH Hofheim Ts Germany declare under our sole responsibility that the product Flow Meter Monitor Type DSV is in agreement with the following standards DIN EN 61010 1 1994 03 Safety requirements for electrical equipment for measurement control and laboratory use DIN VDE 0470 1 1992 11 Protection through housing IP code Also the following EWG guidlines are fulfilled 73 23 EWG Signature JF ow Vu H Peters M Wenzel Date 30 09 02 Seite 12 DSV 12 022. R20 G 3 4 Pract __ p R32 G14 BB 2 N O contacts BVS DSV 12 02 12 Dimensions DSV Type SW G L mm D mm Weight approx kg dP Float with unit version DSV 1 DSV 2 DSV 3 bar Brass St Steel DSV 01H 32 161 165 43 0 75 1 0 1 25 0 04 PP PVDF DSV 02H 32 161 165 43 0 75 1 0 1 25 0 06 PP PVDF DSV 03H 32 161 165 43 0 75 1 0 1 25 0 04 PP PVDF DSV 04H 32 165 43 0 75 1 0 1 25 0 04 PP PVDF DSV 05H 32 165 43 0 75 1 0 1 25 0 07 MSNi pl 1 4301 DSV 06H 41 1 165 176 48 1 0 1 25 1 5 0 08 PP PVDF DSV O7H 41 1 165 176 48 1 0 1 25 1 5 0 14 MSNi pl 1 4301 DSV 08H 41 1 204 48 1 2 1 45 1 7 0 3 MS Ni pl 1 4301 DSV 09H 46 114 222 55 1 5 1 75 2 0 0 4 PP PVDF DSV 1 DSV 2 DSV 3 i fi 30 43 M 3 eae A a mi iTo i J NS ro ee Both edge connection a Both edge connection Both edge connection 7 13 Recommended Spare Parts Only the unit parts and materials will be listed Corresponding to the unit type parts in different sizes are available Please ensure you mention the unit type when ordering spare parts 1 1 Float Brass 3 1 O Ring Perbunane 1 2 Float Polypropylene 3 2 O Ring Viton 1 3 Float St Steel 4 1 Contact N O function 1
3. extracted for cleaning The measuring glass can be cleaned with the help of a suitable brush After cleaning the unit must be assembled in the correct sequence DSV 12 02 10 Technical Data DSV Housing Connections Float Orifice Measuring glass Sealings Max temperature Max pressure Accuracy Mounting position Weight Pressure loss Contacts DSV 2 DSV 3 Electrical Switching parameters N O contact CSA Changeover contact CSA N O EExd IIC T6 Changeover EEx d IIC T6 N O EEx ia BVS Mining Changeover EEx ia BVS Mining Electr Connection Except DSV E DSV X Protection cat DSV 12 02 Aluminium anodised no contact with Medium DSV x1 Brass MS 58 Ni plated DSV x2 St Steel 1 4301 see Ch 11 Dimensions DSV x1 Brass MS 58 Ni plated DSV x2 St Steel 1 3955 Duran 50 Borosilicate glass DSV x1 Perbunane DSV x2 Viton 100 C Metal float 70 C PP or PVDF float 10 bar 4 F S vertical flow from bottom see Ch 11 Dimensions see Ch 11 Dimensions max 240 VAC 100 VA 1 5A max 240 VAC 60 VA 1A max 250 VAC 80 VA 2A max 250 VAC 60 VA 1A max 250 VAC 100 VA 1 5A max 220 VAC 60 VA 1A Plug DIN 43 650 1 5 m cable IP 65 Seite 9 DSV 11 Ordering Codes Order Details Example DSV 2101H RO R08 Flow meter model DSV 1 Measuring Pressure range l min water Float according to
4. version 0 25 1 25 Float according to version St steel range l min water 0 25 1 25 145 1 10 2 18 2 25 2 5 50 10 100 Brass nickel pl Stainless steel DSV 1201H Po pp evor osv rtoen Dsv 1200H Stainless Contact steel RO 1 N O contact DSV 2101H DSV 2201H DSV 2102H DSV 2202H DSV 2103H DSV 2203H DSV 2104H DSV 2204H DSV 2105H DSV 2205H A0 1 changeover c BVS Flow meters and switches with 2 contacts model DSV 3 Measuring Pressure range l min water Float according to version Brass St steel 0 25 1 25 Seite 10 Stainless steel DSV 3105H DSV 3205H o4 pe pvor__ bsv 3109H Dsv 3200H 00 without contacts XX 2 Ex changeover c AA 2 changeover c BVS Connection Standard R15 G 1 2 RO8 G 1 4_ R15 G 1 2 R15 G 1 2 R15 G 1 2 R20 G 3 4 R25 61 R32zc ma Connection Standard R08 G 1 4 R15 G 1 2 RO8 G 1 4 R15 G 1 2 RO8 G 1 4 R15 G 1 2 U0 1 changeover c E0 1 Ex N O contact X0 1 Ex changeover c 1 N O contact BVS R20 G 3 4 R20 G 3 4 R2561 R32 zG0 4 Contact Connection RR 2 N O contacts UU 2 changeover c EE 2 Ex N O contacts wROB G 1 4 R15 G 1 2 wR15 G 1 2 R15 G 1 2 wR15 G 1 2
5. version Ex contact N O Ex contact switch over To a large extent the contact is adjustable over the entire measuring range while giving due consideration to hysteresis DSV 12 02 Seite 3 DSV 4 Operating Principles The flow meter and monitor of type DSV operate according to the famous principle of float flow metery though without using generally employed extended conical measuring tube These patented units incorporate instead a cylindrical lead pipe which has a slit along the periphery of the cone Inside this lead pipe a float is situated which lifts up as the liquid rushes into the pipe Every float position corresponds to a definite flow value which can be read from scale attached to the measuring glass Inside float element permanent magnets are embedded which energise a protective gas contact Reed Switch The triggering of contact takes place in a non contacting fashion through magnetic force i e the contact is hermetically separated from entering medium NS ELE SS 5 Instrument Inspection These devices are examined before dispatch and sent away in perfect condition Should damage to a device be visible then we recommend an exact check of the delivery packing In case of damage please inform the postal service forwarding business immediately since they hold the responsibility for any damages during transit Scope of delivery Scope of delivery applies to all parts assem
6. Service Manual for Flow Meter Monitor Typ DSV OBOLD uU O DSV 1 Contents Te WIV SSG WCE i cesta csi ee dete 3 2 CGOMEN S ca chiceceaececucvcucnccensccnccceeconcesccecceccenecceesescecex epcecceees 2 3 Suggested Application sssseseeeereertrrrrrrrrrrrrrrrrrrrn nrnna 3 4 Operating Principles cc ceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 4 5 Instrument Inspection sisiniscissscsietecuaxgbasaeevecertbevasasaveduneraeens 4 6 Mechanical connection sessssssssessesrsrisrierrerrenrinrrerrenrenne 5 Tz Electrical COMMOCHOM co wccccvccnctce cess cnadcatesnassctecencdatechacsoasdondeos 6 8 Commission of Unit sscicscicenccicscenivecedondvensvenctasacactwacatonctevedes T 9 Maintenant Sass sess aa a a aN 8 10 Technical WAN A oc cecccccccecutecccetccczecceosesncoacsecccsapssensmacteccebceeeeess 9 11 Ordering CodeS s2 ccoc22 niet es ee eee 10 TA NVC TISION Sxgsotsicete coc a sila sestaniacudslan aa aiia iiaeie 11 13 Recommended Spare Parts cccccccccsssesseeeeeeeeeeeeeees 11 13 Declaration of Conformance ccccccccceceeeeeseeeeeeeeeeees 12 Manufactured and sold by Kobold Messring GmbH Nordring 22 24 D 65719 Hofheim Tel 49 0 6192 2990 Fax 49 0 6192 23398 E Mail info de kobold com Internet www kobold com Seite 2 DSV 12 02 DSV 2 Instructions Please read this operating instruction carefully before unpacking and set up These devices may be used
7. bled within the unit Seite 4 DSV 12 02 DSV 6 Mechanical connection Before installation e Make sure that the permitted max operational pressure and temperature limits are not exceeded see Ch 10 Technical Data The installation of the unit is rendered vertically in the piping scheme The flow should take place from bottom to top Remove all transport safety locks and ensure that no remains of packing material reside inside the unit The sealing of union fittings is carried out through Teflon band or similar material During installation of these devices attention must be paid to the ascertain that no large course or pressure load is exercised on the union fittings We recommend to fasten the inlet and outlet line at approx 50 mm distance mechanically from the union fittings The units may not be installed at a location within an inductive field Note The union fittings of these devices must be held fixed by means of a suitable fork wrench while screwing in Otherwise stresses will transfer to the housing which may lead to the destruction of graduated measuring glass e f possible it should be checked after mechanical installation whether the connections between union fittings and pipes are properly sealed Attention While installing in a free and open environment please pay attention to the fact that the freezing of medium can destroy the measuring tube DSV 12 02 Seite 5 DSV 7 Electrical connec
8. maintained and installed only by personnel who are familiar to work with operating instructions and can observe appropriate safety measures PED 97 23 EG In acc with Article 3 Paragraph 3 Sound Engineering Practice of the PED 97 23 EC no CE mark Table 8 Pipe Group 1 dangerous fluids 3 Suggested Application These units of type DSV are employed for measurement and monitoring of flow of liquids Only those liquids may be measured which are homogeneous free from impurities and have low viscosity Also they must withstand against materials used in fabrication of these units Media having high viscosity can introduce considerable measurement errors partly Large dust particles can block the float resulting in error messages and erroneous measurements Also ferrite particles which deposit on the embedded magnets of float can trigger the same effect To overcome this problem installation of a magnetic filter is recommended The units are provided as follows Flow measurement The reading of current flow takes place on the spot Top edge of the float displays the flow directly in l min water on the scale attached to the graduated measuring glass Limit contacts only with type DSV 2 and DSV 3 With a view to monitor the flow values all units are provided with one or two adjustable limit contact s Standard version Normally Open function with increasing flow Special version Switch over function Special
9. ondensators and Protection by direct conductor capacities current and inductive load with diode 8 Commission of Unit Application in machines according to guidelines 89 392 EWG the commissioning of these units is barred till it is determined that the machine is in agreement with the designations of guidelines Adjustment of limit values e Loosen both the safety screws on the contact base with the help of a screw driver e Dislocate the contact base till lower catch e Remove the plug cap after loosening the safety screws e Connect with PIN 1 2 toggle contact PIN 2 3 a Suitable circuit test unit Attention Sudden opening of the supply can lead to pressure peaks which repeatedly exceed the operating pressure Water hammer This can lead to the breakage of the measuring glass DSV 12 02 Seite 7 DSV Case 1 Device in circuit Case 2 Device outside circuit Open the supply line Raise the float with a suitable tool Let the medium flow slowly till the till the top edge of the float shows Top edge of the float shows the flow the desired flow volume of desired Volume of desired switching point switching point e The reed contact is now closed electrically closed circuit e Dislocate switch housing upwards till the reed contact is just open no electrical passage The contact is now adjusted for decreasing flow If the contact needs to be adjusted for increasing flow it must be relocated now a
10. round the hysteresis about 3 5 mm downwards e Adjust the safety screws in this position by tightening them Put on plug cap The unit is ready for operation The correct adjustment of limit contact has the bistable switching behaviour i e on exceeding the adjusted limit contact remains closed and below the adjusted limit contact stays open Hysteresis Hysteresis reflects the difference between switch on and switch off points of contact Through standard tuning of magnet and contact pith AW number a hysteresis of about 3 5 mm float stroke is achieved Thereby simultaneously ensuring that the contact exhibits bistable behaviour Transgression of measuring range Attention Continuous violation of measuring range by pulsating flow and thereby resulting jerks of float on the limit pin can lead to increasing wear and damage to the unit In such a case please consult your supplier Non pulsating flow can essentially exceed the measuring range merely resulting in a notable increase in pressure loss Permitted max operational pressure not to be transgressed 9 Maintenance Seite 8 In case the medium to be measured is free from impurities the units of type DSV are almost maintenance free If lime or other deposits on measuring glass or within interior parts develop the units should be cleaned on a regular basis After removing the upper grub screw screw joint can be withdrawn from the unit and the inner parts can be
11. tion Only for type DSV 2 and DSV 3 e Ascertain that the electric supply lines are N O Contact not active Loosen the stopping screw of plug cap and draw off the cap crown from plug base Assemble the power lines inside plug cap according to the adjoining connection a diagram change over e f the contact is not adjusted yet this should contact be done for good reason at this point see Ch 8 Commissioning Place the plug on the contact base and Note The given electrical parameters of contact may not be exceeded individually even for a brief period of time For higher switching values we recommend a protective contact relay or some other contact protection measure After connecting the limit contact with the external devices you wish to incorporate within the system and adjusting the desirable switching points all connection work is completed The unit can now be put into operation Seite 6 DSV 12 02 DSV Example for protective contact measures For capacitive and inductive loads long conductors and relays contactors we recommend that you use protective contact relays or make use of protective circuits U Reedswitch Reedswitch U R4 U load R2 Protection by accelerate Lamp load with parallel or serie current and Inductive Resister for switching load with RC element U Reedswitch L Conductor capacity Reedswitch load load Protection against high currents of c
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