RESISTANCE MEASUREMENTS (ALL MODES EXCEPT MV AND MC)

Resistance is internally calculated from measured Voltage and Current.

Resistance errors (in Ohms) may be calculated from respective voltage and current measurement results and specified errors as follows –

(Current*Voltage error + Voltage*Current error)/Current2)

Where Voltage is the Voltage reading in Volts (without polarity).

Voltage error is the specified Voltage measurement error in Volts.

Current is the Current reading in Amps (without polarity).

Current error is the specified Current measurement error in Amps.

POWER MEASUREMENTS (ALL MODES EXCEPT MV AND MC)

Power is internally calculated from measured Voltage and Current.

Power errors (in Watts) may be calculated from respective voltage and current measurement results and specified errors as follows –

(Current*Voltage error + Voltage*Current error + Voltage error*Current error)

Where Voltage is the Voltage reading in Volts (without polarity).

Voltage error is the respective specified Voltage error in Volts.

Current is the Current reading in Amps (without polarity).

Current error is the respective specified Current error in Amps.

VOLTAGE SOURCE (SV AND MHR MODES)

Accuracy

Same as voltage measurement accuracy.

Source Limit ⁴

SMU4001

±21V

SMU4201

±210V

Maximum Slew Rate

SMU4001

User settable 21V/s to 0.12V/µs

SMU4201

User settable 210V/s to 1.2V/µs

Settling Time (typical)

To reach within 0.5% of change, open load, max slew rate, manual ranges, High Reactance disabled.

300µs

Maximum current limit slew applied equivalent to: 1uV/us per 1nA current limit setting.

SMU4201 only : Add 280ms if changing from (>+21V to <-21V) or (<-21V to >+21V) (polarity reversal)

Output Impedance (typical)

<10µΩ (4-wire, steady state)

Overshoot (typical)

<0.5% + 1mV (resistive load)

High Reactance

Load Stability

Disabled

0 to 0.2µF

Enabled

>0.2uF to 200µF typical (inductive loading is also accommodated)

4) Limits include 105% overrange

CURRENT SOURCE (SC AND MR MODES)

Accuracy

Same as current measurement accuracy.

Source Limit

±3.15A

Maximum Slew Rate

User settable 3A/s to 36mA/µs

Settling Time (typical) To reach within 0.5% + 1nA of change, shorted load, max slew rate, manual ranges, High Reactance disabled.

200nA, 2uA, 20uA, 200uA

ranges

2.5ms

2mA range

600µs

20mA, 200mA, 1A, 3A ranges

200µs

SMU4201 Only

Add 280ms if changing from (>+21V to <-21V) or (<-21V to >+21V) (polarity reversal).

Overshoot (typical)

<0.5% + 10nA (shorted load)

CURRENT LOAD (LC, LR AND LP MODES)

Accuracy

LC mode

Same as current measurement accuracy.

LR mode

Same as resistance measurement accuracy.

LP mode

Same as power measurement accuracy.

Load Limit

LC mode

3.15A

LR mode

100mΩ to 250MΩ

LP mode

26.25W

Maximum Slew Rate

LC, LR modes

User settable 3A/s to 36mA/µs

LP mode

User settable 25W/s to 0.25W/µs