Voltech AT5600, Руководство пользователя

Страница: 163 / 438

C H A P T E R 7 – T E S T S A N D T E S T C O N D I T I O N S
AT5600 User Manual 98-119 issue 14
Page 163
7.43. ZBX - Impedance with External Bias
DC Bias
Measure
Range
Test
Voltage
Test
Frequency
Basic Accuracy
0.1A to 250A
1m

to 1M

1mV to 5V 20Hz to 3MHz
0.2%
This test requires the use of one or more Voltech DC1000 Precision DC Bias
Current Sources.
IMPORTANT; When using this test, ensure that the terminal you pick as
HIGH in the editor program is also the node that is connected to the AHi
output of the DC1000. Similarly, the node you specify as LOW should also
be the node that is connected to the ALo output of the DC1000
The Winding Impedance with External Bias test measures the impedance of a
selected winding while applying a DC current from the DC1000 through the
winding. An AC voltage is also applied across the winding from the AT.
This test can be used with inductors to measure the change in impedance with a
bias current.
IMPORTANT UPDATE FOR LEGACY AT3600 USERS
The DC1000 can be easily integrated with the AT series testers to give
automated and integrated DC Bias testing, combined with the wide range of
tests provided by the AT Series.
If you are integrating the DC1000 with any of the high voltage AT tests (IR,
HPAC, HPDC, DCRT, ACRT, DCVB & ACBV) it is important that the DC1000 is
ONLY connected to nodes used as the LO terminals in these high voltage tests.
This will prevent damage to the DC1000.
Any terminals used for LSBX, LPBX & ZBX, cannot be used as “HI” terminals
for IR HPAC, HPDC, DCRT, ACRT, DCVB or ACBV in the same program.
The AT5600 and AT Editor will check for this and warn you if you are attempting
to do this. The AT3600 and old AT Editor did not give this warning, but it is still a
valid best practice for the AT3600. See DC1000A user manual section 6.5.4
Please also see
14.6.39 for specific advice on programming the test, and
10.2.28 for test accuracy specification