6240B DC Voltage Current Source/Monitor Operation Manual
5.2.9 Source and Measurement Timing
5-51
3. Current source
The settling time (Ts) of the 6240B is defined by the current source value (Is), the current sense re-
sistance (Rs), the load voltage (VRL = Is RL), and the settling time setting (Fast/Slow), as shown
below.
Set the measurement delay (Td) to Ts or over.
Unit [s]
Example) 3 mA range, slow mode, 1 mA current with 1 k resistance
Is=1 mA
VRL=1 mA 1 k=1 V
Ts=(26 VRL)/(Is Rs)+100
Ts=(26 1 V)/(1 mA 220 )+100=218
Set as Td > 218 s.
Range Fast Slow
30 A Ts = (60 VRL) / (Is Rs)+200 Ts = (80 VRL) / (Is Rs)+300
300 A to 1 A Ts = (16 VRL) / (Is Rs)+50 Ts = (26 VRL) / (Is Rs)+100
4 A Ts = (32 VRL) / (Is Rs)+100 Ts = (50 VRL) / (Is Rs)+200
Rs value
Range Rs []
30 A22 k
300 A 2.2 k
3 mA 220
30 mA 22
300 mA 2.2
1 A 0.25
4 A 0.25
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