EM20 v3.21 User's Manual.indd
Contents
1. a PC EM20 has a real time clock that runs also without any mains power connected and the instrum net turned off This real time clock is used when logging All data stored in the logmemory of the EM20 remains when the instrumnet is turned off and of course when the instrument is transported With the standard PC programme delivered with the instrument EM20 EXE all the functions of the Energy Meter EM20 can be controlled It is also possible to adjust the internal real time clock the temperature calibration voltage and current calibration Also the Log functions can be set and the logged data transferred to the PC The Programme can display det measurementvalues in either tabel form or in graphic form Measurementdata can be saved in and read from an ASCH txt file At the push of a button all measurementdata is transferred to the Clip board Page 2 EuroDidact mail eurodidact com http www eurodidact com Description The numbers refer to Fig 1 Front 7 8 9 10 11 12 13 14 Rear 19 20 21 22 18 17 16 Fig 1 Overwiev of the Energy Meter Typer EM20 FRONT PANEL 1 POWER 2 RESET 3 STARI STOP 4 LOGGING ON 5 LOAD 6 SUPPLY T FRONT REAR 8 REAR 9 FRONT 10 Display 11 X1000 12 FUNCTION A 13 FUNCTION vV 14 Function indicator REAR PANEL 15 RS232 INTERFACE 16 OUTPUT 230V AC 17 SUPPLY 230V AC 18 POWER 230V AC 19 FUSE 0 5AT 20 FUSE10A 21 TEMPERATURE 1 22 TEMPERATURE 2 Eu2. measurement data from the memory COMport Select the PC serial comport COM 1 or COM 2 Temperature reading in oC or oF and selection of language Instrument Setup Programme info If an EM20 is connected this instrument version Frogramm lintormation is also displayed Exit Exit ends the programme Page 6 EuroDidact mail eurodidact com http www eurodidact com In the menu Calibrate the following may be set ja ah Pak Date and Time _Date and time Adjusting the real time clock of EM20 In the upper part date and time from EM20 is displayed In the lower part the date and time can be entered Datalogging menu Datalogging Automatic D atalogging from Instrument Manuel Datalogging from Instrument Read Data from Instrument FA Start Shop of Automatic Datalooomg Shitt F4 In the menu Display the following is available Display Voltage NI Ctt Curent Ctrl True Pomer w Cl S Heschve Power MA LidAD Apparent Power MA BI Frequency Hz Lid phi Ltil P cos phi Ctrl C cosphi id Energy W s CAE E nergy wh Ctl H Time Sec Cl Temperature 1 Ctrl 1 This is where to select what is displayed on the EM20 display and if measurements are made on the front panel or on the rear panel Temperature Ctre Heading from Frontpanel Ctrl F Reading from ARearpanel Chef In the menu Energy Reading the following options are available Eneray Reading Show
3. PuroDidact Energy meter Type EM20 FUNCTION ooo dh oy eva E awe e Bi He iima 06 i ow Sey BT LOGGING wa Grapp Ta ken sun STOP User s Manual Version 3 21 English EuroDidact mail eurodidact com http www eurodidact com Overview EuroDidact Energy Meter Type EM20 is a microprocessor controlled instrument for measu ring energy and energyconsumption Also the EM20 measures 2 temperatures simultaneusly EM20 can be used as a stand alone instrument or in connection with a PC Delivered with the instrument the windows programme can be used for remote control of the instrument adjusting and datalogging the data from the instrument Also delivered with the instrument is a cable for connecting the EM20 to a PC s serial port COM1 or COM2 EM20 has the following inputs d Rear 10 240 V us AC Max 10 A us 45 65 Hz d Front 0 30 Vus AC Max 10 A us 16 999 Hz 0 42 V DC Max 10 A us i Two standard type K Thermocouple inputs With these the instrument measures from 100 C to 450 C All measurements are displayed on the 4 digit LED display Display reading from front or rear is selected with a push button Selection from the possible readings is done with two push buttons The Instrument has a logging function Start of the log can be done manually at a given time or if a preset limit is crossed or if a tem perature limit is crossed both ways Setup can only be done via
4. We in Chart Show Wb in Chart Show kwh in Chart In the menu Graphs the following options are available Graphs Show Graphs Update Graphs Graph Preferences Print Graphs Page 7 EuroDidact mail eurodidact com http www eurodidact com In the menu Log the following data are selectable Logging Setup Here it 1s possible to mark each data that is to be logged and at what interval The more data to log at each interval the fewer log lines are possible For maxi mum number of intervals log lines select only the data that is necessary The maximum number of log lines and the maximum logging time is calculated and displayed Automatic or manual logging 1s set here After logging 1s finished the data are trans ferred from the EM20 using this window Data to be Logged Voltage W Sec interval ae Current A fo Active Power Reactive Power M t Apparent Power MA Wis l Time Frequency Hz phi l cos phi cosphi l Temperature 1 l Temperature 2 Download Log Start Stop Auto f Man Logstart Read Log Info Graph Preferences ShowGraph Graph oltage gt Graph Current A Display of Graphs Using Graph Preferences or F7 it is possible to select dis play of 1 2 or 3 graphs how to display them Show points Show lines between data Show all graph Show grid and select the data to be sh
5. entered and transferred to the EM20 by selecting Download Calibration of voltage and current This is only possible if ALLOW CALIBRATION TILLAD_KALIBRERING is set to 14 in the EM20 ini file If the voltage and current is to be calibrated the line TILLAD KALIBRERING in the EM20 ini file is changed from 0 to l before the EM20 PC programme is started For editing use a text editor like Notepad The EM20 ini file is located in the same directory as EM20 exe Calibration of the voltage and current is now run from the PC programme Menu Calibrate Voltage and current The shown values are transferred from the EM20 Offset for voltage and current measurements are adjusted by selecting Measurement on front panel shortcircuit the input bushings SUPPLY and selecting Adjust offset A value for the offset is displayed on the screen Fullscale values are adjusted seperately for voltage and current on the frontpanel and the rearpa nel The new values are transferred to the ME20 by selecting Download Page 10 EuroDidact mail eurodidact com http www eurodidact com
6. isplayed L d d F when started the log is set to default 1 e all values are log ged with 60 seconds interval Change of the log setup is done with the PC programme Logging is started and stopped again with the button START STOP When logging is started the LED LOGGING ON is lit If the log is full the LED LOGGING ON is flashing At every start of the log function the value of Ws Wh and Time is reset to zero At logging means values of the measurements since last logging are saved The content of the log is cleared by pressing the button RESET twice The display shows C I r before the second push of the button Page 4 EuroDidact mail eurodidact com http www eurodidact com Display messages In some cases the display is text rather than values of measurement The following list axplains the text Display At Description r x x x Startup Instrument software version no 1 e r 2 0 1 LddF Startup Warning Default values for voltage current and temperaturemeasurements and setup of log are read Always If data is not available or data is not ready Clr Reset of log Warning before second push at RESET Full Start of log Warning by attempt to start the log when this 1s full Lo U Hz Voltage is too low for measurements under 1 0 V The frequency can not be measured Hi U V Too high voltage outside range Hi A A Too high current outside range Lo F Hz Too low fre
7. on least significant digit O 10A TOLA as 1 1 on least significant digit 45 65 Hz 2400 W 0 01 0 1 1w 2 1 on least significant digit 2400 VAr Only true at sinus 0 01 0 1 1 VAr 2 1 on least significant digit 2400 VA Only true at sinus 0 01 0 1 1 VA 2 1 on least significant digit DC og 16 999 Hz 0 1 Hz 1 1 on least significant digit 0 90 0 1 1 1 on least significant digit 0 999 0 000 0 001 1 1 on least significant digit 0 999 0 000 0 001 1 1 on least significant digit 0 0 9999 x 1000 Ws Wh 0 1 Ws 0 001 Wh 2 1 on least significant digit 0 9999 x 1000 1 sek 0 1 100 C 450 C 0 1 C 1 1 on least significant digit Page 9 Instructions for Calibrating only by skilled technician Note The instrument is calibrated from the factory Calibration of the temperature measurements is done with the PC programme Menu Calibrate Temperature The temperatureer ror is adjusted for each input untill the display is correct The displayed Temperaturecorrection is transferred to the EM20 when the indication Down loaded on the screen is green Calibration of date and time is done with the PC programme Menu Calibrate Date and time In the top part of the window the actual date and time from the EM20 is shown In the lower part the new date and time may be
8. own on each graph Graph Preferences l Show Points M Show Lines kW Show Full Graph M Show Grid Datalogging mode selection It is possible to select one of two datasampling modes Automatic datalogging from EM20 Data are collected from EM20 at an adjustable intervall from 1 to 60 Seconds Manual datalogging from EM20 Data are collected from EM20 at the push of Read data from instrument button or F4 The instrument always starts in Manual datalogging from EM20 Page 8 EuroDidact mail eurodidact com http www eurodidact com Technical information Mains Measurements on frontpanel Measurements on rearpanel General EuroDidact mail eurodidact com http www eurodidact com 230 V AC 10 50 Hz Voltage Resolution Accuracy Current Resolution Accuracy Frequency Voltage Resolution Accuracy Current Resolution Accuracy Frekvens True Power Resolution Accuracy I Reactive Power Resolution Accuracy Apparent Power Resolution Accuracy Frequency Resolution Accuracy Phaseangle D Resolution Accuracy cos Resolution Accuracy cosphi Resolution Accuracy Energy Ws I Wh Resolution Accuracy Time Resolution Accuracy Temperature 1 and 2 Resolution Accuracy AC 0 30 Vays DC 0 42 V 0 01 10 1 Ving 1 1 on least significant digit Oe TOD a 0 01A 1 1 on least significant digit DC to 1000 Hz 10 240 V s 0 01 0 1 Vius 1 1
9. quency below 16 Hz H i F Hz Too high frequency above 999 Hz dec HZ At DC Page 5 EuroDidact mail eurodidact com http www eurodidact com PC programme EM20 Installation of the programme Insert the CDROM in the drive i e D From Windows FileManager find the sub folder with the EM20 s w and run the programme lt SETUP EXE gt Use Target button to select where to install the programme typical C EM20 Start the installation with the Start button The installationprogramme installs then the programme on the harddisk and setup a programmegroup EuroDidact Instruments containing the icon EM20 Se Fig 2 Energy Meter Type EM20 Version 3 00 Copyright fc 2001 EuroDidact Target Processing File Fig 2 Installationprogramme The programme is started by clicking the icon EM20 When the instrument is connected correctly the programme automatically fetches the instruments actual selections See example below in Fig 3 ENERGY METER File Calibrate Datalogging Display Energy Reading Graphe Log GE Siche i TS BE RA A EA ES iv a we var EES EES E EE A2 SK Ho Date Hr Vv A W VAr V Ws Sec Hz phi cosiphi cosphi T Tea Ft a a e t Fig 3 Example from the programme EM20 In the menu File the following selections are awailable Upen Data Opens a file containing measurement data sae Plate al Saves the measurement data to a file Delete Data Deletes
10. roDidact On Off button Push button for deleting the log and reset of Ws Wh and Time At the first push the CLR is displayed and at the second push the log is reset Push button for start and stop of logging Starting the log also resets Ws Wh and Time Light Emitting Diode LED is constant turned on when the logging has been started LED is flashing when log memory is full logging is stopped Connection for load on the front panel 0 10 A Connection for supply on the front panel 0 30V AC 0 42V DC Push button for selection of measurements on the front panel or the rear panel LED indicates that measurement on the rear panel is selected LED indicates that measurement on the front panel is selected 4 digit LED display LED indicates that the display reading is to be multiplied by 1000 Push button to step backwards in list of Functions LED indicated Push button to step forward in list of Functions LED indicated LED s 12 pcs for indication of the selected function RS232 interface for PC Connection of load on the rear panel 0 10 A Connection of the supply on the rear panel 10 240V AC 230V AC Mains inlet Mains fuse 0 2 AT preferred or 0 5 AT max Fuse for 230 VAC outlet on the rear panel 10 A Connection of Thermocouple type K input no 1 Connection of Thermocouple type K input no 2 Page 3 mail eurodidact com http www eurodidact com Instructions for use Po
11. ssible Updates to this Leer e Manual and the software can be downloaded free of charge from our website http eurodidact co uk The instrument is turned on with the mains switch marked POWER When the instrument is turned on first the version no 1 e r 1 00 is displayed If one or more of the calibration values of the EM20 is outside the limit the message L d d F Load default is displayed and the default values are automatically loaded The instrument starts with the same selections as when it was shut off and is immediately ready for use Voltage supply and load may be connected on the front or rear panel With the button FRONT REAR the front or rear measurement is selected All parameters are measured and calculated every second With the buttons FUNKTION A and FUNKTION V the parameter to be shown on the display is selected Display parameters possible V True RMS Voltage A True RMS Current W True Power VAr Reactive Power Only at sinus Calculated as VA WII VA Apparent Power Only at sinus Calculated as Ui bes Hz Frequency 0 Phaseangle measured COS cos phaseangle LED is flashing cosphi Calculated cosphi Calculated as W VA Ws Energy in Ws Wh Energy in Wh Ws LED is flashing Time Time for Ws Wh in seconds T1 Temperature 1 From thermocouple type K sensor no 1 T2 Temperature 2 From thermocouple type K sensor no 2 Use of the Log Function If the instrument d
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