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PSM3750 Quick User Guide

 

 

 

Page 72 

 

 

8.6   SCOPE 

–

 Oscilloscope Mode   

 

The PSM3750 provides a digital storage oscilloscope function in order to view the 
waveforms being measured. 

The settings for the oscilloscope are configured by press

ing the “SCOPE” button 

twice. 

Upon entering the “SCOPE” menu, the following screenshot will be displayed

. 

 

 

Timebase: 

The display for the oscilloscope is divided into 10 divisions along the 

time axis with the selected timebase displayed in the bottom left hand corner of 

the display. The timebase may be set to any real value between 15μs/div to 

5s/div. Pressing the          arrows on the main panel will adjust the timebase by 
a factor of 2. 

Trigger Reference: 

The data source for the trigger can be selected to be 

Channel 1, Channel 2 or Channel 3 (if fitted). 

Trigger Level: 

The trigger level is set directly in Volts in relation to the trigger 

reference settings and does not change if the range is changed. The trigger level 
is displayed by a small > on the extreme left hand edge of the display. If the 
trigger is set to a value above or below the range of the input channel then a 
small carat ^ is shown at the top or inverted at the bottom of the display as 
appropriate. 

 

 

 

Содержание PSM3750 NumetriQ

Страница 1: ...PSM3750 START UP GUIDE Firmware v1_27 23rd February 2016...

Страница 2: ......

Страница 3: ...ed Pages 26 27 7 2 Zoom Functions Pages 28 29 7 3 7 4 Measurement Options Acquisition Page 30 Pages 30 33 7 5 Sweep Pages 34 37 7 6 FRA Pages 38 39 7 7 7 8 8 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 Trim Comms...

Страница 4: ...ssing or damaged during transportation immediately contact your local sales distributor or N4L office MODEL Mains Lead Voltage Probe 4mm Black Lead 4mm Red Lead Black Croc Clip Red Croc Clip N4L 2GB M...

Страница 5: ...below the line of sight The design also allows storage under the unit without obstruction of the rubber feet so that instruments can be stacked and is easily removed to allow the connection of rack m...

Страница 6: ...front of the instrument Pic 3 Also a correctly fitted handle will allow storage under the unit Pic 4 Incorrect 1 Incorrect 2 Fitting the handle from the bottom of the unit as shown here is wrong Inco...

Страница 7: ...ly grounded supply The inputs and outputs must not be connected to common mode signals greater than 500V peak The inputs must not be connected to signals greater than 500V peak Keep the ventilation ho...

Страница 8: ...power cord or cables Doing so may cause an electric shock or a fire Do not place any object on this instrument Do not use this instrument if faulty If you suspect the instrument to be faulty contact...

Страница 9: ...button then the Left Arrow If the problem cannot be resolved directly then you will be given an RMA number and asked to return the unit The instrument will be repaired or replaced at the sole discreti...

Страница 10: ...ay Screen 2 Screen Display Function Buttons 3 PSM Function Mode Buttons 4 Handle 5 Measurement Control Function Keys 6 Rubber Feet 7 Menu Selection and Cursor Controls 8 Measurement Settings Buttons 9...

Страница 11: ...minal size of the window and therefore the update rate and time constant of the filter Greater stability is achieved at a slower speed at the expense of a slower update rate Very Slow Update rate 10s...

Страница 12: ...ed in smoothing is reset in response to a significant change in data This speeds up the response of the instrument to changing conditions Fixed Time Auto reset can be disabled so that the filtering ha...

Страница 13: ...0 steps Steps Log Set to view the resultant data in a Logarithmic format Linear Set to view the resultant data in a Linear format Sweep Select between either a single or repeating sweep Graph 1 Scalin...

Страница 14: ...hange the format to which the instrument responds to future commands via Comms interface Normal Data resolution set to 5 decimal points High Data resolution set to 6 decimal points Binary Data transmi...

Страница 15: ...old Zoom 1 Zoom 1 parameter selected for alarm threshold Zoom 2 Zoom 2 parameter selected for alarm threshold Zoom 3 Zoom 3 parameter selected for alarm threshold Zoom 4 Zoom 4 parameter selected for...

Страница 16: ...amplitude in dBm with reference to 600 load Amplitude Manually enter the amplitude Vpk value to be applied To the DUT Amplitude Step Size Manually enter a value by which the amplitude will increase de...

Страница 17: ...ranging Full Autorange Default setting Full autoranging will be selected and implemented within the instrument Range up Only Selecting this option will allow the test being carried out to find the hig...

Страница 18: ...being carried out to find the highest range via peak detection and hold on this range Once this value has been found another test can be carried out by pressing the Trigger button which will restart...

Страница 19: ...80 Commonly used in circuit analysis 0 to 360 Commonly used in power applications 0 to 360 Select as required Phase Reference Phase Reference Sine or Cosine only changes the phase of a harmonic you wi...

Страница 20: ...ocessing release version FPGA Release Field Programmable Gate Array release version Boot Release Release version of instruments boot up firmware Last Calibration Instruments last calibration date Auxi...

Страница 21: ...illoscope The PSM3750 provides a storage oscilloscope function in order to view the waveforms being measured PROG Recall Store Delete of non volatile programs Memory Program store recall options Inter...

Страница 22: ...set START Start button will commence any frequency sweep Is also the button used to initialise a screen dump of any data displayed onto a USB memory stick STOP Stop button will stop any frequency swe...

Страница 23: ...PSM3750 Quick User Guide Page 21 5 Rear Panel Layout 1 Input Connections 2 Output Connections 3 Mains Supply Inlet 4 Communication Ports 5 Auxiliary Ports 6 IAI2 Connection Port 1 2 6 5 4 3...

Страница 24: ...TTING THE TIME Power Analyzer Default Screen Appears Press SYS Key System Option Screen Opens Press Key Flashing Red Cursor will surround Hrs Use Numerical Keys Set Hours within cursor Press Enter Key...

Страница 25: ...r Opens Press Key Select Month to be entered Press Enter Key Month will be set Press Key Flashing Red Cursor moves to Year Use Numerical Keys Set Year within Cursor Press Enter Key Date will now be Se...

Страница 26: ...ess Key Red cursor moves to supervisor access Press Key Changes between Enable Disable option Press Enter Key Supervisor access selected Press Key Red cursor moves to User Data Use Numerical Keys On t...

Страница 27: ...o the signal generator output The output is fully isolated from earth to 600Vpk cat II PSM3750 has two or three isolated high bandwidth voltage inputs which use direct digital analysis at low frequenc...

Страница 28: ...the instrument before commencing any tests to ensure accurate readings Default screen FRA will be displayed after initialisation Due to the fact that the PSM3750 generator is switched off by default...

Страница 29: ...e 27 The display should now indicate a magnitude value of about 1 4V on all channels each of which should indicate the 3V range having been selected Check that the gain reads 0 000dB 0 010dB and that...

Страница 30: ...will flash around currently selected zoom parameters Press DELETE Red Boxes will disappear replaced by 1 white flashing box Press Keys Move Box to desired measurement parameter to be zoomed Press ENTE...

Страница 31: ...resolution 6 digits this can be displayed when enabled in ZOOM level 2 or 3 To set ZOOM 2 or 3 to high resolution access the SYSTEM OPTIONS menu and scroll down to zoom 2 high resolution as shown Pre...

Страница 32: ...equivalent to a first order RC low pass filter There are 5 pre set speed options that adjust the nominal size of the window and therefore the update rate and the time constant of the filter Greater st...

Страница 33: ...lly input using the numerical keypad and pressing ENTER There are two time constants for the smoothing filter Normal or Slow or the filter can be deselected The filter applies an auto reset function t...

Страница 34: ...pressing TRIGGER When the PSM3750 s own generator is not used and so the measurement is synchronised to the input frequency measured on CH1 there is a low frequency option that extends the frequency...

Страница 35: ...dwidth of the instrument usually set to auto can be forced to wide or low When not in auto selection heterodyning is disabled and the bandwidth is either 5MHz wide or 100 KHz low to minimise noise whe...

Страница 36: ...sing the PSM3750 can be swept across a frequency range The start frequency stop frequency and number of steps up to 2000 can be entered manually by the user Setting the steps parameter to log or linea...

Страница 37: ...le results from a sweep set to Linear Graph and Table results from a sweep set to Log To view the Graph or Table data as displayed above either during or upon the completion of a sweep push the approp...

Страница 38: ...be configured to be left in auto scaling mode or be set manually by the operator When graph 1 or graph 2 scaling is set to manual the user will have the opportunity to manually enter the upper and lo...

Страница 39: ...g each scale as in the earlier screenshot we are then able to view this data as a plotted graph Displayed right is the graph with the appropriate scaling as set earlier Also displayed is a frequency m...

Страница 40: ...from the signal can increase the resolution of signal measurements as shown in the following screenshots Signal generator set as below with a 100mVpk sinewave and a 5V dc offset connected across the...

Страница 41: ...easurement from the 100mV input whilst ignoring the 5V dc offset with the autoranging now set onto the 300mV range Accuracy for the RMS mode 0 075 range 0 075 reading 0 05mV 10 kHz So the greater accu...

Страница 42: ...oop control of the generator amplitude It will allow a specific measurement on CH1 CH2 or CH3 if fitted to be set and the generator output will be adjusted to maintain this fixed voltage or current Vi...

Страница 43: ...TROL display This will now be the maintained measured voltage or current and will allow a much more controlled level over changing levels such as a frequency sweep At each measurement point the measur...

Страница 44: ...nt data will be displayed within the data resolution parameter and change the format to which the instrument responds to future commands via a Comms interface For further information on each parameter...

Страница 45: ...lating to the IAI can be found within section 7 2 PSM3750 IAI OUT The OUT mode refers to the PSM3750 output generator Information relating to all of the outputs parameters can be found in section 4 1...

Страница 46: ...meter the user can select which measurement function they wish to select from the drop down menu These are also available via the direct function button on the PSM3750 s front panel Except Harmonic An...

Страница 47: ...de by pressing the FRA button Use the arrow until the red box surrounds the gain phase margins parameter now press arrow to enable this function these parameters will now be displayed within the graph...

Страница 48: ...hange the output to ON Within the CH1 CH2 menu set the coupling to ac only as described in an earlier section called FRA Sweep with ac Coupling Pressing will take you directly to the CH2 display Chann...

Страница 49: ...data but as a bode plot presentation it can be noticed that a cursor is also present on the graph at the same frequency point as we saw in the table display above using the arrows will move the curso...

Страница 50: ...se referred to CH1 the reference input The individual components are filtered separately to minimise the effects of noise which would have random phase and would therefore be filtered out The true rms...

Страница 51: ...until the red box surrounds the null meter parameter press the arrow to open up the drop down menu as shown Select either auto or manual range Selecting manual will allow the user to set their own up...

Страница 52: ...nge as the signal varies When manually ranging ZOOM and ZOOM adjust the range by a decade There is a phase offset option that applies a vector rotation of a user selectable phase shift to the CH2 inpu...

Страница 53: ...r in sweep mode each result comprises a single window without any filtering The ZOOM function can be used to select up to four parameters from the display when in real time mode It has no function fol...

Страница 54: ...ich they are used In many cases components are used under conditions where the parasitic effects of the component become critical and must be measured reliably over a wide range of operating condition...

Страница 55: ...BNC leads from the BNC connectors on the rear of the IAI2 OUT CH1 and CH2 to the corresponding isolated BNC connectors on the PSM3750 above it Connect the ribbon cable from the extension port on the...

Страница 56: ...750 Quick User Guide Page 54 Front View Connect the Red Kelvin Lead to the Signal and Sense BNC connectors on the front of the IA2 and connect the Black Kelvin Lead to the Sense and Signal BNC connect...

Страница 57: ...he RMS Voltmeter display unless a program has been stored within PROG 1 Configuration of PSM3750 IAI2 Press the AUX key on the PSM3750 The auxiliary device will appear as shown from the dropdown menu...

Страница 58: ...ear but all 4 led s remain illuminated and flashing then check that the IAI2 is correctly connected to the supply switched on at the rear and the fuse is intact To test that the IAI2 is responding con...

Страница 59: ...rrent through the DUT SHUNT VALUE LOW 5 NORMAL 50 HIGH 5k VERY HIGH 500k When the Shunt is selected on the instrument via the AUX menu as described earlier the resistance value is automatically entere...

Страница 60: ...obtained with impedances within a factor of 100 of the shunt value It is necessary to take great care in order to achieve the best accuracy of measurement The leads of the component must be scrupulou...

Страница 61: ...OW 50 10MHz NORMAL 50m to 50k all HIGH 5 to 5M all VERY HIGH 1M 1kHz Of course this table is only a guide and each shunt can be used beyond the limits quoted Automatic shunt selection can be configure...

Страница 62: ...ple connections to a discrete component The Kelvin Leads can be clipped onto the body of the DUT as close as possible to the component For accurate measurements it is essential that the component lead...

Страница 63: ...ht finger pressure To insert a component push up the upper contact plate so that the legs of the component can be inserted If necessary push up the upper contact plate on one side first and then the o...

Страница 64: ...d At higher frequencies it is almost always necessary to compensate for stray effects unless using the HF component fixture connected to the front of the IAI2 There are 2 forms of compensation 1 Short...

Страница 65: ...CUIT CONNECTION Compensation Menu Settings With the PSM3750 set in LCR mode press the ZERO button to display the LCR compensation screen as shown below Select the compensation parameter to correspond...

Страница 66: ...y default then sweep compensation will be carried out on each individual shunt in turn over the sweep parameters set earlier Note When undertaking open compensation it is advisable to use a solid piec...

Страница 67: ...measurement settings to be made as shown below Parameter setting If the parameter option within the LCR menu is set to auto the PSM3750 will display capacitance or inductance according to the phase of...

Страница 68: ...alternatively it can sweep a range of frequencies and present the results as a table or graph Before performing a sweep either series circuit or parallel circuit must be selected from within the LCR...

Страница 69: ...digital filter in sweep mode each result comprises a single window without any filtering unless repeat sweep is selected External frequency Reference Although it is most unusual not to use the PSM375...

Страница 70: ...will then adjust the generator output level until the measured voltage across the component is as specified NOTE AC level and tolerance parameters are set for screenshot purposes only The optimum tes...

Страница 71: ...es shown are for illustration purposes only The peak measurement is simply the value with the largest magnitude Positive and Negative peaks are independently filtered then the result with the largest...

Страница 72: ...hen data is missed is when an autozero measurement is requested this can be disabled within the SYSTEM menu if required The ZOOM function can be used to select any combination of up to four parameters...

Страница 73: ...ories from N4L Current Transformers and clamps may be used if fitted with a suitable burden resistor The power meter will operate either from its own generator or more normally will use the frequency...

Страница 74: ...the display The timebase may be set to any real value between 15 s div to 5s div Pressing the arrows on the main panel will adjust the timebase by a factor of 2 Trigger Reference The data source for...

Страница 75: ...set to ON a low pass filter is applied to the trigger data to stabilise the trace with noisy signals The filter only influences the trigger detection and does not change the data displayed Pretrigger...

Страница 76: ...ith Dual cursors configured From the screenshot above output set to 50Hz 2Vpk the display shows all fundamental measurements from the position of cursor 1 Also displayed is the time difference between...

Страница 77: ...eal time The settings for the harmonic analyzer are configured from within the MODE function as there is no direct button to press Press MODE and select harmonic analyzer from the dropdown menu within...

Страница 78: ...ose of this manual the output signal was generated using the PSM3750 s own generator as shown within the next screenshot where it can be seen that the output frequency was set to 1 kHz From the real t...

Страница 79: ...he signal being received as shown Here we are able to view the squarewave signal that was previously set within the OUTPUT menu screen and which was being analyzed for this guide NOTE If the SCOPE but...

Страница 80: ...fety isolated For easy configuration of the PSM3750 refer to the N4L website in order to download a PSM3750 BATT470 configuration file This is available within the applications section Battery Cell El...

Страница 81: ...6 Connect DUT ve to GEN ve 7 Connect GEN ve to BATT470 AHi 8 Connect DUT ve to BATT470 ALo 9 Connect PSM CH1 across DUT ve 10 Set SW1 SW2 to TEST 11 Wait 1 minute for settling 12 Perform Test Note 1 E...

Страница 82: ...mal points plus any exponent eg 1 2345 E00 Selecting High will set the Data Resolution to 6 decimal points plus any exponent eg 1 23456 E00 For higher speed transfer a proprietary binary format can be...

Страница 83: ...drop down menu Default Setting is 19200 To use a USB lead to connect set the interface parameter to read USB Configuring the interface to LAN will then display the IP address applicable to your instru...

Страница 84: ...nominated program within the PROG settings To recall a Comms configuration set the recall option to ON then recall the appropriate program Remember to set this first before recalling your saved progr...

Страница 85: ...B Memory Stick The following section explains the procedure for storing a Frequency Sweep onto USB memory stick 1 Setup Sweep Parameters SWEEP MENU 2 Press START to commence Sweep 3 Insert Memory Stic...

Страница 86: ...s for ease of identification Select execute and press enter to transfer data to memory stick 5 Message will appear on screen writing to USB please wait 6 Data will be transferred onto the memory stick...

Страница 87: ...de Page 85 11 File location box will appear as below 12 Click on and open the dropdown menu box showing All Excel Files and change to All Files 13 Locate saved txt file from folders 14 Double click on...

Страница 88: ...ill appear as shown below now change file type from Fixed width to Delimited 16 With Delimited selected click on Next 17 Delimiters screen will appear as shown within the next screenshot 18 Make sure...

Страница 89: ...PSM3750 Quick User Guide Page 87 19 New screen will appear then click on Finish Data will be exported into an Excel spreadsheet as shown...

Страница 90: ...ure for storing recalling or deleting a program to or from the instruments internal memory or USB memory Stick 1 Press PROG button to open up program store recall mode 2 Select memory type to be used...

Страница 91: ...PSM3750 Quick User Guide Page 89 4 Select the action to be taken in association with the data selected...

Страница 92: ...on 0 FACTORY DEFAULT and cannot be changed Location 1 Upon start up should any program be stored within program 1 then the PSM will automatically recall this program 6 Enter a name within this paramet...

Страница 93: ...PSM3750 Quick User Guide Page 91 7 Upon implementing any of the above actions then remember to scroll down to EXECUTE and press ENTER to validate your selection action...

Страница 94: ...section on the main header then clicking on the go to downloads link at this point you will be asked to login or register Once your registration has been authorised you will then be authorised to visi...

Страница 95: ...wn Connect a double BNC connector to the OUTPUT BNC then run 2 separate BNC leads from the output connecting to CH1 BNC and to CH2 BNC 2 Make sure program 0 factory default is set within the PROG menu...

Страница 96: ...the front panel this button is a direct button to set this parameter as MEGA Hertz press ENTER 10 000MHz will now be set Use the arrow to scroll to steps enter 500 from the numerical keypad and press...

Страница 97: ...accumulated across the full frequency range Sweep will cease upon the completion of 500 steps which will be at a frequency of 10MHz 7 Store Results Upon completion of your sweep press the PROG button...

Страница 98: ...Page 96 Upon completion of the top 5 parameters use the arrow until the red box surrounds execute Press ENTER a message will appear underneath execute as shown Use the to move the red box to the new...

Страница 99: ...memory stick and an onscreen message will be displayed upon completion Inserting the memory stick into your PC you will now find 2 files a txt and N4L file as shown below save these to a location on...

Страница 100: ...ibrated annually Contact details 1 Newtons4th Ltd 1 Bede Island Road Leicester LE2 7EA United Kingdom Tel 0116 230 1066 International 44 116 230 1066 Fax 0116 230 1061 International 44 116 230 1061 E...

Страница 101: ...table from 0 2 seconds Phase Angle Voltmeter Measurement In Phase Quadrature Tan Magnitude Phase in phase ratio rms rms ratio LVDT differential LVDT ratiometric Frequency Range 10 Hz 50MHz Basic Accur...

Страница 102: ...urrent Shunt External Current Accuracy As Voltage External Shunt Tolerance Watts Accuracy 0 1 VA range 0 1 reading External Shunt Tolerance Signal Generator Type Fully Isolated 10Vrms output protected...

Страница 103: ...lyser Interface PSM3750 3CH IAI2 3 Channel PSM3750 Impedance Analyser Interface IAI2 Impedance Analyser Interface Specification Frequency Range 10 Hz to 50MHz Measurement Parameters L C R Phase QF Tan...

Страница 104: ...ons user selectable Datalog Window From 10ms with no gap between each log Memory RAM or Non Volatile Memory up to 16 000 records General Display 480X272 dot full colour TFT White LED backlit Dimension...

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