DM45 v2.22 user manual.p65
Contents
1. dc and resistance in Ohm Temperature meter with standard input for thermocouple NiCr Ni type K and a temperature range from 50C to 1200 C pH meter with standard BNC input for combination pH electrode Remote Display DM45 can also function as a Remote Display for another EuroDidact instrument or a balance and other measuring instruments with RS232 output In addition to this the user has the possibility to program a PC to write the display any characters signs possible Two different Remote Dis play configurations in the DM45 at the same time are available The instrument is powered by activating the switch marked POWER Immediately on power on the instrument displays the version number i e R 100 for approx 2 secs The DM45 is now ready for use First select the function instrument with the push button Function select 2 The selected function is indicated with a lit LED Multimeter First push the Function select 2 to select the function Volt Amp and then with the V A Q select 5 push button select between V e Vac Apc Aye and 2 Use push button Shift 44 amp w 4 to select the range Test leads are connected to the inputs At voltage and resistance measurements Com and V Q At current measurements lt 4A Com and mA At current measurements gt 4A Com and 40A No fuse on this input A WARNING The Com bushing is connected to chassis Only connection of touch safe2. 1 1 on least significant digit The interface is galvanically separated from the measurement circuits of the DM45 Page 13 EuroDidact mail eurodidact com http www eurodidact com Page 14 EuroDidact mail eurodidact com http www eurodidact com CDROM Page 15 EuroDidact mail eurodidact com http www eurodidact com
3. Enter PRIDATE Enter arrow up down until FF Enter PRITIM Enter arrow up down until FF Enter REFEREN Enter arrow up down until FF Enter LOCK Enter arrow up down until FF Enter EXIT Enter That concludes the procedure The weight is now displayed on the DM45 with the unit selected on the OHAUS balance g kg oz dw lb when the reading is stable Page 10 EuroDidact mail eurodidact com http www eurodidact com DM45 as special instrument Setup In the menu point RemoteDisplay the 7DM45 as special instrument is selected Then the dialogue box Setup of special instrument appears from this select the DM45 s function and measure range Function When Remote Disp 1 2 is selected the DM45 shows the function and measure range on the LED s DM45 then measures as when in normal Multimeter function The connected PC must then ask the DM45 for the measurement result convert this and send a package with the result back to the DM45 for display ing Data packs for the DM45 uses the same protocol and format as DM45 as slave display Protocol for DM45 as slave display Description of the protocol for communication between a PC and the EuroDidact Demo Multimeter DM45 when this is used as a slave display or special instrument Interface RS232 Baudrate 9600 Data bits 8 Stop bits 1 Parity NONE The following 2 formats for packages can be used Package with full control ove
4. cable from the PC and setup the Intrument type according to the instructions on the following pages Page 8 EuroDidact mail eurodidact com http www eurodidact com Configuration of the METTLER TOLEDO PB3001 s balance Mettler PB3001S must be setup as follows when used with the DM45 Connected unit Host Transmit function S Cont Transmit format S PM Baud rate 9600 Bits Parity 8b no Handshake HS oFF Now connect the cable supplied with the DM45 Multimeter between the DM45 DB 9 plug Mettler and the Mettler balance Configuration of the Sartorius LC4201 balance Sartorius LC4201 must be setup as follows when used with the DM45 Code Baud rate 9600 517 Parity Space gt 22 Number stop bits 1 stop bit 53 1 Handshake Software 5 4 1 Data output Auto print 6 1 4 or 6 1 5 Now connect the cable supplied with the DM45 Multimeter between the DM45 DB 9 plug Sarto rius and the Sartorius balance Configuration of the KERN 572 balance When connected to DM45 it is possible to use the PRINT Key AUTOPRINT or AUTOPRINT_PC but not the Enunerator function Kern 572 must be setup as follows when used with the DM45 Display Press key MODE MODE PRINTER YES MODE MODE MODE 9600 Bd YES MODE NUMERATOR NO MODE AUTOPRINT NO AUTOPRINT PC YES MODE Now connect the cable supplied with the DM45 Multimeter between the DM45 DB 9 plug Kern and
5. the Kern balance Select on the DM45 front panel the RemoteDisplay 1 or 2 and the weight is displayed with the unit selected on the Kern balance g kg oz dw Ib when the reading is stable Page 9 EuroDidact mail eurodidact com http www eurodidact com Configuration of the OHAUS Explorer balance The OHAUS Explorer must be set up as follows when used with the DM45 Multimeter RemoteDisplay Procedure for connection of the OHAUS Explorer balance to the DM45 1 Connect the EuroDidact RS232 cable between the balance and DM45 DB 9 plug Ohaus 2 Turn on the DM45 3 Select the OHAUS balance Remote Display 1 or 2 Note If OHAUs is not displayed on the DM45 use the PC program to setup the DM45 as de scribed on page 8 in this manual 4 Turn on the OHAUS balance 5 Setup the OHAUS balance this way Display Press key WEIGH Setup CAL gt seven times R5e3 Enter Enter BALUD Enter arrow up down until 5500 Enter PARITY NONE Enter arrow up down until NONE Enter DATA 8 Enter arrow up down until 8 Enter STOP 1 Enter arrow up down until Enter LOCK OFF Enter arrow up down until FF Enter EXIT Enter Display Press key WEIGH Setup CAL gt six times until PRINT Enter AUTOPRAT Enter arrow up down until N7ER Enter INTER Enter arrow up down until Enter STABLE Enter arrow up down until N7ER Enter NUMERIC Enter arrow up down until FF
6. C and read out on the DM45 s dis play as 1026mB EuroDidact instruments Functions as Remote Display for Pressure meter Rate meter pH meter and Energy meter The DM45 finds out on its own which EuroDidact instrument is connected METTLER TOLEDO PB3001 S Balance Connectto METTLER PB3001 S balance SARTORIUS LM4201 Balance Connect to Sartorius LC4201 balance KERN 572 Balance Connect to KERN 572 balance OHAUS Explorer Balance Connect to OHAUS Explorer balance M DEMO MULTIMETER Oj x File RemoteDispla Function select Function Graph n Configure RemoteDisplay Remote Disp 1 or Remote Disp 2 must not be x selected on DM45 during this configuration RemoteDisplay No 1 Select Instrument type Function une vac roc RemotiDM as Slave display DM as Special Instrument Display for another instrument METTLER TOLEDO PB3001 S Balance SARTORIUS LC4201 Balance KERN 572 Balance D 2 2 m Remote Display RS232 for other Remote Display Remote Display Note The DemoMultimeter with 4 DB 9 plugs at aa mue or ear ie eue the backside connects directly to the balance instru i a ment using the cable delivered with the DemoMultimeter 53 Configuration of RemoteDisplay Start the DM45 programme DM45 exe and select the Instrument type from the pull down menu You may now close down the PC program and disconnect the RS232
7. EuroDidact Demo Multimeter Remote Display Type DM45 User s Manual Version 2 22 English EuroDidact mail eurodidact com http www eurodidact com Contents Overview Overview Function Overview Frontside User Manual pH Meter pH measuring PC Program DM45 RemoteDisplay Setup for Mettler Sartorius and Kern Balance Setup for Ohaus Balance DM45 as Special Instrument 7 Segment Control Technical Data EuroDidact Demo Multimeter Remote Display is a microprocessor based multi instrument Specially designed for the education in Physics Chemistry and Biology The instrument has the following functions and measuring modes e Voltage measurement DC amp AC e Current measurement DC amp AC e Resistance measurement e Temperature measurement with standard NiCr Ni thermocouple type K 50 C to 1200 C e pH measurement with pH combination electrode e Remote Display Configuration for two different instrument inputs at the same time The result of the measurements is displayed on a large 57 mm 4 digit LED display The units of measure ment are shown with two character LED matrix display A display at the rear panel is simultaneously displaying the result for the teachers convenience The DM45 can be used as a stand alone instrument or with a PC The Windows program included with the instrument is for remote control installation setup and adjustment of the multimeter Also inclu
8. G Only connection of touch safe high voltages are allowed Com Common input bushing for V A or Q measurements WARNING This bushing is connected to chassis Only connection of touch safe voltages are allowed mA 40A Measurement range Thermocouple NiCr Ni C K pH probe adjust pH function Display REAR PANEL Power 230 V AC Fuse 0 5AT Fuse 4AT RS232 interface Display Input bushing for measurement of current Max 4A Input bushing for measurement of current in 40A range no fuse do not overload 6 LED s for indication of selected measurement range Compensation plug for connection of standard thermocouple type K NiCr Ni 2 LED s for indication of temperature unit BNC bushing for connection of pH combination electrode Knob for adjusting buffer sensitivity Nernst s equation and manual temperature compensation 6 LED s for indication of selected pH function 4 digit LED display 57 mm with sign and measurement units 230 V AC mains Mains fuse for instrument 0 5 AT Fuse for ammeter ranges from 4mA to 4A 4AT RS232 interface to PC and Remote Display input with supplied X plug 4 digit LED display with sign Same readout as front display Page 3 EuroDidact mail eurodidact com gt http www eurodidact com Instructions for use DM45 consists in principle of 4 instruments A standard multimeter with measuring ranges for voltage and current both with ac
9. ct pH T mien using Shift A amp wy 4 The internal temperature sensor of the instrument is used for compensation NiCr Ni thermocouple Select pH T picni using Shift A amp wy 4 Use the connected thermocouple to measure the temperature of the pH solution e Manual temperature First select adj T_ ua using Shift A amp wy 4 Use the knob adjust 15 to set the temperature 0 to 50 C and push w 4 to start measure with the function pH T sia 2 Page 6 EuroDidact mail eurodidact com http www eurodidact com PC program DM45 Installation Insert the CDROM in drive From Windows run the program lt D EuroDidact DM45 PC software SETUP EXE gt Click the Target button to select where you want to install the program e g C DM45 Start the installation with the Start button The program is then installed on your hard disk and the Group EuroDidact is added xi EuroDidact Setup x x uroDidact DEMO MULTIMETER TYPE DM45 Version 2 00 Copyright c 2001 EuroDidact Enter target directory TR arget Program Installation cabMa5 Processing File none J Ok X Cancel Close i x Ds G Setup Complete Select Ok to create Program Manager group Start the program DM45 in the group EuroDidact and select the ComPort from the File pull down menu used to connect to the Demo Multimeter When the Demo Multimete
10. ded with the instrument and s w is a cable for RS232C PC connection and an x adaptor plug 0 Modem for connection with other instruments i e an electronic balance when working as a Remote Display Page 2 EuroDidact mail eurodidact com http www eurodidact com gt gt OPERATION T a Ov EuroDidact __ Volt Amp Q _ Temperature __ Remote Disp 1 __ Remote Disp 2 POWER A DEMO MULTIMETER REMOTE DISPLAY TYPE DM45 FRONT PANEL 1 BI oat Su 9 10 11 12 13 14 15 16 17 POWER Function select Function indicators Shift amp amp w V A Q select V A Q indicator V Q e Vo 0 4 e C S adj buffer Ve o4 eK ym_ adj sens e Ax e 40 Ad PH Tambient A 400 PH Tyicr ni _ eQ e 4000 adj Tmanuai 40A PH Tmanval V mA kQ adjust Thermocouple VQ Com mA 40A NiCr Ni pH probe ev 0 000 mE gt ev 0 0 65 7 8 9 10 11 12 13 14 15 16 Mains switch Push button for function select 5 LED s for indication of selected function Push buttons for range select temperature unit or pH compensation method dependent of the selected function Push button for selection of the multimeter function 5 LED for indication of selected multimeter function Volt Amp Q Input bushing for voltage or resistance measurements WARNIN
11. r DM45 has been correct connected with the supplied cable the program automatically displays the current function set on the Multimeter See the example below oix Eile RemoteDisplay Function Graph Function select 0 000 ma nio inix voc vac anc AAC gt aee ee une sew Eat Range No Meas data WONTON de D NO e Example Recorded Data and Graphic presentation Double click on a point and the value is displayed DC Vottage mv SPRSRREPaERASL AA O D 1 ie 73 79 oo A 1 zy 8 L 5 D 3 8 9 oO 59 73 0 8 4 8 TEASE SAE eT ASCII OC RO ER aT EE NNE Page 7 EuroDidact mail eurodidact com http www eurodidact com Remote Display Using the software DM45 exe delivered with the instrument it is possible to configurate the DM45 asa Remote Display for different types of instruments Two configurations can be set at a time None The functions Remote Disp 1 and or 2 can not be selected DM45 as slave display It is possible to write to the display using two special commands DM45 as special instrument The DM45 functions as a Multimeter but readings are not displayed The readings are transferred to the PC for calculations and this result is then displayed on the DM45 As an example Connect a pressure transducer to the Multimeter for measuring the mV from this transducer The measurements are calculated in the P
12. r each segment in the display COM 220 Package format STX LEN COM _DO DI D5 D6 CHKS ETX 02 12 220 Sign 7 a Semen ae nt Li Semen Dot Check 03 Start 0 None Digit 3 Digit 2 Digit 1 Digit 0 Matrix 1 Matrix 2 sum Stop 1 Sign Package to send a decimal number to the display COM 221 Package format STX LEN COM _Do Di b2 D3 D4 ps D6 CHKS ETX 02 One float in C Check 03 Start Or i ix rix sum Stop one single in Pascal Delphi Page 11 EuroDidact mail eurodidact com gt http www eurodidact com Writing to 7 segment At COM 220 Each of the 8 bits in D1 D4 represents one segment in the display This method gives full control over all 4 x 8 segments Ef p C oH Display HG F E D C B A shows b7 b6 b5 b4 b3 b2 b1 bO Hex Dec 0 0 0 1 1 1 1 1 1 3F 63 1 0 0 0 0 0 1 1 0 06 6 1 1 0 0 0 0 1 1 0 86 134 2 0 1 0 1 1 0 1 1 5B 91 A 0 1 1 1 0 1 1 1 77 119 Etc Example If a display of 11 2A is wanted Send DI 6 D2 134 D3 91 amp D4 119 Writing to DotMatrix At both COM 220 amp 221 Write to the two DotMatrix displays using the following code Blank 0 A to 1 to 29 ato 31to59 Q 61 R 62 gt 63 u 64 M 65 66 EuroDidact Page 12 mail eurodidact com http www eu
13. rodidact com Technical Information Mains 230 VAC4 t 10 50 Hz 45 VA WARNING Com bushing is connected to chassis Only connection of touch safe voltages are allowed Display Front Rear Voltage DC Range Precision Voltage AC Range Precision Current DC AC Range Precision Resistance Range Precision Temperature meter Input Meas unit Range Resolution Precision pH meter Input Range Adjustments Temperature compensation Resolution Precision RS232 Interface 57 mm large 4 digit LED display Meas units displayed with 2 characters 21 mm large 4 digit LED display 400mV 4V 40V 400V 4000V 1 1 on least significant digit 4V 40V 400V 4000V 1 1 on least significant digit 4mA 40mA 400mA 4A 40A Duration max 2 minutes 20A Continuously 1 2 on least significant digit 400 ohm 4kohm 40kohm 400 kohm 4Mohm 1 1 on least significant digit Standard thermocouple NiCr Ni type K Degrees Celsius C or Kelvin K 40 C to 1200 C lt 1000 C 0 1 C gt 1000 C 1 C 1 1 on least significant digit pH combination electrode Oto 14pH Zero point value Buffer adjust Sensitivity electrode relative sensitivity to Nernst Equation Three methods 1 Automatic via the built in sensor 2 Automatic via NiCr Ni thermocouple 3 Manual adjustable from 0 to 50 C 0 01 pH
14. s for accurate measurements in the full pH measurement range 2 buffer adjusting e The adj buffer 16 LED is lit and the pH probe is placed in a pH 7 00 buffer solution When the reading on the display has settled adjust with the knob adjust 15 the display reading to 7 00 e Push the vw 4 to save the adjustment in the instrument and the adj sens 16 LED is now flashing and display is Ne Now rinse the pH probe and place in a pH 4 00 buffer solution e Push simultaneously the w 4 and the 4 When the reading on the display has settled adjust with the knob adjust 15 the display reading to 4 00 e Push the ww 4 to memorize the calculated sensitivity in the instrument and the adj sens 16 LED is now lit Now rinse the pH probe Please observe that each time the pH meter function on the DM45 is selected at least a 1 buffer adjusting must be performed The Relative sensitivity of the electrode is memorized but the Zero point value is not It is not possible to Shift 4 back to calibration without leaving the pH meter function Tip The Zero point value is displayed if you short circuit the BNC input after a calibration has been performed Page 5 EuroDidact mail eurodidact com gt http www eurodidact com pH measurement The instrument is now ready for measuring with one of the three temperature compensation methods available e Ambient temperature Sele
15. voltages are allowed Temperature meter Push the Function select 2 to select the function Temperature Connect a Thermocouple NiCr Ni type K to the green standard input Thermocouple NiCr Ni 12 Use Shift amp w 4 to select the reading in Deg Celsius C or Kelvin K Page 4 EuroDidact mail eurodidact com gt http www eurodidact com pH meter Push the Function select 2 to select the function pH and connect a pH probe to the pH probe 14 input pH probe calibration The following two parameters are used e Zero point value The pH value of the probe giving an output of 0 mV ideal value pH 7 00 e Relative sensitivity The sensitivity of the pH probe relative to the Nernst Equation Calibration procedure The instrument supports two methods of calibrating of the pH probe The 1 buffer method is the simple and easiest to do and sufficient for measurements in solutions in the range pH 6 to pH 8 1 buffer adjusting e The adj buffer 16 LED is lit and the pH probe is placed in a pH 7 00 buffer solution When the reading on the display has settled adjust with the knob adjust 15 the display reading to 7 00 e Push the vw 4 to save the adjustment in the instrument and the adj sens 16 LED is now flashing and display is ne Now rinse the pH probe and push the ww 4 to abort the sensitivity adjusting and using the last memorized sensitivity The 2 buffer method i
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