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OPERATION

29

Crest Factor Table

Crest factor is the ratio of the peak signal amplitude to the RMS
value of the signal. It determines the accuracy of AC measurement.
If the crest factor is less than 3.0, voltage measurement will not
result in error due to dynamic range limitations at full scale.
If the crest factor is more than 3.0, it usually indicates an abnormal
waveform as seen from the below table.

Waveform

Shape

Crest factor

Square wave

1.0

Sine wave

1.414

Triangle sawtooth

1.732

Mixed frequencies

1.414 ~ 2.0

SCR output 100% ~

10%

1.414 ~ 3.0

White noise

3.0 ~ 4.0

AC Coupled pulse train

>3.0

Spike

>9.0

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Содержание PCS-1000

Страница 1: ...Precision Current Shunt Meter PCS 1000 USER MANUAL GW INSTEK PART NO 82CS 1K000EB1 ISO 9001 CERTIFIED MANUFACTURER 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...

Страница 2: ...r language without prior written consent of Good Will company The information in this manual was correct at the time of printing However Good Will continues to improve products and reserves the rights...

Страница 3: ...ATION 18 Set Up 19 Basic Operation 25 COMMUNICATION INTERFACE 42 Interface Configuration 44 Command Syntax 56 Command List 59 Status Registers 86 Error Messages 87 APPENDIX 88 PCS Default Settings 88...

Страница 4: ...s manual or on the instrument WARNING Warning Identifies conditions or practices that could result in injury or loss of life CAUTION Caution Identifies conditions or practices that could result in dam...

Страница 5: ...med at the source of low voltage installation Measurement category III is for measurement performed in the building installation Measurement category II is for measurement performed on the circuits di...

Страница 6: ...llution degree 2 Normally only non conductive pollution occurs Occasionally however a temporary conductivity caused by condensation must be expected Pollution degree 3 Conductive pollution occurs or d...

Страница 7: ...ected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or...

Страница 8: ...GETTING STARTED This chapter describes the instrument in a nutshell including its main features and front rear panel introduction PCS 1000 Overview 9 Main Features 9 Accessories 10 Appearance 11 Front...

Страница 9: ...f 300A 30A 3A 300mA and 30mA respectively Main Features Performance Wide DC AC voltage range 200mV 600VAC 1000VDC Wide AC DC current range 30mA 300A Low drift at all ranges Low temperature coefficient...

Страница 10: ...tor clip test leads 3A max 1x red 1x black GTL 207 Banana plug test leads 1x red 1x black GTL 240 USB Cable PCS 001 Basic Accessory Kit Bolt HMS M8 16 x2 Nut hexagon M8 0 75P x2 Spring washer M8 8 4 1...

Страница 11: ...ent Monitor 3A MAX 30A MAX DCA 300A ERROR CAT II 600V Func Select Auto Enter No Fuse Fused POWER INPUT INPUT OUTPUT INPUT 1 6 9 14 2 3 5 4 15 12 13 7 8 10 11 1 Power Switch POWER Turn on or off the ma...

Страница 12: ...tek service center to replace the fuse Warning The maximum voltage difference between the negative terminal and earth cannot exceed 500Vpeak 4 Current Monitor Sensor Current Monitor OUTPUT Current Mon...

Страница 13: ...Function menu 8 AC DC Current Func Func AC DC Local Selects DC or AC current measurement 9 300A 30A Select Auto 3A Range 300A 30A Manually select the 300A or 30A measurement range 10 Select Auto 3A R...

Страница 14: ...Function menu Auto long push Voltage auto range 14 Current Meter RMT ACA 30A Auto mA A CURRENT DCA 300A ERROR Displays current measurement RMT The RMT icon will turn on when the instrument is in remo...

Страница 15: ...Indicates an interface error The SYSTem ERRor query can be used to read back error messages See page 87 and 74 for details ACV AC voltage measurement mode indicator DCV DC voltage measurement mode ind...

Страница 16: ...SE INPUT T100mA NO FUSE 17 18 16 20 19 16 Power Cord Socket Fuse Socket 100 220 120 240 Accepts the power cord Input AC 100 120 220 240V 10 Line frequency 50Hz 60Hz Power 35VA Max Fuse rating T200mA 2...

Страница 17: ...GETTING STARTED 17 19 AC DC 300A Terminal 300A MAX INPUT NO FUSE Accepts AC DC 300A maximum current input 20 Fan Temperature controlled fan...

Страница 18: ...ecting the Voltage Range 27 Voltage Range Conversion Table 28 Crest Factor Table 29 Using the Current Monitor Output 30 How to Use the Function Menu 31 View the Software Version 33 Default Settings 34...

Страница 19: ...A CURRENT ACV DCV Auto mV V VOLTAGE DCA 300A ERROR Note In the event the calibration data and ROM check fails CAL DATA FAIL will be displayed on the screen as shown below If the calibration data and...

Страница 20: ...The PCS 1000 has two types of the racks GRA 419 E and the GRA 419 J for the EIA and JIS standards respectively Both types of the racks are 2U height racks and can fit 1 or 2 units See the GRA 419 ass...

Страница 21: ...ed the maximum current input for the selected range Recommended wire gauge Wire Gauge AWG Nominal Cross Section mm2 Maximum Current A 20 0 5 9 18 1 13 16 1 5 18 14 2 5 24 12 4 34 10 6 45 8 10 64 6 16...

Страница 22: ...a plugs The 3A input terminal uses standard banana plugs GW Instek part number GTL 105A The 3A terminal supports 3A 30mA and 300mA ranges WARNING Ensure any current or voltage sources are disabled bef...

Страница 23: ...OPERATION 23 Current Meter Connection Load Power Source current input current input Voltage Meter Connection Load Power Source voltage input voltage input...

Страница 24: ...ltage Current Meter Connection Load Power Source V V A A 1 2 3 1 2 3 Measure voltage at load terminal Measure voltage at source terminal Measure current Current Monitor DVM current monitor current mon...

Страница 25: ...DCA 300A ERROR Selecting the Current Range Background There are 5 selectable current ranges The range can be manually or automatically selected Selecting a current range will also select the correspo...

Страница 26: ...autorange function is only applicable for the 3A 30mA and 300mA ranges Autorange is not supported for the 30A and 300A ranges RMT ACA 30A Auto mA A CURRENT ACV DCV Auto mV V VOLTAGE DCA 300A ERROR Not...

Страница 27: ...icated by the displayed unit V or mV and the number of significant digits before the decimal place 200mV Unit mV 3 significant digits 2V Unit V 1 significant digit 20V Unit V 2 significant digits 200V...

Страница 28: ...Waveform Peak to Peak AC True RMS DC Sine PK PK 2 828 1 000 0 000 Rectified Sine full wave PK PK 1 414 0 435 0 900 Rectified Sine half wave PK PK 2 000 0 771 0 636 Square PK PK 2 000 1 000 0 000 Recti...

Страница 29: ...0 voltage measurement will not result in error due to dynamic range limitations at full scale If the crest factor is more than 3 0 it usually indicates an abnormal waveform as seen from the below tabl...

Страница 30: ...A 10 300 mA 1 3 A 0 1 30 A 0 01 300 A 0 001 Steps 1 Set the PCS 1000 for normal operation as described previously in this chapter page 25 27 Make note of the range used and the shunt that is used for...

Страница 31: ...d the default settings USB to Serial Port Baud Rate 115200 57600 38400 19200 9600 4800 GPIB Address 00 30 AD Speed measurement resolution 7_sec 6 digits 30_sec 5 digits 100_sec 4 digits AVG Mode SHIFT...

Страница 32: ...s the Enter key to set the parameter and go to the next menu item Enter Auto Range Save Setup To save the settings use the Func keys to navigate to SAVE FUNC SET Press the Enter key to save all the se...

Страница 33: ...iew the Software Version Background The display will show the software version Display RMT ACA 30A Auto mA A CURRENT ACV DCV Auto mV V VOLTAGE DCA 300A ERROR Steps Long push the Func key The software...

Страница 34: ...ory Default function will restore the default settings Steps 1 Long push the Func key The function menu will appear 1 Use the Func keys to navigate to the FACTORY DEFAULT menu 2 Press the Enter key to...

Страница 35: ...trol Note The USB driver needs to be installed for the baud rate settings to be applicable See page 48 for details Steps 1 Long push the Func key The function menu will appear 2 Use the Func keys to n...

Страница 36: ...ps 1 Long push the Func key The function menu will appear 2 Use the Func keys to navigate to the ADDRESS settings 3 Use the Select keys to select the GPIB address Press the Enter key to set the addres...

Страница 37: ...key The function menu will appear 2 Use the Func keys to navigate to the AD SPEED menu 3 Use the Select keys to select the AD speed Press the Enter key to set the speed By default the AD Speed is set...

Страница 38: ...push the Func key The function menu will appear 2 Use the Func keys to navigate to the AVG MODE menu 3 Use the Select keys to select the Averaging Mode Press the Enter key to set the mode By default...

Страница 39: ...l appear 2 Use the Func keys to navigate to the DCV AVG ACV AVG DCA AVG or ACA AVG menu 3 Use the Select keys to select the number of averages for the selected mode Press the Enter key to set the mode...

Страница 40: ...menu will appear 2 Use the Func keys to navigate to the AUTOZERO menu 3 Use the Select keys to enable autozero Press the Enter key to set the mode By default the Autozero is already enabled 4 Use the...

Страница 41: ...appear 2 Use the Func keys to navigate to the BEEPER menu 3 Use the Select keys to the beeper on or off Press the Enter key to set the mode By default the beeper sound is turned on 4 Use the Func key...

Страница 42: ...Interface Settings 50 USB Function Check 53 Return to Local Operation 55 Command Syntax 56 Command List 59 Configure Commands 61 CONFigure 61 CONFigure CURRent 62 CONFigure CURRent DC 62 CONFigure CU...

Страница 43: ...TATe 73 SYSTem ERRor 74 SYSTem LOCal 74 SYSTem REMote 75 SYSTem RWLock 75 SYSTem VERSion 75 SYSTem OUTPut FORMat 75 Status Commands 77 STATus OPERation CONDition 77 STATus OPERation ENABle 78 STATus O...

Страница 44: ...r the function menu Page 31 4 Use the Func keys to go to the ADDRESS function 5 Select the address using the Select keys GPIB Address 00 30 6 Press the Enter key to confirm the selection Note RMT will...

Страница 45: ...program is available on the NI website www ni com via a search for the VISA Run time Engine page or downloads at the following URL http www ni com visa Requirements Operating System Windows XP 7 8 Fun...

Страница 46: ...46 1 From the Configuration panel access My System Devices and Interfaces GPIBX where X is the GPIB card number that is connected to the PCS 1000 2 Click Scan for Instruments 3 Double click on the Ins...

Страница 47: ...unicator window that appears ensure IDN is written in the Send test box 6 Click on the Query button to send the IDN query to the instrument 7 The following string should be returned GWInstek PCS 1000...

Страница 48: ...updated it may be necessary to install the USB driver as shown below Requirements Operating System Windows XP Vista 7 8 8 1 Note The following installation instructions only apply if the USB driver d...

Страница 49: ...the Found New Hardware wizard does not appear or you wish to install the driver from another location the driver can be also installed from the Windows Device Manager 1 Open the Windows Device Manage...

Страница 50: ...PORTS COM LPT Note If required the USB drivers can be downloaded from http www ftdichip com Drivers VCP htm If the drivers are downloaded they can be installed using the Alternate Installation method...

Страница 51: ...the PCS 1000 to the PC using the GTL 240 USB cable 2 Open the Windows Device Manager using Windows 7 click Start Control Panel Hardware and Sound Device Manager 3 In the device tree go to PORTS COM L...

Страница 52: ...PCS 1000 User Manual 52...

Страница 53: ...URL http www ni com visa Requirements Operating System Windows XP 7 8 8 1 Functionality check 1 Open the Windows Device Manager to see which COM port the PCS has been assigned Using Windows 7 press S...

Страница 54: ...ystem Devices and Interfaces Serial Parallel COMX where X is the COM port number assigned to the PCS 1000 4 Click on the Port Settings tab at the bottom 5 Make sure the Baud rate settings are correct...

Страница 55: ...the Query button to send the IDN query to the instrument 10 The following string should be returned GWInstek PCS 1000 xxxxxxxxx Vx xx Manufacturer model serial software version 7 9 8 10 Return to Loca...

Страница 56: ...esents each node in the command tree Each keyword node of a SCPI command is separated by a colon For example the diagram below shows an SCPI sub structure and a command example MEASure CURRent MEASure...

Страница 57: ...ore commands on the same command line Compound commands are separated with either a semi colon or a semi colon and a colon A semi colon is used to join two related commands with the caveat that the la...

Страница 58: ...are examples of correctly written commands Long form CONFigure VOLTage CONFIGURE VOLTAGE configure voltage Short form CONF VOLT conf volt Square Brackets Commands that contain square brackets indicate...

Страница 59: ...List Configure Commands CONFigure 61 CONFigure CURRent 62 CONFigure CURRent DC 62 CONFigure CURRent AC 63 CONFigure VOLTage 63 CONFigure VOLTage DC 64 CONFigure VOLTage AC 65 CONFigure AVERage MODE 65...

Страница 60: ...VERSion 75 SYSTem OUTPut FORMat 75 Status Commands STATus OPERation CONDition 77 STATus OPERation ENABle 78 STATus OPERation EVENt 78 STATus PRESet 79 STATus QUEStionable CONDition 79 STATus QUEStiona...

Страница 61: ...y Description The CONFigure query will return both the current and voltage configuration as a string Query Syntax CONFigure Return Parameter string Current mode range unit voltage mode range unit Quer...

Страница 62: ...ase unit See the table below Unit Current Range 100 300A 10 30A 1 3A 0 1 300mA 0 01 30mA CONFigure CURRent DC Set Description This command will set the current mode to DC and set the range If the rang...

Страница 63: ...Current range NRf 0 00000001 305 Current range The unit will automatically be set to the closest range AUTO Autorange Only applicable for the 3A ranges Autorange is not supported for the 30A and 300A...

Страница 64: ...LTage DC Set Description This command will set the voltage mode to DC and set the DCV range If the range is not specified then it will not be changed Syntax CONFigure VOLTage DC Range AUTO Parameter R...

Страница 65: ...he closest range AUTO Autoset Example CONF VOLT AC 20 Sets the voltage mode to AC and the ACV range to 20V Example CONF VOLT AC Sets the voltage mode to AC The range stays the same CONFigure AVERage M...

Страница 66: ...x MEASure Return Parameter NRf Returns the current measurement voltage measurement current voltage Query Example MEAS 9 9768E 1 3 21E 1 Returns the current measurement 0 99A and voltage 0 321V measure...

Страница 67: ...his query will return the DC voltage Query Syntax MEASure VOLTage DC Return Parameter NRf Returns the DC voltage Query Example MEAS VOLT DC 1 5E 1 Returns the DC voltage measurement 15 0 V MEASure VOL...

Страница 68: ...000 User Manual 68 Query Syntax READ Return Parameter NRf Returns the current and voltage readings respectively current voltage Query Example READ 9 9067E 1 2 5E 1 Returns the current and voltage read...

Страница 69: ...x SENSe CURRent RANGe Range AUTO SENSe CURRent RANGe Parameter Return Parameter Range Current range NRf 0 00000001 305 Sets the current range in amps The unit will automatically choose the closest ran...

Страница 70: ...average count setting for DC current is 10 SENSe CURRent AC AVERage COUNt Set Query Description This query will set or return average count setting for AC current Syntax Query Syntax SENSe CURRent AC...

Страница 71: ...eturned is the base voltage unit See the table below Unit Voltage Range 1000 1000VDC 600 600ACV 100 200V 10 20V 1 2V 0 1 200mV SENSe VOLTage DC AVERage COUNt Set Query Description This command will se...

Страница 72: ...n the average count setting for AC current Syntax Query Syntax SENSe VOLTage AC AVERage COUNt NR1 SENSe VOLTage AC AVERage COUNt Return Parameter NR1 The average count setting for AC voltage 1 10 20 3...

Страница 73: ...Mote 75 SYSTem RWLock 75 SYSTem VERSion 75 SYSTem OUTPut FORMat 75 SYSTem BEEPer STATe Set Query Description Sets or queries the beeper status Syntax Query Syntax SYSTem BEEPer STATe 0 1 SYSTem BEEPer...

Страница 74: ...d If the error queue is full 20 messages and an error occurs the last stored error message will be overwritten with the 350 Error queue overflow message This message will remain and no additional mess...

Страница 75: ...ption Queries the SCPI version number Query Syntax SYSTem VERSion Return Parameter string Returns the SCPI version as a string Query Example SYST VERS 1999 0 Returns the SCPI version number as 1999 0...

Страница 76: ...C 2 Returns the output in NR2 format 0 00000000 0 0000004 3 Returns the output in NR2 format unit 0 00000000 ADC 0 0000004 VDC Syntax Query Syntax SYSTem OUTPut FORMat 0 3 SYSTem OUTPut FORMat Paramet...

Страница 77: ...OPERation CONDition Query Description Returns the contents of the Standard Operation Condition Register Bit Bit weight Description 0 1 Calibrating 1 3 Not used 4 16 Measuring 5 7 Not used 8 256 Config...

Страница 78: ...Return Parameter NR1 0 65535 Indicates the bit weight of the Standard Operation Enable Register Query Example STAT OPER ENAB 273 Enables bit 0 4 and 8 of the Standard Operation Enable Register STATus...

Страница 79: ...their default state Syntax STATus PRESet STATus QUEStionable CONDition Query Description Returns the contents of the Questionable Data Condition Register Bit Bit weight Description 0 1 Volt Overload 1...

Страница 80: ...535 Indicates the bit weight of the Questionable Data Enable Register Query Example STAT QUES ENAB 3 Enables bit 1and 2 of the Questionable Data Enable Register STATus QUEStionable EVENt Query Descrip...

Страница 81: ...umber serial number and software version number Query Syntax IDN Query Example IDN GWInstek PCS 1000 xxxxxxxxx Vx xx ESE Set Query Description Returns or sets the contents of the Standard Event Enable...

Страница 82: ...ster Bit Bit weight Description 0 1 Operation Complete 1 2 Not used 2 4 Query Error 3 8 Device Error 4 16 Execution Error 5 32 Command Error 6 64 Not used 7 128 Power On Query Syntax ESR Parameter NR1...

Страница 83: ...Query Example SRE 188 Indicates that bits 2 3 4 5 and 7 are enabled STB Query Description Queries the Status Byte Register Bit Summary Bit Bit weight Description 0 1 Not used 1 2 Not used 2 4 ERR Erro...

Страница 84: ...PSC 0 1 Query Syntax PSC Parameter Return Parameter 0 Disabled 1 Enabled Query Example PSC 0 Disables the clearing of the event registers at power up OPC Set Query Description The Operation Complete c...

Страница 85: ...that all tests have passed CLS Set Description The Clear Status command will clear the Status Byte Register by clearing the error queue and register groups that connect to the Status Byte Register wit...

Страница 86: ...er On 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 ERR QUES MAV ESB MSS OPER 0 1 2 3 4 5 6 7 Output Buffer Error Que Enable Event Status Byte Register Service Request Enable Register Standard Opera...

Страница 87: ...21 Invalid character in number 123 Numeric overflow 131 Invalid suffix 148 Character data not allowed 151 Invalid string data Execution Errors 222 Data out of range 224 Illegal parameter value Device...

Страница 88: ...ent Meter DCA Voltage Meter DCV Current Range Auto Auto range only for 30mA 300mA 3A Voltage Range Auto Baud rate 9600 GPIB address 08 AD Speed 7 seconds 6 digits AVG Mode Shift DCV AVG 10 samples ACV...

Страница 89: ...C Temperature Coefficient C 200 0000 mV 0 0050 0 0035 0 0005 0 0005 2 000000 V 0 0050 0 0010 0 0005 0 0001 20 00000 V 0 0050 0 0010 0 0005 0 0001 200 0000 V 0 0050 0 0010 0 0005 0 0001 1000 000 V 0 0...

Страница 90: ...rue RMS AC Current Range Frequency 1 Year 23 C 5 C Temperature Coefficient C AC DC 30 00000 mA 45 Hz 2 kHz 2 kHz 10 kHz 0 5 0 05 1 0 0 05 0 03 0 006 300 0000 mA 0 03 0 006 3 000000 A 0 03 0 006 30 000...

Страница 91: ...255 GPIB 300A MAX 50 60 Hz 35VA MAX LINE RATING FUSE LINE 100VAC 120VAC 220VAC 240VAC T200mA SER NO LABEL AND TEST LEADS BEFORE DISCONNECT POWER CORD REPLACING FUSE INPUT T100mA NO FUSE Local AC DC 30...

Страница 92: ...aluation regarding the Electromagnetic Compatibility and Low Voltage Directive the following standards were applied EMC EN 61326 1 EN 61326 2 1 Electrical equipment for measurement control and laborat...

Страница 93: ...s 36 GPIB function check 45 Ground symbol 4 LCD conversion 88 List of features 9 Overview 9 Power on off safety instruction 5 Power up 19 Rack mount 20 Rear panel 16 Remote control 42 Command list 59...

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