Powertek
USER'S GUIDE
PA2553/
PA2553E
Three-Phase
Power Analyser
Warranty
Warranty 3
The Powertek instrument is warranted against defects in material and
workmanship for a period of two years after the date of purchase. Powertek agrees to
repair or replace any assembly or component (except batteries) found to be defective,
under normal use, during the warranty period. Powertek obligation under this warranty
is limited solely to repairing any such instrument which in Powertek sole opinion
proves to be defective within the scope of the warranty, when returned to the factory or
to an authorized service center. Transportation to the factory or service center is to be
prepaid by the purchaser. Shipment should not be made without prior authorization by
Powertek.
The warranty does not apply to any products repaired or altered by persons not authorized
by Powertek, or not in accordance with instructions provided by Powertek. If the
instrument is defective as a result of misuse, improper repair, or abnormal conditions
or operations, repairs will be billed at cost.
Powertek assumes no responsibility for its product being used in a hazardous or
dangerous manner, either alone or in conjunction with other equipment. Special
disclaimers apply to this instrument. Powertek assumes no liability for secondary
charges or consequential damages, and, in any event, Powertek' liability for breach of
warranty under any contract or otherwise, shall not exceed the original purchase price
of the specific instrument shipped and against which a claim is made.
Any recommendations made by Powertek or its Representatives, for use of its products
are based upon tests believed to be reliable, but Powertek makes no warranties of the
results to be obtained. This warranty is in lieu of all other warranties, expressed or
implied, and no representative or person is authorized to represent or assume for Powertek
any liability in connection with the sale of our products other than set forth herein.
Instrument Serial Number: __________________________________
4 PA2553 User's Guide
ISO-9001: 1994
RvC
Document Part Number: MO-PA2553-M
Revision C Print date: February 21, 2000
Copyright
Copyright 1999 Powertek All rights reserved.
All rights reserved. No part of this publication may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language in any form
without prior written consent from Powertek. This product manual is copyrighted and
contains proprietary information, which is subject to change without notice. The
product's displays and manual text may be used or copied only in accordance with the
terms of the license agreement.
In the interest of continued product development, Powertek. reserves the right to make
changes in this guide and the product it describes at any time, without notice or
obligation.
Powertek
Powertek UK
19 Cornwallis Rd.
Bilton, Rugby CV22 7HL UK
Tel: +44 1788 519911
E-mail: info@powertekuk.com
Powertek US Inc.
7 Third St.
Holbrook, NY 11741 USA
Tel: +1 (631) 615-6279
E-mail: info@powertekus.com
Cert. No. CA 23-98-01
Accredited by the RvA
Contents
Contents 5
INTRODUCTION_______________________________________________ 11
Scope ______________________________________________________ 11
Features____________________________________________________ 12
FUNCTIONAL DESCRIPTION____________________________________ 13
Theory of Operation__________________________________________ 13
Interfaces___________________________________________________ 15
Front Panel _______________________________________________ 15
Parallel Printer____________________________________________ 15
IEEE488 ________________________________________________ 16
USING THE POWER ANALYSER _________________________________ 17
Setting Up __________________________________________________ 17
Front Panel _________________________________________________ 18
Rear Panel Connections _______________________________________ 19
Starting the Power Analyser____________________________________ 20
Configuring the Power Analyser ________________________________ 20
Measurement Connections _____________________________________ 24
Using Internal Current Transducers ____________________________ 24
Internal Transducer Connections for Test_________________________ 25
Using External Current Transducers____________________________ 27
External Transducer Connections for Test ________________________ 28
SEQUENCE OF DISPLAY SCREENS_______________________________ 29
Using the Diagrams ___________________________________________ 29
Diagrams ___________________________________________________ 30
6 PA2553 User's Guide
VIEWING RESULTS ____________________________________________ 35
Display Screens ______________________________________________ 35
PRINTING RESULTS ____________________________________________ 51
Sample Printouts_____________________________________________ 51
CALIBRATION_________________________________________________ 65
Removing DC Current Offsets __________________________________ 65
Calibrating the Power Analyser_________________________________ 67
Calibration Procedures________________________________________ 67
Calibration Faults____________________________________________ 75
APPENDIX A - PHYSICAL SPECIFICATIONS ______________________ 77
Basics Group _____________________________________________ 36
Harmonics Group__________________________________________ 41
Waveforms Group _________________________________________ 44
History Group ____________________________________________ 46
Voltage Calibration ________________________________________ 69
Current Calibration ________________________________________ 72
Temperature & Humidity____________________________________ 77
Size & Weight ____________________________________________ 77
Power Input______________________________________________ 77
APPENDIX B - MEASUREMENT SPECIFICATIONS _________________ 79
Power Source Capabilities (Option E only)_______________________ 79
Input Signal Capabilities ____________________________________ 79
Input Burden _____________________________________________ 80
Measurement Accuracy _____________________________________ 80
Figures
Figures 7
Figure 1. Bench Type Power Analyser ________________________________ 17
Figure 2. Front Panel detail_________________________________________ 18
Figure 3. Rear Panel detail _________________________________________ 19
Figure 4. Startup screen ___________________________________________ 20
Figure 5. Setup Index screen with INTERFACES/DATE/TIME selected_______ 20
Figure 6. The Interface Setup screen__________________________________ 21
Figure 7. Setup Index screen with MEASUREMENTS & WIRING selected____ 21
Figure 8. The Measurements & Wiring Setup screen______________________ 22
Figure 9. Setup Index screen with CURRENT INPUTS selected_____________ 22
Figure 10. The Current Input Setup screen _____________________________ 23
Figure 11. Setup Index screen with PRODUCT OPTIONS FITTED selected ___ 24
Figure 12. The Product Options Fitted screen ___________________________ 24
Figure 13. 1 φ 2-Wire Connections diagram ____________________________ 25
Figure 14. 1 φ 3-Wire Connections diagram ____________________________ 25
Figure 15. 3 φ 3-Wire Connections diagram ____________________________ 26
Figure 16. 3 φ 4-Wire Connections diagram ____________________________ 27
Figure 17. Front Panel with Basics sample display _______________________ 29
Figure 18. Basic ∑RMS sample display _______________________________ 30
Figure 19. Harmonics Bargraph and List sample display___________________ 31
Figure 20. Waveforms V&W CONT φABC sample display ________________ 32
Figure 21. History WATTS φA sample display__________________________ 33
Figure 22. Basics ∑RMS MEAS φA display with callouts__________________ 36
Figure 23. Basics ∑RMS MEAS ∑φABC display ________________________ 36
8 PA2553 User's Guide
Figure 24. Basics ∑RMS INRUSH φA display __________________________ 36
Figure 25. Basics ∑RMS INRUSH ∑φABC display ______________________ 37
Figure 26. Basics ∑RMS INTEGRATED φA display with callouts___________ 37
Figure 27. Basics ∑RMS INTEGRATED ∑φABC display _________________ 37
Figure 28. Basics ∑RMS INTEGR AVG φA display______________________ 37
Figure 29. Basics ∑RMS INTEG AVG ∑φABC display ___________________ 38
Figure 30. Basics DC MEAS φA display_______________________________ 38
Figure 31. Basics DC MEAS ∑φABC display___________________________ 38
Figure 32. Basics DC INRUSH φA display _____________________________ 38
Figure 33. Basics DC INRUSH ∑φABC display_________________________ 39
Figure 34. Basics DC INTEGRATED φA display________________________ 39
Figure 35. Basics DC INTEGRATED ∑φABC display____________________ 39
Figure 36. Basics DC INTEG AVG φA display__________________________ 39
Figure 37. Basics DC INTEG AVG ∑φABC display______________________ 39
Figure 38. Basics FUND φA display with callouts________________________ 40
Figure 39. Basics FUND ∑φABC display ______________________________ 40
Figure 40. Basics ∑HARMS φA display with callouts_____________________ 40
Figure 41. Basics ∑HARMS ∑φABC display___________________________ 41
Figure 42. Harmonics Bargraph φA, VOLTS % Log display ________________ 41
Figure 43. Harmonics φA VOLTS ABS Lin display ______________________ 41
Figure 44. Harmonics Bargraph φA, VOLTS ABS Log display ______________ 42
Figure 45. Harmonics Bargraph φA, VOLTS % Lin display ________________ 42
Figure 46. Harmonics Bargraph φA, AMPS % Log display _________________ 42
Figure 47. Harmonics Bargraph φA, AMPS ABS Lin display _______________ 42
Figure 48. Harmonics Bargraph φA, AMPS ABS Log display_______________ 42
Figure 49. Harmonics Bargraph φA, AMPS % Lin display _________________ 43
Figure 50. Harmonics List φA, ABSOLUTE display ______________________ 43
Figure 51. Harmonics List φA, PERCENTAGE display ___________________ 43
Figure 52. Harmonics List φA, PHASE display__________________________ 44
Figure 53. Harmonics List φB, PHASE display__________________________ 44
Figures 9
Figure 54. Waveforms V&A CONT φA display with callouts _______________ 44
Figure 55. Waveforms V&A CONT φB display _________________________ 45
Figure 56. Waveforms V&A CONT φC display _________________________ 45
Figure 57. Waveforms V&A CONT ∑φABC display _____________________ 45
Figure 58. Waveforms V&W CONT φA display _________________________ 45
Figure 59. Waveforms V&W CONT ∑φABC display_____________________ 45
Figure 60. History VOLTS φA RMS display with callouts _________________ 46
Figure 61. History VOLTS ∑φABC RMS display ________________________ 46
Figure 62. History VOLTS φA PEAK display___________________________ 46
Figure 63. History VOLTS ∑φABC PEAK display _______________________ 46
Figure 64. History VOLTS φA THD display____________________________ 47
Figure 65. History VOLTS ∑φABC THD display ________________________ 47
Figure 66. History AMPS φA RMS display_____________________________ 47
Figure 67. History AMPS ∑φABC RMS display_________________________ 47
Figure 68. History AMPS φA PEAK display____________________________ 47
Figure 69. History AMPS ∑φABC PEAK display________________________ 48
Figure 70. History AMPS φA THD display_____________________________ 48
Figure 71. History AMPS ∑φABC THD display_________________________ 48
Figure 72. History WATTS φA display________________________________ 48
Figure 73. History WATTS ∑φABC display____________________________ 48
Figure 74. History VAR φA display __________________________________ 49
Figure 75. History VAR ∑φABC display ______________________________ 49
Figure 76. History PF φA display ____________________________________ 49
Figure 77. History PF ∑φABC display ________________________________ 49
Figure 78. Phase A Basic Measurement printout_________________________ 53
Figure 79. Total Basic Measurements printout __________________________ 54
Figure 80. Phase A Current Harmonics Barchart graphic printout_____________ 55
Figure 81. Phase A Current Harmonics Barchart nongraphic printout__________ 56
Figure 82. Phase B Harmonics Data List printout _________________________ 57
Figure 83. Phase A Waveforms graphic printout_________________________ 58
10 PA2553 User's Guide
Figure 84. Phase A Volts and Current Waveforms nongraphic printout________ 59
Figure 85. Phase B Waveforms graphic printout _________________________ 60
Figure 86. Waveforms Volts, Amps, Power graphic printout ________________ 61
Figure 87. Phase A Current Level History graphic printout _________________ 62
Figure 88. Phase A Current Level History nongraphic printout ______________ 63
Figure 89. Setup Index screen with Current Inputs selected_________________ 65
Figure 90. Input Selection selected ___________________________________ 66
Figure 91. Calibration selected ______________________________________ 66
Figure 92. DC Zero Date selected____________________________________ 66
Figure 93. Calibration selected ______________________________________ 68
Figure 94. Calibration Date selected __________________________________ 68
Figure 95. Open Circuit Point _______________________________________ 68
Figure 96. Open Circuit Point Zero Readings ___________________________ 69
Figure 97. Voltage Point initial display ________________________________ 69
Figure 98. Internal Voltage Point display ______________________________ 70
Figure 99. External Voltage Point Phase A _____________________________ 70
Figure 100. External Voltage Point Phase B ____________________________ 71
Figure 101. External Voltage Point Phase C ____________________________ 71
Figure 102. Internal Current Cal Point display___________________________ 72
Figure 103. Load "A" Current Cal Point display _________________________ 72
Figure 104. Load "B" Current Cal Point display _________________________ 73
Figure 105. Load "C" Current Cal Point display _________________________ 73
Figure 106. Internal Current Calibration Completion display ________________ 74
Figure 107. External Transducer A Current Cal Point display _______________ 74
Figure 108. External Transducer B Current Cal Point display _______________ 74
Figure 109. External Transducer C Current Cal Point display _______________ 75
Introduction
The purpose of this user guide is to describe the use and capabilities of the PA2553 and
PA2553E (External Current) Three-Phase Power Analyser.
Scope
The three-phase PA2553 is an easy-to-use, general purpose power analyser, which may
be configured for 1φ 2-wire, 1φ 3-wire, 3φ 3-wire or 3φ 4-wire power sources and loads.
Overall, the PA2553 analyzes the electrical power delivered to or by a device. The unit
can be quickly set up on your bench top. You can adjust the viewing angle using the
handle and adjust the contrast from the configuration screen.
The PA2553 Option E provides support for external current transducers of the
current:current or current:voltage type. This option also provides terminals at the rear
panel allowing the user to power external circuitry from the PA2553’s internal DC power
supplies (positive and negative 15V).
Introduction 11
Both the PA2553 and PA2553E analysers display voltage, current and wattage "results"
in numeric and graphic waveform formats. Results include voltage, current, wattage and
harmonic frequencies in absolute, percentage and phase. You may display the
fundamental in a bargraph format through the 40
th
the 50
results in divisions of time from seconds to days. Additional screens display voltage and
current peaks, harmonics, averages and reactive power with K-factor and crest factor of
the voltage or current signal.
All of the data that can be displayed on the PA2553/PA2553E screens can be printed in
full-page printout formats. Refer to Printing Results page 51. Note that both bargraph
and listing fundamental printouts contain the 2nd through the 50th harmonics.
harmonic. You may examine power waveforms graphically and chart historical
th
harmonic or in a listing format through
12 PA2553 User's Guide
Features
The PA2553/PA2553E Power Analysers’ features include the following—
• Simple interface.
• Display basic measurements of ?RMS, DC, Fundamental (harmonic), and
?Harmonics for any single phase or the total of all phases.
• Display harmonics in bargraph or a list format.
• Continuously updated displays of voltage, current and wattage waveforms.
• Display historic results for voltage and current, watts, reactive power and power
factor, for each of the three phases and the total, simultaneously.
• Allowance for scaling of all current readings by a numerical factor.
• Provide adjustable display contrast.
Functional Description
This chapter describes the circuitry and interfaces of the PA2553/PA2553E.
Theory of Operation
The PA2553/PA2553E is high performance test equipment. Within the analyser, voltage
and current signals are converted to digital data using DSP chips where the signals are
sampled automatically and periodically. A to D converters scale and sample data. The
data-analysis components analyze voltage and current input samples for harmonic
content.
The following is a list of the significant components and a description of their function
within the analyser.
Functional Description 13
Voltage Attenuators—Resistively attenuate the voltages present on the SOURCE A, B,
C and N terminals to a 2.5V peak-amplitude maximum voltage signal.
Hall Effect Transducer—Converts the current flowing from each phase SOURCE to
LOAD into isolated voltages of the PA2553.
Analog Anti-Alias Filters—Reduce the bandwidth of the signals applied to the inputs of
the ADCs to less than the sampling frequency.
Each of the attenuator outputs and the outputs of the Hall Effect transducers are
passed through identical analog anti-alias filters.
16-Bit A to D converters (ADC) and First In/First Out memory (FIFO)—
The ADCs digitize each signal with 16-bit resolution at the DSP generated
Sample Clock frequency. The FIFOs store each digital sample in memory to be
read by the DSP in blocks of 32 samples per converter.
80 MIPs Digital Signal Processor (DSP)—Processes the tasks required to compute the
multiple voltage, current, and power results. Also processes the tasks required to
format the results for display, printout and interrogation via the IEEE488
interface. Computed results are independent of the selected display and
IEEE488 interface requirements.
14 PA2553 User's Guide
The DSP generates a Sample-Clock signal from the computed frequency of the
user-selected synchronization source. The Sample-Clock signal clocks the
ADCs at a suitable frequency to ensure exact synchronization of the overall
measurements to the applied signals. The sampling frequency may be up to
170KHz and is slightly "dithered" to ensure that individual samples cannot be at
the exact same phase of the applied signals, while maintaining exact
synchronization for the overall measurement period.
The samples read from the FIFOs are passed through one to three stages of 6pole elliptical filters. (The stage of filtering is dependent on user-selected
configuration and bandwidth of harmonics measurements.) The first stage
filters the samples for all nonharmonic measurements. The second stage is antialias filtering of the samples for the DFT and waveform collection. The third
stage filters the samples for waveform period measurements to display the
synchronized results.
All measurements are made nominally over four cycles of the applied signal and
then two-pole filtered with a user-selected "averaging" filter to produce fast, yet
stable, measurement results. (Note that there are more cycles at very high
frequencies and less at very low frequencies.)
Historical results are maintained by the DSP from the unfiltered measurement
results. Harmonics results, both amplitude and phase, are computed by the DSP
by means of a variable length Discrete Fourier Transform (DFT). Nominally
400 equally spaced samples per cycle are also collected for waveform display
purposes.
At nominal line frequencies and below, all measurements are continuous, there
being no missed portions of the signal in any of the resultant measurements. At
very high frequencies "gaps" can only result in the harmonics measurements.
The DSP also contains 4Kx24 of internal RAM for working memory, 3Kx24 of
program memory and a 1Kx24 level 1 cache memory.
The DSP can perform one arithmetic and two data movements per 12.5ns,
yielding 80MIPs for arithmetic operations and 240MIPs overall capability.
IEEE488 Interface—Performs the majority of the bus interface details for the IEEE488
protocol. All IEEE-448 interfacing is with data output from the DSP, or data
and commands input to the DSP. This interface is controlled using a
commercially available IC (National Instruments TNT488).
Parallel Printer Interface—This IC performs the majority of the bus interface details
for the parallel printer protocol. The data to be output over the interface comes
from the DSP. This interface is controlled using a commercially available IC.
Graphical Display Module —Allows a visual reading of the results in alphanumeric
and/or graphical format. The display screen is a commercially available LCD
with 240x64 pixels and a CCD backlight. All graphical information for the
screens is generated by the DSP.
Keyboard—Allows for changing and bringing up the various displays of results. The
Real Time Clock (RTC) and Non-Volatile Memory (NVRAM)—Generates the date
Random Access Memory (RAM)—A total of 256Kx24, 15ns access time memory is
Flash Program Memory—This memory is rewritable "Flash" memory used for DSP
Interfaces
Note: Specifications are subject to change without notice.
Front Panel
Liquid Crystal Display —
Functional Description 15
keyboard is formed by six key switches, each individually readable by the DSP.
All actions taken as a result of a key being pressed are generated by the DSP.
and time of day information, and also stores the user display configuration, the
IEEE488 address, and the calibration data for each input. Both clock and
memory are within a single commercially available IC.
available to the DSP to store all "working" information, all computed results,
formatted printout data and display pixels. This memory also contains the
software program for the DSP, copied from the Flash Memory.
program storage. The program is copied into RAM following application of
power and is CRC checked for integrity. After being copied into RAM, the
flash memory is not used during normal operation.
240 x 64 High-Speed Graphics LCD with CCD Backlight (5" x 1.35" viewing
area)
Keyboard—
Two fixed purpose keys + four softkeys
Parallel Printer
Printer Interface—
Parallel IEEE1284
Format—
Unformatted text or PCL (user selectable)
Data Rate—
Up to 1000 characters per second (limited by printer)
Compatible Printers—
Text: any 80 character wide (or more) by 66 character long (or more) ASCII
parallel text printer
PCL: Hewlett-Packard DeskJet family, Hewlett-Packard LaserJet family, other
PCL level two (or higher) compatible parallel printer with 75dpi or greater raster
graphics print resolution
16 PA2553 User's Guide
IEEE488
Interface—
Addressing —
Capabilities —
Max. Talk Data Rate—
Max. Listen Data Rate—
Command Set —
Results—
IEEE488.1 (Certain commands conform to IEEE488.2)
Single address, user selectable via front panel between 0 and 29 inclusive
SH1 AH1 T6 L4 SR1 RL1 PP0 DC1 DT1 C0 E2 (350ns min. T1)
>200,000 bytes per second
>50,000 bytes per second
All front panel capabilities are provided via ASCII textual command sequences.
Any results may be obtained at any time from the interface as ASCII textual
numerical data. Additionally, status and state interrogatives are provided for "on
the fly" determination of product status.
Using the Power Analyser
The purpose of this chapter is to describe how to set up and use the PA2553/
PA2553E. This chapter covers—
• Setting Up
• Using the Front Panel Buttons
• Rear Panel Connections
• Power Testing
Setting Up
The Power Analyser is made to sit on your bench. You can optimize the viewing angle by
adjusting the handle and optimize the viewing brightness by adjusting the DISPLAY
CONTRAST. (See Configuring the Power Analyser page 20.)
Using the Power Analyser 17
Figure 1. Bench Type Power Analyser
♦ To adjust the handle—
1. Press and hold the buttons located where the handle attaches to the case sides.
2. Rotate the handle until it clicks into place.
18 PA2553 User's Guide
F1
F2
F4
WARNING: IF THE POWER ANALYSER IS USED IN A MANNER NOT SPECIFIED BY
!
Powertek, THE PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED.
Front Panel
The front panel on the PA2553
switch and buttons. The buttons are from left to right: NEXT, F1, F2, F3, F4 and PRINT.
See below.
and PA2553E includes a LCD display screen, power
PA2553
P
OWERANALYSER
ON
OFF
NEXT PRINT
Powertek
Power switch
NEXT
F3
LCD display
Figure 2. Front Panel detail
The screen shows the power measurement results numerically and graphically. Refer to
Viewing Results, page 35.
The ON/OFF button powers the PA2553/PA2553E on or off.
The NEXT button allows you to toggle through the five main display groups. Refer to
Sequence of Display Screens, page 29.
The F1 through F4 buttons (functional softkeys) allow you to select menu choices. For
more information refer to Viewing Results, page 35.
The PRINT button allows you to print a full page of data reflecting the display results.
Printouts are formatted either graphically or tabulated. (Refer to Printing Results page
51.)
Rear Panel Connections
Using the Power Analyser 19
!
Figure 3. Rear Panel detail
The PA2553 and PA2553E rear panels provide connectors for a power cord, parallel
printer cable and computer interface cable. The PA2553E additionally provides three
external current (bnc) connectors and three transducer voltage plugs.
See below.
♦ To power the PA2553/PA2553E—
• Insert the socket end of the power cord into the rear panel’s 3-prong connector. Insert
the plug end into an 85-250 volt AC, 47 - 63 Hz outlet.
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
!
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
Available on PA2553E only
♦ To connect a printer to the PA2553/PA2553E—
• For printer interface, connect one end of your printer's cable to the PARALLEL
PRINTER port and the other to the printer.
♦ To connect a PC to the PA2553/PA2553E—
1. Attach the computer's IEEE488 cable connector to the 24-pin socket marked IEEE
on the rear panel.
2. On the front panel, press the NEXT button until you see the Setup Index display.
3. Press CURSOR until INTERFACES/DATE/TIME is highlighted.
4. Press the SETUP button. The screen changes to show the Interface Setup Index
display.
5. Press CURSOR until the IEEE ADDRESS option is selected.
6. Press the CHANGE button until the appropriate address number displays.
7. Press DONE.
20 PA2553 User's Guide
Starting the Power Analyser
♦ To start the PA2553/PA2553E, click the ON/OFF button to the ON position.
A startup screen will display for a few seconds. This screen lists the model number,
current and voltage input options, software revision number, and firmware installation
date and time.
Figure 4. Startup screen
Note: If your unit is not calibrated, a WARNING statement will display along the top
of the Startup screen stating either: “ UNCALIBRATED INSTRUMENT” or
“CALIBRATION DATA HAS BEEN LOST.”
The next display you will see is the same screen that displayed when the analyser was last
turned off.
Configuring the Power Analyser
The Setup Index screen gives you access to separate interface configuration screens.
There is a screen for Interfaces/Date/Time; Measurements; Current Input (selection and
scaling); Calibration and one to view Product Options. Refer to Figure 5, Figure 7,
Figure 9, and Figure 11.
♦ To reconfigure the power analyser —
1. Press the NEXT button until you see the main Setup Index screen display, as shown
below.
Figure 5. Setup Index screen with INTERFACES/DATE/TIME selected
2. Press the CURSOR button to highlight the configuration item of choice and press
SETUP. The screen will change to display the selected item’s configuration screen.
Using the Power Analyser 21
♦ To setup the Printer, IEEE488 address interface, date and time—
1. With INTERFACES/DATE/TIME highlighted, press the SETUP button. The
display changes to the Interface Setup display.
Figure 6. The Interface Setup screen
2. Use the CURSOR key to highlight any portion of the display that you desire to
modify. Press the CHANGE key to change the highlighted portion to the next
available option for that data.
• DATE = month, day, year.
• TIME = (24) hours = minutes = seconds.
• DISPLAY CONTRAST = 0 to 15 (default is 8)
• PRINTER = PCL2; None; Text. Note that selecting None for the printer
type disables the PRINT button in all screens.
• IEEE488 ADREESS = 1 through 29
Note: If you pass an option you desire, you can come back to it by continuing to press
CURSOR.
3. Press the DONE key to save any changes made, and to return to the Setup Index
screen.
♦ To configure the measurements —
1. From the main Setup Index display, press the CURSOR button to highlight
MEASUREMENTS & WIRING.
Figure 7. Setup Index screen with MEASUREMENTS & WIRING selected
22 PA2553 User's Guide
2. Press the SETUP button. The display changes to the Measurements &Wiring
Setup display.
Figure 8. The Measurements & Wiring Setup screen
3. Use the CURSOR key to highlight any portion of the display that you desire to
modify. Press the CHANGE key to change the highlighted portion of the display to
the next available option for that data.
WIRING = 1φ 2-wire(AN); 1φ 3-wire(ANB); 3 φ 3-wire (ABC); 3φ
FREQUENCY RANGE = .02Hz- 20Hz; 20Hz- 75KHz; 20Hz- 5KHz;
INPUT COUPLING = AC & DC; AC only
AVG RESULTS = 50ms; 250ms; 1s; 2.5s; 5s; 10s; 20s; 1min
SYNC SOURCE = Voltage; Current; 50Hz; 60Hz; 400Hz; No Harmonics
4. Press the DONE key to save any changes made, and to return to the main Setup
Index screen.
4-wire (ABCN)
2Hz- 2KHz; 0.2Hz- 200Hz
♦ To configure the Current Input
Note that the Current Input configuration screen includes selection and scaling. The
current scale allows you to scale all current readings by a numerical factor. Separate
scale factors are stored for each current input option, and are entered as transducer
input:output ratio. Each scale factor may also be negative, effectively reversing the
polarity of current flow for that phase.
1. From the Setup Index display, press the CURSOR button twice. The CURRENT
INPUTS choice is now highlighted as shown below.
Figure 9. Setup Index screen with CURRENT INPUTS selected
Using the Power Analyser 23
2. Press the SETUP button. The display changes to the Current Input Setup display.
See example shown below.
Figure 10. The Current Input Setup screen
3. Use the CURSOR key to highlight any portion of the display that you desire to
modify. Press the CHANGE key to change the highlighted portion of the display to
the next available option for that data.
INPUT SELECTION = External (Volts); Internal: External (Amps)
The scaling limits for current are within:
SCALING (IN=OUT) = +0000 .00A = 00.0000A to -9999 .99A = 99.9999A
The scaling limits for voltage are within:
SCALING (IN=OUT) = +0000 .00V = 00.0000V to -9999 .99V = 99.9999V
4. Press the DONE key to save any changes made, and to return to the Setup Index
screen. Note that the scale factor for each available current input is stored
separately.
Note: To remove DC offset and calibrate the power analyser, refer to the Calibration
section on page 65.
24 PA2553 User's Guide
♦ To view the Option Content of your Power Analyser
1. From the Setup Index display, press the CURSOR button four times. The
PRODUCT OPTIONS FITTED choice is now highlighted as shown below.
Figure 11. Setup Index screen with PRODUCT OPTIONS FITTED selected
2. Press the SETUP button. The display will show the Product Options Fitted screen.
See an example shown below.
Figure 12. The Product Options Fitted screen
3. Press the DONE key to return to the Setup Index screen.
Measurement Connections
!
WARNING: IF THE POWER ANALYSER IS USED IN A MANNER NOT SPECIFIED BY
Powertek, THE PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED.
CAUTION: FOR ALL CONNECTIONS, KEEP INPUT AND OUTPUT WIRING SEPARATED.
Using Internal Current Transducers
When using the internal current transducer of the power analyser, access the Current
Input Setup screen. Set the INPUT SELECTION to Internal and +1.0:1.0 for Scaling.
Refer to the connections shown below.
Using the Power Analyser 25
Internal Transducer Connections for Test
Turn the source power off for the device-under-test before making any connection.
!
Attach the test device to the input terminals on the analyser's rear panel.
Note: Ensure that PA2553/PA2553E is configured for the same wiring technique that
you are using for the connection.
Refer to the following connection diagrams for each wiring configuration—
PA2553
LOAD
SOURCE
N
ABC
TEST DEVICE
USER LOAD
NEUTRAL
POWER
LINE
SOURCE
LN
Figure 13. 1φ 2-Wire Connections diagram
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
PA2553
LOAD
SOURCE
A B
N
ABC
TEST DEVICE
NEUTRAL
LINE A
NEUTRAL
LINE B
USER LOAD
POWER
SOURCE
Figure 14. 1φ 3-Wire Connections diagram
Note: Phasing of A and B is unimportant.
26 PA2553 User's Guide
TEST DEVICE
USER LOAD
CHASSIS GROUND
POWER
SOURCE
PA2553
LOAD
SOURCE
B
A
C
N
ABC
B
A
C
Figure 15. 3φ 3-Wire Connections diagram
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
Notes:
1. Phasing of A, B and C is unimportant.
2. This wiring configuration may also be used when the PA2553/PA2553E has been
set for 3φ 4-wire. In that case the PA2553/PA2553E will display the phase to
ground voltages, however, the VA and VAR values may not be valid.
Using the Power Analyser 27
TEST DEVICE
USER LOAD
POWER
SOURCE
PA2553
LOAD
SOURCE
B
A
C
N
ABC
B
A
C
Figure 16. 3φ 4-Wire Connections diagram
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
Notes:
1. Phasing of A, B and C is unimportant.
2. If either the Power Source or User Load does not have a neutral connector, then that
wire may be omitted.
3. This wiring configuration may also be used when the PA2553/PA2553E has been
set for 3φ 3-wire. In that case the PA2553/PA2553E will display the phase to phase
voltages.
Using External Current Transducers
When using the external current transducer, access the Current Input Setup screen. Set
the correct type of current transducer (External Amps or Volts) for INPUT SELECTION
and +1.0 for Scaling.
28 PA2553 User's Guide
External Transducer Connections for Test
Connections are similar to those shown in the internal current transducers, however, only
the SOURCE, Phase and Neutral connections need be directly made to the PA2553. Pass
each phase current conductor to the load through an external current transducer. Connect
the output of the transducer to the respective BNC terminal on the PA2553 rear panel.
Note the following -
• Each of the “Live” phase connections should be passed through current transducers.
Thus 1 transducer is required for 1-phase 2-wire (phase A), 2 for 1-phase 3-wire
(phase A and B), and 3 for 3-phase 3-wire or 4-wire configurations.
• Take special care that the same phase is connected to each respective SOURCE
terminal as that for which the current transducer output is connected to the respective
BNC terminal.
• If the power analyser unexpectedly displays negative watts indications, this is an
indication that the current flow in the transducer is reversed. Either the wire is
reversed in the transducer, or the transducer output has the incorrect polarity. This
may be resolved by correcting the wiring or by setting the current input scale factor
in the power analyser to a negative polarity.
• If a transducer is being used, which does not have DC current capability, then AC
Only input coupling should be chosen in the Measurements Setup screen.
• If a transducer is being used, which has DC current capability, and the user desires to
measure any DC current content, then AC & DC input coupling should be chosen in
the Measurements Setup screen of the power analyser. The user should perform
the DC offset correction procedure as described on page 65, after making the
connections and allowing the external transducer to settle after application of its
power.
• Particularly when operating at low current levels, it may be important to ensure that
the voltage signals cannot capacitively couple into the current transducer outputs.
The use of flexible coaxial cable is recommended for the current transducer output
wiring.
Sequence of Display Screens
F1
F4
Results
This chapter shows the sequence of the display screens in a diagram format.
Using the Diagrams
The NEXT button takes you through the five main groups of display screens: Setup,
Basics , Harmonics, Waveforms and History. The group names are assigned here to
assist in navigating and do not display on the screen. Setup Index is used for
configuring the analyser and is described in Using the Power Analyser, page 17. The
other four displays are used to view results and are introduced in the following sequence
diagrams. Within each main group there are various display screens that are accessible
using the softkey buttons.
Sequence of Display Screens 29
Refer to Figure 17 below—
PA2553
P
OWERANALYSER
ON
OFF
NEXT PRINT
Powertek
F2 F3
Figure 17. Front Panel with Basics sample display
Hour=Min=Sec
Measurement
30 PA2553 User's Guide
Diagrams
NEXT F1 F2 F3 F4
Basics ↓ ∑rms ↓ MEAS ↓ φA STOPPED/RUNNING
↓ ↓ INRUSH ↓ φ B STOPPED/RUNNING
↓ INTEGRATED ↓ φ C STOPPED/RUNNING
INTEG AVG ∑φABC STOPPED/RUNNING
↓ DC ↓ MEAS ↓ φA STOPPED/RUNNING
↓ INRUSH ↓ φ B STOPPED/RUNNING
↓ INTEGRATED ↓ φ C STOPPED/RUNNING
INTEG AVG ∑φABC STOPPED/RUNNING
↓ FUND ↓ φA STOPPED/RUNNING
↓ φ B
↓ φ C
∑φABC
∑HARMS ↓ φA STOPPED/RUNNING
↓ φ B
↓ φ C
∑φABC
Note: If you wish to display ∑HARMS, and FUND, press the button in the F2 position
(second softkey from left) until MEAS comes up, then press F1 (first softkey on left).
Figure 18. Basic ∑RMS sample display
Sequence of Display Screens 31
NEXT F1 F2 F3 F4
Harmonics ↓ BAR φA
↓
↓ BAR φB ↓ VOLTS
↓ BAR φC
↓ BAR φA
↓ BAR φB AMPS
↓ BAR φC
↓ LIST φA
↓ LIST φB
LIST φC
↓ ABS
↓ PCT
PHASE
↓ % (Log)
↓ ABS (Lin)
↓ ABS (Log)
% (Lin)
↓ % (Log)
↓ ABS (Lin)
↓ ABS (Log)
% (Lin)
SCROLL (1– 50)
SCROLL (1– 50)
SCROLL (1– 50)
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
Note: Some or all of the three phases, φA, φB, and φC, may be present depending on the
wiring configuration.
Figure 19. Harmonics Bargraph and List sample display
32 PA2553 User's Guide
NEXT F1 F2 F3 F4
Waveforms ↓ V&A CONT STOPPED/RUNNING
↓ STOPPED/RUNNING
V&W CONT STOPPED/RUNNING
↓ ZOOM x 0.5
↓ ZOOM x 1
↓ ZOOM x 2
ZOOM x 5
↓ ZOOM x 0.5
↓ ZOOM x 1
↓ ZOOM x 2
ZOOM x 5
↓ φA
↓ φ B
↓ φ C
φABC STOPPED/RUNNING
↓ φA
↓ φ B
↓ φ C
φABC STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
Figure 20. Waveforms V&W CONT φABC sample display
Sequence of Display Screens 33
NEXT F1 F2 F3 F4
History ↓ VOLTS φArms
↓ ↓ φBrms
↓ φCrms
↓ ∑ABCrms
↓ φApk
↓ φBpk
↓ AMPS ↓ φCpk
↓ ∑ABCpk
↓ φAthd
↓ φBthd
↓ φCthd
↓ ∑ABCthd
↓ WATTS
↓ VAR
↓ φA
↓ φB
↓ φC
↓ 0.4 sec/div
↓ 1 sec/div
↓ 2 sec/div
↓ 5 sec/div
↓ 10 sec/div
↓ 30 sec/div
↓ 1 min/div
↓ 3 min/div
↓ 10 min/div
↓ 30 min/div
↓ 1 hr/div
↓ 3 hr/div
↓ 6 hr/div
↓ 12 hr/div
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
STOPPED/RUNNING
PF
∑ABC
1 day/div
STOPPED/RUNNING
Figure 21. History WATTS φA sample display
Notes:
1. The time scale may be set while displaying any data.
2. Some or all of the three phases (φA, φB, and φC) may be present depending on the
wiring configuration.
34 PA2553 User's Guide
Viewing Results
Review this chapter to determine which display shows the results that best suit your test
requirements.
Display Screens
The screen displays shown here reflect the default options in the Measurement &
Wiring Setup screen. Refer to Configuring the Power Analyser, page 20. For reference
those defaults are—
• 20Hz—5KHz, AC & DC • 3φ 4-wire • 250ms • Voltage
The default for DISPLAY CONTRAST is 8.
Viewing Results 35
If AC ONLY has been selected, then ∑rms will read: RMS (AC) and the message: NOT
CONFIGURED FOR DC MEASUREMENT will display in the Basics DC screen.
If an input signal does not fit inside the configured range (Measurement & Wiring
Setup), then your analyser may exhibit one of the following conditions—
• The screen may display a limited number of results
• A message may display on the screen instead of results
• You may not have access to the display screens
Throughout this chapter on Viewing Results, the sample display screens shown are most
often from phase A results. Note that phase B and C results (if configured) are similar to
phase A. Note also that ∑AB or ∑ABC provides the total for all configured phases.
The data is as follows—
• Harmonics, RMS and DC, Volts and Amps: Mean phase value.
• Inrush and Peak, Volts and Amps: Highest phase value.
• Watts, VAR: True vector total of all phases.
• VA: From total watts and VAR.
• Waveforms: All waveforms are shown in the same graph.
• Frequency is always from phase A.
36 PA2553 User's Guide
Current crest factor
Voltamperes
Amps
Volts
Hours=Min=Sec
Basics Group
The Basics group shows you a complete picture of the power results of your device. It
has 40 different total displays screens with up to 14 characteristics included in the
screens.
∑RMS
High voltage peak
Watts
Power factor
Voltage crest factor
High current peak
Figure 22. Basics ∑RMS MEAS φA display with callouts
Figure 23. Basics ∑RMS MEAS ∑φABC display
Reactive
power
Frequency
Time
Figure 24. Basics ∑RMS INRUSH φA display
Figure 25. Basics ∑RMS INRUSH ∑φABC display
Watt Hour
Voltamperes
Volt Hour
Amp Hour
Viewing Results 37
Elapsed time
of integration
Reactive Power Hour
Figure 26. Basics ∑RMS INTEGRATED φA display with callouts
Figure 27. Basics ∑RMS INTEGRATED ∑φABC display
Figure 28. Basics ∑RMS INTEGR AVG φA display
38 PA2553 User's Guide
Figure 29. Basics ∑RMS INTEG AVG ∑φABC display
DC
Figure 30. Basics DC MEAS φA display
Figure 31. Basics DC MEAS ∑φABC display
Figure 32. Basics DC INRUSH φA display
Figure 33. Basics DC INRUSH ∑φABC display
Figure 34. Basics DC INTEGRATED φA display
Viewing Results 39
Figure 35. Basics DC INTEGRATED ∑φABC display
Figure 36. Basics DC INTEG AVG φA display
Figure 37. Basics DC INTEG AVG ∑φABC display
40 PA2553 User's Guide
Voltamperes
Fund
If you wish to view the FUND displays, you must press the button in the F2 position until
MEAS comes up, then press F1.
Figure 38. Basics FUND φA display with callouts
Reactive Power
Figure 39. Basics FUND ∑φABC display
∑HARM
If you wish to view the ∑HARM display, you must press the button in the F2 position
until MEAS comes up, then press F1.
Triplens current
K-factor
Total harmonic
distortion for voltage
Total harmonic distortion for current
Figure 40. Basics ∑HARMS φA display with callouts
Viewing Results 41
Figure 41. Basics ∑HARMS ∑φABC display
Harmonics Group
The Harmonics group of screens show harmonic results. These results can be viewed in
a list or bargraph format. The List format shows the fundamental harmonic through to the
th
50
harmonic. The bargraph format shows through to the 40th harmonic.
Bargraphs
The bargraph displays show the fundamental through the 40th harmonic for current and
voltage in—
• Linear or logarithmetically scaled percentage units
• Linear or logarithmetically scaled absolute units
2nd through 40th Harmonic
Figure 42. Harmonics Bargraph φA, VOLTS % Log display
Fundamental
Harmonic
Figure 43. Harmonics φA VOLTS ABS Lin display
42 PA2553 User's Guide
Figure 44. Harmonics Bargraph φA, VOLTS ABS Log display
Figure 45. Harmonics Bargraph φA, VOLTS % Lin display
Figure 46. Harmonics Bargraph φA, AMPS % Log display
Figure 47. Harmonics Bargraph φA, AMPS ABS Lin display
Figure 48. Harmonics Bargraph φA, AMPS ABS Log display
Viewing Results 43
Figure 49. Harmonics Bargraph φA, AMPS % Lin display
Lists
Each LIST display screen is limited to a few lines. Use the Scroll button to view the
fundamental through the 50th harmonic result.
The List screens show harmonics in—
• Absolute with THD
• Percentages with THD
• Phase (shift to phase A voltage fundamental)
Figure 50. Harmonics List φA, ABSOLUTE display
Figure 51. Harmonics List φA, PERCENTAGE display
44 PA2553 User's Guide
Figure 52. Harmonics List φA, PHASE display
Figure 53. Harmonics List φB, PHASE display
Waveforms Group
The Waveforms group shows continuous results for voltage, current and wattage. The
display screens are in xy waveform format.
Each screen displays two waveforms for comparison purposes with additional
information provided with an inset.
The waveforms can be viewed at zoom levels of x0.5, x1, x2, and x5. The analyser will
automatically center the input results vertically on the screen, no matter what the range.
Automatically fits
range to data input
Figure 54. Waveforms V&A CONT φA display with callouts
Waveform timespan
Figure 55. Waveforms V&A CONT φB display
Figure 56. Waveforms V&A CONT φC display
Viewing Results 45
Figure 57. Waveforms V&A CONT ∑φABC display
Figure 58. Waveforms V&W CONT φA display
Figure 59. Waveforms V&W CONT ∑φABC display
46 PA2553 User's Guide
History Group
The History group gives you accumulated results at the following rates: 0.4 second,
1 second, 2 seconds, 5 seconds, 10 seconds, 30 seconds, 1 minute, 3 minutes, 10 minutes,
30 minutes, 1 hour, 3 hours, 6 hours, 12 hours, and one day per division.
The analyser will automatically scale and center the input results vertically on the screen.
Automatically
fits range to
data input
Figure 60. History VOLTS φA RMS display with callouts
One division
Figure 61. History VOLTS ∑φABC RMS display
Figure 62. History VOLTS φA PEAK display
Figure 63. History VOLTS ∑φABC PEAK display
Figure 64. History VOLTS φA THD display
Figure 65. History VOLTS ∑φABC THD display
Viewing Results 47
Figure 66. History AMPS φA RMS display
Figure 67. History AMPS ∑φABC RMS display
Figure 68. History AMPS φA PEAK display
48 PA2553 User's Guide
Figure 69. History AMPS ∑φABC PEAK display
Figure 70. History AMPS φA THD display
Figure 71. History AMPS ∑φABC THD display
Figure 72. History WATTS φA display
Figure 73. History WATTS ∑φABC display
Figure 74. History VAR φA display
Figure 75. History VAR ∑φABC display
Viewing Results 49
Figure 76. History PF φA display
Figure 77. History PF ∑φABC display
50 PA2553 User's Guide
Printing Results
This chapter illustrates some of the various printouts available using the PA2553/
PA2553E. Each printout reflects the data from the display group you are presently
viewing.
Sample Printouts
To get the type of printout you want, check your setting in the Interface Setup screen. A
text or graphic print is immediately initiated when the PRINT key is pressed for each of
the results display screens.
Every printout includes—
• Descriptive title of the data
• Configuration selections
• Current date in month, day, year
• Calibrated date
• Time in hours : minutes : seconds
• Elapsed time
• Powertek PA2553 or Powertek
PA2553E
• Version number
Note: Select PCL2 within the Interface Setup screen for graphical printouts.
Printing Results 51
The samples provided have been printed from each of the display groups Basics,
Harmonics, Waveforms, and History. In each case, the specific phase or sum of phases
prints out in accordance with the phase presently displaying.
• From the Basics group, you can print all the data for any one phase or the sum of all
phases (total) on one page. See
• From the Harmonics Bargraph group you can print separate barcharts for absolute or
percent, linear or logarithmetically, and current or voltage. See Figure 80 and Figure
81.
• From the Harmonics List group, you can print absolute, percentage, or phase data on
one page. See
Figure 82.
Figure 78 and Figure 79.
52 PA2553 User's Guide
• From the Waveforms group, you can print volts, amps and power waveforms all on
one page, if a graphic printer is selected. See Figure 83, Figure 85, and Figure 86. If
a text-only printer is selected, then volts and amps will print in a textual
representation of the waveforms. See Figure 84.
• Each History display will print a full page of formatted data. See Figure 87 and
Figure 88.
The following pages illustrate some sample printouts.
Printing Results 53
For a printout like the following, press the PRINT button from any one of the Basics
display screens. For phase A data press the PRINT button when φA is displaying in the
F3 position, etc. for phase B and C.
Figure 78. Phase A Basic Measurement printout
54 PA2553 User's Guide
For a printout of the total Basics Measurements, press the PRINT button from any one of
the Basics displays when ? φABC is showing in the F3 position.
Figure 79. Total Basic Measurements printout
Printing Results 55
Press the PRINT button from Harmonics BAR φA AMPS % (Log) screen to print a
barchart like the one shown below. Each Harmonics display screen will print separately.
Configure the analyser for a PCL2 printer.
Figure 80. Phase A Current Harmonics Barchart graphic printout
56 PA2553 User's Guide
Press the PRINT button from Harmonics BAR φA AMPS % (Log) screen to print a
barchart like the one shown below. Each Harmonics display screen will print separately.
This sample printed with the analyser configured for Text printer.
Figure 81. Phase A Current Harmonics Barchart nongraphic printout
Printing Results 57
Press the PRINT button from any Harmonics List display screen to print out PCT, ABS
and PHASE data for both voltage and current. Each Harmonics List printout includes
the fundamental through all available harmonics up to the 50th.
Figure 82. Phase B Harmonics Data List printout
58 PA2553 User's Guide
For a similar printout, press the PRINT button from Waveforms V&A CONT or V&W
CONT screens. For a phase A printout, as shown below, press PRINT when φA is
displaying in the F3 position, etc for Phase B and C. Configure the analyser for a PCL2
printer.
Figure 83. Phase A Waveforms graphic printout
Printing Results 59
To print the following, press the PRINT button from the Waveforms V&A CONT
screen. For a phase A printout, as shown below, press PRINT when φA is displaying in
the F3 position. Note that a printout for phases B and C will be similar. This sample
printed with the analyser configured for a Text printer.
Figure 84. Phase A Volts and Current Waveforms nongraphic printout
60 PA2553 User's Guide
For a similar printout, press the PRINT button from the Waveforms V&A CONT or
V&W CONT screens. For a phase B printout, as shown below, press PRINT when φB is
displaying in the F3 position. Note that a printout for phase C will be similar. Configure
the analyser for a PCL2 printer.
Figure 85. Phase B Waveforms graphic printout
Printing Results 61
For a similar printout, press the PRINT button from Waveforms V&A CONT or V&W
CONT screens whenever φABC is showing in the F3 position. Configure the analyser for
a PCL2 printer.
Figure 86. Waveforms Volts, Amps, Power graphic printout
62 PA2553 User's Guide
Press the PRINT button from any one of the History display screens for a printout of the
data being displayed. The printout shown below is from the History φA Amps RMS
display. Configure the analyser for a PCL2 printer.
Figure 87. Phase A Current Level History graphic printout
Printing Results 63
Press the PRINT button from any one of the History display screens for a printout of the
data being displayed. The printout shown below is from the History φA Amps RMS
display. This sample printed with the analyser configured for Text printer.
Figure 88. Phase A Current Level History nongraphic printout
64 PA2553 User's Guide
Calibration
Removing DC Current Offsets
Calibration 65
This chapter describes how to remove DC current offset and how to calibrate both the
PA2553 and PA2553E. The calibration signal levels given are for 950V, 40A options.
Other options will require different levels for calibration. Please refer to the Product
Options Fitted screen accessible from the Setup Index to ensure you are applying the
correct levels for your analyzer.
It is recommended that this procedure be performed at regular intervals and whenever
large ambient temperature changes occur. Also, if Option E is fitted, perform this
procedure when changing the external current transducer. Note that the DC Current
Offset procedure must be applied to all (three) of the CURRENT INPUT SELECTIONS
fitted in the PA2553E.
1. From the Setup Index display, press the CURSOR button twice to highlight
CURRENT INPUTS.
Figure 89. Setup Index screen with Current Inputs selected
66 PA2553 User's Guide
2. Press the SETUP button. The presently selected INPUT SELECTION will be
highlighted. Refer to illustration below.
Figure 90. Input Selection selected
3. Press the CHANGE button to select another INPUT SELECTION, as required.
• For the PA2553E: Internal, External Amps and External Volts
• For the PA2553: Internal
4. Press the DONE button.
5. Press the CURSOR button three times, the CALIBRATION choice is now
highlighted.
Figure 91. Calibration selected
6. Press the SETUP button. The display changes to the Calibration Setup as shown
below.
Figure 92. DC Zero Date selected
7. Ensure that there is no current flow in the selected current input (the voltages need
not be removed).
8. Press the PERFORM key. Any DC offset in the current measurement is measured
and subtracted from all future measurements. The date displayed next to DC ZERO
changes to “today’s” date. Offsets are separately stored for each of the current input
selections. Offsets up to 10% of the full-scale value for the respective current input
can be accommodated.
9. Press the DONE key to return to the main Setup Index screen.
Calibrating the Power Analyser
The analyser is fully specified for one year of operation. Recommended maintenance
includes an annual calibration and if Option E is fitted, calibrate when changing the
external current transducer. A full calibration includes three calibration (cal) points: open
circuit, voltage and current. Note that external calibration of the power analyser must be
performed for all (three) of the CURRENT INPUT SELECTIONS fitted in the PA2553E.
You can access all three cal points from the Setup Index display:
• The voltage cal point requires a calibrator that can drive a 2mA load at a minimum
0.025% accuracy and 0.01% short-term stability.
• The current cal point requires a calibrator that can drive a 200mV burden at a
minimum 0.025% accuracy and 0.01% short-term stability.
• Use a Fluke 5700 multi-function calibrator or equivalent for calibrating the standard
PA2553/PA2553E. Use a Fluke 5725A or equivalent to calibrate the power analyser
40A Option.
Calibration 67
Calibration Procedures
The user may calibrate the external current inputs with a user supplied current transducer
connected, however the user should note that all calibrations are carried out at DC thus an
inductive type transducer cannot be used during calibration. If a transducer is to be used,
then for best results, use the nominal current transducer-scaling ratio. If the power
analyser’s external current inputs are to be calibrated without an external transducer
fitted, then the scale factor should be set to +1.0:1.0.
If Option E is fitted, then each of the Current Inputs (Internal, External Amps and
External Volts). should be selected individually and the calibration procedure performed.
The date shown as the last calibration date is the date that the presently selected Current
Input was successfully calibrated.
Select the next appropriate INPUT SELECTION from the Current Inputs screen as
described in Removing DC Current Offsets page 65.
Note: For a quick reference, when calibrating, refer to the Calibration Connection
Table on page 76.
68 PA2553 User's Guide
♦ To access the Calibration Setup display—
1. Return to the main Setup Index display using the NEXT button.
2. Press the CURSOR button three times, the CALIBRATION choice is now
highlighted, as shown.
Figure 93. Calibration selected
3. Press the SETUP button. The display changes to the Calibration Setup display.
4. Press the CURSOR key, once. The date that the power analyser was last calibrated
is now highlighted.
Figure 94. Calibration Date selected
♦ To perform the open circuit point cal—
1. Press PERFORM. The display for calibrating the Open Circuit for Internal and the
External (Amps) will show: INPUT = ALL INPUTS OPEN CIRCUIT. The display
for calibrating Open Circuit for External (Volts) will show: ALL TERMINALS
OPEN, BNC SHORTED.
Figure 95. Open Circuit Point
2. Ensure that all wires from the source and load connectors on the back of the analyser
have been removed.
Calibration 69
Note: ESD and EMI noise can prevent registering zero values for open circuit
calibration.
3. Press ACCEPT.
4. Wait one minute until the readings settle. The values for Vn, Va, Vb, Vc and Aa,
Ab, Ac should zero out.
Figure 96. Open Circuit Point Zero Readings
5. Press ACCEPT again and wait until the readings are within ±0.1.
6. Press NEXT when this step is complete.
If you choose not to perform the next cal point, press SKIP instead of NEXT.
Note: If you skip any of the three cal points, the calibration date in the Setup Index
screen will not be updated.
Voltage Calibration
Depending on voltage option, the voltage cal point prompt will display—
INPUT = 400VDC SOURCE L & N TO CHASSIS
INPUT = 200VDC SOURCE L & N TO CHASSIS
INPUT = 120VDC SOURCE L & N TO CHASSIS
Figure 97. Voltage Point initial display
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
70 PA2553 User's Guide
♦ To perform the internal voltage point cal—
!
1. Connect the positive lead of the calibrator to the SOURCE A; B; C and N binding
posts on the rear panel.
2. Connect the negative lead of the calibrator to the chassis binding post.
3. Apply the proper voltage input as shown on the display.
Figure 98. Internal Voltage Point display
4. Wait one minute for the Vn; Va; Vb; and Vc readings to settle and press ACCEPT.
5. Wait another minute for the readings to settle to 0 ±0.1 and press ACCEPT.
6. Press NEXT when the readings are within specification.
7. Press SAVE DATA when all readings are within specification.
♦ To perform the external voltage point cal—
!
1. Connect the calibrator to the BNC of Phase A on the rear panel.
2. Apply the proper voltage input as shown on the display.
Figure 99. External Voltage Point Phase A
3. Wait one minute for the readings to settle and press ACCEPT.
4. Wait another minute for the readings to settle to 0 ±0.1 and press ACCEPT.
5. Press NEXT when the readings are within specification.
Calibration 71
6. Move the calibrator to the BNC of Phase B.
Figure 100. External Voltage Point Phase B
7. Repeat steps 2 through 5—apply proper voltage; wait for readings to settle to 0 ±0.1
and press ACCEPT; wait another minute for readings to settle and press ACCEPT;
press NEXT.
8. Move the calibrator lead to the BNC of Phase C.
Figure 101. External Voltage Point Phase C
9. Repeat steps 2 through 4—apply proper voltage; wait for readings to settle to 0 ±0.1
and press ACCEPT; wait another minute for readings to settle and press ACCEPT.
10. Press SAVE DATA when all readings are within specification.
If you choose not to perform the next cal point, press SKIP instead of NEXT.
Note: If you skip any calibration points, the calibration date on the Setup Index
display will not be updated.
72 PA2553 User's Guide
Current Calibration
The current cal point display will show one of the following prompts, depending on
option fitted—
INPUT = 2ADC SOURCE L TO LOAD L (8Apk Option)
INPUT = 10ADC SOURCE L TO LOAD L (40Apk Option)
Note: The current level shown on the display depends upon which current input option
is fitted.
Figure 102. Internal Current Cal Point display
WARNING: SHOCK HAZARD. LETHAL VOLTAGES OR CURRENT MAY BE PRESENT.
ENSURE NO VOLTAGE OR CURRENT EXISTS ON THESE CONNECTIONS PRIOR TO
ATTEMPTING TO CONNECT TO THESE INPUT TERMINALS.
♦ To perform the internal current cal point—
!
1. Connect the positive lead of the calibrator to SOURCE A binding post.
2. Connect the negative lead of the calibrator to the LOAD A binding post.
3. Apply the proper current input as shown on the display.
Figure 103. Load "A" Current Cal Point display
Calibration 73
4. Wait one minute for the readings Aa to settle and press ACCEPT.
5. Wait one minute for the readings to settle to 0 ±0.1 and press ACCEPT.
6. Press NEXT when the readings are within specification. The following screen will
display.
Figure 104. Load "B" Current Cal Point display
7. Move the positive lead of the calibrator to SOURCE B binding post.
8. Move the calibrator negative lead to the LOAD B binding post.
9. Repeat steps 3 through 6—apply proper current; wait for readings Ab to settle to 0
±0.1 and press ACCEPT; wait another minute for readings to settle and press
ACCEPT. Press NEXT and the following screen will display.
Figure 105. Load "C" Current Cal Point display
10. Move the calibrator positive lead to the SOURCE C binding post.
11. Move the calibrator negative lead to the LOAD C binding post.
12. Repeat steps 3 through 5—apply proper current; wait for readings Ac to settle to 0
±0.1 and press ACCEPT; wait another minute for readings to settle and press
ACCEPT.
74 PA2553 User's Guide
13. The screen will read:
Figure 106. Internal Current Calibration Completion display
14. Press SAVE DATA when this step is complete.
15. Press DONE.
♦ To perform the external current cal point—
!
1. Connect the calibrator to the BNC of Phase A.
2. Apply the proper current input as shown on the display.
Figure 107. External Transducer A Current Cal Point display
3. Wait one minute for the Aa readings to settle and press ACCEPT.
4. Wait one minute for the readings to settle to 0 ±0.1 and press ACCEPT.
5. Press NEXT when the readings are within specification.
6. Move the calibrator to the BNC of Phase B.
Figure 108. External Transducer B Current Cal Point display
Calibration 75
7. Repeat steps 2 through 5— apply proper current; wait for readings Ab to settle to 0
±0.1 and press ACCEPT; wait another minute for readings to settle and press
ACCEPT; press NEXT.
8. Move the calibrator to the BNC of Phase C.
Figure 109. External Transducer C Current Cal Point display
9. Repeat steps 2 through 5— apply proper current; wait for readings Ac to settle to 0
±0.1 and press ACCEPT; wait another minute for readings to settle and press
ACCEPT; press NEXT.
10. Press SAVE DATA when the readings are within specification.
11. Press DONE.
Note: If you have not skipped any steps, then the present date will automatically
replace the previous CALIBRATED date for the selected CURRENT INPUT.
Calibration Faults
In the event of a calibration fault, please check the connections to the calibrator and the
analyser before attempting calibration again. If you are unable to correct a fault
condition, contact Powertek for assistance and/or request a return merchandize
authorization (RMA) number. Refer to the front section of this guide for telephone
number, address and e-mail address of Powertek.
Important Note: Opening the Power Analyser's case may void your warranty.
76 PA2553 User's Guide
3-Phase Internal Voltage Connections 3-Phase External Voltage Connections
Calibrator Lead Rear Panel Calibrator Lead* Rear Panel
Negative Chassis ground Negative Coax Shield
Positive SOURCE A; N; B; C Positive EXTERNAL A (bnc)—
3-Phase Internal Current Connections 3-Phase External Current Connections
Calibration Connection Table
Center conductor of coax
Negative Coax Shield
Positive EXTERNAL B (bnc)—
Center conductor of coax
Negative Coax Shield
Positive EXTERNAL C (bnc)—
Center conductor of coax
Calibrator Lead Rear Panel Calibrator Lead* Rear Panel
Negative LOAD A Amp External transducer
Positive SOURCE A; B; C Volt EXTERNAL A (bnc)
Negative LOAD B Amp External transducer
Positive SOURCE A; B; C Volt EXTERNAL B (bnc)
Negative LOAD C Amp External transducer
Positive SOURCE A; B; C Volt EXTERNAL C (bnc)
*Option for user: External calibration may be performed using a non-inductive external
transducer.
Appendix A - Physical Specifications 77
Appendix A - Physical Specifications
For further details regarding a specific application contact Powertek. or its representative.
Refer also to Appendix B - Measurement Specifications.
Note: Specifications subject to change without notice.
Temperature & Humidity
Operating: 0°C to 45°C, <85% RH @ 40°C non-condensing
Storage: -30°C to 65°C, <95% RH @ 40°C non-condensing
Size & Weight
Size: (HxWxD) 4½” x 11½” x 10½”
Weight: 6lbs. (2.7kg)
Power Input
Voltage: 80-265Vrms (auto-selecting)
Frequency: 50/60/400Hz @ 25VA max.
78 PA2553 User's Guide
Appendix B - Measurement Specifications 79
Appendix B - Measurement Specifications
Unless otherwise indicated, all performance specifications are valid throughout the
specified operating temperature range, for a period of 1 year, following a 15 minute
warm-up period.
Where “typical” specifications are given, the specification is guaranteed for a typical
application (115V/230Vrms with a current > 10% range), for further details regarding a
specific application contact Powertek or its representative. Refer also to Appendix A -
Physical Specifications.
Note: Specifications subject to change without notice.
Power Source Capabilities (Option E only)
Output Voltage + and – 15V (within 0.5V)
Source Impedance 5?
Maximum Load 100mA
Input Signal Capabilities
Binding Post Signal Terminals
Voltage (950V option) 2500Vpk for 1s, 675Vrms continuous, 950Vpk
measurable
Voltage (1500V option) 2500Vpk for 1s, 875Vrms continuous, 1500Vpk
measurable
Voltage (400V option) 2500Vpk for 1s, 425Vrms continuous, 400Vpk
measurable
Current (8A option) 25Arms for 50ms, 10Arms continuous, 8Apk
measurable
Current (40A option) 125Arms for 50ms, 25Arms continuous, 40Apk
measurable
80 PA2553 User's Guide
BNC Signal Terminals (Option E only)
Common Mode 5Vpk maximum to Chassis
Voltage 25Vpk for 50ms, 2.5Vrms continuous, 2.5Vpk
Current 10Arms for 50ms, 2.5Arms continuous, 5Apk
Input Burden
All capacitances shown are typical values.
Binding Post Signal Terminals
To Chassis (400V option) 243K? || 60pF
To Chassis (950V option) 600K? || 60pF
To Chassis (1500V option) 1M? || 60pF
Source to Load (8A option) < 50m?
Source to Load (40A option) < 15m?
BNC Signal Terminals (Option E only)
VOLTAGE Mode
measurable
measurable
To Chassis 100K? || 5pF
Signal 100K? || 5pF
CURRENT Mode
To Chassis 50? || 5pF
Signal < 100m?
Measurement Accuracy
Unless otherwise shown, all percentages are percentage of the reading.
When including DC signal content, add DC Measurement Accuracy if total signal is less
than 0.5% full-scale for option, or if DC component is greater than AC component.
When using an external current transducer, the specifications for that transducer should
be added to the power analyser specifications to obtain the overall specifications.
Appendix B - Measurement Specifications 81
Voltage (Option 400V)
DC 0.1% (0.25% above 250V) + 0.1V
0.02Hz to 20Hz range 0.1% (0.25% above 250V) + 0.02V + 0.1%/Hz
add 0.15% below 0.04Hz if AC coupled
add 0.075V for peak measurements
0.2Hz to 200Hz range 0.1% (0.25% above 250V) + 0.02V + 0.01%/Hz
add 0.05% below 0.4Hz if AC coupled
add 0.075V for peak measurements
2Hz to 2KHz range 0.1% (0.25% above 250V) + 0.02V + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.075V for peak measurements
20Hz to 5KHz range 0.1% (0.25% above 250V) + 0.025V + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.3V for peak measurements
20Hz to 75KHz range 0.1% (0.25% above 250V) + 0.05V + 0.02%/KHz
add 0.1% below 40Hz if AC coupled
add 0.5V for peak measurements
Common Mode >70dB decreasing linearly to >40dB at 75KHz
Current to Voltage Crosstalk typically negligable
Voltage to Voltage Crosstalk >120dB decreasing linearly to >80dB at 75KHz
Phase (to other phase) 0.1° + 0.025°/KHz
Voltage (Option 950V)
DC 0.1% (0.25% above 400V) + 0.15V
0.02Hz to 20Hz range 0.1% (0.25% above 400V) + 0.025V + 0.1%/Hz
add 0.15% below 0.04Hz if AC coupled
add 0.1V for peak measurements
0.2Hz to 200Hz range 0.1% (0.25% above 400V) + 0.025V + 0.01%/Hz
add 0.05% below 0.4Hz if AC coupled
add 0.1V for peak measurements
2Hz to 2KHz range 0.1% (0.25% above 400V) + 0.03V + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.15V for peak measurements
20Hz to 5KHz range 0.1% (0.25% above 400V) + 0.05V + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.5V for peak measurements
82 PA2553 User's Guide
20Hz to 75KHz range 0.1% (0.25% above 400V) + 0.1V + 0.02%/KHz
Common Mode >70dB decreasing linearly to >40dB at 75KHz
Current to Voltage Crosstalk typically negligable
Voltage to Voltage Crosstalk >120dB decreasing linearly to >80dB at 75KHz
Phase (to other phase) 0.1° + 0.025°/KHz
Voltage (Option 1500V)
DC 0.1% (0.25% above 500V) + 0.3V
0.02Hz to 20Hz range 0.1% (0.25% above 500V) + 0.05V + 0.1%/Hz
0.2Hz to 200Hz range 0.1% (0.25% above 500V) + 0.05V + 0.01%/Hz
2Hz to 2KHz range 0.1% (0.25% above 500V) + 0.075V + 0.001%/Hz
add 0.1% below 40Hz if AC coupled
add 1V for peak measurements
add 0.15% below 0.04Hz if AC coupled
add 0.2V for peak measurements
add 0.05% below 0.4Hz if AC coupled
add 0.2V for peak measurements
add 0.05% below 4Hz if AC coupled
add 0.3V for peak measurements
20Hz to 5KHz range 0.1% (0.25% above 500V) + 0.1V + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 1V for peak measurements
20Hz to 75KHz range 0.1% (0.25% above 500V) + 0.15V + 0.04%/KHz
add 0.1% below 40Hz if AC coupled
add 2V for peak measurements
Common Mode >70dB decreasing linearly to >35dB at 75KHz
Current to Voltage Crosstalk typically negligable
Voltage to Voltage Crosstalk >110dB decreasing linearly to >60dB at 75KHz
Phase (to other phase) 0.1° + 0.05°/KHz
Internal Current (Option 8A)
DC 0.1% + 0.005A
0.02Hz to 20Hz range 0.1% + 0.005A + 0.1%/Hz
add 0.15% below 0.04Hz if AC coupled
add 0.02A for peak measurements
Appendix B - Measurement Specifications 83
0.2Hz to 200Hz range 0.1% + 0.005A + 0.01%/Hz
add 0.05% below 0.4Hz if AC coupled
add 0.02A for peak measurements
2Hz to 2KHz range 0.1% + 0.005A + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.02A for peak measurements
20Hz to 5KHz range 0.1% + 0.005A + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.04A for peak measurements
20Hz to 75KHz range below 10KHz : 0.1% + 0.01A + 0.4%/KHz
10KHz to 40KHz : 0.03A + 0.4%/KHz
above 40KHz : 16% + 0.03A
add 0.1% below 40Hz if AC coupled
add 0.1A for peak measurements
Common Mode 0.000001A / V / KHz (i.e. 0.0002A per KHz at
230V)
Current to Current Crosstalk >80dB decreasing linearly to >50dB at 75KHz
Phase (to other phase) 0.1° + 0.05°/KHz
Phase (to Voltage) 0.1° + 0.05°/KHz
add 1° for frequencies 1KHz to 10KHz
Internal Current (Option 40A)
DC 0.1% + 0.025A
0.02Hz to 20Hz range 0.1% + 0.025A + 0.1%/Hz
add 0.15% below 0.04Hz if AC coupled
add 0.1A for peak measurements
0.2Hz to 200Hz range 0.1% + 0.025A + 0.01%/Hz
add 0.05% below 0.4Hz if AC coupled
add 0.1A for peak measurements
2Hz to 2KHz range 0.1% + 0.025A + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.1A for peak measurements
20Hz to 5KHz range 0.1% + 0.025A + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.2A for peak measurements
84 PA2553 User's Guide
20Hz to 75KHz range below 10KHz : 0.1% + 0.05A + 0.4%/KHz
Common Mode 0.000005A / V / KHz (i.e. 0.001A per KHz at 230V)
Current to Current Crosstalk >75dB decreasing linearly to >45dB at 75KHz
Phase (to other phase) 0.1° + 0.05°/KHz
Phase (to Voltage) 0.1° + 0.05°/KHz
External Current (Option E, voltage input)
DC 0.1% + 0.0005V
0.02Hz to 20Hz range 0.1% + 0.0001V + 0.1%/Hz
0.2Hz to 200Hz range 0.1% + 0.0001V + 0.01%/Hz
10KHz to 40KHz : 0.15A + 0.4%/KHz
above 40KHz : 16% + 0.15A
add 0.1% below 40Hz if AC coupled
add 0.5A for peak measurements
add 1° for frequencies 1KHz to 10KHz
add 0.15% below 0.04Hz if AC coupled
add 0.0005V for peak measurements
add 0.05% below 0.4Hz if AC coupled
add 0.0005V for peak measurements
2Hz to 2KHz range 0.1% + 0.0001V + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.0005V for peak measurements
20Hz to 5KHz range 0.1% + 0.00015V + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.0015V for peak measurements
20Hz to 75KHz range 0.1% + 0.00025V + 0.02%/KHz
add 0.1% below 40Hz if AC coupled
add 0.0025V for peak measurements
Common Mode >60dB decreasing linearly to >40dB at 75KHz
Current to Current Crosstalk >120dB decreasing linearly to >80dB at 75KHz
Phase (to other phase) 0.1° + 0.05°/KHz
Phase (to Voltage) 0.1° + 0.05°/KHz
Appendix B - Measurement Specifications 85
External Current (Option E, current input)
DC 0.1% + 0.01A
0.02Hz to 20Hz range 0.1% + 0.002A + 0.1%/Hz
add 0.15% below 0.04Hz if AC coupled
add 0.01A for peak measurements
0.2Hz to 200Hz range 0.1% + 0.002A + 0.01%/Hz
add 0.05% below 0.4Hz if AC coupled
add 0.01A for peak measurements
2Hz to 2KHz range 0.1% + 0.002A + 0.001%/Hz
add 0.05% below 4Hz if AC coupled
add 0.01A for peak measurements
20Hz to 5KHz range 0.1% + 0.003A + 0.4%/KHz
add 0.05% below 40Hz if AC coupled
add 0.03A for peak measurements
20Hz to 75KHz range 0.1% + 0.005A + 0.02%/KHz
add 0.1% below 40Hz if AC coupled
add 0.05A for peak measurements
Phase (to Voltage) 0.1° + 0.05°/KHz
Phase (to other phase) 0.1° + 0.05°/KHz
Current to Current Crosstalk >100dB decreasing linearly to >70dB at 75KHz
VA
(Applied Voltage) x Current Accuracy + (Applied Current) x Voltage Accuracy
Power Factor
Combination of phase and crosstalk specifications
At 115 or 230Vrms (current >10% range for option fitted) -
PF = 1.0000 0.9000 0.7000 0.5000 0.3000 0.1000 0.0000
@ 50/60Hz 0.0001 0.0008 0.0013 0.0016 0.0017 0.0018 0.0018
@ 400Hz 0.0001 0.0009 0.0015 0.0018 0.0020 0.0021 0.0021
@ 30KHz 0.0005 0.0218 0.0318 0.0341 0.0329 0.0295 0.0273
@ 75KHz 0.0056 0.0725 0.1014 0.1068 0.1015 0.0897 0.0822
86 PA2553 User's Guide
DC Power
(Applied Voltage) x Current Accuracy + (Applied Current) x Voltage Accuracy
AC Power
Combination of (Voltage x Current Accuracy), (Current x Voltage Accuracy), and phase
specifications
At 115 or 230Vrms (current >10% range for option fitted, external current) PF = 1.0000 0.9000 0.7000 0.5000 0.3000 0.1000 0.0000
VAR
Combination of (Voltage x Current Accuracy), (Current x Voltage Accuracy), phase
accuracy, and common-mode
At 115 or 230Vrms (current >10% range for option fitted, external current, accuracy % of
VAR reading) -
@ 50/60Hz 0.2% 0.3% 0.4% 0.5% 0.8% 2.% 0.2%VA
@ 400Hz 0.2% 0.3% 0.4% 0.6% 0.8% 2.3% 0.23%VA
@ 30KHz 1.5% 3.1% 4.8% 6.9% 11% 30% 3.%VA
@ 75KHz 4.6% 9.9% 15% 20% 33% 10%VA 10.%VA
PF = 1.0000 0.9000 0.7000 0.5000 0.3000 0.1000 0.0000
@ 50/60Hz 0.2%VA 1.1% 0.5% 0.3% 0.3% 0.2% 0.2%
@ 400Hz 0.2%VA 1.2% 0.5% 0.4% 0.3% 0.2% 0.2%
@ 30KHz 1.0%VA 13% 4.5% 2.8% 2.1% 1.6% 1.4%
@ 75KHz 5%VA 40% 14% 8.3% 6% 4.4% 4.2%
Harmonics
In the following ‘N’ denotes a harmonic number.
Minimum Fundamental 1% of full-scale for selected synchronization source
Number Harmonics 50 or 40KHz/fundamental frequency (whichever
smaller)
Absolute Harmonics As signal accuracy + (0.05% x N)
Relative Harmonics 0.1% + 0.04%/KHz
Total Distortion 0.1% at line frequencies
Inter-Harmonic Phase 0.1° + 0.2°/KHz (harmonic > 0.1% full-scale)
Appendix B - Measurement Specifications 87
Frequency
Minimum Input 0.5% of range for Option for input selected
Measurement Accuracy 0.05% (sampling synchronized to within 0.01%)
Measurement Period 100ms or 1 cycle (whichever longer)
Integrated Results
Accuracy of integrated result + 0.05% + 10ms
Crest Factor
Accuracy From accuracy of peak results
Range 1 to 999
Form Factor
Accuracy From accuracy of amplitude results
Range 1 to 999
Load K-Factor
Accuracy From accuracy of harmonics results, typical accuracy
within 0.02 at line frequencies.
Range 1 to 999
Waveforms
Number of points per cycle 400 (nominally 0.4° accuracy)
Amplitude Accuracy As relevant peak accuracy
History
Timing Accuracy 0.05% + 10ms
Timing Resolution 5% of a division
Result Accuracy As the result
Filtering Non-peak results averaged over 5% of a division,
peak results have continuous coverage within each
5% of a division at all frequencies
Depth 10 divisions
88 PA2553 User's Guide
Timing (per division) 0.4 seconds, 1 second, 2 seconds, 5 seconds, 10
seconds, 30 seconds, 1 minute, 3 minutes, 10
minutes, 30 minutes, 1 hour, 3 hours, 6 hours, 12
hours, 1 day (user selectable)
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