LAB 1 INTRODUCTION TO LAB INSTRUMENTS Objective

Lab 1 Introduction To Lab Instruments Objective-Free PDF

  • Date:09 Dec 2019
  • Views:30
  • Downloads:0
  • Pages:20
  • Size:1.57 MB

Share Pdf : Lab 1 Introduction To Lab Instruments Objective

Download and Preview : Lab 1 Introduction To Lab Instruments Objective


Report CopyRight/DMCA Form For : Lab 1 Introduction To Lab Instruments Objective


Transcription:

ME588 Lab 1 Spring 2015, the proper excitation input signals to the circuit so that you can measure the output and obtain the information that. you are seeking, a On the prototyping board build the following RC circuit. b Select a resistor with a resistance value R between 10 k and 100 k Also select a capacitor with a capacitance. value C between 1 F and 10 F, c Measure the resistance value R using the multimeter and Intuilink software Take ten or more measurements. and obtain some statistical characteristics of the precision and accuracy of your measurement. d Write down the first order differential equation that relates the input voltage Vin and the output voltage Vout. Identify the time constant for this first order ODE and write down its value based on the resistance and. capacitance that you used don t forget about the units Write down the bandwidth cut off frequency based. on the 3 dB definition of the low pass filter that you built. e Measure the rise time and the 5 settling time of the step response of the RC circuit What input signal s did. you use Compare the theoretical time constant value with the measured time constant value Do they match If. not how would you account for the discrepancy Use the oscilloscope and associated software to find and record. all values Be sure to include a plot of input and output signals. f At the bandwidth cut off frequency measure the relative phase difference and magnitude ratio between the input. and output sinusoidal signals at that frequency What input signal s did you use Compare the theoretical cut off. frequency magnitude ratio and phase difference with the measured values Do they match If not how would. you account for the discrepancy Use the oscilloscope and associated software to find and record all values Be. sure to include a plot of input and output signals. g Use the FFT option on your oscilloscope to examine the frequency spectrum of both the input and output signals. from part f,ME588 Lab 1 Spring 2015, Appendix A HP AGILENT KEYSIGHT 3631A Triple Output Power Sup. The HP AGILENT KEYSIGHT 3631A has three power supplies a 6 V supply capable of delivering 5 A and a 25 V. supplies capable of delivering 1 A and a 25 V supply capable of delivering 1 A The ground output is the reference ground. and is connected to the ground of the building This is why it is important to connect the COM common terminal of the. 25 V supplies and the terminal of the 6 V supply to the ground reference Figure 1 shows the front panel of the. 3631A power supply, Figure 1 Front Panel of the HP AGILENT KEYSIGHT 3631A Power Supply.
To operate the power supply, 1 The OUTPUT ON OFF key turns the output ON or OFF. 2 To Set the Output Voltage, a Press the 6 V 25 V 25 V keys to select the power supply to be set. b Press the VOLTAGE CURRENT key so that the Volt Display is active. c Use the circular control knob to set the output voltage Use the arrow keys for selecting the resolution. 3 To Set the Maximum Output Current, a The DISPLAY LIMIT key lets you select the maximum current that the power supply can deliver up to 5 A. for the 6 V and 1 A for the 25 V supplies This is a current protection feature. ME588 Lab 1 Spring 2015, b Press the VOLTAGE CURRENT key so that the Current Display is active. c Use the circular control knob and the resolution keys to set this limit if needed. 4 To Read the Output Voltage or Output Current, a The VOLTAGE CURRENT key also shows the output voltage and the output current of the power supply.
b To measure the output current of the supply make sure that the DISPLAY LIMIT key is not active. ME588 Lab 1 Spring 2015, Appendix B HP AGILENT KEYSIGHT 33120A Function Generator. The HP AGILENT KEYSIGHT 33120A generates a whole range of waveforms with precise control on the frequency ampli. tude waveform shape offset voltage etc Figure 2 shows the front panel of the HP AGILENT KEYSIGHT 33120A function. Figure 2 Front Panel of the HP AGILENT KEYSIGHT 33120A Function Generator. ME588 Lab 1 Spring 2015,IMPORTANT The firmware inside the. HP AGILENT KEYSIGHT 33120A assumes that you have, placed a 50 load across its output in accordance with good. RF engineering practice It then calculates the output voltage by. dividing its internal open circuit voltage by two and displays. the answer If the circuit that you connect to the output of the. HP AGILENT KEYSIGHT 33120A does NOT have an equivalent. Thevenin impedance of 50 then the voltage displayed will be. inaccurate For a high impedance load you can set the display. to HI Z and the function generator will display the correct. number Do this by hitting,Blue shift MENU,right arrow to SYS MENU. down arrow to OUT TERM, The right left arrows or the knob now toggle you between 50.
and HIGH Z Set it to HIGH Z and hit enter The display. will now indicate the front panel voltage for a high impedance. 1 The AC waveform keys select the type of function sine wave square wave triangular wave or saw tooth wave. 2 The Freq key sets the frequency of the function, The sine and square waves can be set from 0 1 mHz to 15 MHz. The triangular and saw tooth waves can be set from 0 1 mHz to 100 kHz. 3 The Ampl key sets the amplitude of the function, The amplitude can be set from 100 mVppk to 20 Vppk into an open circuit 50 mVppk to 10 Vppk into a 50. 4 The OFFSET key allows you to add a DC offset voltage to the function. Normally the offset is set to zero volts and the AC waveform has an average value of zero However in some. cases it is good to offset the AC waveform to simulate DC and AC inputs to a circuit. You can also choose a positive or negative offset using the green key in the numerical entry. 5 The Shift Duty key allows you to set the duty cycle of a square waveform only. ME588 Lab 1 Spring 2015, Appendix C HP AGILENT KEYSIGHT 34401A Digital Multimeter. The HP AGILENT KEYSIGHT 34401A is a high precision 6 12 digit multimeter capable of measuring voltage current. resistance frequency time etc for DC and AC signals Throughout the lab experiments we will only use a small por. tion of its capabilities but you are encouraged to learn all that you can about it Figure 3 shows the front panel of an. HP AGILENT KEYSIGHT 34401A multimeter, Figure 3 Front Panel of the HP AGILENT KEYSIGHT 34401A Multimeter. 1 Measuring Voltages, Voltages are measured in parallel with a circuit The DC V or the AC V key should be selected Figure 4 shows.
an example of how to measure the voltage at a point VB VB is positive Figure 5 shows how to measure the voltage. across a component VBC VBC is positive,ME588 Lab 1 Spring 2015. Figure 4 Measurement of Voltage VB,Figure 5 Measurement of Voltage VBC. The input resistance of the voltmeter is 10 M This means that it will not load the circuit and result in a large. measurement error if the resistance is 300 k or smaller. 2 Measuring Currents, Currents are measured in series with a circuit Basically the current passes by the multimeter so that it can be. measured The DC V or AC V keys should be selected using the blue Shift key Figure 6 shows an example shows. how of to measure I I is positive,Figure 6 Measurement of Current. The input resistance of the ammeter is 0 1 for the 1 A and 3 A ranges and 5 for the 10 mA and 100 mA ranges. This means that it will not load the circuit and result in a large measurement even for most resistance values 100 k. ME588 Lab 1 Spring 2015, to 2 In order to measure a current you need to break the circuit and re route it through the multimeter This.
is not possible in finished I C boards and is the main reason why technicians engineers mostly measure voltages and. calculate I using V IR,3 Measuring Resistances, In order to measure a resistance the multimeter imposes a small voltage mV level on the resistor and measures the. resulting current The resistance is then R V I Two wire 2W resistance measurements are easy Connect the. resistor as shown below and press the 2W key,Figure 7 Measurement of Resistance. 4 Measuring AC Signals, The multimeter can also measure the RMS values of AC waveforms voltage or current depending on the connection. The AC waveform can be a sine wave square wave triangular or anything since the multimeter only measures its. RMS value root mean square The multimeter will also determine its frequency Freq and its period Shift Freq. The RMS voltages measurement is accurate up to 300 kHz and the RMS current measurement is accurate to 5 kHz. The frequency and period are accurate up to 300 kHz but can go to 1 MHz with 600 mVppk. 5 Measuring Continuity Cont, Many times it is necessary to check if a node is connected to another node via a short circuit For example you may. want to follow a ground node in a complicated circuit You can connect the two nodes to the V and LO inputs. just like voltage or resistance measurements and the multimeter will beep if there is a short circuit. 6 Setting the Resolution, The resolution keys are set using the Range Digit area You can select 4 5 6 resolution digits or simply Auto for.
automatic selection,7 Single Auto Hold Measurements. In noisy or time varying measurements the display is constantly changing and it may be helpful to take a single. measurement or hold a measurement until it is deleted This key does the job Use the Auto setting to set the. multimeter back into its normal operation,ME588 Lab 1 Spring 2015. Appendix D AGILENT KEYSIGHT DSO1012A Oscilloscope, The AGILENT KEYSIGHT DSO1012A Oscilloscope is useful Figure 8 shows the front panel of the oscilloscope. Figure 8 Front Panel of AGILENT KEYSIGHT 54622D Mixed Signal Oscilloscope. D 1 Time Domain Measurements, 1 The 1 and 2 keys turn on and off the display of the two analog channels. 2 The Auto Scale key automatically scales the display to show the waveforms Do not use this key too often You can. develop a very bad habit and never learn how to use a scope. 3 The Volts Div knobs change the amplitude axis scaling for each channel. You will find that you can easily saturate a scope and you should never do this The waveform must always be. within the display area,The scale is shown at the upper left corner.
4 The Position knob moves the zero amplitude point of the waveform up and down. 5 The Time Div knob changes the time axis scaling for both channels. 6 The Delay knob moves the zero time point of the waveform left and right. 7 Coupling and HF rejection can be configured on the channel menu by pressing 1 or 2. 8 The Coupling key selects the triggering coupling setting. AC coupling will not show the DC offset of the signal. DC coupling will show the DC offset of the signal,The LF Reject uses a 10 kHz cutoff. 9 The HF Reject key introduces low pass filter with a cutoff frequency of 100 kHz to reject all noise above 100 kHz on. the trigger path,ME588 Lab 1 Spring 2015,D 2 Triggering. The scope needs a signal to trigger its sampling circuitry The triggering signal could be derived from the signal itself or. from external or internal references, 1 The Menu key under the TRIGGER section opens the triggering options The following will assume that the triggering. options are shown on the right side of the screen, 2 The Mode button selects the triggering mode We will use EDGE at all times. 3 The Source button selects the source of the triggering signal. CH1 or CH2 will use the analog inputs for triggering. EXT will use an external signal for triggering, 4 The Slope button selects the slope of the signal for triggering.
Rising edge triggers as the signal crosses the trigger value while increasing. Falling edge triggers as the signal crosses the trigger value while decreasing. D 3 Measurements, The Measure key can be used to measure various time and amplitude properties of the analog signals. D 4 Cursors, The Cursors key can be used to place two amplitude and two time cursors on screen These can be used to estimate. measurements or compare the two analog signals, The Math key can be used to perform math on the analog signals The most frequently used of these options is FFT. ME588 Lab 1 Spring 2015,Appendix E BITSCOPE DSO Logic Analyzer. The DSO logic analyzer replaces mixed signal oscilloscopes with a cheap compact unit It is capable of analyzing up to. 2 analog channels and 8 digital channels The unit is entirely controlled by a desktop computer connected by LAN or. cross over cable,E 1 Setup of the DSO Software,1 Open the 586 folder on the desktop Run DSO.
2 Click SETUP on the right side, 3 Change the first connection to ETHERNET and enter the IP address from the top of the BitScope in the box to the. right Click Ok, 4 Click the POWER button to connect to the BitScope. 5 If the analog channels display a sawtooth wave there is likely a configuration problem. E 2 Analog Channels, 1 The ALT key on the right side enables display of only analog channels. 2 The yellow CH A block and green CH B block contain options for the analog channels. 3 The ON keys enable and disable the analog channels. 4 The first number box above ON is the amplitude scaling. Left Click the box to auto scale, Right click the box for a drop down menu of possible settings. 5 The second number box above ON is the input range. Left Click the box to auto scale, Right click the box for a drop down menu of possible settings.
6 The number box reading 1 1 is for scope probes with gain settings. Left Click the box to auto scale,Right click the box for a drop down me. LAB 1 INTRODUCTION TO LAB INSTRUMENTS Objective To become familiar with the instruments and software that will be used in the Mechatronics Lab Prelab Assignment 1 Go to the ME588 web site under the heading labeled Lab Resources and review the lab instrument manuals Introduction There are eight stations in the Mechatronics Laboratory

Related Books