AT5600 - Updates, New Features and Improvement

Information on AT56 firmware updates for all customers

This gives you new features, new tests and enhancements and fixes to the existing firmware.
All Firmware, Software and Manuals are free from our DOWNLOADS page.
If you have not performed a firmware upgrade before, there is a short YouTube video showing the upgrade process.

14 MAR 2023

AT5600 Firmware v1.004.030 - Maintenance Release


Self Test - Fixes some false fails on some self-tests when unit is functionally good.


KNOWN ISSUES - Currently being addressed for next release.
VOC - when testing multitap windings, and energizing only a part of the winding at 50-70 Hz, and attempting to measure whole winding, the until can reboot. Regular performance when whole winding is energized is not affected.

31 JAN 2023

AT5600 Firmware v1.004.028 / User Manual v24


Self Test - Fixes some false fails on some self-tests (typically ID #1011, 2023, 2023, 4041) when unit is functionally good.


KNOWN ISSUES - Currently being addressed for next release.
VOC - when testing multitap windings, and energizing only a part of the winding at 50-70 Hz, and attempting to measure whole winding, the until can reboot. Regular performance when whole winding is energized is not affected.

03 JAN 2023

AT5600 Firmware v1.004.018 / User Manual v24


Fixes an occasional false failure on self-test ID 1000.
Isolates test engine from self-test engine to increase robustness of changes.
Removed unused code.

HPAC HPDC - False flagging of Error Code 0200 fixed.
HPDC - Fixed bug causing occasional longer dwell time than expected.
MAGI WATT VOC - Fixed class D energization to prevent false 3400 error codes.
MAGI WATT VOC - Improved low voltage MAGI results.

KNOWN ISSUES - Currently being addressed for next release.
Self Test - Tests 1011 2023 2023 4041 can fail on some units, which previously passed.
These are false failures and will be corrected on next release.
VOC - when testing multitap windings, and energizing only a part of the winding at 50-70 Hz, and attempting to measure whole winding, the until can reboot.
Regular performance when whole winding is energized is not affected.

11 NOV 2022

AT5600 Firmware v1.004.012 / User Manual v23

SOUNDS - Added Beeps to indicate PASS/FAIL for compensation for a better user experience - follow the same settings as Run Pass/Fail sound.
DC1000 error codes - fixed bugs causing some possible DC1000 Error codes to be incorrect.

ID 1021  - Adjusted limits for Self-Test ID 1021 to stop false failures.
Fixed an issue with infinite self-test time on faulty hardware.

R  - Improved Compensation process for Resistance. Added range locking for resistance short circuit compensation.
R - Improved R test range selection algorithm. This stops R tests taking 60+ seconds or hanging in some extreme cases.
HPDC - Fixed excessive time on HPDC Test execution.
HPAC - AC-EHT trip level enhancement for very high frequencies.
HPAC - Fixed bug that caused issue with some server results flagging HPAC tests as 0020 error code.~
MAGI VOC WATT STRW - Improved Class D test execution. Maximum WATT for all 4 tests is now back to 40 Watts to match AT3600. AT Editor dotNET has already been modified to allow 40W to be programmed as max limit.
WAIT - Resolved WAIT test resetting User Relays bug, when using WAIT with OUT

Future Development - Coming Soon
FRONT PANEL MEASURE MODE - run individual tests from the front panel.
PWRF  - Power factor test – 0-270V Power factor test.
E-dt – Volts uSec test for pulse transformers.
CTM CTP – Current transformer tests.
API - Software library for direct control of AT5600 vis your own software.

HPDC - false flagging on 0200 is some cases causing fail and 30 second test time.

22 AUG 2022

AT5600 Firmware v1.004.006 / User Manual v22

Updated Chinese translation in language options.
Corrected test list so ZBX now shows.

Self test
Improvements to self test to remove false failures from self test.

R - Improvement to R range selection and stability and accuracy at <0.1 ohm.
OUT - fixed bug whereby TR LVOC and PHAS tests caused the previous OUT test status to reset to “all off”.
MAGI - improved ranging method to get better performance at low mA.
MAGI - fixed bug causing some Status Errors (0020 , 0002) in some cases.
IR - fixed ranging bug where some tests reported slightly lower than expected..
Add new calibration tables for upcoming enhanced calibration system to improve calibration and accuracy across all tests at higher frequencies.

10 JAN 2022

AT5600 Firmware v1.003.070 / User Manual v21


Added checksum to compensation storage to detect corruption.
Added timeout to USB Host reads.
Added OUT test to the test list screen.
Calibration date month on the start screen now displays as 3 letters. Such as APR for April.
Added new status bar icons that represent each separate USB port and update to show what is plugged into each port.
Fixed touch screen calibration bug
Adds a software run button to execute, compensation, and self test screen. This mirrors the RUNS STOP button to the touch screen.


Adjusted some self test relay timing tests that weren't recording the proper time of the relay opening/closing.
Modified source node resistance self tests to calculate resistance using the resistance execution engine.


LSBX LPBZ ZBX - Modified external DC1000 dc bias tests so that energization is maintained across tests in a DC A sweep
LSBX LPBZ ZBX - Fixed stability issue with DC1000 External-Bias tests.
MAGI VOC WATT - Enhancements to MAGI VOC WATT Class D stability during self test and normal test execution.
R - Adding a fixed 40ms delay to the beginning of a resistance test directly after energization of the CCS. 
LBAL GBAL - Added LBAL/GBAL common mode compensation during short compensation.
PHAS - Fixed bug that caused PHASE test results to vary between measurements
LL  - Modified LL to use less compiled tests, which caused a problem in programs with multiple  LL tests.
IR  - Enhancements to improve accuracy.
HPAC HPDC - Fixed bug that was causing some higher HPAC HPDC dwell times to not wait for the specified amount. 
MAGX WATX VOCX - Removed MAGX VOCX WATX  external source 230V trim limit to be in line with AT3600 behavior
WAIT - WAIT test now released.


MAGX WATX - Some instability at lower <50mA low currents when using AC INTERFACE.
This is being worked upon for future release.

02 JUL 2021

AT5600 Firmware v1.003.052 / User Manual v20

Fixed bug that caused some units to have issues unlocking keycodes with specific tests enabled.
Fixed bug that resulted in some tests having incorrect units displayed with the result.
Fixed issue where load compensation did not recall stored values properly.
Fixed bug that caused stored compensation to not delete properly from storage.
Fixed text area on part list screen when entering more than 23 characters.
Added new touch calibration that can be accessed on the unit info screen.

A large amount of self-test changes to increase stability and remove false fails.

IR - Fixed ranging issue that could cause Insulation Resistance test to loop endlessly.
LVOC - Adjusted the dc measure option on LVOC test.
MAGI - Fixes the inverted logic on the trip disable during MAGI. Less than 70Hz was disabled and greater than was enabled.
MAGI VOC WATT - Fixed class D ramp up that would sometimes cause unit crash or class d overload error.
WATT - Adjustment to the calculations for the WATT measurement to correctly apply the parallel resistance.

12 JAN 2021

AT5600 Firmware V1.003.024 / User Manual V19

Added multilingual support - Chinese Language option implemented.

Enhanced self-test detection of faulty relays. 
Self-test now takes 2 minutes and checks unit more thoroughly.
Improved reliability of self-test - improved limits to remove false failures.

ALL - Improved integration stability for all test types.
ALL - Improved stabilization for all test types.
ALL - Improved the shutdown process for the generators to better protect relays.
HPAC - Fixed breakout conditions for excessive current in high pot tests.
HPDC - Added a High Pot DC shutdown process to discharge any charged capacitance on non-energized nodes.
LL - Improved accuracy of Leakage Inductance. Improved model for parts with multiple secondaries or centre taps on windings.
LSB LPB - Improved bias offset correction in internal bias tests.
LSB LPB - Improved ranging in internal bias tests.
LSBX LPBX - Improved bias offset correction in external bias tests.
LSBX LPBX -Improved ranging in external bias tests.
MAGI - Fixed breakout conditions for excessive power in magnetizing current tests.
MAGI - Improved trimming capability on MAGI tests to reduce false 0020 error codes.
MAGI VOC WATT - Fixed bug that prevented execution at 20 Hz.
R - Improved accuracy of Resistance tests.
TR - Improved compensation model for TR type tests, especially for multi tapped parts
TR LL R - Improved compatibility of compensation storage for Turns Ratio, Resistance and Leakage Inductance tests. 
IMPORTANT - this improvement to the models will mean that any stored compensation will have to be reapplied after upgrade, as old compensations will be invalid.

12 AUG 2020

AT5600 Firmware V1.002.039 / User Manual V18

Maintenance release to fix bug on small percentage of unit where natural variations in display processor chip speed caused occasional reboots on previous versions.

02 APR 2020

AT5600 Firmware V1.002.038 / User Manual V16

Added Compensation Storage for load, open circuit, and short circuit compensation.
Added HID USB Barcode Scanner and HID USB keyboard functionality.
Added Schematic View on AT5600 screen. The new Schematic soft key gives you overview of connections.
Added Tests Enabled screen under Unit Info – Test List - see user manual 8.1.13 and below right

Schematic View AT5600
Schematic View AT5600
Enabled Tests AT5600
Enabled Tests AT5600

Fixed delay in printing program results.
RS232 over AUX port improved for speed
RS232 was dropping data during transfer to RX Buffer and is now fixed.
Unit very occasionally stopped while executing tests. Lock up is now caught and fixed

Added a page showing which tests are currently unlocked, accessed through the unit info screen.
Added a serial text box on program running screen that allows quick changes to the next serial number.
Added progress bars to the compensation screens.
Error with print error screen not showing during specific circumstances has now been fixed.
Failed tests now show up in red on results screen.
Fixed Issue where safety interlock wasn't updating GUI when disconnected even though voltage was turned off.

Progress bar was not being reset when "retry" was selected during Stop on Fail
The Run/Busy LED now illuminate properly after a kelvin failure.
The running screen now shows the currently executing test type.
Typo on compensation screen was fixed.

HPAC - Improved HPAC execution speed.
HPDC - Added support for VPRES. If a high pot test doesn't drop to less than 5 mA and less than 100V within three seconds, VPRES error code will be set. (HPAC HPDC IR ACRT DCRT ACVB DCVB)
IR - Improvement to insulation resistance to improve execution speed.
LL - Improved the LL test method to allow reverse energization of high turns ratio parts. High turns ratios create weak shorts which gave poor LL results.
LL,TR, TRL, LVOC, PHAS - Improved accuracy and polarity measurement issues.
LSBX - Execution speed for external bias tests is now comparable to the 1.001.026
LSBX - Fixed LSBX test taking longer than expected on some parts. External DC tests now take 1 second minimum to stabilise + execute
LSBX LPBX ZBX- Exponential forecasting model added for improving accuracy on external source tests using the DC1000.

MAGI - Adjusted tripping philosophy to improve the execution speed and result accuracy
MAGI - Adjusted tripping philosophy to improve the execution speed and result accuracy
MAGI, VOC, WATT - Added specification-based integration which improved test speed for Class D tests especially on short or Medium integration
MAGI, VOC, WATT, STRW - Class D tests no longer report occasional 0004 error codes.
MAGI, VOC, WATT, STRW - Improved the trip algorithm, improving stability of the Class D tests and reducing false error codes.

PHAS - Fixed PHAS test not trimming properly.
R - Improved short circuit compensation of resistance tests
R - Improved the execution speed of the DC resistance measurements
R - Reduced the amount of drift over time in resistance by a factor of 10%
SURG - Added a learning algorithm to select a better sample rate for SURG tests. This sample rate is now independent of limits that are selected and provides parity between measure mode and test run.
VOC - Fixed bug that caused OC comp to fail in some special cases of centre tapped transformers
ZB, LSB, LPB, ZBX, LSBX, LPBX - Added specification-based integration which improves test speed for these tests, especially on short or Medium integration

ZB - Fix to ZB Compile process to deal with STAT 0020.
HPDC - Fixed error code 0020 on IR and DC-EHT following a MAGI test. The issue was caused by the trip system latching during the shutdown process and not clearing for the HPDC test.
DCRT - Fixed DC ramp test reporting pass when it should fail.
LL - Fixed LL accuracy issue caused by running open circuit compensation.
LSB LPB ZB - Added Offset measurements to the LPG, voltage channel and current channel to improve stability of LSB, LPB and ZB measurements.
R - Improved compensation model for the resistance test.
TRL - Fixed TRL trimming issue on secondary caused by failing to preserve the shunt for the polarity measurement.

SELF TEST - ID1020 now has the filter state set properly so does not report false fails.
SELF TEST - Adjusted the self-test limits for GN01 open and close timing to reduce false self-test failures

KNOWN ISSUES - Issues being worked on for future release
Improvements to capacitance accuracy  at very low capacitance <10 pf
Fails DCRT - occasional status errors or mis-reads - Suggest HPDC as alternative.
Fails ACVB - occasional status errors or mis-reads.  Suggest HPAC as alternative.
Fails DCVB - occasional status errors or mis-reads. Suggest using HPDC as alternative
HPDC - Occasional Status errors and false fails when close to measurement limit.
Self test 1000 - Can give false fails on some units. If your unit fails self test on this test ONLY then the unit is deemed good. This will be fixed on the next release.

26 FEB 2019

AT5600 Firmware V1.001.026 / User Manual V14

When printing failures only to USB printer, the AT now prints the test number not the row position. (ID 9060)
This version also takes care of the editor locking up when running a program on the AT5600 while the safety interlock is already broken
Improved the TCP/IP connection process to be more robust.
Safety aborts are no longer latched while the Kelvin failure screen is shown.
The RUN led on the front panel is no longer left illuminated while the printing and communications are in progress.

Stop on fail is now followed by a safety interlock check.
Kelvin checks are now followed by a safety interlock check.
Resolved an issue that caused the AT5600 to crash if the printer ran out of paper.
The remote BUSY light now turns on appropriately.
Changed the text 'Transformers Tested' to 'Programs Run' on the program execution screen.
Stop on fail now uses the user set failure beep setting.
Added specification-based integration for CTY, R, R2, LS, LP, L2, QL, D, RLS, RLP, Z, ANGL, TR and LVOC to improve speed
Added a method to detect and recover from disruption on the USB peripheral.
Added the ability to move to a non-ideal resistance range combination when in high noise environments.

HPAC Modified the trip level for the AC-EHT generator to allow it to execute high voltage high frequency tests without tripping.
HPAC HPDC Improved the trimming for low level class D, HPDC and HPAC tests to reduce the chances of a spurious 0020 error code.
LL Deleted a legacy correction coefficient on the leakage inductance test.
LSB LPB ZB Compensation and Dc bias trimming is now improved for LPB and ZB tests.
LSBX LPBX ZBX Compensation is now improved or LSBX, LPBX and ZBX tests.
LS LP The accuracy has been improved at 1MHz and up. This Improvement also requires re-calibration
LVOC test signal trim improvement
LVOC tests now use turns ratios compensation method.
MAGI Mean sense RMS scaled in MAGI now works properly.
MAGI VOC WATT The ranging and learning process for class D tests has been modified to prevent false overloads.
MAGX tests now re-use energization properly if the energized test is the first test.
R CTY Improved the ranging process for DCR to prevent range hunting.
R CTY Increased the current ranges for DCR range combinations to reduce the decrease the probability of 0002 error codes.
R CTY Improved the low impedance detection on high DC resistance range combinations.
R CTY Resistance ranges and signal levels have been adjusted to give improved accuracy, particularly around 100 ohms.
TRL L2 Improved the trimming algorithm for TRL and L2 to reduce the effect of limits on the measured value when in auto mode.
VOC Improved noise rejection for VOC tests by utilizing harmonic analysis. (ID 9515)
VOCX WATX MAGX Improved the execution sequence for MAGX, WATX and VOCX to dramatically increase execution speed.
VOCX WATX MAGX Added class D current limiting to the energization process for MAGX, WATX and VOCX tests when used with AT output +Transformer
VOCX WATX MAGX External magnetizing tests no longer disable ESE even when the signal level or frequency changes. ESE is enabled for all sequential AC IF tests.

SELF TEST Fixed an issue with self-test ID 3100 false failing
KNOWN ISSUES - to be fixed in future release
LL – LL test when uncompensated, can return 1e-09. As LL typically always requires compensation for meaningful results due to the small values usually measured this should not affect many customers, but users should be aware.
DCRT sometimes gives erroneous STAT error and false fail
VOC Open Circuit compensation can fail in certain cases when using multiple tapped windings in a test.

21 SEP 2018

AT5600 Firmware V1.001.007 / User Manual V13

Fixed communications with the server locking the product.
Server failures no longer cause a problem if they happen at the same time as a printer failure.
The AT no longer freezes when the printer runs out of paper. The printer error screen is shown instead, and the user can retry the print operation.
Programs can now be run after a SUSPEND COMMS to server if user chooses.
The pass LED + REMOTE signal is now illuminated after power on offsets and self-test is finished. This matches AT3600 behaviour and helps with customers’ existing integration systems

Serial numbers for transformers no longer auto increment on stop or safety stop. They only increment on a result of "PASSED" or "FAILED".
Safety stops are now only posted if a program, self-test or compensation is running
Added a box around text in the execution screens around instruction text. This differentiates the instructions from the status information.
Changed the button "CANCEL" to "SUSPEND" on the results return error screen.
Changed the button "CANCEL" to "SUSPEND" on the printer error screen.
Increased the size of the top two touch areas in the part list to decrease the likelihood of a missed touch.
Returning to the program execution screen after a user or safety abort on the first run of a program no longer corrupts the Custom Text field. The proper stop screen is shown instead.
The results screen no longer jumps when at the bottom page after a full screen paint

TRL - Fixed accuracy and 0020 error code in TRL.
R - Improved the accuracy of drift correction for resistance test over unit warm up period.
STRW - STRW now has extra stabilization before trimming and measure.