ISA T1000 PLUS User Manual page 117

DOC. MIE91093
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.
Rev. 1.34
I
1
Page 117 of 145
A a
B b
C c
N n
I
2