5020-0408_englisch 128KB Mar 28 2012 06:04:19 AM
Contents
1. 35 Manual Operation 10 Operating the thermometer with external multiplexers In case two measuring channels are not sufficient external multiplexers may be used Such multiplexers can be fitted with 8 or 16 channels The maximum number of external multiplexers mustn t be more than five Apart from that the log numbers of the various multiplexers have to be identical The number of external measuring channels is limited by the model version In the basic model up to 21 sensor parameter sets can be stored at the same time As a parameter set has to be available for each measuring channel if the sensors calibration coefficients deviate from each other the maximum number of external measuring channels is set to 20 With an expanded version up to 80 external measuring channels can be connected The external multiplexers have to be connected to channel B of the thermometer In the display of measuring values and for the settings of the instrument channel B is replaced by the external measuring channels Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument The instrument recognizes the connected external multiplexers and the full number of measuring channels automatically after a cold start OM AO Le Le Oe Le MuxOut 9 12 13 14 15 16 SENSOR MULTIPLEXER ATM 4016 9 9909999 MuxIn 1 Picture 10 1 Frontal view o2. Max 962 Min 200 Dec 3 Picture 9 1 Example of a channel description set 29 SmartGraph At the beginning of each channel description set there is the number of the description set The thermometer tells SmartGraph the number of the description set belonging to a measured value The description sets 200 up to 2099 are used if the unit ohm is activated For C K and F the description sets 2100 to 2199 2200 to 2299 and 2300 to 2399 are used In case the differential measurement is activated on the instrument the description set numbers 2400 up to 2799 are used accordingly If for example the unit C is set on the thermometer and the differential measuring is deactivated the description set with the number 2101 is used for the measured values of measuring channel B For measured values of the measuring channel MOS the description set with the number 2106 would be used In the second line of the description set the measured value is described In the example shown in picture 9 1 temperature A was chosen for this line TA is the short name which has been set for this measuring value For unit the unit C was entered The temperatures 962 C and 200 C have been set as maximum and minimum The resolution was set to 3 decimal places In the file Sensors ini the rest of the entries were created by the manufacturer according to the above mentioned example Using a text editor the user can change the file Sensors ini If for
3. PC send a different code number the instrument will answer with NAK In the regular case it will answer with ACK Instruction code r Switching the instrument s keys on off To switch off the instrument s keys the PC sends the instruction code r followed by 01h To switch it back on the PC sends r followed by 00h The thermometer will answer with ACK in both cases NOTE In case the instrument should be controlled by means of a PC only it is recommended that the thermometer s keyboard is switched off at first so that no configurations may be changed afterwards Instruction code s Switching the FAST mode on off To switch on the FAST mode the PC sends the instruction code s followed by 01h To switch the FAST mode off the PC sends s followed by 00h In both cases the thermometer will answer with ACK Instruction code t Switching the ZERO mode on off To switch on the ZERO mode the PC sends the instruction code t followed by Olh To switch the ZERO mode off the PC sends t followed by 00h In both cases the thermometer will answer with ACK Instruction code u Setting the unit To select the unit the PC sends the instruction code u followed by the unit and the matching code see instruction code h The thermometer will answer with ACK after every change 19 Operation from PC Instruction code v Switching the differential measurement on off To switch on the diffe
4. activated with the ENTER key By pressing ESC you will return to the main menu without activating a new unit 6 3 2 Turning differential measuring on off Through a configuration of the second line of the display the differential measuring is switched on or off The thermometer is able to display the difference of the measured values of channels A and B A B To do this you have to select the element 2 line configuration from the main menu by using the keys or gt Pnd line config 2nd line B Picture 6 6 Main menu element 2 line configuration Subsequently this selection can be activated with ENTER so that you will get the following display Pnd line B f U ESC ENTER Picture 6 7 Display after activation of the main menu element 2 line configuration Using the arrows fl and U it is possible to choose between the display of the measuring value of channel B and the difference A B in the second line This function can be activated with ENTER By pressing the ESC key you will return to the main menu without making any changes 11 Manual operation 6 3 3 Switching channels on off You have got the possibility of switching measuring channels on or off To do this you have to select Channels on off from the main menu by means of the keys or gt channels on of lt ESC ENTER Picture 6 8 Main menu selection Channels on off Afterwards this selection can b
5. configurations are loaded In doing so the unit is set back to C channels A and B are switched on the differential measurement A B is deactivated as are the FAST mode and the ZERO mode 6 3 6 Starting a record of measuring values The instrument offers the possibility of storing measured values in a battery powered memory see Specifications for size of memory By starting up a record the value memory is set back and measurements are started anew As it is possible to store measured values the measurements can be stored without a permanent connection of the instrument to your PC and may be transmitted to a PC at a later time if necessary To do this the main menu element start new storage has to be selected using the keys lt or gt start new storg lt gt ESC ENTER Picture 6 17 Main menu element Start storage of measuring values If you activate the element afterwards with the ENTER key the following will be displayed start new storg sure ESC ENTER Picture 6 18 Display after activation of Start storage of measuring values You can go back to the previous level of the main menu by pressing ESC Pressing the ENTER key starts up a new series of measurements If the thermometer is switched off no new measured values are stored after switching it back on Thus it is ensured that after recording a series of measurements and switching the thermometer off no further values are added to the seri
6. contains further data On the one hand it contains the name of the file Firstly this can be transmitted to the thermometer along with the parameter set so that the user can easily find the file in which one of the instrument s 22 Sensor specific Parameters parameter sets is defined Furthermore the parameter file contains some short information 16 bytes which has to be entered by the user This is also transmitted to the thermometer along with the parameter set In the instrument it enables the user to assign a parameter set easily to a measuring channel Besides there are five lines of information contained in the parameter file which can be entered by the user as he wants Afterwards the parameter file contains various calibration coefficients which have been entered by the user while establishing the parameter set These are the basis of the actual calibration coefficients By means of checksums the parameter files are protected against unwanted changes NOTE To keep it clear the user should proceed in the following way The name of the parameter file consists of a maximum of eight characters Here one can use the name or the number of the sensor for example The 16 character description which is also displayed on the thermometer can be entered by the user He ought to use a description of the sensor which allows an especially easy assignment of the parameter set to the sensor Thus it is achieved that the user easily recognized t
7. definition of an industrial temperature sensor a Establishing a parameter set with the constants specified in EN 60751 b Entering the coefficients according to Callendar van Dusen The coefficients used in the c EN 60751 are a special case of the Callendar van Dusen coefficients In this point of the menu the user can determine the coefficients himself For example if you have a sensor corresponding to EN 60751 with only its resistance value of 0 C deviating from the value prescribed in the norm the menu point b would have to be selected and the correct resistance value for 0 C would have to be entered During the input the coefficients according to the norm are automatically used if the user does not enter a different value The input of couples of values according to Callendar van Dusen enables the user just to enter the values of the temperature sensor s calibration sheet The program calculates the appropriate Callendar van Dusen coefficients and saves them in a new parameter file For this procedure the user firstly has to decide whether a parameter set is to be established for positive temperatures 0 C only or for both positive and negative temperatures Positive temperatures only If the parameter set is to be determined for positive temperatures only just the coefficients R A and B have to be calculated To do this two to twenty observational pairs can be entered If only two observational pairs are entered only the
8. out with a reduced resolution and accuracy By pressing the FAST button again this faster mode is stopped 6 2 Measuring temperature changes If you press the ZERO button the value measured last is temporarily stored During the following measurements the content of the temporary memory is subtracted from the current measured value This function is intended for applications used to describe changes in the values measured Pressing the ZERO button again stops this mode 6 3 The user menu Further functions are available to the user by means of a user menu This menu is started when pressing the ENTER button Using the buttons or gt the user may choose an element from the main menu which are explained in the following Afterwards the chosen menu element can be selected by pressing ENTER By pressing ESC one returns from the main menu back to the measuring mode 6 3 1 Selection of units Firstly the element Unit selection in the main menu has to be clicked into with the buttons eo or TT oC Picture 6 4 Main menu element Unit selection 10 Manual Operation After that this function can be activated with the ENTER key Then the following will be displayed for example f J ESC ENTER Picture 6 5 Display after activation of main menu element Unit selection The instrument supports the units C K F and ohm Using the arrows fl or U the appropriate unit can be selected and can then be
9. read this manual before using the instrument for the first time 2 Avoid any inappropriate usage of the instrument 3 All the regulations warnings and information in this manual have to be complied with 4 If there are any additional safety regulations those also have to be stuck to 5 The user is not allowed to open the instrument as this is not necessary for an appropriate usage Maintenance must be carried out by qualified personnel only 6 The user has to ensure that none of the sensor or data wires are in contact with voltage carrying parts 7 The user has to ensure that no operating conditions occur which could lead to endangering or damage of property or personal injury 8 Measuring results do not only depend on the correct function of the instrument but also on other circumstances e g fixing of the sensors That is why the measuring results have to be checked critically e g plausibility check before decisions are made on the basis of measuring values 9 The user s manual has to be at the operator s disposal at any time 10 No alterations to the instrument may be made 11 Never use a damaged instrument Introduction 2 Introduction The T 4200 is intended for temperature measurements by means of platinumresistance thermometers with a nominal resistance of 100 ohms Pt 100 For this purpose the temperature related resistance value of the sensor is initially measured After that the temperature value is calcul
10. the ITS 90 reference functions are fixed which describe the performance of ideal platinum temperature sensors To fit real sensors to these reference functions deviation functions are set in the ITS 90 This program allows the input or calculation of the coefficients of those deviation functions Whereas there are only two functions for positive or negative temperatures for industrial sensors 11 areas all in all are distinguished for the laboratory sensors This is the reason why the user first has to choose one or more temperature ranges set for the ITS 90 As it might lead to contradictions if more than one temperature range is chosen the program only allows to combine temperature ranges which do not overlap After the choice of temperature ranges the following submenu appears Here the user may select one of the three methods to establish a new parameter set Use standard ITS90 coeffizients Enter ITS90 coeffizients Enter temperatur resistance couples Abort Picture 8 4 Submenu for the definition of a laboratory temperature sensor In any case the value of the sensor resistance for the reference temperature of 0 01 C has to be entered a Establishing a parameter set for a sensor ideal in the sense of ITS 90 b Input of coefficients of the deviation function s Each of the above selected temperature ranges needs its own deviation function As the different deviation functions use different coefficients the coefficient for eac
11. the external multiplexers To read the version log number of the external multiplexers the PC sends the instruction code E4h If no multiplexer is connected the thermometer will just answer NAK Otherwise the instrument will answer with ACK read the log version number of the multiplexers and send them to the PC Instruction code Flh Reading whether the storage of measuring values is switched on or off 20 Operating from PC To read whether the storage of measuring values is switched on or off the PC sends the instruction code F1h The thermometer will send 00h if the storage is switched off and Olh if the values are saved Instruction code F2h Reading the status of the keyboard To read the status of the keyboard the PC sends the instruction code F2h If the keyboard is not blocked the thermometer will send 00h if it is blocked it will send Olh Instruction code F3h Reading the status of the FAST mode To read the status of the FAST mode the PC sends the instruction code F3h The thermometer will send Olh if the FAST mode is activated otherwise it will send OOh Instruction code F4h Reading the status of the ZERO mode To read the status of the ZERO mode the PC sends the instruction code F4h The thermometer will send Olh if the ZERO mode is activated otherwise it will send 00h Instruction code F5h Reading the unit To read the unit set in the thermometer the PC sends the instruction code F
12. the options of your printer With most printers you can choose between various graphics resolutions A higher resolution does increase the quality but in the other hand the time needed for the printout rises The best thing is to try different resolutions Tip To print single graphics windows it is best to use the page orientation landscape to print all graphics at once or the table it is better to use the orientation portrait 9 4 2 Edit menu With the instruction Kopieren copy graphics can be copied to the clipboard Either click on the appropriate graphics window with the left mouse button or select it from the menu Fenster window so that it becomes the active window Then choose the instruction Kopieren copy from the menu Bearbeiten edit Now you can change your application program In the new application select the instruction Einf gen paste from the menu Bearbeiten edit Using the instruction Vergr ern enlarge the centre of the current graphics window is enlarged to the next level The same function is activated by the left mouse button while the pointer is over the image of a graphics window pointer magnifying glass here the centre of the enlargement can be determined by the position of the magnifying glass Using the instruction Verkleinern reduce the graphics window is reduced to the next level This function is identical with a double click of the right mouse butt
13. year lt 1 mK C LCD LED backlighted 2 lines 4 16 characters height of characters 9 mm C F K ohm RS 232 galvanically separated from the measuring instrument 1200 2400 4800 or 9600 baud menu orientated alternatively controllable by your PC 9000 optionally 45000 measuring values buffered by battery Lithium battery CR 2032 115 or 230 V tolerance 10 6 50 or 60 Hz about 15 VA 230 V mains 200 mA slow acting 115 V mains 400 mA slow acting 260 x 80 x 240 width x height x depth in mm about 2 5 kg Available accessories and possible extensions external multiplexers temperature sensors memory expansion for up to 80 external measuring channels and 45000 measuring values SmartGraph software measuring data acquisition and processing First operation 3 1 Range of goods delivered 1 T 4200 Power supply cable Cable for interface 2 3 4 Two covers for the two Sub D plugs at the back of the instrument 5 Cover for one of the sensor connections 6 Software to establish and process sensor specific calibration coefficients 7 User s manual 4 First operation of the T 4200 Please do read the safety regulations at the beginning of the user s manual Afterwards you should check the delivery for completeness Check the instrument for external damage In case there are noticeable damages you mustn t use the instrument In this case you should contact your dealer Please check whethe
14. 12 Errors The texts Sensordata Error and Deleting followed by a number appears on the display An error has occurred in the parameter set with the number displayed The parameter set has been deleted If you still need the parameter set you have to transmit it again from your PC to the thermometer see chapter Establishing sensor specific parameter sets Check whether the assignment of parameter sets to measuring channels is correct and change them if necessary see chapter Manual operation The text Invalid Params appears on the display A measuring channel has been assigned a number of a parameter set which doesn t exist Correct the mistake see chapter Manual operation The text open appears on the display The value of the connected resistance is above the resistance area which can be realized by the thermometer or the connection line is open Check whether the temperature sensor is connected correctly The text short appears on the display The value of the connected resistance is below the resistance area which can be realized by the thermometer or the connection line is shorted Check whether the temperature sensor is connected correctly The text to great appears on the display In case the set unit is ohm The resistance value is higher than the maximum Check whether the correct type of sensor has been used In case the set unit is C K or F The measured temperature value is higher than the max
15. 5h The instrument will send the code of the unit see instruction code h Instruction code F6h Reading the status of the differential measuring To read the status of the differential measuring the PC sends the instruction code F6h The thermometer will send Olh if the differential measuring is activated otherwise it will send OOh Instruction code F7h Reading the status of a measuring channel To read the status of a measuring channel the PC sends the instruction code F7h followed by the channel number The thermometer will answer Olh if the channel is switched on otherwise it will send 00h Instruction code F8h Reading the number of an assigned parameter set To read the number of a parameter set assigned to a measuring channel the PC sends the instruction code F8h followed by the number of the measuring channel The thermometer will send the number of the parameter set 21 Sensor specific parameters 8 Establishing sensor specific parameters After the instrument has measured the sensor resistance it needs the calibration coefficients of the sensor used to calculate a temperature value from the resistance value These parameter sets can be established on the PC using the program SEN4200 and can be transmitted to the measuring instrument Additionally this program offers the processing of an almost unlimited number of various temperature sensor calibration coefficients 8 1 Installation of the PC program to estab
16. After clicking into the menu element to read a parameter file the user first has to enter the file s name Afterwards the content of this file is displayed on screen 8 2 5 Viewing the parameter sets available on the instrument To view the parameter sets available on the instrument the program reads the list of those parameter sets After that this list is shown on screen analogously to picture 8 5 8 2 6 Deleting a parameter set from the thermometer To delete one of the parameter sets available on the thermometer the program starts by reading the list of sets available and displays it on screen afterwards analogously to picture 8 5 Afterwards the user has the possibility to delete one of the parameter sets 9 Recording and _ presentation of measured values with SmartGraph The program SmartGraph offers the recording storage and graphical presentation of measured values SmartGraph is a trademark of the Weiland Meierhofer GmbH 9 1 System requirements for the installation of SmartGraph Hardware You must own a personal computer with an 80386 microprocessor or better recommended are at least 4 MB RAM and a mouse To connect the thermometer a serial interface has to be available Software MS Windows 95 or MS Windows 3 11 has to be installed on your computer 28 SmartGraph 9 2 Installation of SmartGraph Start up Windows Insert the SmartGraph floppy disk into your disk drive Select the instruction Ausf hren Run from
17. O mode and the storage of measured valued are also switched off After switching the instrument on it is in a standard state set by the manufacturer Here channels A and B are activated The measured values are displayed in C Unless arranged differently with the supplier for both temperature sensors the standard coefficients are set according to EN 60751 Initially when switched on the display shows the type of instrument T 4200 v 1 03 Picture 6 1 Example of the first display after switching on the thermometer and its version After a short time the second line changes and the instrument s number is displayed T 4200 00497010017800 Picture 6 2 Example of the display of the instrument s number After the first measurement one of the following displays might appear for example L Manual operation A 123 456 C A 123 456 C B 78 901 C Picture 6 3 Examples of the display of measured values In the following it is explained how the user might adjust the settings of the instrument 6 1 Measurements with reduced measuring times By pressing the button FAST a measuring mode can be activated in which the measuring times are a lot shorter This mode is intended especially for tasks when temperature values tend to change quickly Using an external multiplexer it still offers a high measuring rate for each channel even with a higher number of measuring channels In this faster mode the measurements are carried
18. User s manual for the Precision thermometer T 4200 version no 2 00 or better Copyright 2000 Dostmann electronic 26 05 2001 Table of contents 1 Important Safety Regulations 00 0 ee eese iet seni eeki aE Teetske aake ao Tane 1 Ds MNtrOMUCHION 3 ent eint EEE E E tates ches E ER did ete ian eee 2 3 Specifications ss 3 So i ai ra E asta nba aoe ceded Aea 3 3 1 Range of goods delivered raeson ninn nia E a a a ana 4 4 First operation of the T4200 sesine ennnen iii eriein an aie a a e 4 5 Description of tHeinstrment oeiee eeren iea ien aee Eea EE EEEa EE E Eoee ine Taaah 5 5 1 Assignment Of plugs nenn a i a a airi arraia 7 6 Manual Operations niies airnn T a E easy ae ea baste eae ates 7 6 1 Measurements with reduced measuring times eeeeeseseessereeresressrssresresressessessrerreeresees 10 6 2 Measuring temperature Changes e eeeeeeseseesrererressssrtsresressessessesstestestessessresresressessese 10 SPE RTEA a CEA o A A E E EA 10 6 3 1 SelECtHON OF UNIS ri araneo r eA EEE AA AE E E EE 10 6 3 2 Turning differential measuring op off eeeeseesessesesresresssssresresresressessrssresresressese 11 6 3 3 Switching channels on off roires erene Ee Oe EKETE 12 6 3 4 Selection of sensor parameters eessseessesesstseessrssresresressessesstssrerresressessrerresesese 13 6 3 5 Loading the standard settings 0 ccccceccccssccesseceeseeceneecesaeceesecceaeeeseceseaeecntaeeetaees 14 6 3 6 Starting a re
19. V For the serial transfer the following parameters are set 8 data bits no parity bit one stop bit 16 Operating from PC Note If you do not need a connection between the thermometer and your PC you ought to remove the RS 232 cable because the PC might influence your measurements In the following the instructions necessary to control the thermometer by means of a PC are explained Here the abbreviation ACK is used for an okay message 06h and NAK for an error message 15h Instruction code a Checking whether the instrument is ready to use To check whether the instrument is ready to use the PC sends the instruction code a The instrument will answer with ACK if ready Instruction code b Reading the instrument s number To read the instrument s number the PC sends the instruction code b The instrument will answer with the text 16 characters which also appears in the second line of the thermometer s display after switching it on Instruction code c Recognizing the software version To read the number of the software version the PC sends the instruction code c The measuring instrument will answer with a text of 6 characters which appears in the second line of the display right after switching the thermometer on Instruction code d Recognizing the number of measuring channels To count the number of measuring channels the PC sends the instruction code d The instrument will answer with the fu
20. ated using sensor specific calibrating data Normally temperature sensors are analysed using measuring methods based on ACs or DCs The AC method in particular offers the advantage of a far reaching insensitiveness to irritating thermoelectric voltages On the other hand measuring errors might occur using this method because of parasitical capacities and inductances The DC method however has the advantage of being quite insensitive to parasitical capacities and inductances and thus offers the possibility to exchange sensors relatively unproblematically This method however could lead to incorrect measuring values because of irritating thermoelectric voltages In the T 4200 switched direct currents are used to measure the sensor resistance By comparing the results to a reference resistance which is integrated in the instrument a precise measurement of the sensor resistance is guaranteed Thus the T 4200 unites the advantages of the methods based on ACs with the advantages of those based on DCs At the same time the respective disadvantages are avoided The conversion of the measured value of resistance into a temperature value is done with the help of sensor specific calibration tables in the instrument These calibration coefficients do not have to be entered again into the measuring instrument after every exchange of sensors As it is possible to store the calibration coefficients for several sensors in many cases it will be sufficient to assig
21. can be used for more than one measuring channel at the same time In addition to that the input of sensor parameters and the processing of calibration coefficients of various sensors has been transferred to a PC see chapter Establishing sensor specific parameters The user has the possibility to enter the sensors calibration coefficients on his Manual Operation PC and to save them there as well The PC software included in the package offers the processing of sensor coefficients and the input of short descriptions Those descriptions are transmitted into the measuring instrument along with the calibration coefficients Thus the user is enabled to assign the fitting parameters easily to a sensor as he can recognize the appropriate parameters with the help of those short descriptions and not by anonymous numbers only Whenever temperature sensors are exchanged the user can easily enter the sensor coefficients required for the thermometer from his PC and does not have to enter them again using the instrument s keyboard On top of that the thermometer is able to store the calibration coefficients of various sensors so that it is not necessary to transmitt sensor data again if a sensor is changed Furthermore an easy to learn system which is menu controlled has been installed which offers a lot of easily accessible functions for the user Most of the adjustments made by the user are preserved when the instrument is switched off Only the ZER
22. coefficients Ro and A are calculated In that case the coefficient B values 0 For three or more observational pairs all three of the coefficients are determined If more than three observational pairs are entered the coefficients are calculated in a way that the resulting function shows a deviation as small as possible for all observational pairs The calculation in this case is carried out using a least square algorithm Positive and negative temperatures If the parameter set is to be established for both positive and negative temperatures all of the four coefficients Ro A B and C have to be calculated To do this three observational pairs for positive temperatures 0 C have to be entered first After that one observational pair of a negative temperature lt 0 C has to be entered 25 Sensor specific parameters After all the sensor coefficients have been entered or calculated the program asks for the temperature minimum and maximum the parameter set has to be valid for When used the instrument will show an error message if the set temperature range is exceeded in either way Finally the user is asked whether the established parameter set should be transmitted to the thermometer If it shouldn t be transmitted it is only stored in the subdirectory SENSDATA Transmitting the parameter set to the thermometer is described in chapter 8 2 2 8 2 1 2 Establishing a parameter set for laboratory temperature sensors In connection with
23. cord of measuring values eesesesessereeresressrssresresresressessessrerresressese 15 6 3 1 Setting the band taten onmino ition te iad S N a 16 7 Operating the instrument from your PC sssesssesssesesesssseseresrsesrresseesreessressressressseesseesseesse 16 8 Establishing sensor specific parameters seeseesseeeerseseessesiestssssresreeresressesstesresreesessesseesee 22 8 1 Installation of the PC program to establish sensor specific parameterS seeee 22 8 2 Operation of the PC program to establish sensor specific parameterS eeeeeees 22 8 2 1 Establishing a new parameter Set ccccccccesseeeseceeeseccesaeeeeeccsaeeeeeeceeeeesaeeneaees 24 8 2 1 1 Establishing a parameter set for industrial temperature sensors 08 24 8 2 1 2 Establishing a parameter set for laboratory temperature sensors 0 26 8 2 2 Transmitting a parameter set to the T 4200 0 ee eeseesseesseeeeeeeeeeeeeeeeeeeeeeeeaeeeaeeres 27 8 2 3 Listing the parameter files available on the hard disk cece eeeeeeeeeeeeeeeeeeneeees 28 8 2 4 Viewing a parameter file available on the hard disk estes eeeeeeeceneceeeeeeeeeeneeees 28 8 2 5 Viewing the parameter sets available on the instrument cece eeeceeeeeeeeeeeeeees 28 8 2 6 Deleting a parameter set from the thermometer ccccccecccesseeesteeeeseeeenneeeeaees 28 9 Recording and presentation of measured values with SmartGraph se eeeee
24. e activated with ENTER so that the following display will channels on of tU manual show Picture 6 9 Display after activation of the main menu element Channels on off Using the arrows and U the user first has to decide whether he wants to switch each channel on or off manually or whether all the wired channels should automatically be switched on and the unwired ones switched off by the instrument If the automatic mode is selected the following display will appear channels on of setting channels Picture 6 10 Display automatic mode Channels on off If the manual mode is chosen the following will be displayed A on f J ESC ENTER Picture 6 11 Display manual mode Channels on off It is now possible to chose between on and off using the arrows fl and ne By pressing ESC the old setting will be preserved By pressing ENTER the selected function will be 12 Manual Operation activated This main menu element is left only when all the channels have been switched on or off manually You ought to switch on only those channels which are actually connected to a sensor Otherwise the measuring time will be increased unnecessarily 6 3 4 Selection of sensor parameters The selection of sensor parameters is of particular importance Here the user has to determine which calibration coefficients are to be used for the sensor connected to each channel In addition to the number of the set of calibra
25. e following the operating elements are explained 1 2 3 10 974 6 5 8 11 l O A FAST N O A O O O en T 4200 S gr PRECISION THERMOMETER O re O N E D O Picture 5 1 Frontal view of the instrument 1 Measuring channel A to plug in a temperature sensor 2 Measuring channel B to plug in a temperature sensor or an external multiplexer Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument 3 LCD with LED backlight 4 The button FAST offers faster measurements with a reduced resolution see chapter Specifications Pressing the button FAST once switches over to the faster mode If Description of instrument you press the button again it switches back to the normal measuring mode In the fast mode the appropriate LED is switched on In the normal mode it is switched off 5 If you press the button ZERO the current measuring values are subtracted in any of the following measurements This function for example is equivalent to the tare function of scales Pressing the button again stops this function In the ZERO mode the appropriate LCD LED is switched on In the normal mode it is switched off 6 The button arrow up is used for the menu control only 7 The button arrow left lt is used for the menu control only 8 The but
26. eeeeeeeeeeeeeee 28 9 1 System requirements for the installation of SmartGraph eee eeseeeeeceteceeeeeeeeeeees 28 9 2 Installation of SmartGraph oo eee eeeeeeceececeeeceneceseecscecsaecsaceesceesaeesaeeseeeseeesaeesseesues 29 Table of contents 9 3 Introduction into SmartGraph cceeccceeeseeceneeeeseceeseecenaeceeaeceeeeccnaecsecaeceeaeecsaeesteees 9 3 1 Recording measuring Values eee eesceeeceseeesseceseeseeeceeecseecsaceeaeeescecaeesseeeeeeeaees 9 3 2 Graphical and tabular presentation of the measuring values 9 3 3 Analyzing and processing of measuring values 0 0 eeeeeeeeseeeeeceeeeceseeeeneeeeeeeeeees 9 3 4 DOCUMENTATION ie einen n webs llnchde butt COE Beavedeeeveuesetel Goueweidaldecaneteatsv odes 9 4 Description of the Menu INStrUCTIONS eee eecccceeseeeeseeeeeseceesneeeeeccnsneeeeaeceesaeecstneeetaees 9 4 1 File Mem ienen sorrinte ritorno nese nerro NEEN EE EE EVENES E EEEE EE Eae 9 42 Edit Menu sste ie r oe Tea a T e te Pee tree e T a 943 WAndOW MENU PETE AEE E EE 9 4 4 Options menu 9 4 5 Help menu 9 5 Storing the measuring data on the hard disk esceeceesseesseesseeesceeseeeeseeeseceeceeeeaeeeaees 10 Operating the thermometer with external multiplexers cee eeeeesseeeseeeeeeeeeeeeseeeeeeees 11 Errors and their correction 12 Guarantee and repairs Important Safety Regulations 1 Important Safety Regulations 1 Please do
27. er is presented To keep it clear only the first four elements of the table were filled in The maximum number of parameter sets available in the instrument depends on its model version In the basic model a maximum of 21 parameter sets is intended In an expanded version up to 81 parameter sets can be entered The left column shows the numbers under which the parameter set is listed The middle column contains the name under which the matching parameter file is saved on the hard disk In the right hand column one can find the short information In this example numbers 2 and 3 are empty The user now can decide where to fill in the parameter set which is going to be transferred to the thermometer If he chooses a place already occupied by another parameter set this 27 Sensor specific parameters parameter set will be recorded over When using the thermometer later on the operator can use the number set in this table to assign the respective parameter set to a measuring channel After the user has picked a number in the table the parameter set is transmitted to the thermometer 8 2 3 Listing the parameter files available on the hard disk By selecting the menu element to read all the parameter files available on the hard disk the user gets a list of all the parameter files contained in the subdirectory SENSDATA Here only the file names and the short descriptions are displayed 8 2 4 Viewing a parameter file available on the hard disk
28. es right after switching the instrument back on e g before the values have been transferred to the PC 15 Manual operation 6 3 7 Setting the baud rate At first the element Select baud rate has to be chosen in the main menu using the keys or as select baud rate 2400 Bd Picture 6 19 Main menu element Select baud rate After that this element can be activated with the ENTER key so that the following display will appear 2400 Bd f J ESC ENTER Picture 6 20 Display after activation of Select baud rate The thermometer supports the baud rates 1200 2400 4800 and 9600Bd Using the arrows fl or U the appropriate baud rate can be selected and then activated with the ENTER key By pressing ESC it is possible to return to the main menu without activating a new baud rate 7 Operating the instrument from your PC The instrument offers the possibility that nearly all of its functions can be controlled by a PC via a serial interface To do this the RS 232 interface see picture 5 2 of the instrument has to be linked with the matching PC connection Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument To ensure the current supply of the galvanically separated instruments of the thermometer s interface the PC s DTR connection has to be set to false 12 V and the RTS to true 12
29. example the temperature of an oven is measured on the measuring channel A the user could change the description set 2100 as is shown in picture 9 2 Sensor2100 Hold Oven temperature Name TOven Unit C Max 160 Min 150 Dec 3 Picture 9 2 Example of a channel description set changed by the user In the example shown in picture 9 2 the user has used application specific descriptions Apart from that it was fixed that a the measured values are high lighted if the temperature falls below 150 C or exceeds 160 C 30 SmartGraph The recorder window is opened with the instruction Start Recorder from the menu Datei File Recording intervals from 1 second up to 60 minutes can be selected Pressing the key Start a record is started The recorder window displays the most recently recorded measuring values of all channels In addition to that the graphics and table windows are up dated If the thermometer has not yet measured any new values when SmartGraph makes an inquiry no values are entered into the table at this time of record Thus it is ensured that the time pattern determined by the recording intervals isn t broken If the measuring instrument recognizes that the borders set in the technical specifications of the thermometer or the borders set by the user during the definition of the sensor s calibration coefficients are exceeded this is reported to SmartGraph SmartGraph will then ignore the appropriate measuring va
30. f an external multiplexer The connection MuxIn is intended for the connection of further external multiplexers The connection MuxOut serves as a link between the multiplexer and channel B of the thermometer or the MuxIn connection of another multiplexer nearer to the thermometer 36 External Multiplexer MuxOut Muxln Picture 10 2 Back of an external multiplexer For the connection of an external multiplexer with the thermometer two connection cables are required Apart from the above described connection of the measuring channels a connection of the supply and of the control wires are necessary The connection Muxln is intended for the connection of further external measuring channels The connection MuxOut serves as a link between the multiplexer and the connection EXT at the back of the instrument or the connection MuxIn of another multiplexer which is closer to the measuring instrument 37 Errors 11 Errors and their correction 1 38 After switching on the display remains dark Proceed according to the chapter First operation of the T 4200 Please contact your supplier if the fault cannot be corrected Faulty measuring values are displayed Check whether the parameter sets belonging to the sensors connected are assigned to the measuring channels see chapter Manual Operation The text Battery too low appears on the display The battery to buffer the thermometer s memory is empty Have the battery c
31. graphics and table windows are updated at the same time Every two minutes or rather with each record for intervals gt 2 minutes the measuring data is saved on the hard disk so that it doesn t get lost in case of a system or power failure After activating the instruction Drucken print the dialogue box Drucken printing appears By selecting the appropriate option you can choose what is to be printed the table certain graphics or all graphics either all arranged on one page or one page per image Tip In the top right corner the image saved in the file LOGO BMP is printed You can create your own logo with the program Paintbrush for example Through the activation of the instruction Seite einrichten page setup the dialogue box Seite einrichten page setup appears with the following options In Titel title you can enter a headline printed at the top of each page e g for user data If the option Tabelle mit Rahmen drucken Print table with frame is not activated the table will be printed without frames and without the logo in the font set before Thus the output rate is considerably nn raised especially for matrix printers In the option Seitenr nder margins you can enter the appropriate margins in cm The size of page has to be set with the instruction Drucker einrichten printer setup 33 SmartGraph With the instruction Drucker einrichten printer setup you can select
32. gue box Datei ffnen Open file Enter the name of the respective file in the field Name name or select a file name from the list Dateien files or choose a file from another directory by selecting the appropriate directory from the list Verzeichnisse directories 32 SmartGraph Selecting the function Datei speichern unter save as you can save the data in a different file Here a dialogue box appears in which you can enter a new name for the current file Warning If you select a file which does already exist and if you confirm the further inquiry this file is recorded over and the old data from this file is deleted The menu element Start Recorder opens the recorder window and starts up a storage of measuring values using SmartGraph comparable to a writer This menu element changes into Stop Recorder as soon as the recording is running Here you are asked for a file name to save the recorded values Apart from that you can set the appropriate recording interval from 1 second up to a maximum of 60 minutes Afterwards you click onto the Start button The graphics windows display 10 minutes going back from the actual PC system time When the right hand margin is reached in the image the graphics are moved to the left by one minute In the recorder window the most recently recorded values are displayed If the alarm borders are exceeded in any way the respective measuring value is written in red The
33. h one of the deviation functions which are necessary have to be entered 26 Sensor specific Parameters c The input of temperature resistance couples enables the user to enter the values from the calibration data of the temperature sensor Afterwards the program calculates the coefficients of the deviation function and later saves them in the new parameter file After all the sensor coefficients have been entered or calculated the program asks for the temperature minimum and maximum which the parameter set will be valid for The instrument will display an error message if the set temperature range is exceeded in either way Finally the user is asked whether the newly established parameter set is to be transmitted to the measuring instrument In case it needn t be transmitted it is saved only in the current drive of the PC How to transmit the parameter set is described in chapter 8 2 2 8 2 2 Transmitting a parameter set to the T 4200 After selecting the menu element to transmit a parameter set the name of the parameter file is asked for Afterwards the program reads the list of parameter sets available in the thermometer Then the following list of parameter sets contained in the instrument is displayed on screen filename shortinfo EN60751 T EN60751 Standard ITS9OSTD T ITS90 Standard Picture 8 5 Presentation of the thermometer s parameter sets In picture 8 5 some of the parameter sets available in the thermomet
34. hanged by an expert Warning The following work may be carried out by a trained expert only as mains voltage may occur in the instrument Disconnect from the mains by pulling out the plug Open the case of the instrument by unscrewing the four upper screws in the sides of the thermometer and lift the upper lid Replace the instrument s battery see chapter Specifications After the replacement of the battery the parameter sets have to be reloaded see chapters Establishing sensor specific parameters and Manual operation Afterwards the parameter sets and the sensors connected to the measuring channels have to be co ordinated again In addition to that the other settings of the thermometer have to be checked and adjusted if necessary The text SYSTEM FAILURE and a number from 1 to 4 appears on the display This error cannot be corrected by the user Please contact your supplier The text All chs are off appears on the display You have switched off all the measuring channels You will have to switch on at least one of the measuring channels see chapter Manual operation The text Params error appears on the display The assignment of parameter sets to the measuring channels has been changed This can be caused by the connection or disconnection of an external multiplexer Check whether the assignment of parameter sets to the measuring channels is still correct see chapter Manual operation 10 11
35. imum Check whether the correct type of sensor has been used or whether the measuring range has been exceeded caused by the parameter set You will find the maximum temperature value in the appropriate parameter file on your PC see chapter Establishing sensor specific parameter sets The text to small appears on the display In case the set unit is ohm The resistance value is lower than the minimum Check whether the correct type of sensor has been used In case the set unit is C K or F 39 Errors 13 14 15 16 17 The measured temperature value is lower than the minimum Check whether the correct type of sensor has been used or whether the measuring range has been exceeded caused by the parameter set You will find the minimum temperature value in the appropriate parameter file on your PC see chapter Establishing sensor specific parameter sets The text range err appears on the display This error is caused by the effects of exceeding the measuring range which can for example occur during differential measurements The text interface err and a number from 1 to 3 appears on the display An error has occurred during the communication with your PC Switch off the instrument and then switch it on again Restart the PC program The text Mux Error 1 appears on the display The external multiplexer has got an inadmissible version number or in case more than one multiplexers are used their log version n
36. itched on hum voltages can be effectively suppressed even if the mains frequency diverges from its nominal value The excellent long term stability is guaranteed by the measuring method as well as the usage of a high quality hermetically sealed precision resistance Due to the low measuring current and the instrument s insensitivity towards thermoelectric voltages and parasitic capacities and inductances it is possible that sensors of various makes can easily be exchanged The conversion of the resistance value into a temperature value makes a completely different demand on the manufacturer Whereas it is satisfactory for the measurement of the sensor resistance if the manufacturer ensures a sufficient precision of the measuring instrument in many cases the user himself has to enter the sensor s coefficients which are necessary to calculate the temperature values Here user friendliness is of utmost importance This demand was already taken care of during the planning stage of the T 4200 In the instrument the calibration coefficients required for calculating the temperature values are organized in sets of parameters The user is able to assign a set of parameters to a measuring channel and thus to the sensor connected to it The assignment is carried out with the help of a menu with short and clear descriptions of the different sets Only one set of parameters at a time can be assigned to each measuring channel The same set of parameters however
37. lick the left mouse button at the same time The levels of presentation are year month week day 6 hours 1 hour 10 minutes 1 minute and 10 seconds see also instruction enlarge in the menu edit Each graphics window has got image window scroll bars at the bottom to view different areas of the image You have to click on the left or right arrow to move the graphics one step to the left or right To leaf through the area just click on the left or right part of the scroll bars to move to the left or right 9 3 4 Documentation For printing you have to use the instruction Drucken Print in the menu Datei File Here the image will be printed by the printer installed in windows with full resolution The content of graphics windows can be transferred into other applications e g MS Word MS Works or Wordperfect for Windows using the Windows Clipboard For an numerical processing of measuring values the data should be saved in a text format so that it can afterwards be read by a spreadsheet like for example Excel etc Click into the relevant window to activate it or select it from the menu Fenster Window Now select the instruction Kopieren Copy in the menu Bearbeiten Edit Change your application In your new application choose Einf gen Paste in the menu Bearbeiten Edit 9 4 Description of the menu instructions 9 4 1 File menu The selection of a file is done with the dialo
38. lish sensor specific parameters To install the PC program to establish sensor specific parameters the program disk has to be inserted into your PC Now the installation program INSTT can be called on the DOS level At first this program allows to set the user language After that it asks in which drive a new directory for the program SEN4200 should be opened and what to call it After that this directory file along with the subdirectory SENSDATA is created Then the program SEN4200 is copied into the new file In addition to that two parameter sets are copied into the subdirectory SENSDATA The copied sets are a parameter set for temperature sensors with the standard coefficients according to EN 60751 and a parameter set for a standard sensor according to ITS 90 Furthermore the installation programme wants to know which of the PC interfaces COM1 or COM2 are used for thermometer The installation program enters the appropriate interface into the file T4200 CFG The RS232 interface of the instrument has to be connected with the appropriate PC connection used by the operator Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument 8 2 Operation of the PC program to establish sensor specific parameters Whenever a new parameter set is established a new parameter file is created by the program Apart from the parameter set itself this file
39. ll number of the available measuring channels which means that it answers with 02h if no external multiplexer is connected If for example an external multiplexer with eight channels is connected the instrument will answer with 09h as channel B is not in use because of the external multiplexer Instruction code e Read size of memory If the PC sends the instruction code e the instrument will answer with the number of memory block units of 32 KB In the basic version it thus will answer with 04h 17 Operation from PC Instruction code f Reading short descriptions To read the short information on a sensor parameter set the PC firstly sends the instruction code f After that it sends the number of the parameter set The instrument will answer with the 16 character text that also appears on the display in the manual selection of a parameter set In case the parameter set is defect or not available the instrument will send the message NAK Instruction code g Reading the value memory To read the memory of the measured values the PC sends the instruction code g The instrument then sends the content of the value memory Here the measured values are transmitted as decimal point numbers in the single precision format according to IEFE Instruction code h Reading the latest measured value To read the latest valid measuring value the PC sends the instruction code h and the channel number The thermometer will
40. lues The user can find a description of the error on the display of the measuring instrument 9 3 2 Graphical and tabular presentation of the measuring values For a graphical and tabular presentation of the measuring values one has to use the instruction ffnen Open in the menu Datei File SmartGraph will now present the measuring values graphically and tabulated in windows These windows can be moved enlarged or reduced to a symbol They can overlap or be presented one below the other If you have used other Windows applications before the operation will soon be familiar to you 9 3 3 Analyzing and processing of measuring values Every operation in any graphics window is also carried out in all the other graphics windows The graphics windows thus always present the same time span If displayed one over the other the diagrams can be compared very well To analyze the measuring values the time span can be zoomed to up to 10 seconds As soon as you move the pointer of the mouse into the area of presentation of a graphics window it changes into a magnifying glass To enlarge a specific area you have to put the magnifying glass over it and double click the left mouse button The graphics are now zoomed to the next level keeping the selected area in the middle of the presentation To zoom out you just have 31 SmartGraph to double click the right mouse button Alternatively you can hold down the shift button and double c
41. n the appropriate calibration coefficients to the channel which has been connected to a new sensor If the coefficients of a new sensor are not yet stored in the instrument the user is able to establish them using the software which is included in the package The complete establishment and control of the calibration coefficients is done on the PC New calibration coefficients may easily be entered from your PC into the T 4200 with the help of this software 3 Specifications Spezifications The following specifications are only valid for a nominal operating voltage of 230V 50Hz and an environmental temperature of 23 C Measuring range Resolution Measuring uncertainty Measuring channels Sets of calibration data Sensors Plug and socket connectors Measuring current Measuring time Long term stability Temperature coefficient Display Units Interface Baud rate Operation Memory Supply Fuses Size Weight 200 C up to 962 C according to ITS 90 200 C up to 850 C according to DIN EN60751 1 mK 10 mK optionally 5mK in the range of 50 C up to 250 C 2 optionally up to 81 with multiplexers 21 optionally up to 81 Pt 100 optionally Pt 25 in a four conductor technology standard length of cable up to 2 m Lemo 1S quadripolar in front panel about 0 5 mA switched direct current about 1 mA for Pt 25 about sec per channel about 0 1 sec with reduced resolution lt 5 mK
42. o which sensor a parameter set belongs After starting the PC program the following menu will appear lt a gt define sensor lt b gt copy sensordata from disk to T4200 lt c gt list filenames on disk lt d gt display file lt e gt list sensordata at T4200 lt f gt delete sensordata at T4200 lt x gt end Picture 8 1 Menu after program start The user now has the following possibilities of operation a Establishing a new parameter set b Transmitting a parameter set to the T 4200 c Display of parameter files available on the hard disk d Looking at a parameter file on the hard disk e Display of parameter sets available on the thermometer f Deleting a parameter set from the instrument 23 Sensor specific parameters x Stop program In case the user wants to delete one of his own parameter files this can be done with the appropriate DOS instruction 8 2 1 Establishing a new parameter set After a has been chosen from the menu the user first has to enter the name of the new parameter file After that he can enter a short description of the sensor consisting of a maximum of 16 characters Using this short description the user has to assign the measuring channel to the parameter set Afterwards the user may enter another five lines of information In those five lines he should make a note of the specialities in defining the sensor Among other things those lines should help the user to find a certain parameter file on
43. on and the pointer magnifying glass Using the instruction Y Bereich area Y the range of the current graphics window is changed to the set values Selecting the function Alarmgrenzen alarm borders alarm borders will be added into the graphics windows You will have to enter a minimum and a maximum for the alarm borders 9 4 3 Window menu The window menu contains instructions for the arrangement and selection of graphics and table windows Using the instruction Nebeneinander next to each other the windows are 34 SmartGraph arranged next to each other or above one another unless they are reduced to a symbol Using the instruction Uberlappend overlapping all the graphics table windows which aren t reduced to a symbol are presented in scales Using the instruction Symbole anordnen arrange symbols the graphics table windows reduced to symbols are arranged at the bottom of the SmartGraph window Using the instruction Fenster Xxx Window Xxx the selected window becomes the active window The currently active window is marked in the menu 9 4 4 Options menu Using the instruction COM Schnittstelle CCOM interface an interface can be selected where the measuring instrument is to be connected Note If by mistake you have selected the interface your mouse is connected to SmartGraph will display the message Hardware gesperrt hardware blocked whenever you try to open the interface Using
44. onnection of a PC Pin 7 to RTS connection of a PC Pin 3 to TXD connection of a PC Pin 8 not connected Pin 4 to DTR connection of a PC Pin 9 not connected Pin 5 earth Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument 6 Manual Operation Any temperature measurement with resistive sensors consists of two steps which is due to its principle In the first step the resistance value of the temperature sensitive sensor is taken In the second step the measured temperature value must be calculated from the sensor s resistance value Due to the accuracy required for the resistance measurement three main problems occur for the manufacturer of such thermometers Manual operation an excellent linearity of the resistance measurements has to be guaranteed the measurements require a long term stability to achieve the required resolution the thermometer has to be highly interference proof In the T 4200 the good suppression of interference and the excellent linearity are ensured by a digital analog converter developed especially for this thermometer Here an integrating conversion method is used which guarantees not only an excellent suppression of hum voltages but also a very high linearity Due to the fact that the T 4200 unlike many other comparable thermometers synchronises itself to the current supply frequency when sw
45. r the mains voltage set in the instrument corresponds with your mains supply before you connect them You can recognize the set voltage at the back of the instrument above the mains plug In case the set voltage does not correspond with your mains supply you must get an expert to carry out the following steps 1 Remove the power supply cable 2 Open the cover above the mains plug using a small screwdriver without force To do this insert the screwdriver into the little recess above the voltage indicator and turn slightly see picture 5 2 3 Insert the screwdriver from the top into the red plastic body and pull out the fuse holder 4 Check whether the right fuses are inserted see chapter Specifications If needed the matching fuses have to be inserted Safety instruction Only the prescribed fuses are to be used 5 Insert the fuse holder so that the desired voltage is readable see picture 5 2 6 Close the lid above the fuse holder First opertion As soon as the right voltage is chosen the instrument may be switched on It is now in the normal operation state Note The sockets of the instruments which are not in use should be covered with plastic lids Thus it is ensured that the measurements are not interfered by electrostatic discharges The required lids for the two nine pole plugs at the back of the instrument and for one of the sensor plugs are included in the delivery 5 Description of the instrument In th
46. rential measurement the PC sends the instruction code v followed by Olh To switch it off again the PC sends v followed by 00h The thermometer will answer with ACK after every change Instruction code w Switching a measuring channel on off To switch on a measuring channel the PC sends the instruction code w followed by the number of the channel e g Olh for channel B and Olh To switch off the appropriate channel 00h is sent as a third code If the selected measuring channel is not available the instrument will send NAK Otherwise it will switch the appropriate channel on or off and send ACK Instruction code x Assignment of a parameter set To select a sensor parameter set the PC sends the instruction code x followed by the number of the measuring channel connected to this sensor followed by the number of the parameter set to be used The thermometer will send NAK if the number of the parameter set is bigger than the possible maximum Otherwise the demanded function will be carried out and the instrument will send ACK Instruction code E3h Reading of the external multiplexer s version number To read the version number of the external multiplexer the PC sends the instruction code E3h If no multiplexer is connected the thermometer will answer NAK Otherwise it will answer ACK read the version number of the multiplexers and send them to the PC Instruction code E4h Reading version log number of
47. test wether this channel is on If not it will answer with NAK If there is no new measurement value it also will answer with NAK If there is at least one value which hasn t been transmitted from the thermometer to the PC the measuring instrument will firstly send ACK followed by and then the measured value in the single precision format according to IEEE STD 754 Instruction code o Release a warm boot of the instrument To release a warm boot of the thermometer the PC sends the instruction code o The instrument will reply with ACK and carry out a warm boot afterwards With the instruction code a the PC then can check whether the thermometer is ready to use After a warm boot in contrast to a cold boot no keys are blocked and the ZERO function as well as the storage of measured values are not deactivated Furthermore no search for external multiplexers is carried out after a warm boot Instruction code p Reset of value memory and start up of storage To reset the value memory and start up the storage of measured values the PC sends the instruction code p The instrument will answer with ACK and start up a new series of measurements 18 Operating from PC Instruction code q Select baud rate To set the baud rate the PC sends the instruction code q followed by the appropriate code The following codes are used O h for 1200 baud Olh for 2400 baud 02h for 4800 baud and 03h for 9600 baud If the
48. that the parameters for the sensor connected to channel A are to be selected The expression params 00 shows that the parameter set 00 is used The second line displays the short description for the parameter set 00 entered on the PC With EN 60751 standard the manufacturer of the T 4200 has labelled a sensor parameter set which is described by means of the standard coefficients of EN60751 Using the keys fl and U the number of the parameter set which is to be used can be changed Then the according short description appears in the second line By pressing the ENTER key a parameter set is assigned to a measuring channel By pressing ESC the previous menu level is reactivated without assigning a new parameter set to the selected measuring channel 6 3 5 Loading the standard settings To set the instrument back into its original status the standard settings can be re loaded To do this the main menu element load standard configuration can be selected using the keys eo or tosh load std cfg amp gt ESC ENTER Picture 6 15 Main menu element loading standard configuration Afterwards this menu element can be activated with the ENTER key so that the following display will appear load std cfg 14 Manual Operation sure ESC ENTER Picture 6 16 Display after activation of Loading standard configuration Pressing ESC you can leave this level of the main menu again If you press ENTER the standard
49. the hard disk of his computer After entering the last line of information the following menu appears Industrial thermometer low alpha E Laboratry thermometer high alpha ITS90 end Picture 8 2 First menu when defining a new parameter file The user now has to decide whether the temperature sensor is intended for industrial applications or for laboratory use The main difference between those two sensor types is shown in their alpha value Sensors for industrial applications have got an alpha value of 3 85 e 10 This kind of sensor is described in the EN 60751 for example The laboratory reference normals made of pure platinum show an alpha value of more than 3 9 e 10 Those sensors are used for measurements according to the international temperature scale from 1990 ITS 90 as interpolation instruments between the fixed points prescribed in it If the user does not know what type of sensor it is he can get this information from the supplier of the sensor 8 2 1 1 Establishing a parameter set for industrial temperature sensors If the user selects a temperature sensor for industrial applications the following submenu appears Here the user can select one out of three methods for establishing the parameter set 24 Sensor specific Parameters lt a gt Standard EN 60751 coeffizients lt b gt Callendar van Dusen coeffizients lt c gt Callendar van Dusen couples lt x gt end Picture 8 3 Submenu for the
50. the instruction Dateiformat file format you can choose between internal file format for fast reading and saving and text format readable for other programs In the text format the data is stored separated by tabulator characters line by line and can immediately be read in word editing programs or spreadsheets Many spreadsheets like for example MS WORKS or MS EXCEL expect a comma for the decimal point in the German version This is why you ought to mark the respective option if you want to read the data in those programs 9 4 5 Help menu Under Erg nzungen zum Handbuch additions to the handbook you can find the latest changes and additions which have been added after the printing of this handbook The instruction Inhalt content starts up the online help and displays the table of help topics By pressing Hilfe benutzen using help you will get an introduction into the Windows help system Pressing Info information you will be shown the version number and a note on the copyright of the current program version 9 5 Storing the measuring data on the hard disk SmartGraph creates the subdirectory data additionally to the SmartGraph program directory Unless something else was entered during the installation this directory is called c sg_T Measuring data can be saved either in the internal format SGR or in the text format TXT see instruction Dateiformat file format in the menu Optionen options
51. the menu Datei File of the program manager Windows 3 11 or rather from the task bar Windows 95 After that enter the instruction a setup only if you have inserted the disk into drive a otherwise you have to enter the appropriate name of the drive and choose OK Follow the instructions on the screen If you take over the settings the new program group SmartGraph is created and the program files are copied into the subdirectory c sg_T As soon as the installation is completed you can find the SmartGraph program icon in the newly created program group SmartGraph or in the program group you have entered Detailed instructions on how to work with the program manager can be found in your Windows manual Apart from that you can always get help on the relevant active menu element by pressing the button F1 9 3 Introduction into SmartGraph 9 3 1 Recording measuring values SmartGraph contains a recorder to record any measured values of the connected thermometer on your PC For the communication with SmartGraph the baud rate of the instrument has to be set on 9600 When starting a storage SmartGraph blocks the instrument s keyboard so that its settings e g the unit cannot be changed during a storage The file Sensors ini contains information to describe the measured values transferred from the thermometer This information is organized as channel description sets Sensor2100 Hold Temperatur A Name TA Unit C
52. tion coefficients a short description up to 16 characters of the sensor entered by the user himself on his PC is shown to avoid any operational errors Warning The user has to ensure that the selected calibration coefficients belong to the sensor in use If the user selects incorrect calibration coefficients the measured values might be wrong Note In case the user swaps any of the connected sensors he obviously has to swap the numbers of the parameter sets assigned to the measuring channels as well At first the element Selection of sensor parameters has to be chosen from the main menu with the keys lt or gt sensor params amp gt ESC ENTER Picture 6 12 Main menu element Selection of sensor parameters As soon as this element is activated with the ENTER key the following is displayed sensor params ch A Picture 6 13 Display after activation of Selection of sensor parameters 13 Manual operation At first the measuring channel has to be selected whose sensor parameters have to be set After that the measuring channel A or B is chosen with the ENTER key You can leave this menu element by pressing ESC For the following pictures it is assumed that channel A has been selected and clicked into with the ENTER key footed FIN60751 Standard Picture 6 14 Display when sensor parameters are set for channel A The characters ch A in the top left corner of the display show
53. ton arrow right is used for the menu control only 9 The button arrow down vy is used for the menu control only 10 The button escape ESC is used for the menu control only 11 Pressing the button enter ENTER starts up the user s menu 2 3 4 2 pa 230 V 10 a o RS 232 EXT Picture 5 2 Back of the instrument Picture 5 2 shows the elements explained in the following 1 Display of the set supply voltage and lid of the fuse holder see chapter Usage of the T 4200 The on off button switches the supply voltage on or off Socket for the supply voltage Socket for the serial interface RS 232 a A W N Socket for an external multiplexer Description of the instrument Safety instruction Only the prescribed cables are to be connected to the instrument The operator has to ensure that no inadmissible voltages reach the instrument 5 1 Assignment of plugs The plugs to connect the temperature sensors No 1 and 2 in picture 5 1 are constructed in a four conductor technology The assignment of plugs is explained by picture 5 3 I U U hk Pt100 Pin 1 I Pin 4 I 7 Pin 2 U Pin 3 U2 Picture 5 3 The assignment if a temperature sensor in four conductor technology The socket of the serial interface No 4 in picture 5 2 is assigned in the following way Pin 1 not connected Pin 6 not connected Pin 2 to RXD c
54. umbers are not identical Contact your supplier The text Mux Error 2 appears on the display A too high number of measuring channels has been recognized Reduce the number of the external measuring channels or contact your supplier The text Mux Error 3 appears on the display A transmitting error has occurred during the communication with the external multiplexer Switch the instrument off and on again 12 Guarantee and repairs The manufacturer gives a twelve month guarantee on the thermometer The guarantee includes parts and work The cost of transport and any damage resulting from transport in case of a repair have to be paid by the sender The full address of the sender a commission of repair and a description of the error have to be enclosed with any instrument sent in for repair works The instrument has to be wrapped in such a way that it is protected from damage during transport Before carrying out a repair the manufacturer informs the sender about the estimated cost of repairs and asks the sender to give his consent Any costs for the return transportation and for the insurance of the repaired instrument have to be paid by the sender The repaired instrument is sent back the cheapest possible way 40 Notes Notes 41 Notes 42
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