Newtons4th PSM1700 User Manual
  1. Manuals
  2. Brands
  3. Newtons4th Manuals
  4. Measuring Instruments
  5. PSM1700
  6. User manual

Newtons4th PSM1700 User Manual

Psimetriq
Hide thumbs Also See for PSM1700:
Table of Contents

Advertisement

Quick Links

PSM1700 - PsimetriQ
USER MANUAL
Software Version 1.65
th
08
June 2017

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PSM1700 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Newtons4th PSM1700

Summary of Contents for Newtons4th PSM1700

  • Page 1 PSM1700 - PsimetriQ USER MANUAL Software Version 1.65 June 2017...
  • Page 2 “ Do not be hasty when making measurements.” PsimetriQ is a precision instrument that provides you with the tools to make a wide variety of measurements accurately, reliably, and efficiently - but good metrology practice must be observed. Take time to read this manual familiarise yourself with...
  • Page 3 DANGER OF ELECTRIC SHOCK Only qualified personnel should install this equipment, after reading and understanding this user manual. If in doubt, consult your supplier. RISQUE D'ELECTROCUTION L'installation de cet équipement ne doit être confiée qu'à un personnel qualifié ayant lu et compris le présent manuel d'utilisation.
  • Page 4 – do not attempt to open the instrument, refer service to the manufacturer or his appointed agent. Note: Newtons4th Ltd. shall not be liable for any consequential damages, losses, costs or expenses arising from the use or misuse of this product...
  • Page 5 PSM1700 PsimetriQ user manual DECLARATION OF CONFORMITY Manufacturer: Newtons4th Ltd. Address: 1 Bede Island Road Leicester LE2 7EA We declare that the product: Description: Phase Sensitive Multimeter Product name: PsimetriQ Model: PSM1700 Conforms to the EEC Directives: 2014/30/EU relating to electromagnetic compatibility:...
  • Page 6 In the event of any problem with the instrument outside of the guarantee period, Newtons4th Ltd. offers a full repair re-calibration service –...
  • Page 7 Detailed descriptions of the RS232 command set is given separate manual “PSM17xx communications manual”. Software Version 1.65 This manual is copyright © 2004-2017 Newtons4th Ltd. and all rights are reserved. No part may be copied or reproduced in any form without prior written consent. June 2017...

  • Page 8: Table Of Contents

    PSM1700 PsimetriQ user manual CONTENTS Introduction – general principles of operation ..1-1 Generator output ............ 1-3 Voltage inputs ............1-4 Getting started ..........2-1 Unpacking .............. 2-1 Keyboard and controls ..........2-3 Basic operation ............2-4 Measurement Selectivity .......... 2-5 Using the menus ..........
  • Page 9 PSM1700 PsimetriQ user manual Output control ........... 8-1 Generator specifications ........... 8-2 Input channels ........... 9-1 Trimming x10 oscilloscope probes ......9-4 10 True RMS Voltmeter ......... 10-1 10.1 RMS voltmeter specification ........10-4 11 Frequency response analyser ......11-1 11.1...
  • Page 10 PSM1700 PsimetriQ user manual APPENDICES Appendix A Accessories Appendix B Serial command summary Appendix C Available character set Appendix D Configurable parameters Appendix E Contact details...

  • Page 11: Introduction - General Principles Of Operation

    PSM1700 PsimetriQ user manual Introduction – general principles of operation PsimetriQ is a self-contained test instrument, with one output and two inputs, which incorporates a suite of test functions. PsimetriQ has a versatile generator output that can be used as signal generator for the following waveforms:...
  • Page 12 PSM1700 PsimetriQ user manual This general purpose structure provides versatile hardware platform that can be configured by firmware to provide a variety of test functions, including: signal generator two channel true rms voltmeter phase angle voltmeter (vector voltmeter) frequency response analyser (gain/phase analyser)

  • Page 13: Generator Output

    PSM1700 PsimetriQ user manual Generator output The generator consists of a DAC whose input is derived from a table held in RAM. The appropriate pattern is loaded into the RAM (sinewave, sawtooth etc.) by the DSP, and then the RAM address is stepped at a rate given by the selected frequency.

  • Page 14: Voltage Inputs

    PSM1700 PsimetriQ user manual Voltage inputs Each input consists of a high impedance buffer followed by switch to select ac or ac+dc coupling, then a series of gain stages leading to an A/D converter. Selection of the input gain and the sampling of the A/D converter are under the control of the DSP.

  • Page 15: Getting Started

    PSM1700 PsimetriQ user manual Getting started The PsimetriQ is supplied ready to use – it comes complete with an appropriate power lead and a set of test leads. It is supplied calibrated and does not require anything to be done by the user before it can be put into service.
  • Page 16 0dB 0.02dB, and that the phase reads  0.01. In the event of any problem with this procedure, please contact customer services at Newtons4th Ltd. or your local authorised representative: contact...

  • Page 17: Keyboard And Controls

    PSM1700 PsimetriQ user manual Keyboard and controls The keyboard is divided into 5 blocks of keys: display control (5 keys top left) function keys (6 keys top right) setup keys (middle 12 keys) menu control keys (7 centre keys) action keys (4 keys lower right)

  • Page 18: Basic Operation

    PSM1700 PsimetriQ user manual Basic operation Once the unit has powered on and is displaying the default RMS voltmeter screen, the required function can be selected by pressing the function key, FRA, PAV, LCR, RMS, POWER, HARM. Pressing the same function key again brings up the menu options specific to that function.

  • Page 19: Measurement Selectivity

    PSM1700 PsimetriQ user manual Measurement Selectivity In many applications that require frequency response analysis, it is common for the frequency of interest (sometimes referred to as the injected frequency) to be immersed in noise. It is therefore important that the FRA instrument being used is able to reject frequencies other than that of the signal of interest.
  • Page 20 PSM1700 PsimetriQ user manual While it is not required for the user to define the selectivity, nominal values used by the PSM units are defined in the following table: speed update rate normal time slow time Measurement constant constant Selectivity...

  • Page 21: Using The Menus

    PSM1700 PsimetriQ user manual Using the menus PsimetriQ is a very versatile instrument with many configurable parameters. These parameters are accessed from the front panel via a number of menus. Each of the main menus may be accessed directly from a specific key.
  • Page 22 PSM1700 PsimetriQ user manual Pressing the HOME key first time reverts to the opening state where the parameters are displayed but the cursor is hidden. Pressing the HOME key at this point exits the menu sequence and reverts back to normal operation.

  • Page 23: Selection From A List

    PSM1700 PsimetriQ user manual Selection from a list This data type is used where there are only specific options available such as the output may be ‘on’ or ‘off’, the graph drawing algorithm may use ‘dots’ or ‘lines’. When the flashing cursor is highlighting the parameter, the RIGHT key steps forward through the list, and the LEFT key steps backwards through the list.

  • Page 24: Numeric Data Entry

    PSM1700 PsimetriQ user manual Numeric data entry Parameters such as frequency and offset are entered as real numbers; frequency is an example of an unsigned parameter, offset is an example of a signed parameter. Real numbers are entered using the number keys, multiplier keys, decimal point key, or +/- key (if signed value is permitted).

  • Page 25: Text Entry

    PSM1700 PsimetriQ user manual Text entry There are occasions where it is useful to enter a text string; for example, a non-volatile program may have some text as a title. Text is entered by selecting one of 6 starting characters...

  • Page 26: Special Functions

    PSM1700 PsimetriQ user manual Special functions Display zoom PsimetriQ normally displays many results on the screen in a combination of small font size (no zoom) and up to 4 values in a larger font size (first zoom level). There is also an even larger font for up to 4 selected values (second zoom level).

  • Page 27: Program Store And Recall

    PSM1700 PsimetriQ user manual Program store and recall There are 100 non-volatile program locations where the settings for the entire instrument can be saved for recall at a later date. Each of the 100 locations has an associated name of up to 20 characters that can be entered by the user to aid identification.

  • Page 28: Zero Compensation

    PSM1700 PsimetriQ user manual Zero compensation There are 3 levels of zero compensation: Trim out the dc offset in the input amplifier chain. Measure any remaining offset and compensate. Measure parasitic external values and compensate. The trim of the dc offset in the input amplifier chain is re-...

  • Page 29: Alarm Function

    PSM1700 PsimetriQ user manual Alarm function PsimetriQ has two independent alarms that can be read remotely or can generate an audible sound Each of the alarms can be triggered by comparison to one or two thresholds: sound the alarm if the value exceeds a threshold...
  • Page 30 PSM1700 PsimetriQ user manual 1/3 of the measured value respectively. The repetition rate of the sounder then varies linearly as the value changes between these thresholds.

  • Page 31: Analogue Output

    PSM1700 PsimetriQ user manual Analogue output The analogue output is a 0 to 4V dc level that represents the selected measurement. To program the analog output, first select the functions for the zoom; up to four measurements can be selected for the display, the alarm is applied to any one of them;...

  • Page 32: Data Hold

    PSM1700 PsimetriQ user manual Data hold When in real time display mode, the data on the display can be held at any time by pressing the REAL TIME key. When HOLD is activated a warning message is briefly displayed and the word HOLD appears in the top right hand corner of the display.

  • Page 33: Parallel Port

    PSM1700 PsimetriQ user manual Parallel port PsimetriQ has a logic level parallel port with 8 output lines and 4 input lines, which can be used to interface with other parts of a test system or with a PLC. The parallel port can be used either as a general purpose...

  • Page 34: Sweep Results Store And Recall

    PSM1700 PsimetriQ user manual Sweep results store and recall There are 30 non-volatile storage locations that can store the results of frequency sweeps. Each location can store the sweep results for up to 50 points; larger sweeps can be stored in multiple locations:...

  • Page 35: Using Remote Control

    PSM1700 PsimetriQ user manual Using remote control PsimetriQ is fitted with an RS232 serial communications port as standard, and may have an IEEE488 (GPIB) interface or LAN interface fitted as an option. All the interfaces use the same ASCII protocol with the exception...
  • Page 36 PSM1700 PsimetriQ user manual commands that expect a reply are terminated with a question mark. PsimetriQ maintains an error status byte consistent with the requirements of the IEEE488.2 protocol (called the standard event status register) that can be read by the mandatory command *ESR? (see section 5.1).

  • Page 37: Standard Event Status Register

    PSM1700 PsimetriQ user manual Standard event status register bit 0 OPC (operation complete) cleared by most commands set when data available or sweep complete bit 2 QYE (unterminated query error) set if no message ready when data read bit 3 DDE...

  • Page 38: Serial Poll Status Byte

    PSM1700 PsimetriQ user manual Serial Poll status byte bit 0 RDV (result data available) set when results are available to be read as enabled by DAVER bit 1 SDV (sweep data available) set when sweep results are available to be...

  • Page 39: Rs232 Connections

    PSM1700 PsimetriQ user manual RS232 connections The RS232 port on PsimetriQ uses the same pinout as a standard 9 pin serial port on a PC or laptop (9-pin male ‘D’ type). Function Direction in (+ weak pull up) RX data...

  • Page 40: Data Streaming

    PSM1700 PsimetriQ user manual Data streaming The phase angle voltmeter and power meter modes have the option of high speed data streaming. In this operation, the window width for the measurement may be specified from 660us to 100ms and the data for each measurement window is transmitted over the communications in a continuous stream.

  • Page 41: System Options

    PSM1700 PsimetriQ user manual System options Press SYSTEM to access the system options. Measurements of phase can be expressed in one of three conventional formats: -180 to +180 (commonly used in circuit analysis) 0 to -360 (commonly used in power applications) 0...
  • Page 42 PSM1700 PsimetriQ user manual displayed showing the new value. This message can be disabled. The 6 main function keys, FRA, PAV, LCR, RMS, POWER, HARM, can be used to load stored configurations as a “one-touch” way of configuring the instrument for specific applications.

  • Page 43: User Data

    PSM1700 PsimetriQ user manual User data PsimetriQ can be personalised by entering up to 3 lines of user data as text (see section on text entry). User data is displayed every time that the instrument is switched on to identify the instrument. The entered text may also be read over the communications to identify the instrument (see USER?).

  • Page 44: Measurement Options

    PSM1700 PsimetriQ user manual Measurement options ACQU - Acquisition options In normal acquisition mode the window over which the measurements are computed is adjusted to give an integral number of cycles of the input waveform. The results from each window are passed through a digital filter equivalent to a first order RC low pass filter.
  • Page 45 PSM1700 PsimetriQ user manual There are two time constants for the filter, normal or slow, or the filter can be deselected. The filter applies an auto reset function to give a fast dynamic response to a change of measurement – this function can be deselected and the filter forced to operate with a fixed time constant for use with noisy signals.
  • Page 46 PSM1700 PsimetriQ user manual Fast analogue output mode suppresses the display in order to speed up the processing for analogue output update. Single measurement mode makes individual measurements in response to a trigger – manually via the keypad or *TRG over the communications. After the...

  • Page 47: Datalog

    PSM1700 PsimetriQ user manual Datalog PsimetriQ can store and display measurements recorded at regular intervals over a time period. Each data record consists of the elapsed time and up to four data values selected by ZOOM. More than 8000 records can be stored if one value is selected;...
  • Page 48 PSM1700 PsimetriQ user manual The datalog options are set up with the ACQU menu. The datalog is started with the START key, and stopped with the STOP key unless the store becomes full first. The zero reference for the elapsed time is taken as the first data measurement after START.

  • Page 49: Sweep - Frequency Sweep Options

    PSM1700 PsimetriQ user manual SWEEP - Frequency sweep options All ac measurements using the PsimetriQ generator can be swept across a frequency range. The start frequency, stop frequency and number of steps up to 2000 can be specified. The measurements are subjected to the same speed constraints set in the ACQU menu, but the filtering does not apply on each measurement point.
  • Page 50 PSM1700 PsimetriQ user manual 4. Perform a sweep with the part to be compared. Each frequency point is an entirely new measurement and autoranging is restarted (if enabled). For the fastest possible sweeps, select manual ranging. As each frequency point is a new measurement, filtering has no effect on a...

  • Page 51: Trim - Trim Function

    PSM1700 PsimetriQ user manual TRIM - Trim function The trim function on PsimetriQ is a powerful and versatile feature that allows closed loop control of the generator amplitude. It allows a specific measurement to be programmed for either CH1 and CH2 and the generator output will be adjusted to maintain the measured voltage or current.

  • Page 52: Output Control

    PSM1700 PsimetriQ user manual Output control The output for the signal generator is digitally synthesised at an update rate of 11.52Msamples/s. This gives very good sinewave waveform, even at 1MHz, while preserving very accurate frequency control. Output filtering removes the stepped effect of the sampling.

  • Page 53: Generator Specifications

    PSM1700 PsimetriQ user manual Generator specifications General accuracy frequency 0.05% amplitude 5% (to 100kHz) accuracy (with amplitude 1% (to 1MHz) trim) output impedance 50 2% output voltage 10V peak offset 10V peak maximum waveforms sine, triangle, square, sawtooth frequency 10uHz to 1MHz...

  • Page 54: Input Channels

    PSM1700 PsimetriQ user manual Input channels The two input channels are differentially isolated from each other and from earth, and are controlled independently but sampled synchronously. Each input channel may be selected to be: disabled voltage external shunt If the external shunt option is selected, the data is scaled by the shunt value (entered under the relevant channel menu) and the units are displayed in Amps.
  • Page 55 PSM1700 PsimetriQ user manual range reference nominal full scale 10mV 10mV 30mV 31.6mV 100mV 100mV 300mV 316mV 3.16V 31.6V 100V 100V The ranges may be selected manually, or by autoranging (default). The start range for autoranging may be selected if it is known that the signal will not be below a certain level.
  • Page 56 PSM1700 PsimetriQ user manual manual ranging. Manual ranging (or up-only autoranging) is essential for low frequency measurements. For measuring signals that are biased on a dc level (such as an amplifier operating on a single supply or the output of a dc PSU), ac coupling can be used. AC+DC coupling is the normal option and should be used where possible.

  • Page 57: Trimming X10 Oscilloscope Probes

    PSM1700 PsimetriQ user manual Trimming x10 oscilloscope probes To use a x10 oscilloscope probe at high frequency the probe needs to be trimmed to match the input capacitance of the instrument. A small plastic screwdriver is provided with each probe for this purpose.

  • Page 58: 10 True Rms Voltmeter

    PSM1700 PsimetriQ user manual 10 True RMS Voltmeter The RMS voltmeter measures the total rms of the signal present at the input terminals to the bandwidth of the instrument (>1MHz). Care must be taken when measuring low signal levels to minimise noise pick on the input leads.
  • Page 59 PSM1700 PsimetriQ user manual The dc present is given by: 2  dc = 1/2 v() d For a sampled signal, the formula becomes: i = n-1  dc = 1/n v[i] i = 0 where n is the number of samples for an integral number of complete cycles of the input waveform.
  • Page 60 PSM1700 PsimetriQ user manual important that PsimetriQ does autorange while measuring surge – either set the range to manual or repeat the test with ranging set to up only. To reset the maximum, press START. Crest factor is derived from the peak and rms:...

  • Page 61: Rms Voltmeter Specification

    PSM1700 PsimetriQ user manual 10.1 RMS voltmeter specification channels 2 differential display 5 digits measurement true rms, ac, dc, dBm, peak, cf, surge coupling ac or ac+dc frequency dc to >1MHz (ac+dc coupling) ac coupling cut off ~1.5Hz (–3dB) max input 100V peak, 50V rms...

  • Page 62: 11 Frequency Response Analyser

    PSM1700 PsimetriQ user manual 11 Frequency response analyser PsimetriQ measures the gain and phase of channel 2 relative to channel 1 using a discrete Fourier transform (DFT) algorithm at the fundamental frequency. The DFT technique can measure phase as well as magnitude and is inherently good at rejecting noise –...
  • Page 63 PSM1700 PsimetriQ user manual For a sampled signal, the formulae become: i = n-1  = 1/n v[i].cos(2ci/n) i = 0 i = n-1  = 1/n v[i].sin(2ci/n) i = 0 where n is the number of samples for an integral number of complete cycles of the input waveform, and c is the number of cycles.
  • Page 64 PSM1700 PsimetriQ user manual delay = periodic time x measured phase / 360 To look at differences in gain from a nominal value, an offset gain can be applied either manually or by pressing ZERO. offset gain = measured dB – offset dB...
  • Page 65 PSM1700 PsimetriQ user manual input waveform. In real time mode the results from each window are passed through a digital filter equivalent to a first order RC low pass filter; in sweep mode each result comprises a single window without any filtering unless repeat sweep is selected.

  • Page 66: Frequency Response Analyser Specification

    PSM1700 PsimetriQ user manual 11.1 Frequency response analyser specification Frequency response (gain/phase) analyser frequency 10uHz to1MHz (own generator) 20mHz to 500kHz (external source) max input 100V peak 50Vrms input ranges 100V, 30V, 10V, 3V, 1V, 300mV, 100mV, 30mV, 10mV ranging...

  • Page 67: Phase Angle Voltmeter (Vector Voltmeter)

    PSM1700 PsimetriQ user manual 12 Phase angle voltmeter (vector voltmeter) A phase angle voltmeter (or vector voltmeter, or phase sensitive voltmeter) measures the signal at one input compared to the phase of the signal at a reference input. The results may be expressed as magnitude and phase, or as separate in-phase and quadrature components.
  • Page 68 PSM1700 PsimetriQ user manual A null meter display may be selected via the PAV menu to allow adjustment of a circuit for minimum phase or component. The parameter on the display depends on the selected component: parameter display null meter...
  • Page 69 PSM1700 PsimetriQ user manual PsimetriQ computes a multiplying factor that it applies to the start frequency for the specified number of steps. Note that due to compound multiplication it is unlikely that the end frequency will be exactly that programmed. The...

  • Page 70: Phase Angle Voltmeter Specification

    PSM1700 PsimetriQ user manual 12.1 Phase angle voltmeter specification Phase angle voltmeter (vector voltmeter) frequency 10uHz to1MHz (own generator) 20mHz to 500kHz (external source) measurement type DFT analysis, and true rms measurements magnitude, phase, A & B components, B/A, A2/A1, LVDT (diff), LVDT (ratio),...

  • Page 71: 13 Power Meter

    PSM1700 PsimetriQ user manual 13 Power meter power meter measures total power fundamental power of the signal present at the input terminals to the bandwidth of the instrument (>1MHz). One of the inputs must be configured as an external shunt input.
  • Page 72 PSM1700 PsimetriQ user manual When the integrator function is activated, the following values are available: Elapsed time (in hours, minutes and seconds) Watt-hours (true and fundamental) VA hours (true and fundamental) average power factor (true and fundamental) Ampere hours (true and fundamental) The power dissipated in a load subjected to a periodic voltage, v(), with a current flowing a(), is given by:...
  • Page 73 PSM1700 PsimetriQ user manual harmonic Watts = VH x AH + VH x AH real real quad quad fundamental VA fund fund fund power factor / VA fund fund In power meter mode, the UP and DOWN key do not adjust the amplitude but step the harmonic number.

  • Page 74: Power Meter Specification

    PSM1700 PsimetriQ user manual 13.1 Power meter specification Power meter current input external shunt display 5 digits measurement W, VA, PF, fundamental, rms, phase coupling ac or ac+dc frequency dc to > 1MHz 20mHz to 500kHz (fundamentals) ac coupling cut off ~1.5Hz (–3dB) max input 100V peak 50V rms...

  • Page 75: 14 Lcr Meter

    PSM1700 PsimetriQ user manual 14 LCR meter In LCR meter mode, channel 1 measures the voltage across the component under test, and channel 2 measures the current through it. To measure the current, channel 2 must be connected across an appropriate external shunt.
  • Page 76 PSM1700 PsimetriQ user manual For “shunt” connection, shown above, the current is measured directly across the shunt using CH2 while the voltage across the Zx is measured by CH1. Notice that the positive inputs to both CH1 and CH2 are connected to the midpoint to minimise common mode loading effects.
  • Page 77 PSM1700 PsimetriQ user manual PsimetriQ measures the real and imaginary components at fundamental frequency using analysis described in the section on gain/phase analysis. The frequency may be taken from its own generator or from the circuitry under test. From the fundamental components of voltage, (a + jb),...
  • Page 78 PSM1700 PsimetriQ user manual If the parameter option in LCR menu is set to ‘auto’, PsimetriQ will display capacitance or inductance according to the phase of the measurement. Alternatively, the display can be forced to capacitance, inductance or impedance. Capacitance is displayed with tan, inductance is displayed with Q factor, and impedance is displayed in its resistive + reactive form and as magnitude.
  • Page 79 PSM1700 PsimetriQ user manual and select “phase adjust”. PsimetriQ then applies a compensating vector rotation subsequent measurements. PsimetriQ can operate either in real time mode at a single frequency where the measurements are filtered and updated on the display; or it can sweep a range of frequencies and present the results as a table or graphs.
  • Page 80 PSM1700 PsimetriQ user manual The ZOOM function can be used to select up to four parameters from the display when in real time mode. It has no function following a sweep. Although it is most usual to use the PsimetriQ generator...

  • Page 81: Lcr Meter Specification

    PSM1700 PsimetriQ user manual 14.1 LCR meter specification LCR meter frequency 10uHz to 1MHz (own generator) 20mHz to 500kHz (external source) measurement type DFT analysis measurements L, C, R (ac), Q, tan, impedance, phase, admittance series or parallel circuit conditions...

  • Page 82: 15 Harmonic Analyser

    PSM1700 PsimetriQ user manual 15 Harmonic analyser The PsimetriQ harmonic analyser computes multiple DFTs on the input waveforms in real time (refer to the chapter on frequency response analysis for the formulae for DFT analysis). There are three modes of operation: single harmonic, difference thd, and series thd.
  • Page 83 PSM1700 PsimetriQ user manual The single harmonic and the thd are expressed relative to the fundamental either as a percentage or in dB, as selected via the HARM menu. PsimetriQ can operate either in real time mode at a single frequency where the measurements are filtered and updated on the display;...
  • Page 84 PSM1700 PsimetriQ user manual Although it is most usual to use the PsimetriQ generator when making harmonic measurements, there may be circumstances where this is impractical, for example measuring harmonic currents drawn from the mains. In this case, turn off the PsimetriQ generator (OUT menu) and the frequency reference for the analysis is measured from channel 1.

  • Page 85: Harmonic Analyser Specification

    PSM1700 PsimetriQ user manual 15.1 Harmonic analyser specification Harmonic analyser fundamental 100uHz to 500kHz (own generator) frequency 20mHz to 500kHz (external source) harmonic 10uHz to 1MHz frequency measurement type multiple DFT analysis measurements single harmonic, differential thd, thd by series of harmonics...

  • Page 86: 16 Transformer Analyser

    PSM1700 PsimetriQ user manual 16 Transformer analyser The transformer analyser mode allows a comprehensive set of measurements to be performed on a transformer at a single frequency or automatically swept over a range of frequencies. The tests available are: turns ratio...
  • Page 87 PSM1700 PsimetriQ user manual The operating conditions for the component under test may be selected manually or for some tests (such as turns ratio) PsimetriQ will automatically try to find appropriate conditions. PsimetriQ can operate either in real time mode at a single frequency where the measurements are filtered and updated on the display;...
  • Page 88 PSM1700 PsimetriQ user manual 16.1 Turns ratio Turns ratio is computed from the real part of the complex ratio of CH2 divided by CH1 using DFT analysis at the fundamental frequency (refer to the chapter on gain/phase analysis for the formulae for DFT analysis). This technique gives good results even on ‘lossy’...

  • Page 89: Inductance & Leakage Inductance

    PSM1700 PsimetriQ user manual 16.2 Inductance & leakage inductance The inductance of a winding is computed from the complex ratio of CH1 (voltage across the winding) divided by CH2 (current through the winding) using DFT analysis at the fundamental frequency (refer to the chapter on gain/phase analysis for the formulae for DFT analysis).

  • Page 90: Ac Resistance And Q Factor

    PSM1700 PsimetriQ user manual 16.3 AC resistance and Q factor AC resistance is measured the same way as inductance with CH1 monitoring the voltage across the winding, and CH2 monitoring the current through it via the external shunt (source resistance).

  • Page 91: Interwinding Capacitance

    PSM1700 PsimetriQ user manual 16.5 Interwinding capacitance The interwinding capacitance of a transformer is computed from the complex ratio of CH1 (voltage across the transformer) divided (current through transformer) using DFT analysis at the fundamental frequency (refer to the chapter on gain/phase analysis for the formulae for DFT analysis).

  • Page 92: Magnetising Current

    PSM1700 PsimetriQ user manual 16.6 Magnetising current The magnetising current is the current drawn by the primary, energised under normal operating conditions but without any secondary load. It is typically measured on power transformers rather than signal transformers so although the transformer analyser fixture, TAF01, will...

  • Page 93: Return Loss

    PSM1700 PsimetriQ user manual 16.7 Return loss Return loss is a measure of impedance mismatch in signal transformers that are terminated with the design load resistance. The secondary winding is terminated with the appropriate load resistance and the primary is energised via a source...

  • Page 94: Insertion Loss

    PSM1700 PsimetriQ user manual 16.8 Insertion loss Insertion loss is a measure of power loss due to impedance mismatch in signal transformers that are terminated with the design load resistance. The secondary winding is terminated with the appropriate load resistance and the primary is energised via a source...
  • Page 95 PSM1700 PsimetriQ user manual output and CH1 input across the series combination of the source resistance and the primary winding. Connect the appropriate load resistance and Ch2 input across the secondary. When using transformer analyser fixture, connections for insertion loss are made automatically by relays.

  • Page 96: Harmonics And Distortion

    PSM1700 PsimetriQ user manual 16.9 Harmonics and distortion Harmonic distortion introduced by a signal transformer may be measured either at a single spot harmonic or as the thd computed from a series of harmonics. The primary of the transformer is energised either by the output of PsimetriQ or by external means and CH2 is connected across the secondary.

  • Page 97: Longitudinal Balance

    PSM1700 PsimetriQ user manual 16.10 Longitudinal balance Longitudinal balance is a measure of the common mode rejection ratio, CMRR, of the transformer. Longitudinal balance requires external circuitry to give the required accuracy – a plug in module is available for the...
  • Page 98 PSM1700 PsimetriQ user manual Transformer analyser specification Transformer analyser frequency 10uHz to 1MHz (own generator) 20mHz to 500kHz (external source) measurement type DFT analysis, true rms as appropriate measurements turns ratio turns inductance leakage inductance ac resistance dc resistance interwinding capacitance...
  • Page 99 PSM1700 PsimetriQ user manual Appendix A – Accessories ACCESSORIES...
  • Page 100 PSM1700 PsimetriQ user manual Power meter adaptors The power meter adaptors allow easy and safe connection of the PsimetriQ to a mains appliance under test to measure the power or harmonics. The appliance under test plugs into an IEC mains outlet on...
  • Page 101 PSM1700 PsimetriQ user manual 75 / 600 output adapter The generator output from the PsimetriQ has a series impedance of 50. The output adapter fits directly onto the front of the instrument and provides 2 outputs: 75 via a BNC connector 600...
  • Page 102 PSM1700 PsimetriQ user manual LCR active head The PsimetriQ LCR active head fits onto the front of the instrument, making connection to the output and the two inputs, to provide four BNC connections for use with Kelvin leads to connect to the component under test.
  • Page 103 PSM1700 PsimetriQ user manual Transformer analyser fixture, TAF01 The transformer analyser fixture TAF01 consists of a relay switching base unit that accepts plug in module to interface to transformers. It connects to the BNC connectors on the front of PsimetriQ and is controlled by PsimetriQ via the extension port.
  • Page 104 PSM1700 PsimetriQ user manual Transformer analyser fixture, TAF02 This fixture is no longer available. However the facility is still available on the instrument for users who already have one. Whilst TAF02 can’t be directly selected in the AUX menu, Config,122,3 can be used to set the fixture option in the AUX menu to TAF02.
  • Page 105 PSM1700 PsimetriQ user manual CommVIEW PC software CommVIEW is a self contained software program for a PC, which facilitates communication with PsimetriQ over RS232. CommVIEW allows strings to be sent and received between a PC and PsimetriQ. The strings can be viewed in a window and optionally stored in a file.
  • Page 106 PSM1700 PsimetriQ user manual Appendix B – Serial command summary command format reply format *CLS *ESE,value *ESE? single integer data value *ESR? single integer data value *IDN? company,product,serial no,version *OPC? 0 or 1 *RST *SRE,value single integer data value *SRE?
  • Page 107 PSM1700 PsimetriQ user manual GAINPH GAINPH? freq,mag1,mag2,dB,phase GAINPH,SWEEP? n lines of GAINPH? data HARMON,scan,para,h,hmax HARMON? freq,mag1,mag2,hmag1,hmag2,h1,h2 freq,mag1,mag2,thd1,thd2,h1,h2 HARMON,SWEEP? n lines of HARMON? data HARMON,SERIES? mag1,%1,1,mag2,%2,2 1 line for each harmonic HOLD,on/off INPUT,channel,type INPUT,channel? single integer data value KEYBOA,value LCR,conditions,param,head LCR?
  • Page 108 PSM1700 PsimetriQ user manual RANGE,ch,ranging,range RESOLU.format REZERO SCALE,channel,factor SCALE,channel? single real data value SHUNT,channel,resistance SHUNT,channel? single real data value SINGLE,on/off SPEED,speed SSWEEP,function,number START STATUS,channel? range number,range text,over/low/ok STOP STREAM,enable,window STREAM,disable STREAM? data, data, data, data, data, ….. SUSPEND,on/off TFA? freq,mag1,mag2,dB,phase...

  • Page 109: Calibration Commands

    PSM1700 PsimetriQ user manual calibration commands CALAPP CALCOM,freq CALFIL,index,value CALFIL? six real data values CALFRQ,index,freq CALFRQ? seven real data values CALIBR,index,value CALIBR? single integer data value CALPHA,index CALRES CALSAV,password CALSNO,serial number CALSTR,string CALSTR? string...
  • Page 110 PSM1700 PsimetriQ user manual Appendix C – Available character set The following characters can be selected in text entry mode. The table is to be read across then down (eg, starting at space and repeatedly pressing NEXT gives ! “ # $ % & ‘ ( ) * etc.)
  • Page 111 PSM1700 PsimetriQ user manual Appendix D – Configurable parameters All parameters can be accessed using the CONFIG command: CONFIG,parameter? CONFIG,parameter,data Number Function System parameters operating mode autozero manual or auto blanking disable phase convention main output on/off line drawing on/off...
  • Page 112 PSM1700 PsimetriQ user manual filter channel 2 scale factor channel 1 scale factor channel 2 external shunt channel 1 external shunt channel 2 General parameters 5/6 digit resolution phase reference Display parameters zoom level function zoomed on 1 function zoomed on 2...
  • Page 113 PSM1700 PsimetriQ user manual integration type Streaming parameters data streaming data streaming window size Harmonic analyser parameters mode selected harmonic maximum harmonic computation LCR sweep zero parameters sweep compensation compensation start frequency compensation stop frequency compensation steps System parameters dBm level control...
  • Page 114 PSM1700 PsimetriQ user manual series/parallel sweep graph option active head control impedance lin/log phase adjust value reference impedance reference type gain/phase analyser parameters phase or delay time selection dB offset gain/phase margin enable ratio selection System parameters minimum number of cycles...
  • Page 115 PSM1700 PsimetriQ user manual graph 2 maximum graph 2 minimum Phase angle voltmeter parameters computation LVDT scaling manual null meter ranging null maximum phase offset Trim parameters ac trim enable ac trim level trim tolerance Graph parameters log/linear sweep graph 1 manual/auto...
  • Page 116 At Newtons4th Ltd. we have a policy of continuous product improvement and are always keen to hear comments, whether favourable or unfavourable, from users of our products. An example comment form can be found at the end of this manual –...
  • Page 117 PSM1700 PSIMETRIQ comments serial main release: date: number: dsp release: fpga release: boot release: (press SYS then LEFT) your contact details: comments: detailed description of application or circumstances: Please post or fax to Newtons4th Ltd.

Table of Contents