DOC. MIE91093 Rev. 1.34
Page 117 of 145
The direction of the current is indifferent: on one direction, ID
adds to IR; on the other one, it subtracts. With this
arrangement, the test result is quite accurate, as we measure
ID directly, rather than finding it from I1 – I2, as this implies
being sensitive to the measurement errors of I1 and I2.
When using TD1000
, the difference is that there is no need
of an external second current source, as TD1000 has two
independent current sources: the main one and the one
coming from the AUX output, selected as a current generator.
It should be understood that this source, as D1000, is actually
an high current voltage source: the output current is a
function of the burden.
The difference between D1000 and TD1000 is that D1000 can
source up to 5 A at 5 VA, while TD1000 can source up to 20 A
at 40 VA; so, you can use the following, simpler, schematic
connection.
A a
B b
C c
N n
I
1
I
2
