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TiePie Handyprobe HP2 User Manual

Multifunctional pc measuring instrument
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User manual
Handyprobe HP2
a multifunctional
PC measuring instrument
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TiePie

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Summary of Contents for TiePie Handyprobe HP2

  • Page 1 User manual Handyprobe HP2 a multifunctional PC measuring instrument engineering TiePie...
  • Page 2 ATTENTION! Measuring directly on the LINE VOLTAGE can be very dang- erous. The crocodile clip of the Handyprobe HP2 is connected with the GROUND of the computer. Use a good isolation transformer or a differential probe when measuring at the LINE VOLTAGE or at GROUNDED POWER...
  • Page 3 User manual Handyprobe HP2 a multifunctional PC measuring instrument TiePie engineering...
  • Page 5 Contents Safety ..........5 Declaration of confirmity .
  • Page 6 Printing measured data ....... . . 29 Choosing an instrument ....... . 29 Terminating the program .
  • Page 7 Starting a spectrum measurement ......53 Measuring a harmonic distortion ......53 Calculate the spectrum from the HOLD signal .
  • Page 8 - Oscilloscope ........70 - Spectrum analyzer .
  • Page 9 Safety Before you start working with the Handyprobe HP2, first read these safety rules. Avoid working alone. Take care when measuring at voltages higher than 25V AC or 60 V Measuring directly on the LINE VOLTAGE can be very dangerous.
  • Page 11 EC declaration of Confirmity Wij verklaren geheel onder eigen verantwoordelijkheid, dat We declare, on our own responsibility, that the product het produkt Handyprobe HP2 Handyprobe HP2 for which this declaration is valid, is in compliance with waarop deze verklaring betrekking heeft, in overeenstemming...
  • Page 12 Identification af apparat: jota tämä selvitys koskee, on huväksytty Kategori: Måleinstrument Model/type: Handyprobe HP2 EN55011, EN55022, EN50081-1 ja EN50082-1 Standarder der er anvendt som grundlag for erklæring, eller EMC standardien 89/336/EEG, ja lisästandardien 92/31/EEC henvisning til den prøvningsrapport, der er udstedt af et be-...
  • Page 13 The Handyprobe HP2 is a one channel, 8 bits, 1 - 20 Msamples/sec mea- suring instrument. With the acompanying software the Handyprobe HP2 can be used as an oscilloscope, a storage oscilloscope, a spectrum analy- zer, a true RMS voltmeter or a transient recorder.
  • Page 14 In the latter illustration a sine wave signal is sampled with 50 samples. By connecting the adjacent samples, the original signal can be reconstructed. See also the next illustration. The more samples are taken, the better the signal can be reconstructed. The sampling frequency must be higher than 2 times the highest frequency in the input signal.
  • Page 15 most in the illustration). The signal is sampled at a frequency of 1 kHz. The dotted signal is the result of the reconstruction. From that triangular signal the periodical time is 4 ms, which corresponds with an apparent frequency (alias) of 250 Hz (1.25 kHz - 1 kHz). To avoid aliasing, the sample frequency must be higher than 2 times the maximum frequency of the input signal.
  • Page 16 With the oscilloscope time dependent electrical signals can be examined easily. The Handyprobe HP2 is equipped with two types of oscilloscopes, LIVE and HOLD. The oscilloscope LIVE measures 1000 samples, 2 page. The oscilloscope HOLD measures 15000 samples, 30 pages.
  • Page 17 (AM or FM). The Handyprobe HP2 is equipped with a spectrum analyzer. The spec- trum analyzer takes 1024 samples, of which a spectrum of 512 spectral components is calculated by means of FFT.
  • Page 18 sure with. The voltmeter measures the size of the input signal and displays the values using a large 7 segment display. The voltmeter can measure the input signal in several ways: TRUE RMS the true RMS value is measured PEAK PEAK the peak peak value is measured MEAN the mean value is measured the maximum value is measured...
  • Page 19 MOMENTAL the momentary value of the input signal is measured TRUE RMS the true RMS value of the input signal is measured MEAN the mean value of the input signal is measured the maximum value of the input signal is measured the minimum value of the input signal is measured Introduction...
  • Page 20 Chapter 1...
  • Page 21 The Handyprobe HP2 is an external measuring instrument which can be connected to a PC. The Handyprobe HP2 is connected to the parallel printer port of the PC using the attached cable. Do not connect the Handyprobe HP2 to any other port at the PC Note than the Centronics parallel port.
  • Page 22 Chapter 2...
  • Page 23 Software Installation of the software The software of the Handyprobe HP2 is shipped on one diskette. First you have to make a backup of the original diskette. Refer to your DOS manual for making a backup of a diskette. When you have made the backup, store the original diskette in a safe place and use the backup.
  • Page 24 menu SETTINGS, in the lower right corner of the screen. Structure of the program The program contains five integrated measuring instruments: An oscilloscope device: LIVE A storage oscilloscope device: HOLD A spectrum analyzer device: SPECTRUM A true RMS voltmeter device: VOLT A transient recorder device: TRANS Only one measuring instrument can be active at the same time.
  • Page 25 Example: HP2 trans b:HP.set means the measuring instrument transient recorder is activated with the file settings b:HP.set. Incorrect instrument or filenames will be ignored. The parameters par1 and par2 may be exchanged sequentially, but have to be separated by a space. Controlling the program After starting the program, first an intro screen with program information is displayed.
  • Page 26 places the cursor one row up places the cursor one row down places the cursor one column to the left places the cursor one column to the right activates the selected choice displays a list of instruments Depending on the choice, after activating, a popup menu appears or the text in the menu changes, as well as the instrument setting.
  • Page 27 Help screens The program contains integrated help screens. The screens can be invo- ked at several places in the program, by pressing function key <F1>. The invoked help screen gives information about controlling the active program part or information about the active program part. Program settings Several parts of the program are configurable.
  • Page 28 MISCELLANEOUS Through this choice, three choices are available: ADVANCED MENU to return to the normal main menu SAVE SETTINGS to save the current instrument settings to disk QUIT PROGRAM to quit the program Saving instrument settings If you often use the same settings for an instrument, you can save the setup on disk.
  • Page 29 Then activate the choice SAVE from the SETTINGS menu. A dialog box appears, in which the filename for the settings file can be entered. The filename will automatically get an extension .SET. If you have entered the filename, the file with the instrument setup is saved on disk. To make an instrument setting which will be used as a 'quit program' from SELECT SETTINGS (menu SETTINGS from the advance main menu) or MEASUREMENT TYPE (simple menu) any instrument setup will do, but...
  • Page 30 Setting the location of files With the choice DEFAULT DIRECTORY the default directories for the Handyprobe HP2, the print files and the data files can be set. The default directory for the Handyprobe HP2 is the directory containing the files HP2.EXE, HP2_ENG.HLP, HP2_ENG.INF and HP2.FNT.
  • Page 31 Setting the printer type With the SET PRINTER TYPE choice you can choose between an EPSON compatible matrix printer or an HP-LASER compatible printer. This setting is used for printing out data. Setting the date format The program uses date indications at several places, like at printer output or on the screen of the transient recorder.
  • Page 32 existing file. If there is insufficient disk space an error message appears. A file with the extension "DAT" and a file with the extension "GEG" are made during a WRITE DISK. The data format is determined by SET FILE TYPE. The voltmeter has a completely different way of storing measure- Note ment data.
  • Page 33 Printing measured data There are two ways to print the measurement data. The first way is pressing <Shift-PrtSc>. A quarter page size screen dump is made, containing only the information that is found on the display. The second way is activated by the menu choice PRINT. A popup menu appears, displaying 2 choices.
  • Page 34 oscilloscope LIVE storage oscilloscope HOLD spectrum analyzer SPECTRUM voltmeter VOLT transient recorder TRANS This menu can also be activated by means of the <Esc> key or the right mouse button (if no other menu is active). Terminating the program The popup menu DEVICE can be invoked from all program sections by means of the <Esc>...
  • Page 35 An oscilloscope is a measuring instrument which displays the changes of a voltage in the time domain. The Handyprobe HP2 is equipped with an oscilloscope with a fully confi- gurable input (channel). It is a digital sampling oscilloscope. That means that the oscilloscope takes samples at fixed times.
  • Page 36 For more information, see the chapter Spectrum Analyzer Setting up the channel The channel of the Handyprobe HP2 oscilloscope is completely configura- ble. With the choice CH SET from the main menu a popup menu is called.
  • Page 37 Setting the signal coupling By activating the choice COUPLING AC/DC , the text changes from COUPLING AC to COUPLING DC or vice versa. In the hardware, a capacitor is switched into (AC) or out of (DC) the signal path. In COUPLING DC the complete signal (AC+DC) at the input is passed through.
  • Page 38 The arrow indicates the offset, the 0 volt level . The offset can be set as follows: To change the offset, first remove all popup menus Note Move the offset level up Move the offset level down Move the offset level to the center Select the next offset or trigger level Select the previous offset or trigger level Move the offset level to the top...
  • Page 39 The unit of measure is then Volt and the numbers along the axis corres- pond with the size of the input signal. The Handyprobe HP2 oscilloscope allows you to create another definition of the vertical axis. By means of the choice UNIT from the CH SET menu the units of measu- re of the vertical axis can be changed.
  • Page 40 10*0.2 sec = 2.0 sec. When a key is pressed within these 2.0 sec, the sampling process will be interrupted and the program will responds to the key press. There are 5 different Handyprobe HP2 models, they differ in the Note maximum sampling frequency. The available models are: 1MHz, 2MHz, 5MHz, 10MHz and 20MHz.
  • Page 41 0.2 sec, 0.5 sec, 1 sec/div. sec, 2 sec, 5 sec and 10 The bold printed values are not available in each Handyprobe HP2 model. Magnification of the horizontal axis By activating the TIME-MAG choice, a popup menu appears, displaying 6 software time-axis magnification areas.
  • Page 42 level, the trigger system becomes active and 'fires' a pulse. This pulse is used to start the display of the signal. The arming level and the firing level are coupled to each other by the trigger hysteresis and their level is determined by the trigger level. The firing level corresponds to the trigger level.
  • Page 43 Setting the trigger slope By activating the choice SLOPE+ / SLOPE-, the text in the menu choice changes from SLOPE+ to SLOPE- or vice versa. In the SLOPE+ position triggering takes place on a rising slope of the signal to be measured and in the SLOPE- position on a falling slope. Adjusting the trigger level The adjustment of the trigger level is not done by means of a popup menu.
  • Page 44 the correct position. Drag: press the left mouse button and keep it pres- sed, while moving the mouse. When the arrow is at the correct position, release the mouse button. The mouse cursor will disappear while dragging the arrow and appear again when the button is released. Setting the trigger time-out When the input signal does not meet the trigger conditions, no new mea- surement data will be displayed and the last displayed signal will remain on...
  • Page 45 ONE SHOT to MEASURE. After measuring the signal the text changes back to ONE SHOT. When a key is pressed during measuring (MEASU- RE), the sampling process will be terminated immediately. Samples taken up to the moment the key is pressed can be viewed (the remaining sam- ples are 0).
  • Page 46 Mirror the crosshair on the relative y-axis Decrease the step size twice Increase the step size twice Switching between crosshair controll and offset/ trig- ger level controll. Absolute zero is that point at the screen where voltage and time are zero (left most, in the center of the screen).
  • Page 47 Chapter 5 Storage oscilloscope (device: HOLD) Differences with the oscilloscope The storage oscilloscope HOLD is quite similar to the oscilloscope LIVE. there are a few differences, which will be described here. For the rest is referred to the chapter Oscilloscope (LIVE). The HOLD scope only works in ONE SHOT mode and does not measure 2 but 30 pages of 500 samples.
  • Page 48 When the data (measurement data, time and date of measuring) are writ- ten, the storage oscilloscope will wait for the next signal to meet the trigger conditions. If that occurs, new samples are taken and stored on disk in a new file.
  • Page 49 Chapter 6 Spectrum analyzer (device: SPECTRUM) The (storage)oscilloscope measures and displays signals in the time do- main: the voltage is plotted against the time. It is also possible to display measurement data in the frequency domain, the data is then plotted against the frequency.
  • Page 50 The Handyprobe HP2 spectrum analyzer displays an amplitude spectrum, which means that a 2 volt peak-peak sine wave is displayed with a 1 volt spectral component. Aliasing Like the oscilloscope, the spectrum analyzer needs a high enough sampling frequency to avoid aliasing. The result of aliasing when using FFT is that the frequency curve is folded back on itself.
  • Page 51 This means that because of the calculation errors extra frequency compo- nents are generated around the true frequency. Because of this 'smearing' the amplitude of the true frequency decreases, since the area under the curve remains the same. The smearing, caused by the calculation errors, can be decreased by pla- cing a window on the FFT-block of 1024 samples, in such a way that the ends of the FFT-block are smoothly tapered to zero and discontinuities do not occur when the FFT treats the windowed block as one period of a...
  • Page 52 The software supports five different windows: rectangular (all data remains the same) Hanning Hamming Blackman Bartlett A graphical representation of the different windows is given in the next illustration. The effects of the different windows are displayed next, together with the sinewave signal the spectrum is taken from.
  • Page 53 The measured sine wave Rectangular window Hanning window Hamming window Blackman window Bartlett window When using the rectangular window, the amplitude of the spectrum is lower than with the other windows. Smearing is larger with the rectang- ular window. Spectrum analyzer (device: SPECTRUM)
  • Page 54 Again some example illustrations, now with a sine wave exactly fitting in the FFT-block. The measured sine wave Rectangular window Hanning window Blackman window Hamming window Bartlett window Chapter 6...
  • Page 55 Similarities with the oscilloscope The spectrum analyzer has some similarities with the oscilloscope. The bottom row in the main menu contains choices that are similar to the ones in the oscilloscope devices. They will not be discussed here. Setting up the channel The channel of the spectrum analyzer can be set up to your own de- mands.
  • Page 56 Since there are different Handyprobe models, with different fre- Note quency ranges, not all of the following frequency ranges are availa- ble in the software. The following frequency ranges can be selected: 10 Hz, 25 Hz, 50 Hz, , 250 Hz, 500 Hz, 1 kHz, 2.5 kHz, 5 kHz, 10 kHz, 25 kHz, 50 100 Hz kHz, 100 kHz, 250 kz, 500 kHz, 1 MHz, 2.5 MHz, 5 MHz and 10 MHz.
  • Page 57 Averaging of spectra When the spectrum of a non-periodic signal (for example noise) is measu- red, AVERAGE can be used. By activating the choice AVERAGE, a popup menu appears, displaying 8 options. When AVERAGE is set to 10, 10 spectra will be measured, calcu- lated and averaged.
  • Page 58 Calculate the spectrum from the HOLD signal By activating HOLD->FFT, the spectrum of the first 1024 measuring points of the signal measured with the HOLD device is calculated. The frequency-axis and the voltage-axes are adjusted to the value of the HOLD device.
  • Page 59 Chapter 7 Voltmeter (device: VOLT) The Handyprobe HP2 is equipped with a voltmeter with digital display. The voltmeter functions as follows: 200 points are sampled. The measured data is processed, e.g. for calculating the RMS value or the mean value. 9 options can be carried out.
  • Page 60 Setting the signal coupling By activating the choice COUPLING AC/DC , the text changes from COUPLING AC to COUPLING DC or vice versa. In the hardware, a capacitor is switched into (AC) or out of (DC) the signal path. In COUPLING DC the complete signal (AC+DC) at the input is passed through.
  • Page 61 The data is compared with the HIGH VALUE. When the > then: data is higher than HIGH VALUE, PASS is displayed. When the data is smaller than HIGH VALUE, LO is display- The data is compared with the LOW VALUE. When the <...
  • Page 62 An AC voltage of 1 volt (RMS) is identical to a DC voltage of 1 volt. (Most -cheap- voltmeters only point the right value at a true sine voltage when an AC voltage is measured. The Handyprobe HP2 always points the correct value at the true RMS handling.) PEAK TO The peak to peak voltage of the sampled data is determined.
  • Page 63 mum value of a DC voltage of 1 volt is 1 volt. The maximum value of a true sine with a RMS value of 1 volt is 1.41 volt. The minimum value of the sampled data is determined. The MIN: minimum value of a DC voltage of 1 volt is 1 volt.
  • Page 64 Changing the units per volt By activating the choice UNITS/VOLT, you can enter a factor for the display. The value filled in will be multiplied with the measured value. Example: A thermocouple generating 1 volt per 5 degrees is measured. Then the number of UNITS/VOLT can be set at 5 allowing the direct reading of the correct number of degrees.
  • Page 65 > then HI < then LO >< COMP <> LO HI These measurements require a HIGH and a LOW value. With the choices SET HIGH VALUE and SET LO VALUE the two values can be set. Activating the choices will bring up a dialog box in which the size of the level can be entered in volts.
  • Page 66 To avoid errors like the one mentioned above, the frequency range of the voltmeter has to be set properly. The sampling frequency is then changed. By activating the FREQUENCY choice, a popup menu appears, display- ing 7 center frequencies. A frequency range is determined from 0.2 x f center to 10 x f center...
  • Page 67 Storing measurement values on disk or paper The voltmeter can store measurement values on disk or print them on paper. This is done in a different way than the other instruments. The voltmeter can be set to measure (acquire) at fixed times. The measu- red value will then be stored on disk or sent to the printer.
  • Page 68 In both modes, the measurement values are preceded by a block of infor- mation. In that block is indicated how the channel is set and how the HIGH, LOW and RELATIVE LEVELS are set. Each measurement is prece- ded by the time and date of the measurement. If a measured value is higher than the selected input range, '-----' is display- ed.
  • Page 69 Chapter 8 Transient recorder (device: TRANS) The transient recorder is direct registering measuring instrument, display- ing the changes of the input signal graphically on the screen or on paper. The transient recorder measures at settable, fixed times and processes the measured value if necessary.
  • Page 70 When true RMS, MEAN ,MIN or MAX is selected, the minimum Note sampling time will be 0.5 sec. Setting the frequency range By activating the FREQUENCY choice, a popup menu appears, display- ing 7 center frequencies. A frequency range is determined from 0.2 x f center to 10 x f center...
  • Page 71 At fixed times a sample is taken, until the number of samples to be taken is reached. While sampling, the sample number, the time and the measured value are displayed inverted. When the Handyprobe HP2 is connected to a relative slow com- Note puter, it may occur that, depending on the selected sampletime, the sample number, time and value are not being displayed.
  • Page 72 A crosshair, used for measuring, now appears. See the chapter oscillosco- pe HOLD for information about controlling the crosshair. During measu- ring with the crosshair, the value, the sample number and the time of the selected sample are displayed. When more than 500 samples are taken, the keys <PgUp> and <PgDn>...
  • Page 73 Chapter 9 Specifications Hardware A/D convertor sampling frequency 1, 2 , 5, 10 or 20 MHz input sensitivity full scale 500 mvolt (resolutie 3.91 mvolt) volt (resolutie 7.81 mvolt) volt (resolutie 15.6 mvolt) volt (resolutie 39.1 mvolt) volt (resolutie 78.1 mvolt) volt (resolutie 15.6 mvolt)
  • Page 74 Software Common hardcopy matrix, deskjet and laser printer Oscilloscope timebase usec (Sample frequency 20 MHz) usec (Sample frequency 10 MHz) usec (Sample frequency 5 MHz) usec (Sample frequency 2 MHz) usec (Sample frequency 1 MHz) usec (Sample frequency 500 kHz) usec (Sample frequency 250 kHz) usec (Sample frequency 100...
  • Page 75 xy-mode Spectrum analyzer frequency range 0.0195 - 10 Hz (res. 0.0195 Hz) 0.0488 - 25 Hz (res. 0.0488 Hz) 0.0977 - 50 Hz (res. 0.0977 Hz) 0.195 - 100 Hz (res. 0.195 Hz) 0.488 - 250 Hz (res. 0.488 Hz) 0.977 - 500 Hz (res.
  • Page 76 maximum overload voltage 500 volt peak to peak data acquire to disk and to printer Transient recorder measuring time between two measuring points 0.01..300 sec at a PC-XT the minimum time is 0.05 sec maximum number of measuring points to be taken 30,000 time-axis magnification 2..20 times...
  • Page 77 Notes...
  • Page 79 If you have any suggestions and/or remarks regarding the program, the Handyprobe HP2 or the manual, please contact: TiePie engineering TiePie engineering Koperslagersstraat 37 P.O. Box 290 8601 WL SNEEK 8600 AG SNEEK The Netherlands The Netherlands Fax: +31 515 418 819 Tel.: +31 515 415 416...
  • Page 80 Rev 1.01...