CONTEXT SENSITIVE

HELP KEY

Provides direct assistance

with menus, settings and

parameters; reducing the need

to interrupt the working process

by viewing the Instruction

manual.

CONVENIENT

TEST FUNCTION

Performs a quick

internal self-calibration

and measurement zero,

allowing for confidence

in the following

measurement results.

USER SETTABLE LIMITS AND PROTECTION

Various methods of protection are provided to protect the test

setup from damage by unexpected occurrences.

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LIMITS

A dual polarity limit (also known as compliance) can be set to

ensure that the instrument cannot source or sink a voltage or

current beyond the set value, preventing potential damage to a

device under test. If a limit is reached, the SMU will continue to

function in a limited state and will recover if the source level is

reduced or the load changes accordingly.

Alongside this, OVP, OCP and OPP protection trips are also

available; shutting the output off if a limit is reached.

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HIGH REACTANCE MODE

When attempting to source into a highly reactive load which may

be capacitive or inductive there may be visible overshoot, ringing

or even in some cases instability. High Reactance mode helps to

compensate for and reduce the risk of these issues.

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PROTECTION

Source voltages higher than 42V can be password protected* as

a safety precaution to prevent any unwanted high voltages being

set, A high voltage interlock is also available via the DIO pins*.

Passwords can be added to a range of settings, which can be

particularly useful to prevent any unwanted changes being made

during longer tests or in education environments.

SENSE TERMINALS

Sense terminals are provided for 4 Wire operation and guard

capabilities. 4 Wire measurements are important when it is

essential to measure the voltage delivered to a load, independent

of any voltage drops in the connecting supply wires or contacts.

The guard capabilities can be utilised for very low current and

high impedance applications where potential unwanted leakage,

stray capacitance or magnetic coupling may be a problem.

Besides the obvious cost and bench

space savings, the SMU provides many

advantages over selecting a traditional

power supply, load, DMM and true arb

generator, including:

STABILITY- The SMU has the ability to keep

the output stable during unexpected load

changes due to precisely measuring its

own voltage and current and feeding this

back to the source.

SPEED- Interconnection of all of the

individual elements in a single unit

increases the timing accuracy and speed

of communications between the source

and measurement circuitry.

ACCURACY- Measurement error is

considerably reduced when compared

to individual instruments in one setup,

close integration of the source and

measurement elements achieves a

far more reliable performance and far

superior synchronisation.

WHY CHOOSE AN SMU?

An SMU is effectively multiple instruments in one, but with

many added benefits over selecting individual instruments to

create a test setup.

*SMU4201 only