PicoLog - Electrocomponents
Contents
1. Min Frequency 100 Hz No of readings 10 T Combination method Average 2 Total sampling time 1500 us B444444444444444444444444444444444444444444444A The channel name will appear on parameter menus so that you can use the channel in reports and as inputs to calculated parameters The two lines of heading will appear in the headings of tabulation reports The measurement mode can be one of the following c5 c5 c5 c5 c ADC counts single ADC conversion scaled in ADC counts Inst Volts single ADC conversion scaled in volts Frequency frequency in Hz AC Volts RMS AC voltage excluding any DC component DC Volts Average voltage dB AC voltage expressed as dB 0dBz0 775V The ADC counts and Inst Volts values are derived from single readings The other parameters are derived by measuring a block of approx 5000 conversions Min Frequency is present only when the measurement mode is Frequency ADC volts DC volts and dB Set it to the minimum AC frequency you wish to measure or ignore for DC volts It is used to determine the period over which the block of samples is to be taken Version 2 0 rev 3 Page 41 PicoLog user manual If you just wish to measure simple voltages use Inst Volts if you are collecting data fast sampling interval is milliseconds If you are measuring slowly seconds or longer use DC volts to get a better average reading Data collected using measuremen2. PicoLog user manual 3 Quick Guide The rest of the manual explains in detail the operation of each menu and form in the system First here is a quick guide to the things that you are most likely to want to do 3 1 Installing the PicoLog program Insert the distribution diskette into drive A and type in a install The computer will first ask you what directory to install into then it will offer you a menu of modules to install drivers PicoScope PicoLog et cetera If you just want to install PicoLog make sure that there is ves next to PicoLog and No next to the other modules 3 2 Setting up for your computer Use each of the options on the Setup menu to define the type of screen display printer and ADC and the default locations for data and program files 3 3 Collecting data for the first time All of the options that you require to start a new run are on the Collect menu First select the Define new run option the computer will first ask for a filename for the new run then the computer will ask for the sampling details duration number of samples then the channels to collect data from Once you have specified a filename the computer will automatically update the file each time you change any of the run details and at regular intervals whilst collecting data Version 2 0 rev 3 Page 5 PicoLog user manual You may wish to define the parameters to be derived from the data you collect for example to convert ADC read
3. Report Experiment Voltage Parameter ADC Channel value An analog to digital converter has one or more channels each channel is used to measure a voltage which is a representation of a real world parameter like pressure or temperature The program takes a number of readings from a channel and combines them to form a sample During each sampling interval the program can do this on several channels The program collects samples at regular time intervals the sampling interval It collects a specified maximum number of samples then stops recording you can stop it recording at any time Page 2 Version 2 0 rev 3 PicoLog user manua before the maximum number of samples A sequence of samples is referred to as a run each run is stored in a separate file on disk The program can scale the values for a channel to produce a parameter a parameter is a real world measurement derived from the channel values for a sample You can use linear scaling table lookup or an equation to convert the channel values into real world units Linear conversion is suitable for use with sensors which have a linear response for example strain gauges and thermocouples table lookup or equation scaling must be used when the sensor output is non linear for example a thermistor Equation scaling can be used both for scaling channel data and for combining parameters for example you could measure two temperatures then use an equation to eval
4. the same samples parameters and reports or you can first edit the details using the Add or edit options You start the repeat run exactly the same as the first run and all subsequent steps are the same Page 6 Version 2 0 rev 3 PicoLog user manual Use the Edit Notes option to annotate reports with information about each particular run You can attach the notes to reports this will also appear if you request a file index for a directory 3 5 Reports from an old run If you wish to examine or print reports for an old run you should first read in the run using the Load existing run option on the File Management menu If you are not sure which run you require use the File index option to check the notes date and time and number of records in each of the files in a directory Once you have loaded a run all of the functions that you require are on the Generate reports menu You can define new parameters and reports then to print or display the reports You can also write text reports to disk in a format suitable for entry into a spreadsheet or a database 3 6 A simple example The following is an example of a simple experiment in which you wish to record the voltage across a battery as it discharges in a circuit using an ADC 12 After you have installed PicoLog on your computer see section 3 1 you need to set up the details about your system 1 Type picolog and press Enter the main menu appears 3 6 1 S
5. Home and End keys move to the start or end of the menu For file menus the program enables you to browse through all of the files on the computer To do this each file menu will contain three types of options drives directories and files Drives appear as a single letter followed by a colon For example if you have two floppy disks and a hard disk the letters A B and C will appear Selecting a drive will show you the files in the current directory on that drive Directories are up to 8 letters long and are contained in angle brackets The directories shown are sub directories of the current directory The Page 24 Version 2 0 rev 3 PicoLog user manual special directory lt gt is the parent of the current directory Selecting a directory will show you the files and sub directories in that directory All other items are files selecting a file will load it 4 2 Forms 4444U EDIT PRINTER SETUP W4444 Printer Deskjet x X Ports LPT1 i Resolution High K Orientation Landscape m B444444444444444444444444444444A When the computer needs a set of information from you for example details about a trace it will display a form on the screen The form is made up of a number of fields places where you can enter information and sometimes fields where the computer displays information that you cannot change Normally each field is preceded by a label which explains what to put into
6. Right later Z Zoom X 7 U Unzoom X Zoom Y Unzoom Y X 8 Pan Up h ae te pan Down X P Print graph Esc X Exit from graph B444444444444444444444444444444A Once you can remember these options you can type them in directly without typing in F1 first Page 26 Version 2 0 rev 3 PicoLog user manua 5 Main menu When you start up the PicoLog program it first displays a copyright notice then it displays the main menu 444444444444U MAIN MENU W4444444444444Q Setup Orly ADC jossumteir geile Display voltages Collect data new or repeat run Generate reports old run File management Exit from program x B44444444444444444444444444444444444444A Move the highlight to the option that you require then press enter Most options lead to sub menus when you exit from the sub menu by pressing escape you will return to the main menu w X E 3X You will normally only need to use the Setup menu when you first install the unit Display voltages s useful to check that the electronics connected to ADC is connected and working properly The Collect menu contains all of the functions that you will need before and during data collection specify a filename define channels parameters and reports start and stop collecting and display reports whilst collecting The Generate reports menu is used once a run is complete or after you have loaded an old run to edit param
7. be difficult to see or invisible If you run into trouble for example the menus become invisible delete the file PICOLOG SET Version 2 0 rev 3 Page 29 PicoLog user manual 6 2 Interface options 44U INTERFACE OPTIONSW44444 ADC Apei B44444444444444444444444444A This menu option enables you to specify the type of interface and the base addresses for the analog and digital boards The interface can be the name of a type of Pico ADC for example ADC 10 TC 08 or DEMO The DEMO option will provide a set of dummy data for demo purposes even when no instrument is connected When you press F10 the computer will ask for more details about the device that you have selected for example 444444444UEDIT SETUP 4444444 x x Printer port LIETI X x x B4444444444444444444444444444A See the manual for your ADC for more information about the setup for your particular converter Page 30 Version 2 0 rev 3 PicoLog user manual 6 3 Graphics Printer details 4444U EDIT PRINTER SETUP W4444 Printer Deskjet Port LPT1 Resolution High Orientation Landscape x B444444444444444444444444444444A This menu option is used to specify the type of printer to be used for graphics output You can also specify that you wish to write graphics output to a disk file Warning graphic files can be very big it also enables you to sel
8. menu 3 7 5 Flow meter scaling 1 Select the Add or edit parameters menu option 2 Select the NEW menu option 3 Set the name to Flow Rate A Set Heading lines 1 and 2 to Flow and Rate 5 Set the units to 1 min 6 Set the Scaling method to Linear 7 Press F10 to save the parameter details the computer will display the EDIT LINEAR SCALING form 8 Set the raw parameter to Flow Meter 9 Time for some more calculations According to the data sheet the flow rate sensor outputs a frequency which is 25Hz per litre per minute Set the offset to 0 litres per minute and the slope to 1 25 which is 0 04 litres per Hz 10 Press F10 to return to the Collect menu 3 7 6 Power a derived parameter Page 18 Version 2 0 rev 3 PicoLog user manual The last parameter to specify is the power which we calculate from the temperature difference and the flow rate 1 Select the Add or edit parameters menu option 2 Select the NEW menu option 3 Set the name to Power 4 Set Heading line 1 to Power 5 Set the units to kw 6 Set the Scaling method to Equation 7 Press F10 to go to the EDIT EQUATION SCALING form 8 Move the highlight to parameter A and press the space bar until Inlet temperature appears 9 Likewise set B to Outlet temperature 10 Set C to Flow rate 11 Type in an Equation which is B A c 4 192 60 B A is the temperature difference produced by the boiler C 60 is the n
9. names do not appear on this menu because you cannot edit them other than as ADC channels though channels may be used as parameters in nearly all other places Select the NEW option to add a new parameter or one of the other entries to edit that parameter 444444444444U EDIT PARAMETER W444444444444Q Name Air temperature A Heading line 1 Air Heading line 2 Temp 2 Units e a Field width 5 Decimal places 1 Scaling Linear B444444444444444444444444444444444444444444A The parameter name and units will appear on menus and on graphs The headings and units will appear on tabulated reports The field width and decimal places are used to define the format of information in tabulated reports With a field width of 6 and 2 decimal places a number will appear as ddd dd Field width must be 1 8 and decimal places must be less than field width The scaling is usually used to convert a channel value into some engineering units for example pressure or temperature The scaling method can be Linear Table lookup Or Equation Linear scaling is suitable for use when there is a linear relationship between the voltage produced by a sensor and the Version 2 0 rev 3 Page 43 PicoLog user manual parameter that it measures for example strain gauges and thermocouples Table Lookup is useful when you have a set of input reading for different values of the
10. notes option can be either None Notes 1 or Notes 2 This is useful if you carry out a number of similar runs the title can be the same for every run but the notes can contain information specific to each run One sample every is useful if you have a lot of samples You can generate a report which contains say only one sample every 10 this will display and print much quicker Page 54 Version 2 0 rev 3 PicoLog user manual Min and max x specify the range to be displayed on the graph in the units of the sampling interval eg for a sampling interval of 500ms the units are milliseconds Once the run is completed you can alter the x scale whilst displaying the graph The format defines for format for the scale on the X time axis It can be linear for example 0 5000 minutes or date time for example 16 20 to 21 45 or 03Jul92 to 12Jul92 Note the min and max X must still be specified in linear time even if you select date time format for the x axis scale The graph can have an axis scale on each side so that parameters measured in different units can be displayed on the same graph The parameters can then be assigned to either the left of the right axis If all of the parameters have the same scale only one axis is necessary The two enabled fields say whether an axis is to be displayed on the corresponding side If for example all of your readings are temperatures you can use the same scale for all parameters If you w
11. program will print out a hardcopy version of the setup Version 2 0 rev 3 Page 61 PicoLog user manua 10 File management 44444U FILE MANAGEMENT W44444444 Mods ole mun rron Ciak Display or print index Delete one run Copy one run B Copy all runs to backup path Extract records 44444444444444444444444444444444 D x x ox X ox X 3 10 1 Load old run from disk When you select this option the program displays a menu of all of the run files in the data directory defined in the setup It also displays all of the directories in this directory and all of the drives You can either select one of the files in the current directory or select a different directory or drive to see what run files there are in that directory 10 2 Display or print index When you select this option the program produces a report showing details for each of the files in the data directory The details displayed are the filename date time number of samples and the first line of notes 1 Page 62 Version 2 0 rev 3 PicoLog user manual 10 3 Delete one run When you select this option the computer displays a menu like the one to load a file When you select a file the program asks you to confirm that you wish to delete the file then it deletes that file 10 4 Copy one run When you select this option the program first displays a menu like the one to load a run When you select a file it displays the fo
12. specify whether one or other sets of notes appear on the report Page 58 Version 2 0 rev 3 PicoLog user manua 9 Generate reports 44444U GENERATE REPORTS W44444444 Add or edit parameters Add or edit reports Edit notes Display report Print reports B Write text report to disk Display run setup 444444444444444444444444444444444 gt 3e 3 33 3 3 G O This menu provides you with all of the functions that can be used once a run has been completed You can add or edit parameters and reports and display reports In addition you can print out reports and write text reports to disk You can also display the run setup full details of the channels parameters and reports for the current run 9 1 Add or Edit parameters This menu option is identical to the Add or edit parameters option on the Collect menu 9 2 Add or Edit reports This menu option is identical to the Add or edit reports option on the Collect menu 9 3 Edit notes This menu option is identical to the Edit Notes option on the Collect menu Version 2 0 rev 3 Page 59 PicoLog 9 4 Display report 444444U DISPLAY REPORT W44444444Q Temp diff All temps Y vs Time Graph Tabulation d B44444444444444444444444444444444A user manual When you select this option the program gives you a menu containing the name and type of all of the reports suitable for display once a run is c
13. this 444444UDISPLAY VALUES W444444Q ADC value DDS A DC Volts PEG X AC Volts 0 05 Frequency 1050 5 i dB 23 8 B444444444444444444444444444444A See the manual for your ADC for a more detailed description of the display Page 34 Version 2 0 rev 3 PicoLog user manua 8 Data collection menu 444444 COLLECT MENU W444444Q Define new run Repeat current run Start recording Display report x Stop recording x Edit sampling rate B A Add or edit channels Add or edit parameters Add or edit reports Edit notes 444444444444444444444444444 This menu enables you to do all of the things that you might wish to do before or during a run There are a number of restrictions on what you can do when using this menu The principal restrictions are you must specify a run filename before doing anything else you must enter sampling interval and channel details before starting a run you cannot change the sampling interval and channel details whilst a run is in progress or once the run has completed you cannot exit from this menu whilst a run is in progress Note the Define new run option goes directly to the Edit sampling rate and Add or Edit Channels options Version 2 0 rev 3 Page 35 PicoLog user manua 8 1 Define new run Directory C LOGDATA Filename RUN25 B44444444444444444444444444A This opt
14. whether any of the notes entered using the Edit notes option will be added to the title It can be either None Notes 10rNotes 2 This is useful if you carry out a number of similar runs the title can be the same for every run but the notes can contain information specific to each run Every nth point is useful if you have a lot of samples You can generate a report which contains say only one sample every 10 this will display and print much quicker The First point and Last point specify the range of points to display Mark points with shapes and Join points with lines are two alternative ways of drawing the graph Mark draws a symbol at every point Join draws a line between successive points Join is useful when there is some relationship between successive points You can turn both of these on but normally only one is necessary Version 2 0 rev 3 Page 57 PicoLog user manual The min and max values specify the range to be displayed on the graph Once the run is completed you can alter the scale whilst displaying the graph 8 10 Edit Notes I NOT ES W44444444444444 44444444444444U ED Notes 1 Readings taken 25th Aug 92 Strain gauge failed during test Notes 2 B444444444444444444444444444444444444444444 a A This option enables you to view or enter a number of items of information about the current trace The report editing options enable you to
15. 64 Version 2 0 rev 3 PicoLog AG NOS D Rc 42 tabulation 53 ADG occa noretusi ada 31 alarm zu west 52 channel slm PELA 2 channel name 42 colour 30 combination method 43 datapath 34 dB Sead dee Fed eB tee aa oa 42 decimal places 45 display values 35 extract records 66 field width 45 Flow Meter 18 TOFITE A 8 2 eu cents a tnc t E 26 graphics printer 32 graphics screen 30 interface 31 measurement mode 42 menle sea ese ae 25 newrun s 37 notes 54 56 59 60 number of readings 43 number of samples 40 orientation 32 parameter 3 parameter name 44 DOT ation hava ns 31 32 raw parameter 18 reading sad ed ir edes 2 repeat foe ae Rs 37 report 3 39 61 display 52 62 fill aei is 63 graphical 27 Monitor 51 52 PINE audae ite cs 62 Version 2 0 rev 3 user manual tabulation 51 X vs Y graph 52 yvstime 56 Y vs time graph 52 resolution 32 FUN oreet te aed alee ets a 3 COPY iua Meee es 65 delete 65 index 64 Odd ine Sak whee Fe 64 SAVE oii expe 37 setup 63 sample 2724 asi ik bees 2 sampling interval 2 40 scaling 3 45 equatio
16. PicoLog Data Logger Software User Manual Version 2 0 rev 3 by M K Green Pico Technology Limited 149 151 St Neots Road Hardwick Cambs CB3 7QJ GB Tel 44 1954 211716 Fax 44 1954 211880 E mail 100073 2365 compuserve com Copyright 1994 1995 Pico Technology Limited PicoLog user manual Contents Tintroduction x 1 2 Basic principles 2 225 4 hd er WERE SERES eas Leese EE 2 3 QUICK GUIDES o sr aria tee exp vot eda onte e SOR uat ene o Seog ed 5 Installing the PicoLog program ssssssssssse 5 Setting up for your computer 2 22 00005 5 Collecting data for the first time 5 Repeating a TUN CL 6 Reports from an old run nsaan anaana 7 A simple example bea haa bade bees EE Rd ba 7 Setting up the system 2 00005 8 Checking the ADC llllllllllllllss 9 Collecting data 2 5 2212 RARE 9 Monitoring during the run liliis 10 Stopping the runearly 20005 11 Additional reports on a completed run 11 A more complex example llli 13 Checking the ADC iiie RR RR 14 Sampling details ows Sas epo RI RE REE Cocks 14 Specifying the channels 2 15 Thermistor Scaling 05 16 Flow meter scaling 24er RR Rex 18 Power a derived parameter 19 Tabulation report dicate ede perite ane deco ea 20 IONS Y graph eos eh eds by ee Eug inXEDH EI PME Dd 21 NOMS is
17. REPORT form appears 3 Set the report type to monitor The report name is optional 4 Press F10 The EDIT MONITOR REPORT form appears 5 Move the cursor to the first parameter then press the space bar until sample no is selected 6 Move the cursor down then press the space bar till Battery Voltage is selected 7 Press F10 to save these details The Collect menu appears again 8 Select Display report the Display report menu appears 9 Select the monitor report you have created the computer will now display the current sample number and the voltage 3 6 5 Stopping the run early Page 10 Version 2 0 rev 3 PicoLog user manual When the battery is discharged the voltage has reached a suitably low value you can stop the run early 1 Press Escape to return to the Collect menu 2 Select Stop collecting to stop the run 3 6 6 Additional reports on a completed run You can define reports before during or after you have collected the data To add a graphical report once the run is completed 1 Select Add or edit report the Edit Reports menu appears 2 Select NEW again 3 Set the name to Battery voltage vs time 3 Change the Report type to Y vs time 4 Press F10 the EDIT Y VS TIME form appears Note the title for the graph has been set automatically to Battery voltage vs time the name you entered for the report You can change it to something different if you wish 6 Move down to the lef
18. W444444444Q X Parameter name x A Cold water temp B Hot water temp C NONE D NONE E NONE Equation x 5 aA 80 B444444444444444444444444444444444444444444A Equation scaling is useful when it is possible to calculate the scaled value for a parameter from the raw data it is also useful to derive parameters which are a combination of more than one channel or parameter Ato E are the channels or parameters that are to be used in the equation These parameters are referred to as A E within the equation The equation can be any combination of the variables A E numbers mathematical operators and the functions exp 1og 1n power mod sqrt and abs For example to convert the voltage across a 330 ohm resistor into a current I V R you could use the formula 4 330 Page 48 Version 2 0 rev 3 PicoLog 8 9 Add or Edit reports 44444444U NEW Merge sates All temps Alarms user manua ED T R Y EPORT W444444444Q vs Time Graph Tabulation Monitor B44444444444444444444444444444444A This menu option is used to specify the reports that you wish to use If you specify reports before collecting data you can view them whilst sampling is in progress You can also define additional reports after sampling has been completed or even after you have saved the report and reloaded it at a later date Select the NI EW gt option to
19. add a new parameter or one of the other entries to edit that parameter 4444444444444U ED I R EPORT W444444444444 Name Temp diff Format B4444444444444444444444444444444444444444 t wis time grag gt x x x o 3 The report name will appear on menus You don t have to give names to reports but names are useful if you have more than one report of each type The format can be one of Monitor Tabulation Y vs TimeoOrX vs X Monitor reports are useful during data collection you can display the current value of up to 8 parameters and set alarm limits on their values A tabulation report is a text report with one sample per line Each line contains the data values for up to 8 parameters Version 2 0 rev 3 Page 49 PicoLog user manual AY vs time graph is a graph of up to 10 parameters against time AnX vs Y graph is a graph of any parameter against any other parameter This is useful when the parameters are not time dependent or to look for other relationships between parameters for example temperature outdoors vs electricity used When you press F10 the computer will display a form which requests details for the specified report 8 9 1 Monitor report 44444444444444U ED ab R EPORT W444444444444 Pos Parameter FIUDOBKBWNHEO B 4 Sample no Air temp Water temp none no
20. ant to display a voltage and a temperature use both scales Label and units are added as notes to the corresponding axis Min y appears at the bottom of the axis and max y appears at the top of the axis The four parameter options specify which parameters are to appear on the graph unused parameters should be left at NONE You can specify that the parameters are scaled using either the left axis or the right axis If data collection is completed you can press F3 to display the report Press F10 to save the details Version 2 0 rev 3 Page 55 PicoLog user manual 8 9 4 Edit X vs Y report An X vs Y graph is a plot of one parameter against another A typical graph looks like this S a 2 F 2 i 6 10 en a ee as a a ias ai a A 1r T1 1 T T 7101 71 1 200 1 00d d 1 00d 2000 3000 40 wind speed Run DAPICO LOGGER DEWDATA GARAGE 10 collected 18 37 on 12Jun93 Page 56 Version 2 0 rev 3 PicoLog user manual This is the form to set up the graph 444444444U EDIT X VS Y REPORT W444444444Q Title Hempsmcuumc NECS s Notes None i Every nth point 1 D First sample 1 ig Last Sample 65000 x Mark points with shapes Yes Join points with lines Yes X axis Y axis t Param Temperature Pressure t Min 20 0 i Max 80 200 i B4444444444444444444444444444444444444444A The title and notes will appear at the top of the graph The notes option specifies
21. athe ds 50 Add or Edit reports sco PEREAT RE ERE E ERE 51 Monitor report x outied e s reda o dp ed ww iesus 52 Tabulation report 00 eee eee eee 53 Y vs Time Report ose dE dee e 55 Edit X vs Y report eem Sue ules Sek boon Pang 58 Edit NOIBS giv ack ote etitexe een ele ee nec e een EXE eco Ree nera 60 9 Generate roporis scale faxa Dax E naa SEGUE Raga id aka 61 Add or Edit parameters 2020200 0 cee eeeeee 61 Add or Edit reports 4 446 405 es s oO0see 260 osteo des 61 EdIEnOIBS 4 to uo aea RO T LR Ae eR eL t 61 Display report cues ex er EC Exe eS x RE es 62 Print report aC ao Mah ks awed oe Reka ke bee oh aes 62 Write text report to disk baveteivalovatetne i Eoo eme bed 63 Display run setup cau e seks oe RES e ERE R dE Er 63 Page ii Version 2 0 rev 3 PicoLog user manual 10 File management os orii zekm ER RR Re dnm led ERR S 64 Load old run from disk 59 3106 22 bait tu ME do as 64 Display or print Index sss det ves ERR REX x3 64 Delete one run s coc cepe eR Rede ea Sek aed Rede 64 COPY OMG TUN ceo onec cert option er are B oue nei E 65 Backup all runs Eig ev RERECRRIRRPSQDRRE RES RQEE 65 Extract records uuu uo Sa es e a Ua e e RUE ase ese a a ua 66 Version 2 0 rev 3 Page iii PicoLog user manual 1 Introduction The PicoLog data logger is a powerful and flexible program which enables you to carry out data logging and analysis It is designed to make full use of the facilities offe
22. c channel forms Action at end of run defines what to do when all of the samples have been collected You can select either Stop which stops collecting or Repeat Which start a new run It automatically increments the filename so that each run file is successively numbered Version 2 0 rev 3 Page 39 PicoLog 8 7 Add or Edit channels user manual This option is used to specify what data is to be collected for each channel The format depends on the type of ADC see the PicoLog section in the manual for your ADC for more details 4U ED Chann Therm Therm Channel Channel Channel Channel Channel Channel Channel Channel 4 5 6 E 8 9 un un I ADC 11 CHANNI el 1 un ocouple 1 ocouple 2 used used used used used used used 10 unused 11 unused B4444444444444444444444444 a EL Ei WA A For multi channel ADCs the computer first displays a menu showing which channels are already allocated You can either select a channel that is already in use and change the settings or you can select a new channel Page 40 Version 2 0 rev 3 PicoLog user manua The computer next asks for information about the channel 4444444444444U EDIT ADC 10 CHANNEL W444444444Q Channel name Thermocouple i Heading line 1 Thermo Heading line 2 couple x Measurement mode DEmViolkies x
23. cifies what to do if the raw value is outside the range of values supplied If the value is below the minimum and extrapolate below is Yes it will extrapolate downwards from the lowest two raw values If extrapolate below is No it will set the scaled value to MISSING Page 46 Version 2 0 rev 3 PicoLog user manual Scaled value Extrapolation nc Calibration point b Interpolation Raw value The raw and scaled values are used to convert the raw channel value from ADC counts into a real world parameter value The computer selects the raw values immediately above and below the raw value which must be scaled then uses linear interpolation between the two corresponding scaled values to estimate the parameter value You can specify up to 10 raw scaled value pairs Note next time you edit the values the entries will have been sorted into increasing raw value order The raw and scaled values can either be calculated from details supplied with the sensor or can be determined empirically by measuring a range of parameter values and noting the corresponding raw values Note the raw value will change if you change the resolution for a channel Version 2 0 rev 3 Page 47 PicoLog user manual You can check whether your lookup table looks sensible by pressing F3 to display a graph of raw vs scaled values or F4 to print the same graph 8 8 3 Equation scaling 44444444U EDIT EQUATION SCALING
24. correct 3 press Esc to return to the main menu 3 6 3 Collecting data 1 Select Collect Data new or repeat run the Collect menu appears 2 Select Define new run the DEFINE NEW RUN form appears 3 Type in a filename of TEST1 4 Press F10 to accept the filename The EDIT SAMPLING RATE form appears 5 Set sampling interval to 1 and units to minutes this will take one sample every minute If the maximum time to discharge the battery will be 8 hours set the maximum number of samples to 480 8 hours 60 minutes 6 Press F10 to accept the sampling details The EDIT CHANNEL form appears 7 Set the Channel name to Battery Voltage and change the Measurement mode to DC Volts leave other fields as they are 8 Press F10 the computer returns to the Collect menu Version 2 0 rev 3 Page 9 PicoLog user manual 9 Select Start collecting the computer will say press any key to start 10 Press a key again the computer goes back to the data collection menu The number of samples in the top right window will increase once per minute 3 6 4 Monitoring during the run If you wish to see what data you are recording you must first define a report You can do this whilst the computer is still collecting 1 Select Add or edit report the EDIT REPORTS menu appears This shows any reports that you have already defined and the option NEW 2 Select NEW because we wish to create a new report the EDIT
25. d type of all of the reports suitable for display whilst data is being collected Move the highlight to the report that you wish to display and press Enter Note Monitor reports do not appear on this menu once the run is completed 8 5 Stop collecting This option is used to terminate sampling before the maximum number of samples has been collected Once you have started a run the program will not let you out of the Collect menu until you have stopped the run 8 6 Edit sampling rate 444444U EDIT SAMPLING RATE 44444444440 Sampling interval al Units Second Number of samples 500 N Action at end of run Stop B4444444444444444444444444444444444444A This option is used to set the interval between samples and the maximum number of samples to be taken To select as sample every 5 minutes set the sampling interval to 5 and the units to Minutes The sampling interval must be a whole number so if you wish to sample at half minute intervals you must specify 30 seconds rather than 0 5 minutes Page 38 Version 2 0 rev 3 PicoLog user manual The units can be milliseconds ms seconds minutes hours and days The number of samples defines the maximum number of samples to be taken during data collection you can stop sampling at any time before the maximum You must ensure that the sampling interval is greater than the total sampling time which appears at the bottom of the edit ad
26. ect the quality of graphic reports If you have one of the printers listed just select that option If not check your printer manual to see whether it is compatible with one of these types It will do no harm to experiment though you may end up with either no output or 30 pages of garbage If you get really stuck call Pico we may be able to help In addition to the standard graphics drivers supplied with PicoLog there is a disk containing additional graphics drivers for other printer types plotters and word processor graphics formats The printer port can be one of LPT1 LPT2 and File The resolution can be nigh medium or 1ow High resolution looks good in reports but it can take a very long time to print Low resolution is quicker to print and its chunky appearance works well on overhead projector slides The orientation can be Landscape Portrait Or Half portrait Landscape usually gives the best results Version 2 0 rev 3 Page 31 PicoLog user manua 6 4 Text Printer Details 44U EDIT TEXT PRINTER 444 Printer port IL jT IL Use formfeed Yes D x x ox X ox X 3 Lines per page 66 B 4444444444444444444444444 This menu option is used to specify the type of printer to be used for tabulation and other text reports The printer port can be one of LPT1 LPT2 and File Lines per page specifies how many lines will fit onto a page including any head
27. elect the Format X vs Y graph 5 Press F10 to save the EDIT X VS Y REPORT form appears Page 20 Version 2 0 rev 3 PicoLog user manua 6 Type in a Title of Power vs Flow Rate 7 Move to Notes and select Notes 1 we can use notes 1 for details of each run on the graph 8 Move to Mark points with shapes and select ves 9 Move to Join points and select No for this graph the connection between points is less important than their position on the XY graph 10 Move to the X axis Param field and select Flow rate 11 Move to the X axis Min and Max and type in 0 and 50 respectively this gives a range of 0 to 50 degrees C on the X axis 12 Move to the Y axis Param field and select Power 13 Move to the Y axis Min and Max and type in 0 and 5000 This gives a range of 0 to 5000 watts on the axis 14 Press F10 to save these details and return to the Collect menu 3 7 9 Notes To enter some notes for the first run 1 Select Edit notes on the collect menu this takes you to the EDIT NOTES form 2 Move to the first line of notes 1 and type in burner type Egremont AZ35 3 Move to the second line of notes 1 and type in Fuel MAXOIL 230 4 Press F10 to save these details Version 2 0 rev 3 Page 21 PicoLog user manual 3 7 10 Collecting the data 1 Select Start recording on the Collect menu the computer says Press any key to start 2 press a key The computer starts recording and returns to the Collect m
28. enu You can see the sample number at the top of the screen increase once per second 3 Select Display report 4 Select either Spreadsheet or Power graph the computer will display the report you requested and will update the report every time a new sample is taken 5 Press Esc to exit from the report and return to the collect menu Once the full five minutes has elapsed the computer will stop collecting data 3 7 11 Spreadsheet files Once the run is completed you can write the spreadsheet to disk 1 Press Esc to return to the main menu 2 Select Generate reports old run 3 Select Write text report to disk the computer displays the DISK REPORT menu 4 There is only one report that can be written to disk select Spreadsheet Page 22 Version 2 0 rev 3 PicoLog user manua 3 7 12 Repeating the run Once you have entered the details for a run it is very easy to repeat the run 1 Press Esc to return to the Main menu 2 Select Collect data new or repeat run 3 Select Repeat current run the computer asks for a filename for the new run it offers the old filename plus one BOILER1 1 BOILER2 as a default Note if you have just completed a run PicoLog will assume that you wish to repeat the same run If however you exit from PicoLog between runs the computer will ask you which run you wish to repeat at this point 5 Press F10 to save this filename 6 Select Edit n
29. ept these details the computer displays the Edit channel menu Note the entry for channel 1 in the channel menu now says Inlet Thermistor You can select this option again at any time to change the details for this channel 5 Select Channel 2 6 Set the channel name to Outlet thermistor 7 Set the measurement mode to ADC counts 8 Set the number of readings to 100 the outlet temperature could vary a lot as the heated water will be at various different temperatures so it makes sense to take lots of readings and then average them 9 Press F10 to accept these details and return to the Edit channel menu 10 Select Channel 3 11 Set the Channel name to F1ow meter 12 Set the measurement mode to Frequency the flow meter generates pulses whose speed depends on the flow rate The frequency measurement is effectively an average so only one reading will be enough Version 2 0 rev 3 Page 15 PicoLog user manual 13 Press F10 to return to the Edit channel menu 13 Press Escape to return to the Collect menu 3 7 4 Thermistor Scaling We now need to define some parameters to convert the ADC readings into real world values degrees C litres per second et cetera 1 Select Add or edit parameters the Edit parameters menu appears 2 Select NEW the EDIT PARAMETER form appears 3 Setthe Name to Inlet temperature A Set Heading lines 1 and 2 to Inlet and Temp 5 Set Units to degc Note the degre
30. er and footer Use Formfeed specifies whether the printer can move to the start of a new page automatically when it is sent a Form Feed character If yes the lines per page can be any number up to the real lines per page If no you must set lines per page exactly to make the text fit on the page 6 5 Data and backup paths 4444444444U EDIT PATHS W44444444 Data path BEN Backup path A N B44444444444444444444444444444444 gt x x This option enables you to specify the default directory for data files and the path to use for backups The data path is used when you use the Load old run from disk and Display or print index option on the File management menu If you ask to load the file for an old run the program starts by displaying this Page 32 Version 2 0 rev 3 PicoLog user manual directory but it also offers the option to change to other directories or drives The backup path is used when you select the Copy all runs to backup path option on the File management menu this option copies all run files in the data path to the backup path Version 2 0 rev 3 Page 33 PicoLog user manual 7 Display voltages This option is useful to check that your system is connected up correctly before starting a run It produces a continuous display of each of the values that you can measure with the type of ADC that you have specified in the setup For example for an ADC 10 the display looks like
31. es symbol t appears on the screen but may not appear on all printers deg will be printed on all printers 6 Set the Scaling method to Table lookup 7 Press F10 the EDIT TABLE LOOKUP SCALING form appears 8 Set Channel to Inlet thermistor 9 We now need to do some sums The thermistor input is a 30k ohm Betacurve device connected in series with a 30k resistor to 2 5V The voltage input to the ADC 11 is 2 5 Rt Rt 30k The following table shows the resistance of the Betacurve resistor at temperatures from 0 to C and the resulting ADC values and enter the values from columns 4 and 1 into the form as raw and scaled values Page 16 Version 2 0 rev 3 PicoLog user manual Temperature Resistance ADC counts degrees C form V 1023 2 5 SCALED datasheet RAW 10 Press F10 to save the table lookup values and return to the Collect data menu 11 Select the Add or edit parameters menu option 12 Select the NEW menu option 13 Set the name to Outlet temperature 14 Set Heading lines 1 and 2 to Outlet and Temp 15 Set the units to aeg C 16 Set the Scaling method to Table lookup 17 Press F10 to save the details and go to the EDIT TABLE LOOKUP SCALING form Version 2 0 rev 3 Page 17 PicoLog user manual 18 Set the Channel to Outlet thermistor 19 Set the raw and scaled values to the same values as for the inlet temperature 20 Press F10 to save the scaling information and return to the Collect data
32. eters and reports and to display or print reports The File management menu enables you to read in an old run to copy or delete existing runs and to produce an index of the files in a directory The Exit from program option is used to exit from the program and return to DOS Version 2 0 rev 3 Page 27 PicoLog user manual Page 28 Version 2 0 rev 3 PicoLog user manua 6 Setup menu The setup menu is usually used only when you are installing the system It enables you to define the hardware and software configuration for the logger program 4444444444U SETUP MENU W44444444444Q Graphics screen mono colour Interface details ADC type port Graphics Printer details 7 Text Printer details B A Data and backup paths 44444444444444444444444444444444444 6 1 Graphics screen 4444U EDIT SCREEN SETUP W4444Q Graphics display Colour S B44444444444444444444444444444A This option enables you to specify how graphs will appear on your screen If you have a colour display select colour if you have a monochrome display try both of the black on white and white on black options then decide which looks best on your computer Note that PicoLog uses CGA screens in two colour mode black and white to get maximum resolution This also affects the use of colour on text displays No harm will come from using the wrong type but some menus or graphic symbols may
33. etting up the system 1 Select Setup display ADC printer paths The setup menu appears Version 2 0 rev 3 Page 7 PicoLog user manual 2 To use a colour display select the Graphics Screen mono colour option 3 Press the space bar change the screen type from Black and White to Colour 4 Press F10 to accept this change Note this will not take effect until you next run the program If you want to start using colour immediately Press Esc twice to exit from the program type in picolog again and then repeat steps 1 and 2 5 Select Interface details ADC type port the SELECT ADC form appears 6 Press the space bar until ADC 12 appears 7 Press F10 to accept this change The EDIT SETUP form appears 8 Press the space bar until the required printer port name appears 9 Press F10 to accept this printer port the Setup menu appears Note There are three more options on the setup menu If you do not need printed reports and all of your data files will be in the current directory it is not necessary to use these options We will ignore them for the purposes of this example Page 8 Version 2 0 rev 3 PicoLog user manual 3 6 2 Checking the ADC 1 Press Esc to return to the main menu 2 Select Display Voltages the DISPLAY VOLTAGES form appears if you have set up the interface correctly the computer will display the ADC value and voltage Connect your battery and check that the voltage reading is
34. ge 13 PicoLog user manual First we wish to check that the sensors are working correctly 1 From the Main menu select Display voltages option the computer displays the ADC counts and voltages for each of the channels on the ADC 11 Channel 1 changes when we increase the inlet temperature Channel 2 changes when the outlet temperature changes and the frequency of Channel 3 changes when the pump is turned on See section 3 7 4 for how to check that the values are accurate 2 Press Escape to return to the main menu 3 7 2 Sampling details 1 Select Collect data new or repeat run the computer displays the Collect menu 2 Select Define new run The computer displays the DEFINE NEW RUN form 3 Type in a Filename of BOILER Note when we repeat this run for subsequent tests the computer will automatically increment the filename BOILER2 BOILER et cetera 4 Press F10 to accept the filename the computer displays the EDIT SAMPLING RATE form 5 Set the sampling interval to 1 6 Set the units to seconds 7 Set the number of samples to 300 300 seconds is 5 minutes Page 14 Version 2 0 rev 3 PicoLog user manual 8 Press F10 to accept the computer now displays the Edit channel menu 3 7 3 Specifying the channels 1 Select Channel 1 the computer displays the Edit channel form 2 Set the Channel name to Inlet Thermistor 3 Set the measurement mode to ADC counts 4 Press F10 to acc
35. i audiui uda de haves boa ee bo 22 Collecting the data 2222000055 22 Spreadsheet files 02002 00000 23 Repeating the run 2 00 0c ee eee 23 4 Running the program lt srevanesbeavanehene vaca heaven oe 25 ca ec rr 25 PONS hii Au sete bicis see Mv Sea een Sata bd 26 Graphic Reports uad dee S eoo Er el Bir ahis 27 Version 2 0 rev 3 Pagei PicoLog user manual 5a MENU ss se seramista She uice P uy Reano m oE ese Eig 28 6 Setup MENU sx ne oe ae Ge One eye Utt pii des 30 Graphics screen ase pepe eue bobbi wks spe ERE 30 Interface Options rei a une ncn B acute EEEE n B deos enn 31 Graphics Printer details 0 00 00 cece eee eee 32 Text Printer DetailS 4 20320 ERE es eee ees 33 Data and backup paths 0000 keen eee 33 7 Display voltages 24 oda et ou oe ute oor a os 35 8 Data collection menu Lll 36 Define NEW TUN Loh acne Er aun ae ack OE EVERE EREKE 37 Repeat existing run llle 37 Start collecting 6e dire bake Eu dE EAE wes 38 Display report uc scene Sie edere wie ate reote tente tete 39 Stop collecting amp seu iuo eredi ed red seed sg e 39 Edit sampling rate 0 eee es 40 Add or Edit ehannels 4 etia e E vee eed vee ee 41 Add or Edit parameters 222 eee eee 44 Liri amp ar Scalllig dresses seret Bec ene que Sus aerea 46 Table lookup scaling sees 48 Equation scaling 42e eA b
36. ies in the parameter column to the parameters that you wish to appear on the report If the run is in progress or completed press F3 to display the report 8 9 3 Y vs Time Report A y vs time report is a graph of up to ten parameters against time Here is a typical example Page 52 Version 2 0 rev 3 user manual PicoLog humidity and temperature IM TURIS ng w et Run DAPICOLOGGERIDEMGARAGE 10 collected 18 37 on 12Jun93 Page 53 Version 2 0 rev 3 PicoLog user manual 44444444444U EDIT Y VS TIME REPORT W444444444444444Q Title Enp rane eE li Notes None One sample every 1 Format Linear Min x t Max x 5000 ij Left axis Right axis Enabled Yes yes t Label Temp DSL iE dE R Units eleg eleg t Min y 5 10 Max y 30 10 i Parameter Axis Parameter Axis 3 Air temperature Left none LSE T Wesen INO none eit Temp difference Right none Left 7 lt none gt Left lt none gt LSE 5 lt none gt Left lt none gt LOE B444444444444444444444444444444444444444444444444444A This report enables you to plot a graph of up to ten parameters against time You can attach a y axis to the left side the right side or both Both is useful if you have two parameters with different units or with the same units but significantly different magnitudes The title and notes will appear at the top of the graph The
37. ings to temperatures and then to define text or graphical reports to display this data while you are collecting data Use the Add or edit Parameter and Add or edit Report options Next select Start collecting If you selected a sample interval less than 50ms the computer will just display a message saying collecting until all samples have been taken For lower sampling rates the computer will display the collecting menu so that you can display reports or modify parameters and reports whilst you are collecting data For sampling rates faster than one per second changing the reports and parameters whilst collecting may interfere with data collection If you wish to terminate the run before the computer has collected the maximum number of samples select the Stop collecting option The computer will not let you out of this menu until you have stopped collecting 3 4 Repeating a run Once you have successfully carried out a run it is very easy to repeat the run with the same parameters and reports If you exited from the program since you collected the data you must first read in the run that you wish to repeat using the Load old run from disk option on the File management menu Once you have loaded the run that you wish to repeat all of the functions that you require are on the Collect menu Next select Repeat existing run and specify a new filename for the run Once you have done this you can either start collecting with exactly
38. ion is used to specify the filename for a new run The default path for the file is the one specified using the setup menu but you can enter a different path if you wish If you enter a filename that already exists the program will ask you to confirm that you wish to overwrite the existing file 4444U DEFINE NEW RUN W4444 This option clears all channel sample parameter and run information so that you can start completely from scratch in defining the details for a new run When you press F10 it goes straight to the Edit sampling rate option and then on to the Add or Edit channels option Once you have specified a filename the computer automatically saves the run file every time you make a change to it 8 2 Repeat existing run 444444U REPEAT RUN W444444 Filename RUN25 Q Directory C LOGDATA B44444444444444444444444444A This option is used to repeat an existing run The computer will assume that you wish to repeat the run that is currently loaded if you wish to repeat a run that you did some time ago use the Load old run option on the File Management menu Page 36 Version 2 0 rev 3 PicoLog user manual When you select this option the computer offers the current run filename with a number at the end incremented for example TEST1 becomes TEST2 You can change to a different name if you wish If you enter a filename that already exists the program will ask you
39. llowing form 4444444U COPY RUN TOW444444Q x Directory QAO EDLY Filename RUN25 x x B444444444444444444444444444A Type in the new filename and directory then press F10 The computer will copy the file to the new directory and file 10 5 Backup all runs When you select this option the computer will copy all files from the data directory to the backup directory On completion it will display a report showing the status of each copy Version 2 0 rev 3 Page 63 PicoLog user manua 10 6 Extract records B444444444444444444444444444 4444U EXTRACT RECORDSW44444 Directory C LOGDATA Filename RUN25 First sample i Last sample 2230 i A This menu option is used to extract a range of samples from a file and to create a new file containing the samples This is useful if you have collected several thousand samples in order to catch an event but you wish to save only a couple of hundred points around the event When you select this option the computer displays a form to ask for the details that you wish to extract The filename first sample and last sample contain the details for the current file You should change the filename to name of the file that you wish to create for example RUN25A in this case Next you should enter the sample number of the first and last sample that you wish to copy Once you have entered these details press F10 to start the copy Page
40. mp Speed degC degC km h RH 12Jun93 18 42 16 2 18 0 1492 3890 12Jun93 18 47 16 3 18 5 1400 3193 12Jun93 18 52 16 3 18 1 1431 3113 12Jun93 18 57 16 3 17 8 1883 3080 Version 2 0 rev 3 Page 51 PicoLog user manual The title will appear on each page of the tabulation report as will the heading details for each of the parameters that you select The notes option can be either None Notes 1 or Notes 2 This specifies whether any of the notes for this run are to appear in the heading This is useful if you carry out a number of similar runs the report title can be the same for every run but the notes contain information specific to each run First sample and Last sample specify the range of samples that you wish to appear in the report One sample every is useful if you have a lot of samples you can generate a report which contains only one sample every 10 Max columns specifies how wide the report is to be it only has any effect if you specify right or centre justify Justify affects the positions of the columns for each parameter across the page It can be one of left display the parameters at the left hand side of the page centre put the parameters in the middle of the page right spread the columns evenly across the page The timestamp provides a facility to display the time and or date at which a sample was taken at the start of each line It can be None Date Tim OrDate and time Set one or more entr
41. n 3 45 50 linear 3 45 46 lookup 48 table lookup 3 setup sss 30 spreadsheet 53 text printer 33 thermistor 16 timestamp 54 57 UNITS ume ds 43 44 VOllS 22 whew dea Beaten oS 42 word processor 32 Page 65
42. n the thermocouple registers 3 degrees C when immersed in ice it needs an offset of 3 degrees The offset is therefore 3 and the slope is 0 2444 The maximum and minimum ADC values are as follows Note bear in mind that Pico ADCs are typically 196 accuracy see spec for more details Min Max ADC Range voltage voltage 0 255 0 1023 0 4095 8 bit 255 255 9 bit 511 511 10 bit 1023 1023 11bit 2047 2047 12 bit 4095 4095 13 bit 8191 8191 14 bit 16383 16383 1 5bit 32767 32767 16bit 65535 65535 TC 08 ma Version 2 0 rev 3 Page 45 PicoLog user manual 8 8 2 Table lookup scaling 444U EDIT TABLE LOOKUP SCALING W4444 Parameter Air temperature Channel Thermistor I Extrapolate below Yes d Extrapolate above Yes i Raw value Scaled value t 115271 60 s x 2204 55 r 3645 45 j 5870 30 B444444444444444444444444444444444444A Table lookup scaling is a way of converting a channel value in ADC counts into a parameter value in engineering units It works even if the relationship between raw and scaled values is not linear for example with thermocouples Before using this menu option you need to have measured or calculated the raw values corresponding to a set of scaled values covering the range that you wish to measure The channel is used to select the channel that is used to calculate this parameter Extrapolate above below spe
43. ne none none none Min alarm Max alarm i Q 0 80 x A 444444444444444444444444444444444444444 During data collection a monitor report can be used to display the current values of up to 8 parameters and to sound an alarm if any parameter goes out of limits Set one or more entries in the parameter column to the parameters that you wish to monitor To set an alarm threshold enter a value in the corresponding min or max column Page 50 Version 2 0 rev 3 PicoLog user manua 8 9 2 Tabulation report 4444444444U EDIT TABULATION REPORT W4444444444 Title Summary of temperatures Notes None First Sample Jl Max columns 80 Last Sample 65000 Justify Left One sample every 1 Timestamp None Parameter Sample no AE o cenpoerature B Q Water temperatur none i lt none gt i none i lt none gt none A 4444444444444444444444444444444444444444444444 A tabulation report can be used to provide a hardcopy listing of the measurements for a run or to display the numerical results during the run If you write a tabulation report to a disk file you can then read it into a spreadsheet for further analysis A typical report looks like this Weather report Cromarty 12Jun93 Date Time Indoor Outdoor Wind Humidity Temp Te
44. ompleted Move the highlight to the report that you wish to display and press Enter Note Monitor reports do not appear on this menu once the run is completed If you display a graphical report you can alter the scale of the graph and select which portion is displayed press F1 for help while the graph is displayed See section 4 3 for a description of this function 9 5 Print report 444444U PR NT REPORT W44444444Q Eno CLEF All temps Y vs Time Graph y Tabulation X B444444444444444444444444444444A When you select this option the program gives you a menu containing the name and type of all of the reports suitable for printing Move the highlight to the report that you wish to display and press Page 60 Enter Version 2 0 rev 3 PicoLog user manual 9 6 Write text report to disk 444444U DISK REPORT W44444444Q All temps Tabulation B444444444444444444444444444444A This option is used to write text to a disk file so that you can import it into a word processor spreadsheet or database When you select this option the program gives you a menu containing the name and type of all text format reports Move highlight to the report that you wish to display and press Enter 9 7 Display run setup When you select this option the program displays details of all channels parameters and reports for this run You can use it to check on the setup If you press F5 the
45. otes the computer displays the EDIT NOTES form 7 Move to the first line of notes 1 and type in burner type Gloucester AP20 8 leave the second line of notes 1 still saying Fuel MAXOIL 230 9 Press F10 to save these details and return to the Collect menu 10 Select Start Collecting 11 Proceed as for the first run Version 2 0 rev 3 Page 23 PicoLog user manua 4 Running the program To run the program just type in picolog then press Enter The program will then display the main menu Selecting an option on the main menu will lead to other menus these in turn will lead to forms or graphical displays 4 1 Menus 444444444444U MAIN MENU W4444444444444Q Servo Cisisilleyw WDC jorimcSsic jocicias Display voltages Collect data new or repeat run Generate reports old run File management Exit from program B44444444444444444444444444444444444444A Each menu contains a number of options one of the options is highlighted Your can move the highlight up and down using the cursor keys or by typing in the first few letters of the option that you wish to move to When the highlight is on the option that you require press Enter To return to the previous level menu press Escape 3e c 26 3 0X Note some menus for example lists of files contain more entries than can be displayed at once you can bring another page of options into view using the PgUp or PgDn keys The
46. parameter that you wish to scale Equation can be used when it is possible to calculate the relationship between input reading and parameter value You can also use equation scaling to evaluate a parameter which is derived from one or more other parameters for example to calculate shear modulus from stress and strain On pressing F10 the computer will present a form which asks for further details for the selected scaling method 8 8 1 Linear scaling 4444444U EDIT LINEAR SCALING W444444444 Scaled parameter Air temperature Raw parameter jurbresem een MR a Offset 127 s 50 x Slope 3556 per 1sb B444444444444444444444444444444444444444A Linear scaling is the simplest way of converting a channel value the raw parameter into engineering units the scaled value The raw parameter specifies the input parameter usually a channel that is used to calculate this parameter Note don t forget to set the raw parameter The slope and offset is used to convert raw parameter into a scaled parameter value using the formula scaled offset slope raw Page 44 Version 2 0 rev 3 PicoLog user manual If for example you use a thermocouple amplifier which outputs the temperature in degrees C at 10mV per degree C with an ADC 11 the calculation is as follows The ADC 11 outputs an ADC value of 1023 at 2 5 volts 2500mV so the slope is 2500 10 1023 0 2444 If for some reaso
47. red by the Pico range of data acquisition products To use PicoLog you will need an IBM compatible PC and a Pico analog to digital converter If you wish to print reports you will also need an HP Deskjet or Laserjet printer or an Epson FX or LQ printer This manual starts off with an overview of the functions provided by PicoLog then it explains how to set up a couple of typical data collection runs Finally there is a detailed description of each of the menus and forms in PicoLog The content of some forms depends upon the type of ADC see the manual for your ADC for a detailed description of the special features of PicoLog for your ADC We have tried to use the following typographical conventions throughout the manual Bold text is used for terms which have some special meaning within the manual when they first appear and for menu and field names has one or more channels C the Setup menu Courier text is used to indicate user input and also menu options for example enter a filename of TEST1 select the Display Voltages option from the Version 2 0 rev 3 Page 1 PicoLog user manual 2 Basic principles The PicoLog data logger collects sets of measurements from the channels of an analog to digital converter ADC and stores them on disk It also provides tools to convert the ADC values to give parameters scaled in engineering units and to produce text and graphical reports Ej
48. t axis units field and enter volts 7 Set min Y to 0 and max Y to the nearest whole number above the starting battery voltage say 4 8 Move down to the first parameter field and press the space bar until the parameter name is Battery voltage 9 Press F10 to save the details the Collect menu appears 10 Select Display report the computer displays a graph of battery voltage against time Version 2 0 rev 3 Page 11 PicoLog user manual Page 12 Version 2 0 rev 3 PicoLog user manual 3 7 A more complex example We shall now work through a complete example which demonstrates most of the functions of PicoLog Suppose that you wish to carry out a number of experiments to determine the efficiency of a boiler using various different fuels and burners The boiler has two thermistors attached one to measure the inlet temperature and one to measure the outlet temperature It also has a flow rate sensor which reports the amount of water flowing through the boiler All three sensors are connected to an ADC 11 Each experiment will last five minutes in the course of which the pump will be manually adjusted to run at five different rates for about a minute each Here is a diagram showing the setup Inlet gt Scale Inlet Thermistor Temperature Outlet ra Outlet Thermistor Scale Temperature Flow Sensor gt Scale gt Hoh y Power 3 7 1 Checking the ADC Version 2 0 rev 3 Pa
49. t mode ADC counts occupies less space on disk if you are collecting a lot of data is worth while using this measurement mode then defining a parameter to convert it to a scaled value When a channel value is used as a parameter the units are set automatically according to the measurement mode The number of readings specifies how many readings will be taken for each sample The combination method defines how the readings will be combined to form a sample It can be minimum maximum Or average Average is useful to reduce the effects of noise Minimum and Maximum can be used to identify extreme values during the sample interval The total sampling time is the total time required to collect the readings for all channels It must be less than the sample interval Note previous versions of Picolog had a sensor minimum maximum option This option was not very useful and has been removed 8 8 Add or Edit parameters 4U EDIT PARAMETERS W44Q NEW Air temperature x Water temperature X B4444444444444444444444A This menu enables you define new parameters and edit existing parameters A parameter is a value calculated from one or more other parameters or channels it is normally used as a way of scaling a channel Page 42 Version 2 0 rev 3 PicoLog user manual value in ADC counts volts or Hz to give a parameter value in engineering units for example degrees C volts or kilowatts Note channel
50. the field You can move between fields using the mouse the cursor keys Tab Home and End To save the details you have entered in a field press F10 to exit without saving press Escape There are three types of field text numeric and pick With a text field you can type in any characters that you like The backspace key deletes the character before the cursor and the delete key deletes the character at the cursor For a numeric field you must enter a valid number The computer will not let you move to another field or exit until all numeric fields contain valid numbers Pick fields are used when there is only a small number of values you could enter like a menu but you can only see one option at once Press space to move to the next option minus to move to the previous option and a Version 2 0 rev 3 Page 25 PicoLog user manua few letters to move to the next option beginning with those letters You can press F2 for a menu showing all possible values for a pickfield 4 3 Graphic Reports If you display a graphical report after a run has completed you can alter the scale move about the display using the cursor keys and print the view that you have selected To find out what you can do press F1 the computer will display a list of options like this 444444444444444444444444444444Q Press cursor key or letter Keys Action Home Automatic Scale A Ke Pan Left earlier H Pan half left gt R Pan
51. to confirm that you wish to overwrite the existing file This option clears the samples for the existing run but retains all channel parameter and report information 8 3 Start collecting This option is used to collect data Before using this option you must have entered the following details run filename sampling rate channels If all of the details have been entered the computer will display the following window 44444U COLLECT DATA W44444Q Press any key to start B44444444444444444444444444A When you are ready to start recording press a key If the sampling rate is too fast to update reports at the same time it will say too fast for reports and the collect data window will remain in place until all data has been collected If the sampling rate is slow it will return to the collect data menu you can then edit and display reports whilst data is collected The number of samples will appear in the window at the top right of the screen and will be updated unless a report is active To stop the run before all samples have been taken select the Stop collecting option on the Collect data menu 8 4 Display report Version 2 0 rev 3 Page 37 PicoLog user manua 444444U DISPLAY REPORT W44444444Q emp eG asia Y vs Time Graph All temps Tabulation x Alarms Monitor X B44444444444444444444444444444444A When you select this option the program gives you a menu containing the name an
52. uate the temperature difference Note you can also add the values from a channel directly onto a report if the values are already scaled correctly There are also a number of special parameters sample number time since start of run etc which are generated automatically by the program A report is a text or graphical representation of the data for a run Text reports can be displayed printed or written to disk graphic reports can be displayed or printed Graphical report Text report inane Indoor Outdoor Wind Humidity Temp Temp Speed degC degC km h RH 16 2 18 0 1492 3890 16 3 18 5 1400 3193 16 3 18 1 1431 3113 1623 17 8 1883 3080 16 2 17 6 1439 3044 16 2 17 6 1254 2988 Before during or after collection of data you can define a number of parameters and reports During recording you can display a report to Version 2 0 rev 3 Page 3 PicoLog user manual monitor what is happening once the run is complete you can print out reports and output text reports to a disk file Each repeat run will be stored in a separate file The run file contains all details about the run this includes channels sampling details data values parameters and reports You can read in a run file at a later date then display or print existing reports and new parameters reports or notes You can also repeat the run to obtain another set of data then generate the same reports as for the first run Page 4 Version 2 0 rev 3
53. umber of litres per second and 4 192 is the number of kiloWatt seconds required to heat a litre of water by one degree C 12 Press F10 to save the scaling information and return to the Collect menu 3 7 7 Tabulation report We are now ready to define some reports We require a tabulation report to output the data to a spreadsheet and a graph of power versus flow rate Version 2 0 rev 3 Page 19 PicoLog user manual to show how well the boiler works at each flow rate Either report can be used to monitor progress whilst the experiment is running 1 Select Add or edit report form the Collect menu the EDIT REPORT menu appears 2 Select NEW the EDIT REPORT form appears 3 Type in a name of Spreadsheet just to remind your self what the report is for when you see it on menus 4 Select the Format Tabulation report 5 Press F10 to save these details the EDIT TABULATION REPORT form appears 6 There are two columns of fields below the line that says Parameter Move the cursor to the first Parameter field then select Flow rate 7 Move to the next Parameter field and select Power 8 Press F10 to save the details and return to the Collect Menu 3 7 8 X vs Y graph 1 Select Add or edit report form the Collect menu the EDIT REPORT menu appears 2 Select NEW the EDIT REPORT form appears 3 Type in a name of Spreadsheet just to remind your self what the report is for when you see it on menus 4 S
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