Universal Counter type U21005 (w/GM) User`s Manual
Contents
1. Universal Counter type U21005 w GM User s Manual Version 1 00 English 3B Scientific www 3bscientific com Overview 3B Scientific Universal Counter type U21005 is a microprocessor based Counter Specially de signed for the education in Physics The instrument has the following functions and measuring modes Frequency counting Continuous measurement Single measurement Pendulum continuous measurement Pendulum single measurement Period measurement Continuous measurement Single measurement Pendulum continuous measurement Pendulum single measurement Impulse counting Continuous counting Counting for 1 second Counting for 6 seconds Counting for 10 seconds Counting for 60 seconds Counting for 10 seconds followed by 5 seconds pause Counting for 10 seconds continuous Start A Stop B The time interval from A to B 1s measured positive or negative going pulses selectable on both input A and B Pass times Measures the pass times for A and B up to 9 per channel high level or low level selectabel on both input A and B Run Pass times Measures the time from A to B and the pass times for A and B positive high level or negative low level selectable on both input A and B The U21005 can be used as a stand alone instrument or together with a Personal Computer A Win dows program for operation and data logging from the instrument is supplied with the instrument Also a cable for connectin2. PHOTO MIC DIN socket for connection of photo gates or microphone POWER 230 V AC 230 VAC 50 60 Hz mains FUSE Mains fuse for instrument 0 5 AT RS232 INTERFACE RS232 interface to PC GM OPTION GM BNC bushing Connection for Geiger Muller tube GM Voltage regulation potmeter for the Geiger Muller tube Page 3 3B Scientific www 3bscientific com Instructions for use The instrument is powered by activating the switch marked POWER Immediately on power on the instrument displays the version number i e R 100 for approx 2 secs The counter 1s now ready for use The selected function and method of measurement are shown in the LCD display To change language turn off the power hold the SELECT and simultaneous switch on the power Use the SELECT button to change the language press FUNCTION to store the selection in memory Select a function with the push button FUNCTION and then the measuring method with the push button SELECT If the selected function has the option to select the trigger polarity then a simultaneous push on FUNCTION and SELECT displays the trigger polarity in the LCD display for each input Pushing the SELECT changes the trigger polarity Push the START STOP to store the selection in memory List of the functions and measurement methods Function Select Description FREQUENCY Con tinuous When START STOP is pressed frequency is continuously measured Sin o le measurin o When STA
3. function is selected with the push button FUNCTION and started when START STOP is pressed The positive or negative level counting is setup by pressing SELECT and FUNCTION simul taneously The current state of the setup 1s shown in the display 1 e ARA Pressing SELECT shifts through the four different combinations When satisfied press START STOP and the setup is stored in the internal Lithium Battery backup memory The LEDs Input A and Input B are lit The pass times on Input A and Input B are measured together with the run time the time from A to B During passage of A and B the light emitting diode at Input A and Input B are turned off A must be passed before B If A is passed several times before B the time in memory is the first passage of A The light emitting diodes Input A and Input B are turned off and the Run Time is displayed When the push button SELECT is pressed the Pass Time A is displayed and another push on SELECT displayes the Pass Time B If SELECT is pressed again the display sequence is repeated Display time unit is sec or msec All three measurements must have been read at least on time before a new measurement can be started by pressing START STOP Note Pressing FUNCTION will delete all results and the counter is prepared for new measurements Page 7 3B Scientific www 3bscientific com Option Geiger Muller amplifier module As standard the opti
4. pressed sequential GM input counting for 10 sec is started Geiger Muller tube is connected to the BNC plug marked GM at the rear panel of the counter The GM Voltage is adjusted with the knob GM Voltage at the rear panel of the counter Selecting the function IMPULSE COUNT GM the GM input at the rear panel ofthe counter is used as the only signal input source Description of the methods and how to use the function please consult the section Impulse Count as the methods are the same Page 8 3B Scientific www 3bscientific com PC program U21005 Installation Insert the CDROM in drive From Windows run the program lt D 3B Scientific U2 1005 PC software SETUP EXE gt Click the Target button to select where you want to install the program e g C U21005 Start the installation with the Start button The program is then installed on your hard disk and the Group 3B Scientific is added zix x Counter Type U21000 Version 3 00 Copyright fc 2003 EuroDidact Enter target directory Target Program Installation Processing File none ga I x LI Setup Complete Select Ok to create Program Manager group Start the program U21005 in the group 3B Scientific and select the ComPort from the File pull down menu used to connect to the Counter U21005 When the Counter U21005 has been correct connected with the supplied cable the program automatically displays
5. the current function set on the counter See the example below aio File Function Frequency kHz Start xl Use lt File gt lt Program information gt di 1 hi d COUNTER to display this window Type U21000 Version 3 01 Copyright EuroDidact U21000 Version 3 00 Page 9 3B Scientific www 3bscientific com In the pull down menu File the following is available ComPort Selection of the PC s Serial port COM 1 or COM 2 U21005 setup Data flow Selection of Start Stop or Continuous data flow from the counter to the PC Only active during IMPULSE COUNT and START A STOP B Language Select the language Program Information Displays the version of the program etc If a counter U21005 is connected the version of the instrument 1s also displayed Exit Exit program In the menu Function the following can be selected Frequency Continuous Continuous frequency counting Single Measurement Click Start for one single measurement Pendulum Continuous Continuous measurement of the frequency of a Pendulum Pendulum Single Meas Click Start for one single measurement of the frequency of a pendulum Period Continuous Continuous period counting Single Measurement Click Start for one single measurement Pendulum Continuous Continuous measurement of the pendulum time Pendulum Single Meas Click Start for one single measurement of the period time of a pendulum Impulse Count Continuous FI Con
6. A RT measured Up to 9 measurements per channel RUN amp PASS TIME When START STOP is pressed the run time from A to B and S TAR T the pass time for A and B are measured On the each of the above three functions and the pendulum selection in frequency and period the following applies When FUNCTION and SELECT are pressed simultaneously the start stop polarity triggering is shown on the display Pressing SELECT shifts through the four two different combinations possible Press START STOP to store the selection in memory for each individual function The setup is memorized even when the power is off Page 4 3B Scientific www 3bscientific com Frequency measurement Select frequency measuring with the push button FUNCTION and hereafter the wanted measuring function with the push button SELECT Press the button START STOP to start the frequency measurement If the measuring function S ingle measuring or Pendulum Single pendulum has been se lected anew frequency measurement is made every time the push button START STOP is pressed LED Input A is lit when the input the gate is open Selection of trigger polarity is possible if pendulum is selected The frequency is displayed in Hz or kHz Period measurement Select period measuring with the push button FUNCTION and hereafter the wanted measuring function with the push button SELECT Press the button START STOP to start the period
7. RT STOP is pressed a single measurement is started Pendulum Cont When START STOP is pressed a pendulum s freq is continuously measured Pendulum Sin o le When START STOP is pressed a single measurement is started PERIODES Continuous When START STOP is pressed the period time is measured continuously Sin ge measu rin o When START STOP is pressed twice a single measurement is started Pendulum Cont When START STOP is pressed a pendulum s period time is cont measured Pendulum Sin o le When START STOP is pressed a single measurement is started IMPULSE COUNT Continuous Count When sTarT SToP is pressed the impulse counting is started and runs until START STOP is pressed again 1 sec Countin o When START STOP is pressed counting for sec is started 6 sec Countin o When START STOP is pressed counting for 6 sec is started 10 sec Countin o When START STOP is pressed counting for 10 sec is started 60 sec Countin o When START STOP is pressed counting for 60 sec is started Count 10s Hold 5S when sTARTISTOP is pressed counting for 10 sec is started followed by 5 sec pause 10s Continuous When START STOP is pressed sequential counting for 10 sec is started At frequency period and impulse measurements only input A is used START A STOP B S TA RT When START STOP is pressed the time from A to B is measured PASS TIME When START STOP is pressed pass times on A and B are S T
8. d B The function is selected with the push button FUNCTION and started when START STOP is pressed The positive or negative level counting is setup by pressing SELECT and FUNCTION simul taneously The current state of the setup is shown in the display 1 e Pressing SELECT shifts through the four different combinations When satisfied press START STOP and the setup is stored in the internal Lithium Battery backup memory The LEDs Input A and Input B are lit The pass times on Input A and Input B are measured independent from each other During passage of A and B the light emitting diode at Input A or Input B is turned off The number of pass times on each input is constantly shown in the display 2 4 indicates 2 pass times on A and 4 on B The counter s memory holds up to 9 pass times per input When no more measurements are needed press START STOP once and the light emitting diodes Input A and Input B are turned off Each time the push button SELECT is pressed the measurements are read out one by one The measurements are numbered Al 9 or B1 9 The readings are in sec or msec All measurements must be read at least once before new measurements can be started by pressing the START STOP push button Note When FUNCTION is pressed all measurements are deleted and the counter is prepared for new measurements Page 6 3B Scientific www 3bscientific com Run and Pass times The
9. g the U21005 and the PC serial port COM 1 or COM 2 is supplied The Geiger Muller amplifier module is as standard supplied with the U21005 Page 2 3B Scientific www 3bscientific com OPERATION FRONT PANEL gt POWER l 1 FUNCTION START STOP Hr kHz a ma SWITCH SWITCH PHOTOMIC PHOTOMIC REAR PANEL ial I TIMER pial tl O FUNCTION Tris RR SELECT START STOP 700 a ip PHOTOMIC MPULSE swiTcH PHOTOMmic POWER Fig 1 Overview of the counter U21005 POWEROn Off contact FUNCTION Push button for selection of function Push to select next function SELECT Push button for selection of measuring method and for use with display of results START STOP Push button to start and stop of measurement Hz Light emitting diode LED for indication of measurement in Hz KHZ Light emitting diode LED for indication of measurement in kHz S Light emitting diode LED for indication of measurement in seconds ms Light emitting diode LED for indication of measurement in msec Display 4 digit LED display for results Display 2x16 character LCD display for function selection setup etc A Input A light emitting diode B Input B light emitting diode IMPULSE Electrical impulse input A IMPULSE Electrical impulse input B SWITCH Electro mechanical switch input A SWITCH Electro mechanical switch input B PHOTO MIC DIN socket for connection of photo gates or microphone
10. measurement If the measuring function S ingle measuring or Pendulum Single pendulum has been se lected a new period measurement is made every time the push button START STOP is pressed Selection of trigger polarity 1s possible if pendulum is selected LED Input A is lit when the input the gate is open The period time is displayed in sec or msec Impulse counting Select impulse counting with the push button FUNCTION and hereafter the wanted counting functions with the push button SELECT At all counting functions the Input A LED is lit when counting If Continuous has been selected the counter is started when START STOP is pressed The counter can be stopped and restarted without resetting the counter by pressing the START STOP If the counter has to be reset count set to zero push START STOP to stop the counting and thereafter push FUNCTION to reset and prepare the counter for a new counting If count time has been selected to 1 6 10 or 60 seconds 1 s 6 s 10 s 60 S anew counting time is started by pressing START STOP The counter can not be restarted ifa count is in progress If Count 10s Hold 5s has been selected the counter is started when START STOP is pressed Counting is done in segments of 10 seconds with a 5 seconds interval pause The counter is reset before each 10 seconds counting The function is stopped when FUNCTION is pressed and the counter is then rese
11. measurement Pendulum single measurement Period Range 0 01 Hz 99 9 kHz Resolution 0 01 msec 10 msec dependent on the input signal Method Continuous measurement Single measurement Pendulum continuous measurement Pendulum single measurement Impulse Count Range 0 9999 impulses per second Resolution 1 impulse Method Continuous counting Counting for second Counting for 6 seconds Counting for 10 seconds Counting for 60 seconds Counting for 10 sec followed by 5 sec pause Counting for 10 sec continuous Start A Stop B Range 0 01 msec 100 sec Resolution 0 01 msec Pass Time Range 0 01 msec 100 sec Resolution 0 01 msec Method Simultaneous on both channels Memory Up to 9 times per channel Pass Run Time Range Resolution Method Memory 0 01 msec 100 sec 0 01 msec First pass time on A and then pass time on B One set of measurements Run Time A to B Pass Time A and Pass Time B Page 11 3B Scientific www 3bscientific com
12. onal Geiger Muller amplifier module 1s installed in the U21005 and the number of measurement functions in IMPULSE COUNT are expanded as follows Function Select Description IMPULSE COUNT Continuous Count when STARTISTOP is pressed the impulse counting is started and runs until START STOP is pressed again 1 sec Countin o When START STOP is pressed counting for sec is started 6 sec Countin o When START STOP is pressed counting for 6 sec is started 10 sec Countin o When START STOP is pressed counting for 10 sec is started 60 sec Countin o When START STOP is pressed counting for 60 sec is started Count 10s Hold 5S when sTARTISTOP is pressed counting for 10 sec is started followed by 5 sec pause 10s Continuous When START STOP is pressed sequential counting for 10 sec is started IMPULSE COUNT GM Continuous Count when sTARTISTOP is pressed the GM input counting is started and runs until START STOP is pressed again 1 sec Countin o When START STOP is pressed GM input counting for 1 sec is started 6 sec Countin o When START STOP is pressed GM input counting for 6 sec is started 10 sec Countin o When START STOP is pressed GM input counting for 10 sec is started 60 sec Countin o When START STOP is pressed GM input counting for 60 sec is started Count 10s Hold 55 When start sTopP is pressed GM input counting for 10 sec is started followed by 5 sec pause 10s Continuous When START STOP is
13. t and pre pared for a new measurement If 10s Continuous has been selected the counter is started when START STOP is pressed The counting sequence is continuous with 10 seconds counting followed by a 5 seconds dis play lock for reading the result The counter is reset and restarted every 10 seconds even if the display is locked the counter is still counting The function is stopped when FUNCTION is pressed and the counter is reset and prepared for anew measurement Page 5 3B Scientific www 3bscientific com Start A Stop B The function is selected with the push button FUNCTION and started when START STOP is pressed The time measurement starts when an impulse occurs at input A and stops when an impulse occurs at input B The time is displayed in usec msec The positive or negative going triggering is setup by pressing SELECT and FUNCTION simultaneously The current state of the setup is shown in the display 1 e A RP Press ing SELECT shifts through the four different combinations When satisfied press START STOP and the setup is stored in the internal Lithium Battery backup memory The LEDs Input A and Input B are lit until an impulse has occurred at each input When the measurement is stopped a new measurement is prepared when START STOP is pressed The function is aborted if FUNCTION is pressed again and the counter is reset and prepared for a new measurement Pass times A an
14. tinuous impulse counting I sec F2 Impulse counting for 1 sec 6 sec F3 Impulse counting for 6 sec 10 sec F4 Impulse counting for 10 sec 60 sec F5 Impulse counting for 60 sec Start A Stop B Pass Time Pass Run time 10 sec 5 sec Pause 10 sec Continuous F6 Impulse counting for 10 sec followed by 5 Sec pause F7 Impulse counting for 10 sec continuous IF Geiger Muller module 1s installed the following is added GM Continuous Shift F2 GM Continuous impulse counting GM 1 sec Shift F3 GM Impulse Counting for 1 sec GM 6sec Shift F4 GM Impulse Counting for 6 sec GM 10 sec Shift F5 GM Impulse Counting for 10 sec GM 60 sec Shift F6 GM Impulse Counting for 60 sec GM 10 sec 5 sec Pause Shift F7 GM Impulse counting for 10 sec followed by 5 sec pause GM 10 sec Continuous Shift F7 GM Impulse counting for 10 sec Measures Run Time from A to B continuous Measures Pass Time for A and B Up to 9 times per channel Measures Run Time from A to B and the Pass Time for A and B Page 10 3B Scientific www 3bscientific com Technical Information Mains supply Input A and B 230 VAC 10 50 Hz 20 VA Input impedance 500 kOhm Sensitivity 200mV Trigger polarity positive going or negative going individually selectable in each function if relevant Frequency Range 0 01 Hz 99 9 kHz Resolution 0 01 Hz 10 Hz dependent on the input signal Method Continuous measurement Single measurement Pendulum continuous
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