OPERATING INSTRUCTIONS FOR Flow Meters of the series: “VHM
Contents
1. 65 e Type code for VHM Titan Flow meter VHM Titan 20 Preamplifier VRLI 02S00 N Standard Ex intrinsically safe VWLI 02500 N Standard Ex intrinsically safe co T ka L a 29 45 Flow meter VHM 02 12TS13 1 N Standard S Special shaft D D Shaft i FFIR 18 VHM aM oa Signal pick up Bearing Type N Standard D D Shaft S Special shaft Series Modification Id no Sequential custom no Construction s Custom Material T Titanium Backlash 1 Reduced backlash 2 Normal backlash 3 Increased backlash Measuring 1 Technical data range 2 Technical data 3 Technical data Size 01 VHM 01 02 VHM 02 VSE measurement Technical data for single pick ups VRI S N VWI S N for VHM Titan Supply voltage U 8 30 V DC 10 Current consumption idle approx 4 mA idle motion U 30 V DC Signal output circuit Transistor with series resistor R 2 x 620 Q PNP and NPN selectable PNP signal output High Signal U U 1 V 1 10 mA max NPN signal output Low Signal U U O V I 10 mA max Signal switching frequency 3 Hz approx 1 000 Hz Electrical connection VSE standard connector M12 Medium temperature 20 C 85 C 4 F 185 F Amb2. E Series Modification Id no Type ofseal F FEP FPM standard Type of P Subplate connection R Piping Material 2 V2A A V4A Backlash 1 Reduced tolerance 2 Normal tolerance 3 Increased tolerance Measuring 1 Technical Data range 2 Technical Data 3 Technical Data Size 01 vHmo1 02 vHMo2 03 VHM 03 AHM mounting plate Series Modification Id no Version Standard Special version Connection thread G 1 8 G 1 4 G 3 8 G 1 2 1 8 NPT 1 4 NPT 3 8 NPT 1 2 NPT Connection position side Side connection Below connection Material V2A VAA Size VHM 01 VHM 02 VHM 03 S sn lco Ionvou gt n z oO oO 13 VSE measurement Technical data for VII S N VTI S N single pick ups Supply voltage U 8 30 V DC 10 Current consumption idle ca 4 mA bei 30 V DC Signal output circuit Transistor with series resistor R 2 x 620 Q PNP and NPN selectable Signal pick up PNP signal output High Signal U U 1 V 1 10 mA max NPN signal output Low Signal U 0 V I 10 mA max Signal switching frequency 3 Hz approx 1000 Hz Electrical connection VSE standard connector M 12 Flowmeter Medium temperature 20 C 120 C 4 F 248 F Ambient temperature 20 C 60 C 4 F 140 F Material Stainless steel 1 4305 Mounting plate for side mounting Weight 115g Depends on the VHM flow meter size Connection for pot
3. gt o 1 Flow direction VSE measurement 2 Flow direction Declining flow Frequency decrease gt Rising flow Frequency increase gt lt 1 Flow direction from A 9 B gt lt 4 2 Flow direction from B A gt A y A y A y A y y A y Channel 1 1 3 1 1 3 1 H x i i Ay A y A Vv A y A Channel 2 2 4 2 I 2 4 D l Loe I gt t f ca SHz f gt ca 5Hz one volume measurement 1V Direction turning m one chamber volume one tooth one gap rotation of one tooth 360 Figure 4 Signal output with two single pick ups Q 0 ml min e Output circuits for the various types of preamplifiers There are two versions of single pick ups available Single pick up VII S N VTI S N with modified frequency and single pick up VEI S N in the round face housing of the dual pick up The single pick up VII S N VTI S N is placed in a small tube housing so that it can also be used as a sensing system for other applica tions like turbines for example The VII S N and VTI S N have two transistor outputs for a PNP or NPN output signal see the wiring diagrams The preamplifier electronic for operating especially lightweight titanium flow meter is identical to the VII S N VTI S N preamplifier elec tronic and is labeled with VRI
4. S N and VWI S N The single pick up VEI S N and the dual pick up VDI S N in the round faced housing have an optocoupler transistor in the output for Important electromagnetic compatibility directives Please make sure that no extra inductive elements are connected in the power supply of the flow meter such as contactors relays valves etc These components are potential sources of interference especially if the inductive elements are not provided with an adequate protective circuit They generate high interference pulses when switched and can interfere with the functioning of the flow meter although this complies with the an electrically isolation from the operating voltage of the pick up The transistor output can be supplied with voltage using the operating voltage of the flow meter or using a separate power supply A PNP or NPN output signal is generated depending on the polarity of the power supply voltage on the transistor see wiring diagrams The power supply voltage range is U 8 30 V DC You can operate the preamplifier with any voltage in this specified voltage range U but make sure that the signal voltage is always adjusted to the power supply voltage A steady direct voltage with a maximum residual ripple of 10 is permitted for the power supply In all standard versions of the VHM series are 2 additional 620 Q resistors connected in series in order to limit the current at the
5. 0 0 0 e eee eee 9 Customisolufions ausnksus isst ORD paw hea ed eG ee RS Mae he had 10 Maintenance and repair eesosa ceding caudate ee 10 Maintenance and repair of devices 2 22c22eseeseeseeseeseeseesee nennen 10 Technical data for the VHM flow meter 0 00 0 0 0 eee eee eee teen ees 11 Dimensions for VHM flow meter yerine kesian ea pe e e GTE RES 11 Dimensions for AHM mounting plates 2c22eceeeeeseeseeseeseenenenenn 12 Type codefor VHM AHM us 2 ee ee hl 13 Technical data for VII S N VTI S N single pick ups 222222222200 14 Electronic connection data for VII S N VTI S N single pick ups 15 Technical data for single pick ups VEI S N single pickups 22222 22222000 16 Technical data for dual pick ups VDI S N dual pick ups 00 00202 ee 16 Electronic connection data for VEI S N single pick ups VDI S N dual pick ups 17 Type code signal pick ups cece eect eeraa 18 Technical data for VHM Titan 0 0 2 e tenn e eens 19 Dimensions for VHM Titan 0 0 2 0 cece eee ete teen eens 19 Type code tor VHM Titan esun a sen een 20 Technical data for single pick ups VRI S N VWI S N for VHM Titan 21 Electronic connection data for single pick ups VRI S N VWI S N for VHM Titan 21 Type code signal pick ups for VHM Titan 20 2 0 eee eee eee ees 22 VSE measurement Important basic information D
6. a measuring accuracy of up to 1 0 of the measured value and a repeat accuracy of 0 5 is specified non return valve flow meter ER tank Figure 1 Flow meter with backpressure gt Block mounting The flow meter is mounted on a subplate The subplate is installed in the pipe and is equipped with all hydraulic connections and mounting holes required for mounting the flow meter install it in the system or machine without requiring any reduction fittlings The flow meter is screwed onto the subplate using pan head screws Tigh ten the screws by hand as tight as they will go first In special cases the flow meter can also be mounted directly in the pipe Important have significant consequences in certain cases Cleaning and rinsing the pipes before operation Before you operate the flow meter you must carefully clean and rinse the entire system so that no foreign particles can get into the measuring unit of the flow meter when it is being installed Foreign particles can block the measuring unit and damage it so badly that the flow meter is unable to supply any valid measurement values any more and must be sent in for repair After completion of the system or installation of the piping you must carefully clean and rinse the entire piping system and the tank first The flow meter must be removed from the piping system Use a rinsing agent that is compatible with the medium to be used later
7. 61630 Fax 49 0 2394 61633 E Mail info vse flow com Internet www vse flow com 10 08 www plakart de
8. Current consumption idle Signal output circuit PNP signal output NPN signal output Signal switching frequency Electrical connection Media temperature Ambient temperature Material Weight U 8 30 VDC 10 ca 4 mA bei 30 V DC Transistor with series resistor R 2 x 620 Q PNP and NPN selectable by external connection High Signal U U 1 V 10 mA max Low Signal U 0 V I 10 mA max 6 Hz 500 Hz pulse doubling 12 Hz 500 Hz pulse quadrupling VSE standard connector M 12 20 C 85 C 4 F 185 F 20 C 60 C 4 F 140 F Anodized black aluminum Stainless steel 1 4305 coil 165g Note that the flow measurement range is limited due to the quadrupling pulse mode Connection for potential equalisation 16 I VEI S N 225mm LH Single pick up N ll Connection for potential equalisation Dual pick up Pin No 2 line color white Signal output U 68 mm Height 43 mm Pin No 3 line color blue Supply 0 V Output signals Coding pad J1 Duplication of flow meter output signals Coding pad J1 quadruplication of flow meter output signals Pin No 1 line color brown Supply U Pin No 4 line color black Signal output U Pin configuration VSE measurement Electronic connection data for VEI S N single pick ups VDI S N dual pick ups j rown 8 V 30V ov 2
9. flow throughout the system Is an overpressure valve bypass provided in the system Have you selected the best possible flow meter and is it equipped with the proper preamplifier Does the power supply voltage of the flow meter correspond to the provided voltage s the supply voltage provided by the power supply or signal processor sufficiently steady Was the electrical connection wired according to the connection diagram provided s there an equalizing conductor connecting the flow meter to the signal processor to eliminate any voltage differences between them s the flow meter securely connected to the grounded PE conductor LLbbbbuss s the measuring unit of the flow meter isolated from the grounded PE conductor e g connected using a sleeve If it is isolated then the measuring unit must be connected to the grounded PE conductor 4 s there a continuous connection from the cable shielding grounded PE conductor through the housing and the 4 pin round plug to the measuring unit of the flow meter TRER this safety equipment is to be checked at regular intervals Maximum operating pressure Before installing the flow meter you must make sure that the maximum operating pressure of the system does not exceed the maximum permissible operating pressure of the flow meter Please also note the peak pressures can arise when operating the system Important The maximum operating pressure for flow meters in
10. VSE measurement OPERATING INSTRUCTIONS FOR Flow Meters of the series VHM in Standard Version VSE Volumentechnik GmbH H nnestra e 49 58809 Neuenrade Germany Phone 49 0 2394 61630 Fax 49 0 2394 61633 E Mail info vse flow com Internet www vse flow com Table of Contents Page Important basic Information u 0 4 0 en een Dee 3 Functional description of the flow meter 22222222 cece eee e eet eee ees 4 General deschipli n a u 324 wd adnan na cer ad umes ants na SEEE R 4 Flow Meter S lection sic icss cas 28 Reue he ehe 4 Declaration of Conformity our samen ov cng aca ea ann ov eae been ee Caw innen 4 General requirements for operation 2 00 0c eee cence etn eee e es 4 Maximum operating press re s samensneen pen ar Mite S cea 4 Praca ane ane emcees 5 Statement to EU Directive 97 23 EG Pressurized Devices 0 00 annann 5 Flow measurement range u anne nn nr eee ees 6 Installing the flow meter 0 00 cece cece eee eet ete n teen ees 6 Cleaning and rinsing the pipes before operating 0 0 0 eee e eee tenes 7 Preamplifier ac sans een Manco a Deed anes aa dees eek enue 7 General information u unsern ee cade wenn amen 7 Thessingle piGk Up su anne div ew eae nn a ea 7 The dual pickup u ea aoe wind swe rn ORE a 7 Application with directional detection 222222ecsseeseeeeeeee eee 8 Output circuits for the various types of preamplifiers
11. d from the number of pulses and the frequency VSE measurement j Increasing flow rate Increase in the sensor frequency l l Output signal with operation of a single pick up l l N Output signal with operation of a dual pick up double pulse one measurement volume 1V m one chamber volume one tooth one gap one movement of tooth 360 Figure 2 Signal output of the preamplifier Application with directional detection If it is necessary to detect the flow direction then the flow meters are ope rated by two single pick ups type VII S N and VTI S N The two single pick ups are set up with a mechanical phase offset of 90 with re spect to the tooth flank sequence To prevent the signals of two single pick ups from interfering with each other you should select pick ups with two different carrier frequencies Position of piping connection with 2 single pick ups Figure 3 Application with directional detection t ie one with a normal carrier frequency VII S N and one with a modified carrier frequency VTI S N The 90 phase offset between the two pulse signals allows you to incre ase the resolution by processing the rising and falling edges from both channels Processing the signals in this manner allows for a resolution of 4 of the measured volume Single pick up Single pick up VTII VII Flow meter Mounting plate for side
12. ding factor for the trouble free and safe operation Due to the wide variety of applications and flow meter versions the technical data provided in the VSE catalogs are of a general nature Certain Declaration of Conformity VHM series flow meters are tested for their electromagnetic compatibility and noise emission according to the EMC regulations and meet the requi rements of the applicable legally required EMC directives They cannot be operated independently They must be connected to a power source via cable and they output digital signals for electronic processing There is a declaration of conformity available for all flow meters Since the EM compatibility of the overall measurement system also depends on the routing of cables on proper connection of the shiel e General requirements for operation Before installation or operation you must check the following properties of your system and take the following aspects and corresponding conditions in your system into account for trouble free and safe operation of the system 1 The medium to be processed Is the flow meter suitable for the medium Is the medium viscous or abrasive Are there any fillers or other additives in the medium Is it necessary to install a hydraulic filter before the meter Which types of cleaners are used Can the seals withstand the cleaning agents and medium HhLtebLbL Lett bisvs gear rotates This volume of fluid displaced by one gap t
13. during operation and will not cause any undesired reactions You can obtain the corresponding informa tion from your supplier the manufacturer ofthe medium or from VSE Important e Preamplifier General information The preamplifiers are supplied in different versions depending on the type of application Single and dual pick ups are available The basic method used to sense and measure though is the same for both versions The single pick up The single pick up operates with a carrier frequency oscillator that is modu lated whenever a tooth passes by This modulation is evaluated by the sub sequent preamplifier electronics and generates a modulated digital pulse The dual pick up The dual pick up operates with two independent carrier frequency oscil lators that are modulated whenever a tooth passes by The electronics generates a pulse signal for each modulation The pulses from both pick up systems are combined in the subsequent preamplifier electronics and When mounting the flow meter you must make absolutely sure that the seals are not damaged in any way and are seated correctly in the hydraulic connections of the flow meter Incorrectly installed or damaged seals can result in leakage and a leaky system which can The yellow plastic stoppers in the hydraulic connections of the flow meter protect the measuring unit from dirt and contamination when the flow meter is placed in storage or for transportation purpo
14. ear customer dear user These installation and operating instructions should provide you with the information you need to properly install and commission the flow meter The installation commissioning and testing are to be performed by trained and qualified personnel only These operating instructions must be read and applied carefully to ensure proper trouble free and safe operation of the flow meter VSE is not liable for any damage incurred resulting from not complying with the instructions in this operating instruction It is not permitted in any case to open the device These operating instructions for the flow meters of the series VHM in Standard Version from VSE must be stored so that they can be read by the group of authorized personnel at any time Chapters may not be taken of these instructions at any time A missing operating instructions manual or missing pages must be replaced immediately VSE can supply you with new instructions or you can download the operating instructions from the internet www vse flow com The operating instructions must be given to each subsequent user of this product Legal information This document is not managed by an updating service of VSE Volumentechnik GmbH Changes to this document may be made without notice VSE Volumentechnik GmbH does not provide any implicit guarantees of commercial qualities and suitability for a specific purpose If the device has been opened modified or incorrectly con
15. ential equalisation Dimensions 25 mm length 119 mm VII S N VTI S N Pin No 2 Pin No 1 line color white line color brown Signal output PNP Power supply U Pin No 3 Pin No 4 line color blue line color black Power supply OV Signal output NPN Pin configuration 14 VSE measurement e Electronic connection data for VII S N VTI S N single pick ups 8 V 30V OV 2 white General signal processor Output signal PNP switching 1 brown 4 black RL General signal 8V 30V OV 2 x 620R processor Signal output NPN switching 15 VSE measurement Technical data for VEI S N single pick ups Supply voltage Current consumption idle Signal output circuit PNP signal output NPN signal output Signal switching frequency Electrical connection Medium temperature Ambient temperature Material Weight U 8 30 VDC 10 approx 2 5 mA idle motion U 30 V DC Transistor with series resistor R 2 x 620 Q PNP and NPN selectable by external connection High Signal U U 1 V 1 10 mA max Low Signal U 0 V I 10 mA max 3 Hz approx 500 Hz VSE standard connector M 12 20 C 85 C 4 F 185 F 20 C 60 C 4 F 140 F Anodized black aluminum stainless steel 1 4305 coil 165g Technical data for VDI S N dual pick ups Power supply voltage
16. er Is the tank clean and can any foreign material escape from of the tank and into the pipeline system Is the type of medium changed often and is the system thoroughly rinsed after changing Has all air been completely bled from the pipes and the overall system Are the seals suitable for use with the medium to be measured compatible with the seals 2 Hydraulic properties of the system Note that the flow rate range is reduced at high viscosities Does the pump have enough power to operate the system LhLbbLbLL Livy 3 Electronic processing and electrical safety Does the power supply output the required amount of power s the cable shielding connected to the ground conductor VSE measurement s the maximum operating pressure of the system lower than the maximum permissible operating pressure of the flow meter s the maximum pressure drop Ap on the flow meter below the maximum permissible pressure drop Does an exessively great pressure drop Ap occur on the flow meter at maximum flow e g with high viscosity 2 Does the flow range of the flow meter depending on viscosity correspond to the provided flow Does the temperature range of the flow meter correpond to the provided maximum temperature of the medium s the pipe cross section large enough and are there any large pressure drops in the system Are the hydraulic connections supply and return correctly connected and sealed A blocked flow meter can stop the
17. f the earth conductor PE is connected to the cable shielding and the housing of the preamplifier Voltage differences can arise between the housing of the preamplifier and the earth conductor PE of the signal processor In this case a potential equalisation ground must be The electric connection of the flow meter is performed via the 4 pin round plug located on the preamplifier housing The connection cable plug is plugged into the plug connection of the flow meter and screwed together necessary VSE supplies a corresponding connection for every type of pre amplifier see pages 15 and 17 The shielding of the cable must be routed continuously up to the flow meter and may not be interrupted in distribution racks or junction boxes Route the connection cable directly from the signal processor to the flow meter if possible as every interruption in the connec tion is a potential source of error and longer you must make absolutely sure that the connection cable is routed through an interference free environment VSE has years of experience and can provide solutions quickly to meet special requirements by modifying the mechanical and or electrical com ponents of existing solutions VSE flow meters are basically maintenance free However it is recommended to send the flow meters back to the factory at regular intervals for inspection particularly in difficult applications when critical media are used e g when using abrasive contamina
18. ient temperature 20 C 60 C 4 F 140 F Material Al Mg 4 5 Mn 0 7 Weight 125g depends on flow meter size VRI S N VWI S N Dimensions see chapter Dimensions for VHM Titan Connection for potential equalisation M4 Pin No 2 Pin No 1 line color white line color brown Signal output PNP Supply U Pin No 3 Pin No 4 line color blue line color black Supply OV Signal output NPN Pin configuration e Electronic connection data for single pick ups VRI S N VWI S N for VHM Titan 8V 30V GND OV rat 2 white General signal processor Output signal PNP switching 21 VSE measurement Signal output NPN switching e Type code signal pick ups for VHM Titan OV General signal processor Version Series Cable entry Size Sensor grounding Connection 22 Signal pick up 8V 30V Ex er 01 e N 2 Standard Intrinsically safe Threaded cable connection Plug connector with VSE standard connector standard Flow Meter O1 Flow Meter 02 not grounded O V grounded to O V optional 4 conductor connection with U I limiter 2 conductor connection without U I limiter Single channel pick up with modified carrier frequency Single channel pick up with normal carrier frequency VSE measurement VSE Volumentechnik GmbH H nnestra e 49 58809 Neuenrade Germany Phone 49 0 2394
19. leeve bushing ball bearings optional PTFE with FPM core standard or PTFE 250 bar 3600 psi 20 C 120 C 4 F 248 F 20 C 60 C 4 F 140 F 1 20 000 mm s Any See direction of the arrow on the flow meter On the mounting plate with piping connections or as a piping system custom version Note the temperature range of the preamplifier as well in this case Dimensions for VHM flow meter VHM 01 02 a a VHM 03 11 VSE measurement VHM 01 1 68 29 44 12 4 6 M6 0 760 VHM 01 2 68 29 44 18 5 6 M6 0 750 VHM 02 1 68 29 44 18 6 6 M6 0 740 VHM 02 2 68 34 44 18 6 6 M6 0 860 VHM 02 3 68 43 44 18 6 6 M6 1 075 VHM 03 2 99 50 27 10 25 81 M6 12 2 700 Dimensions are specified in mm Dimensions for AHM mounting plates AHM 01 02 for side mounting AHM 03 for side mounting Position of cable connections L E O ring 4 Signal pick up Flow meter Mounting plate for side mounting Permissible Size G A E H L M N O ring G 1 8 52 20 4 24 M6 9 4 6 07 x 1 78 G 1 4 G C G a a 24 M 111 dle 7 65 x 1 78 02 1 2 3 van NPT a 52 20 35 IMs In G G eiz 12 42 x 1 78 _ NPT van NPT Dimensions are specified in mm 12 VSE measurement Type code for VHM AHM VHM flow meter VHM Signal pick up
20. nected to the electrical circuits the guarantee of VSE Volumentechnik GmbH for safe operation is void VSE Volumentechnik GmbH is not liable in any way for personal injuries or damage to goods resulting from improper installation or improper operating of the flow meter VSE measurement Operating Instructions No E060044 E Functional description of the flow meter Flow meters from the VSE Volumentechnik GmbH measure the volumetric flow of fluids using the gear method The two gears in the meter are put in motion by the fluid flowing through the flow meter The motion of each tooth of the gear is measured by a single or dual signal pick up that is securely mounted to the flow meter When the gear rotates each signal pick up generates a digital output signal when a tooth of the gear passes through the detection area Each time a tooth passes the single signal pick up ge nerates one signal or in case of a dual pick up 2 or 4 electrical output pulses depending on the jumper settings The gap between the teeth and the housing encloses a volume of fluid that is transported out when the General description Please follow all instructions in this operating manual only this guarantees a trouble free operation of the flow meters VSE is not liable for any damage ensuing from non following of these instructions Opening the Flow Meter Selection The right choice rating of type and size of the flow meter is the deci
21. ooth mesh is called the measurement volume V This measurement volume V_ determines the value of the pulse depending on the size of the flow meter V I Imp 1 K Factor The signal frequency of the output pulse is processed in the electronics receiving the signal and is proportional to the speed of gear rotation and the flow rate The flow rate corresponds to the volume transferred which is measured continuously by electronically counting the output pulses devices during the term of guarantee is only authorised after consultation and approval of VSE properties of the devices depend on type size and measurement range as well as on the fluid to be measured Please contact VSE for exact type and size specifications ding and on every device connected to the system It must be en sured that all components meet the requirements in the EMC guide lines and that the electromagnetic compatibility of the entire system machine or plant is guaranteed All flow meters are tested according to the applicable legally required EMC directives EN 55011 and EN 61000 and are CE certified The label for EC conformity is the CE symbol which is placed on all flow meters Is the medium dirty or is there contamination and suspended particles in the medium What is the size of the particles of the solid material and could they block the meter Are the pipelines clean and free of scraps left over from the installation such as shavings or weld splatt
22. owledged engineering such as practiced in one of the member states This is herewith confirmed Beside this the paragraph declares that these devices must not have a CE marking according to Directive 97 23 EG Therefore we do not issue declarations of CE and our products are not labelled acc to 97 23 EG VSE measurement Flow measurement range The flow measurement range Q_ Qna of the flow meter specified in the data sheet is based on a test medium consisting of hydraulic oil with a vis cosity of 21 mm s at a temperature of 20 C For the measurement range with viscosities gt 10 mm s VSE specifies a measuring accuracy of up to Important Installing the flow meter The flow meter should be installed in a location with easy access so that it can be easily removed to clean the gears Since flow meters can operate in any mounting position and any direction of flow you can mount them at any location you want in your system When installing the flow meter you must make sure that there is always some fluid remaining in the flow meter and that it can never run dry even when the system is not in operation For this reason the outlet of the flow meter should always be under a slight pressure since this firmly fixes the measuring unit of the flow meter in the fluid column the measuring unit is supported in this fashion by the fluid column and the pipeline cannot drain empty In critical cases or when the
23. pipe line is at standstill or standby and can run empty it is strongly recom mended to install an additional non return valve in the outlet line Important Series VHM flow meters can be mounted with screws on a mounting plate installed in the pipe Whenever possible you should choose large diameter pipes for the piping system and large diameter lines for the hy draulic supply and return This reduces the effect of a pressure drop and lowers the flow rate in the overall system VSE supplies subplates with various pipe thread sizes and with mounting holes on the side or back for all flow meters in the VHM series Depen ding on the present conditions the installed pipe the pipe diameter or the type of pipe thread the user can choose the appropriate subplate and Make sure that the maximum permissible operating pressure specified for the flow meter cannot be exceeded in any operating mode of the system Note the flow range of the flow meter which depends on the viscosity of the medium to be measured Make sure that both the inlet and outlet of the measuring unit of the flow meter is always completely full and that there is some pressure on the outlet This prevents the creation of gas bubbles and the destruction of the measuring unit by a sudden and steep increase of flow and at the same time improves measurement accuracy 0 5 of the measured value and a repeat accuracy of 0 5 For viscosities from 1 to 10 mm s
24. r of any flow meter sent to VSE Volumentechnik GmbH will only be performed when the safety data sheet of the medi um used is enclosed and the flow meters have been completely cleaned and rinsed This serves to protect our employees and makes our job easier When these instructions are not followed the package will be retur ned at the sender s expense Size Measurement range Measured Volume V Frequency K Factor l min ml Hz imp liter VHM 01 1 0 01 1 approx 0 035 approx 5 0 476 0 approx 30 000 VHM 01 2 0 01 1 approx 0 045 approx 5 0 400 0 approx 22 000 VHM 02 1 0 05 2 approx 0 120 approx 6 9 278 0 approx 8 800 VHM 02 2 0 10 4 approx 0 225 approx 7 4 296 0 approx 4 400 VHM 02 3 0 40 8 approx 0 450 approx 14 8 296 0 approx 2 200 VHM 03 2 0 50 20 approx 1 010 approx 8 25 330 0 approx 1 000 The exact data can be found in the calibration report Measurement accuracy Repeating accuracy Materials Gear bearings Seals Max operating pressure Media temperature Ambient temperature Viscosity range Installation position Direction of flow Installation 0 5 of the measured value at viscosities gt 10 mm s 1 of the measured value at viscosities 1 10 mm s 0 5 under the same operating conditions Gear housing Stainless steel 1 4404 Gears Stainless steel 1 4462 Gear bearings tungsten carbide Preamplifier housing Stainless steel 1 4305 or aluminum S
25. red value at viscosities 1 10 mm s Repeating accuracy 0 5 under the same operating conditions Materials Gear housing Titanium Gears Stainless steel 1 4462 Gear bearings tungsten carbide Preamplifier housing Aluminum Al Mg 4 5 Mn 0 7 Gear bearings Sleeve bushing Seals PTFE with FPM core or PTFE Max operating pressure 10 bar 145 psi Media temperature 20 85 C 4 F 185 F Ambient temperature 20 60 C 4 F 140 F Viscosity range 1 20 000 mm s Installation position Any Direction of flow See direction of the arrow on the flow meter Installation Block mounting Protection class Block mounting Please also note the temperature range of the preamplifier in this case Dimensions for VHM Titan Flow meter with preamplifier Preamplifier VHM 01 22TS1 1 V L 01S00 VRLI 01800 N Standard Ex intrinsically safe Ma VWLI 01500 N Standard Ex intrinsically safe 56 69 5 12 Flow meter VHM 01 22TS1 1 N Standard S Special shaft e D D Shaft ol 25 H N 12 aa 52 18 19 VSE measurement Flow meter with preamplifier VHM 02 12TS13 1 V L 02S00 M12x1 Earth
26. ses You must remove these stoppers so that the inlet and outlet are un plugged and open before you mount the flow meter Please clean the pipes and the tank thoroughly since foreign particles and residue can get into the measuring unit and block it or even destroy it VSE measurement Flow meters are measuring sensors manufactured to high precision They have a mechanical measuring unit consisting of two gears fit tightly with small gaps between them and the housing Even the least damage to the gears or bearings will cause a measurement error For this reason you must always make sure that no foreign particles can get into the measuring unit and that the medium being measured is always completely free from contamination Once the system has been thoroughly rinsed and there are no foreign particles in the piping system you can mount the flow meter and start operations and is based on the carrier frequency principle When a dual pick up is used you simply double or quadruple the number of pulses received de pending on the setting proportional to the volume delivered The number of pulses is proportional to the volume delivered The flow rate can be derived from the frequency of this pulse signal output as a double pulse If necessary you can select pulse quadrupling by changing the internal code resetting a jumper although the max flow range is thereby reduced The volume of fluid transported and the flow rate can be derive
27. the VHM series is 250 bar 3600 psi and for VHM Titan series it is 10 bar 145 psi s the cable routed to prevent interference and can any stray pulses be coupled s the 4 pin round plug of the connecting cable screwed tightly to the connector on the flow meter Are the wires on the signal processor correctly and properly connected Does the overall system conform to the electromagnetic compatibility EMC directives as required by law Are you following all locally applicable regulations applicable rules guidelines and basic requirements for EMC Systems in which a malfunction or failure can lead to personal injury are to be equipped with suitable safety equipment The function of e Statement to EU Directive 97 23 EG Pressurized Devices in article 3 paragraph 1 1 The technical requirements for VSE flow meters VSE flow meters are pressurized devices according to article 1 paragraph 2 1 4 of above mentioned directive Therefore they are subject to the regu lations to this directive According to article 3 paragraph 1 4 VSE flow meters have to conform with the technical requirements of the guideline The fluids to be measured are belonging in most of all cases to the class 2 defined in article 9 paragraph 2 2 VSE flow meters do not reach the limit values as defined therefore are limited to the parts indicated in article 3 paragraph 3 It means the devices have to be designed and manufactured in conformity with ackn
28. ting media or media containing fillers or pigments when high viscosity media are used or when very heavy strain is placed on the measuring unit e g when the flow changes often and quickly In this manner any minor damage can be detected and eliminated early before the damage leads to total failure during production whether the failure is caused by a faulty bearing or a blockage of the gears e Maintenance and repair of devices To ensure fast and economical repair of the flow meters and other com ponents it is absolutely necessary to include a precise description of the problem or error with the package you send back to VSE Furthermore a 10 safety data sheet must also be enclosed in which it is clearly stated which medium was used with this flow meter and any potential hazards the corre sponding medium may attribute The legal regulations relating to occupational safety accident prevention regulations regulations relating to environmental protection waste dis posal and water resources law oblige companies their employees and other persons and the environment from harmful effects when handling hazardous substances If additional safety precautions are still required in spite of thorough draining and cleaning of the flow meter then this infor mation must absolutely be enclosed in the package sent back to VSE Note Technical data for the VHM flow meter VSE measurement that examination and repai
29. transistor output VSE measurement The maximum current per channel is 10 mA for an operating voltage Kmax gt 16 V DC the current depends on the input impedance of the signal processor Important The shielding of the connection cable is connected to the union nut of the plug and is thereby connected to the preamplifier housing and the flow meter For proper EMC operation of the sensor system at least one side must be connected to the grounded PE conductor This connection is usually established by the grounded pipe on the side of the flow meter You must take care of voltage differences and install potential equalisation if Important installed see the wiring diagram The maximum length of the cable between the flow meter and the signal processor is approx 120 m When long cables are used approx 40 m e Custom solutions There are some applications in which you will need a lightweight pick up for example This is often the case in the field of automation VSE offers custom solutions made of titanium that are especially lightweight If your application has other requirements please contact VSE in this regard e Maintenance and repair Only use well shielded cables for the connection cable with a wire cross section of 2 4 x 0 36 mm Please make sure that the housing of the round plug is metallic containing a connection for the shielding and that the potential o
30. white 4 black General signal processor Shielding 8 V 30V OV General signal processor Signal output NPN switching 17 VSE measurement Type code signal pick ups Single pick up M12x1 Cable entry S N ooSs I A SAL 104 OIU3N N 6088S HILO ISA Two channel pick up Earth bar o4 Flow Meter VHM With the VDB series fiber optic output the signal can only be doubled pulse x 2 18 Version Standard gg Ex Intrinsically safe Series Cable entr Plug connector with VSE standard connector a Size Flow meter VHM 01 Flow meter VHM 02 Flow meter VHM 03 Sensor grounding Not grounded to O V i Connection 4 conductor connection Standard 2 conductor connection Intrinsically safe Signal pick up Dual pick up impulses x 2 impulses x 4 Dual pick up impulses x 1 Single channel pick up with T modified carrier frequency M Single channel pick up with normal carrier frequency VSE measurement Technical data for VHM Titan Size Measurement range Measured Volume V Frequency K Factor l min ml Hz imp Liter VHM 01 1_T1 OOl approx 0 04 approx 5 417 approx 24 000 VHM 02 2_T1 005 s2 approx 0 11 approx 7 6 303 approx 8 800 The exact data can be found in the calibration report Measurement accuracy 0 5 of the measured value at viscosities gt 10 mm s 1 of the measu
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