6240B DC Voltage Current Source/Monitor Operation Manual
9.5 Supplementary Descriptions
9-13
9.5
Supplementary Descriptions
9.5.1
How to Calculate Accuracy for Current Source, Current Measurement and
Current Limiter
Example) Calculating the accuracy in current source of 3 mA (3 mA range) with resistance of 1 k
connected
The accuracy formula in the current source range of 3 mA is as follows:
The output voltage Vo is 3V. Therefore,
Accuracy =
(% of s A + A
Vo / 1 V)
=
(3 mA
0.03 % + 800 nA + 30 nA
3 V / 1 V)
=
1.79
A
Thus, the accuracy in current source of 3 mA (3 mA range) is specified between 2.9982 mA to 3.0018 mA.
NOTE:
Vo in the 1-day stability, current limiter and temperature coefficient for voltage source all indicates volt-
age between output terminals.
Range
Accuracy
(% of s A + A
Vo / 1 V)
Current source
3 mA
0.03 + 800 nA + 30 nA