Local Display Unit VTM (Manual)
Contents
1. Rh Diz z z E a P 5 gt gt a gt E gt us gt gt gt Di gt gt gt ee E Lo lt J 4 4 SA 02 e e fH amp tE az Oz e 3 ea abe sh ES cc Le lt I Fay Lu pr a yx a Sl a E at je lt e lt lt Uy t y y t y t y y t y y 4 2 E A a a y a y O E 2 Y Y Y Y Y y 5 D O D lt 1 de aga Ba SB 2 eeej Ses sesijasiga a a a za cJ cs cj cJ cJ cy cJ cj ar gt gt gt gt gt gt gt gt Co gt gt zj 2 Lu Lu Lu Lu 2 Lu Eu Sa nu ru AR Sa ja ZH 0000 4X 14 Programming 5 1 Starting the programming mode Simultaneously press PJ and J for 5 seconds to start the parameter programming The measuring mode will be interrupted and all outputs take a neutral state The display shows the first pa rameter level DODOMET PARANET Pressing 4 you may select from the levels PARAFET operating data and LINEAR linearisation Press P to select the first parameter of the selected level lst parameter of level lst parameter of level PARAMET operating data LINEAR Linearisation A FACTOR GP 0000 Press tJ to scroll the parameters of the level Press to start programming Having started the programming the display shows the current value of the parameter It may be adjusted by entering either numericals or selecting from presets 5 2 Entering numericals When a nume2. 5 7 Gate mem 5 5 8 Pulse time p 18 5 5 9 Divider p 19 5 5 10 Analog full scale p 19 5 5 11 A Time Response time of the analogue output p 19 5 5 12 Linear activate linearisation p 19 5 5 13 Key Res reset via keyboard p 19 5 5 14 Dis Mode display mode in the measuring mode p 19 5 5 15 Imp Out signal source of the pulse output p 20 5 5 16 A Test check of the analogue output p 20 5 5 17 Clearmem restoring defaults p 20 5 6 Level Linear Linearisation p 21 6 Installation p 22 6 1 Installation on flow meter p 22 6 2 Positioning the VTM housing p 22 6 3 Positioning the display p 22 1 General 1 1 Application The VTM is a programmable local display with integral carrier frequency pickup and amplifier for KEM flow meters It serves the evaluation of flow volumes Measuring results are indicated in an 8 digit LCD display with 14 segments The pulse output provides a flow proportional frequency signal or scaled volume pulse in accordance with programming Optionally the measuring signal may be scaled in a 4 20 mA current loop The display is available in two different arrangements to fit various installing positions see drawing p 6 The electronic housing is slewable by 360 in addi tion the display unit may be positioned in steps of 90 see p 22 These features guarantee for an excellent readability independent of the installing position For electrical connection a 6 pin plu
3. DIVIDER Select with f and save with operation 5 5 16 A TEST Check of the analogue output The analogue output may be checked with respect to perform lt E gt gt A TEST ance and linearity pl o o Three preset output values are available via keyboard lt scan gt E E i hift gt Y Press 4 lect from the presets Via gt sh lt shift gt in lt shift gt Be ess t to select from the presets Via s own a S 1 OFF 4 00 ON 400 k the diagram you may turn the current modulation either on or off Press to quit the test lt scan gt lt shift gt y lt scan gt lt shift gt OFF 12 0 ON 12 0 lt scan gt n lt scan gt lt shift gt y lt shift gt Y OFF 19 5 ON 19 5 E 29 ya lt scan gt lt scan gt 5 5 17 ELEARMEN Restoring defaults This function will restore the defaults erasing all parameter adjustments and counts Having selected the mode via P the display shows P LERR To quit press To restore defaults press P Afterwards the E with all operational parameters and counts will be erased During this process the message CLEAR CLEAR will ap pear in the display 20 VTM User s Manual Programming 5 6 Level LINEAR Linearisation The mean K factor of the flow meter defines a pulse rate per volume unit which contains an error over the co
4. Meas mode not displayed DIS MODE TEST M0D DIS MODE MESS MOD es es no no no no no no Kfactor flowrateunit yes no es programming counter none yes no OlOIN JA UIA TWIN lt 4 IO 4 1 1 Real time value measuring mask Q The real time value is indicated in accordance with the adjusted flow rate unit FLGw Gifi and decimal point posi tion FLGW OP The calculation is based on the currently measured frequency and the K factor of the flow meter The calculation is upgraded every 0 5 sec corresponding to approx 2 Hz The internal upgrading and resultant response time of the analogue output and divider depends on the parameters GATE TIE and A TI E 4 1 2 Totals measuring mask V The integral totaliser of the VTM adds the transmitter pulses standardised in the adjusted flow rate unit FLO4 Hifi Thus flow rates over a long period of time may be detected The decimal point position depends on the adjusted flow rate unit The VTM will automatically display totals as accurate as possible Example flow rate unit m3 h Totals are indicated in m3 e g 12 345 M If the measuring value exceeds the display range it will be assigned accordingly e g 1234 567m3will be dis play as 1234 56m gt If the measuring value is too high to be displayed by fading out digits it will be displayed using exponential notation e g 1234567 89m3 will be displayed 1 23E06 The totaliser may be reset via key provided that the parameter M
5. defines the no of pulses per volume unit m3 over the entire measuring range of the flow meter The linearity error of the mean K factor over the entire measuring range is also shown in the calibration record In addition to the mean K factor and error the calibration record does also include K factors and errors at certain flow rates With constant flow rates you may reach a higher accuracy by selecting the K factor which is the closest to the flow rate in your application Select the desired unit m or 1 via and confirm with The K factor will be entered in pulses per litre or pulses per m3 Enter the number for each position via the 4 Jand gt key The decimal point may be moved via the PROG key Press J to save 16 VTM User s Manual Programming 5 5 2 FLOW BIf flow rate unit Your selection will apply for the real time value and totals as well as the scaling of the indicated value ana logue output and pulse divider The unit itself is not indicated You may select from the 15 presets which can be scrolled via 4 Press E to save and proceed Respective stickers which may be fitted on the VTM are included Preset L MIN L H UZMIN KG RIN BG H G MIN G SEC GALAN GAL H LB MIN LB7H operation preset FP RIN M H CO PIN CC SEC operation Example Flow rate unit is l min The real time value is indicated in ltr min and totals in litres Programming of the analogue full scale and pulse divid
6. E3 RES is programmed accordingly KEM 11 Measuring mode The following masks are only available in the test mode of the display cf p 18 4 1 3 Direct measuring frequency measuring mask 2 With start up or service requirements it may be of advantage to indicate the transmitter frequency Select mask 2 pressing tJ wait until the code 2 appears in the left hand section of the display The direct measur ing frequency is indicated with resolution of 1 10 Hz i e G000 8 4 1 4 Gate frequency measuring mask 3 With the GATE Tifi parameter you may define a measuring period and the frequency measuring result will be a mean value over this period Select mask 3 pressing J wait until the code 2 appears in the lefthand sec tion of the display The gate frequency is indicated with a resolution of 1 10 Hz i e 0000 0 4 1 5 Direct transmitter pulses measuring mask 4 This measuring mask shows the unscaled transmitter pulses in the format 6 000 The mask may be used for calibrations on site or reference measurements When the number of pulses exceeds the display range of 6 digits this mask will behave like the measuring mask V totals cf p 10 The totaliser may be reset via key provided that the parameter 4ES RES is programmed accordingly 4 1 6 D A value measuring mask 5 This measuring mask shows the decimal value of the D A converter which is derived from the measuring frequency and scaling The D A converter ha
7. K Factor in programmed unit measuring mask 8 The A FALTOR defines the calibration factor of the VTM which can be found in the calibration record The K factor is usually stated in pulses volume unit e g 376000 pulses m In this mask you can see the K factor converted in accordance with the programmed flow rate unit Example K factor 376000 Imp m flow rate unit gal h gt volume unit gal US 376 Imp dm3 x 3 7854 dm3 gal 1423 31 Imp gal gt display 1423 31 4 1 10 Programming counter measuring mask 9 This counter registers how often the programming mode has been started You may use this to check whether parameters have been changed since the last programming KEM 13 Programming VTM User s Manual E a IE je 5 E t E amp amp ac E i Z co r gt Pu cS 3 EL Ex Ea Cc Dz S S E wel S See SaS Q A Sy yf T T gt E ca LO Diz EL un pea a e E 5 S nt eh zz S S a te aes mle 1S la 5 Programming Keep Pjand pressed for 3 seconds P G ee P Ll I gt MESSMODE
8. TECT DEF Calculation of all working parameters fool REO WO On successful check of all data the VTM will automatically activate the meas uring inhi mode and display the current operational parameters in accordance with the selected measuring mask Please note o coo A D Parameter are saved twice in different banks of the EEPROM In case of deviations PTELNANUIN between both parameter banks the display will show an error message Press J to restore all defaults and reset the totaliser to 0000 Afterwards the operation software will start the programming mode and parameter settings may be repeated Please note The restoring of defaults may be started manually at any time cf programming of parameter CLEAR 3 1 Error and status messages During the measuring mode of after programming the following messages may appear in the display Message Description CLEAR erasing EEPROM data memory P ERRGR parameter error in EEPROM proceed with OVERFLOW display range exceeded measuring value cannot be indicated SET DEF set defaults in MPU RAM W cut off frequency passed READ DAT copying data to MPU RAM TEST REG calculating operational parameters WRITE writing data in EEPROM KEM 9 Start up 3 2 MPU programme flow chart The scheme shows the job stream of the MPU unit and the operation facilities during the measuring mode considering the parameters 4EY RES and DIS MODE connect power copy data to MPU message READ GAT type messag
9. VIM User s Manual As of version V 09 10 00 l K ppers Elektromechanik GmbH Quality system certified to DIN EN ISO 9001 VTM User s Manual Contents 1 General p 4 1 1 Application p 4 1 2 Ordering Inforamtion p 4 2 Specifications p 5 2 1 Technical data p 5 2 2 Dimensional drawings p 6 2 3 Functional diagram p 7 2 4 Outputs p 7 2 4 1 Pulse output p 7 2 4 2 Analogue output p 8 2 5 Notes on installation p 8 3 Start up p 9 3 1 Error and status messages p 9 3 2 MPU programme flow chart p 10 4 Measuring mode p 11 4 1 Measuring masks p 11 4 1 1 Real time value p 11 4 1 2 Totals p 11 4 1 3 Direct measuring frequency p 12 4 1 4 Gate frequency p 12 4 1 5 Direct pickup pulses p 12 4 1 6 Digital Analogue value p 12 4 1 7 Analogue out factor p 12 4 1 8 Divider in direct pickup pulses p 12 4 1 9 K Faktor in programmed unit p 13 4 1 10 Programming counter p 13 KEM 5 Programming p 14 5 1 Start the programming mode p 15 5 2 Entering numerical parameters p 15 5 3 Selecting from presets p 15 5 4 Level Paramet operational parameters p 16 5 4 1 Table of parameters p 16 5 4 2 Invalid programming p 16 5 5 Parameters p 16 5 5 1 K factor of the flow meter p 16 5 5 2 Flow Dim flow rate unit p 17 5 5 3 Flow DP decimal point p 17 5 5 4 F Cut cut off frequency p 17 5 5 5 Density p 17 5 5 6 Gate p 18 5
10. coming frequency fast or based on the meaning calmed frequency slow The calmed frequency is calculated in accordance with the adjustments for parameters GATE TIE operation Select with f nd save with 5 5 12 LINEAR Activate linearisation This parameter can be used to either activate or deactivate the 10 presets LIN OFF LIN ON point linearisation for real time values and analogue output With meaning active linearisation the VTM will correct the measuring frequency according to the programmed error and frequency figures The pro operation gramming of these figures is performed in level LINEAR see page 20 5 5 13 AEY RES Reset via keyboard presets The totaliser of the VTM may be reset via keyboard when EY RES is meaning selected here Select with and save with operation 5 5 14 DI5 MBDE Display mode in the meas mode For the usual measuring mode select MES5 MBB for this presets TEST M0D MESS MOD parameter which includes the real time values mask Q meaning Q and V mask and totals mask V For start up or test purposes the TEST M0B offers further operation measuring masks For details see page 10 Select with and save with KEM 19 Programming 5 5 15 iffP GUT Signal source pulse output presets DIVIDER MPREQU The pulse output may either provide the transmitter meaning divided frequency transmitter freq frequency or volume mass proportional pulses cf parameter
11. e VTi software version message 09 10 00 e Y calculating parameters message TEST REG message GKAY active measuring mode process analogue output process pulse output display values process totaliser y display meas or test screen e g Q 0000 00 m h measuring value cannot be indicated message GVERFLOU yes yes reset of totaliser lt select next meas or test screen outputs neutral yes yes programming parameters yes 10 VTM User s Manual Measuring mode 4 Measuring mode The measuring mode allows for indicating either real time values or totals Press tJ to select the desired meas uring mask On the furthest left hand digit your selection is indicated by a for real time value or Y for totals The way of indication decimal point flow rate unit etc depends on the adjustments in level PARAMET In case the special character ij should appear right to the display description or the cut off frequency parameter F CUT has been passed For start up or test purposes the display mode may be changed to test mode by programming the parameter OS fiGGE to TEST MBD cf p 19 In the test mode the display may indicate up to 10 different measuring masks as listed in the table below 4 1 Measuring masks Meas mask Display Unit Start up
12. er are effected in ltr min and litres respectively 5 5 3 FLOW DP Flow decimal point The adjustment applies for the indication of real time values decimal point 0000 000 0 00 00 0 000 meaning BETO 1 10 1 100 1 1000 operation 5 5 4 F CUT Cut off frequency When the flow rate bypasses the minimum flow range of the KmA flow meter the output frequency will be outside the linear range of the meter The frequency corresponding to the nA minimum flow range see calibration record is called cut off frequency The analogue output display and limits will not work below this frequency The analogue output takes its offset value the real time values are display 0000 and the limits are out of operation Lama The decimal point position for the cut off frequency is fixed to 000 Hz Press f to programme the value for each digit 4mA Press gt to move and EJ to save 0 Fecheich fma 5 5 5 DENSITY Specific gravity of the measuring medium In case a mass related unit was selected for the flow rate you may enter the density of the measuring medium in kg m and the MCM will calculate the measuring values considering the K factor and density The decimal point may be moved via the P key Please note when a volumetric unit e g ltr min was selected for the flow rate the VTM will skip the density programming KEM 17 Programming 5 5 6 GATE Gate time Measuring time The parameter gate time enables yo
13. g or a junction box with 6 internal terminals is provided 1 2 Ordering Information VIM KKK KK Ex t Ex protection electrical connection cover pickup display arrangement signal output Ex Ex protection ATEX 100a EX II 2 G EEx ia IIC T4 K junction box S protective cover with glass window K for ZHM 02 to 04 and HM series R for ZHM 01 01 1 and 01 2 as well as SRZ series S centre pickup for ZHM series D top view B frequency output divider and analogue output VTM User s Manual 2 Specifications 2 1 Technical Data General LCD display 8 digits 14 segments digit height 7 mm for real time value totals and programming slewable in steps of 90 after losening the fixing screws ambient temperature 40 up to 70 C medium temperature 40 up to 120 C with a distance of at least 25 mm between flow meter and electronic housing electrical connection junction box with 6 internal terminals 1 ale UB Imp 2 mala Out Imp 3 ae Com Imp 3 4 2 4 ele IA 2 5 5 am lA 1 6 shield Ex protection ATEX 100a EX II 2 G EEx ia IIC T4 BVS 03 ATEX E 205 safety relevant data as per Ex certificate protection class IP 65 housing aluminium AlMgSiPb blue anodised slewable by 360 Frequency output divider operating mode 3 wire supply voltage 8 30 V DC controlled quiescent current IR lt 25 mA signal output push pull Imax 20 mA 1 freq
14. meaning operation 18 VTM User s Manual Programming 5 5 9 DIVIDER Dividing factor for the pulse output In order to detect the flow rate with an external counter the VTM may divide the frequency signal of the transmitter in a way the pulse output will generate a volume or mass proportional pulse You may now programme the dividing factor with a value that shall correspond to one output pulse Please consider the following when programming The flow rate unit as per FLOt4 B f applies e g m3 h or l min The parameter IfP OUT has to be set to DIVIDER The maxfrequency of the pulse output must not exceed 500 Hz Example An external totaliser shall count integer m gt Select m3 min or m3 h for FLGW Gii Enter 1 000 for the dividing factor and each output pulse will correspond to 1 m3 The internal totaliser of the VTM is not affected by the dividing factor 5 5 10 ANALOG Analogue output full scale The VTM may provide a flow proportional current signal of 4 20 mA You may now enter the real time value which shall correspond to 20 mA flow rate unit according to parameter FLOt B1f For a maximum accuracy this parameter allows for moving the decimal point independent of the adjustment for FLOW BP Press P to move the decimal point to the desired position Save with 5 5 11 A TIME Response time analogue output The FAU can convert the measuring frequency into an analogue presets OUT FAST OUT SLOW signal based on the in
15. mplete measuring range The linearisation allows to compensate for this error by entering 10 linearisation points over the measuring range i e 10 frequencies with their respective errors This will enable you to re duce the measuring error to the repeatability which is usually 0 1 for KEM flow meters Having selected parameter level 2 press PJ to start programming the first frequency Linearisation point no Enter 4 digits in Hz no decimal digits Frequency code The programming starts off with the first frequency 0P You may enter the frequency figures using the and key Frequencies are to be entered as integer numbers in Hz The figures can be found in the calibra tion record of the flow meter On completion of this parameter you are requested to enter the respective line arity error The display shows the following Enter 2 digits in one decimal digit i Error code Sign of the linearity error The linearisation point no is automatically maintained Use P to select the sign of the error either or Enter the linearity error with one decimal digit in 1 10 via and gt On completion the MCM will automatically go back to the frequency display for programming the next fre quency This process will repeat until a frequency has been programmed as 0 or when 10 linearisation points have been completed last linearisation point no is 9 After saving the last error the VTM goes back to the parameter le
16. nput KEM Specifications 2 4 2 Analogue output 4 20 mA The primary current of 4 mA powers the entire electronic of the VTM The measuring signal of up to 16 mA is added resulting in a current consumption of 4 to 20 mA The wiring may be taken from the scheme below VIM 4 20 mA power supply with evaluation 4 20 mA shield 2 5 Notes on installation Connect metal housing with PE Built in devices have to be installed in a metal housing connected with protected earth Observe a low impedance connection of PE and a measurement of the PE resistor according to VDE 0701 Also observe a sufficient shielding for the employed cabinet Keep distance Keep current carrying cables at least 30cm away from the VTM Only shall indicated terminals and contacts be used for power supply Keep mobiles ISM units or switching inductivities like engines or solenoid valves at least 2 metres away from the digital measuring and control electronics Avoid sources of electrostatic charges in the closer environment of the VTM Operators should also consider appropriate clothing and wear of shoes with discharging ability Avoid parallel arrangement of current carrying cables 8 VTM User s Manual Start up 3 Start up After connecting the power supply the following messages will appear in the display DCO D D OT All outputs take a neutral state Parameters in the E are being read ROLL Type ITT yP L I Software version V 22 07 99
17. rical parameter appears in the display the up right hand digit will flash asking you to enter a value to select the decimal position The present position is flashing each pressing will increase the value by 1 0 1 2 3 9 0 1 depending on the parameter each pressing will move the decimal point by one digit in lefthand direction to save the adjustment Afterwards the display shows the parameter name again to select the next parameter P to start programming E to quit the programming mode q prog 8 5 3 Selecting from presets For some parameters e g flow rate unit you may select from presets Having selected such a parameter you may scroll the presets pressing El When the suitable unit appears save with The parameters concerned and their respective presets can be found from page 16 onwards KEM 15 Programming 5 4 Level PARATET operational parameters 5 4 1 Table of parameters A detailed description can be found on the following pages Parameter Description Function Unit Default IMP QUT source for the pulse output none DIVIDER 5 4 2 Invalid programming Invalid values or values which are not included in the respective range will be erased after pressing Af terwards the last value will re appear in the display and you repeat programming 5 5 Parameters 5 5 1 KFACTOR K factor of the flow meter Each flow meter is supplied with a calibration record indicating the mean K factor This factor
18. s a resolution of 12 bit corresponding to 4 095 steps of resolution for 16 mA 4 20 mA The display shows 8068 corresponding to 4 mA and 4035 corresponding to 20 mA Example With 6 000 m the analogue output provides 20mA 16 mA modulated 4 mA primary current The display will show 4835 If the actual flow is 3 000 m3 the display will show 2848 corresponding to 8 mA modulated current 4 mA primary current The analogue output provides 12 mA 4 1 7 Analogue out factor measuring mask 6 This mask shows the internal analogue scaling factor which is calculated by the ratio of the converter resolu tion 12 Bit 4095 and the frequency which corresponds to 20 mA This frequency is calculated considering K factor flow rate unit decimal point and the analogue full scale value Example Frequency with analogue full scale of 6 000 m3 h 234 56 Hz Calculation 4095 234 56 Hz 17 458 i e with each Hz the D A converter will be increased by 17 458 steps which is displayed in measuring mask 6 4 1 8 Divider in direct transmitter pulses measuring mask 7 The programmed dividing factor in flow rate unit is converted into measuring pulses via the parameter K FACTOR This mask shows the number of transmitter pulses corresponding to one divider pulse Example K factor 835 21 pulses m3 dividing factor 0 130 m Divider pulses 835 21 Imp m x 0 130 m 108 577 pulses gt display 103 12 VTM User s Manual Measuring mode 4 1 9
19. u to adapt the temporary transmission behaviour between frequency and analogue output to your requirements After the gate time has passed the VTM calculates an average frequency for the measuring interval thereby calming signal fluctuations Periodic disturbances e g pressure fluctuations will be included in the displayed values if the gate time is too short You may avoid this by choosing an appropriate interval Example flow variations with a period of 0 5 seconds require a gate time of gt 0 5 seconds You may select intervals from 507 msec to 3042 msec in steps of 507 msec via the f key Save your selection with presets 507 1014 1521 2028 2535 3042 meaning operation 5 5 7 GATE MEN Gate Memory This parameter determines the number of measurements which will be considered for calculating the actual measuring frequency the response time of the measuring results depends on the gate time setting With n gt 0 the VTM calculates an average value considering the last n measurements and the actual measurement This way unique or rare disturbances are prevented from fully affecting the measuring results Adaption of both parameters gate time and memory enables for any temporary behaviour whatever 5 5 8 PULS TIM Pulse time of divider output In order to further process the divider output signal by additonal units preset counters PLC etc 3 different the pulse time adjustments are available presets
20. uency output fmax 3 000 Hz duty cycle approx 1 1 2 divider pulse width 1 ms 20 ms 50 ms fmax 500 Hz Analogue output operating mode 2 wire 4 20mA supply voltage 14 30 V DC controlled UB Rload x 20 mA 14 V load lt 800 Q resolution 12 bit 3 9 A time constant slow or fast programmable under A TIME signal output 4 20 mA KEM 2 2 Dimensional drawings mm display arrangement front view display arrangement top view 50 e E M5 H L 103 front view with protective cover 93 148 148 85 95 top view with protective cover 79 EE 97 Specifications junction box junction box 135 178 125 VTM User s Manual Specifications 2 3 Functional diagram display ZS pickup micro processor 6 ES shield 2 4 Outputs 2 4 1 Pulse output The VTM may optionally be equipped with a pulse output which can either provide standardised pulses e g in m or the direct measuring frequency of the flow meter programmable via parameter fi GU7 The wiring is as follows VTM pulse output pulse counter only for supply of the galvanically separated pulse input stage pulse i
21. vel error Calibration Diagram Figures for frequencies and errors can be taken from the table of the calibration re cord KEM 21 6 Installation 6 1 Installation on flow meter 1 Screw the VTM a hand tight into the flow meter b without using force Be careful not to damage the sensor tip 2 Slacken VTM by 1 4 turn to avoid metallic contact between pickup tip and the bottom of the pickup bore 3 Tighten the locknut c 6 2 Positioning of the VIM housing 1 Slacken grub screws a 2 Move housing to the desired position b 3 Tighten grub screws 6 3 Positioning the display 1 Unscrew the four fixing screws a 2 Remove the top and turn it in any direction b you like in steps of 90 c Please ensure the supply core is not twisted by more than 270 3 Put on the top and screw in the fixing screws Subject to change without notice V 09 10 00 Zi Rev 001 04 07 22 VTM User s Manual
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