DM482e User Manual
AEMULUS
22
To prevent over-voltage or over-current damage to the device-under-test (DUT), several levels
of output protection, termed COMPLIANCE, is incorporated. Maximum specifiable compliance
depends on the voltage or current range at which the pin is operating.
If a source pin reaches compliance during measurement, this indicates an error in the
operation. Example:
1.
DM482e is set to voltage source/current monitor mode; compliance of 2mA; output
load is a 1kohm resistor.
2.
If source voltage is 5V, the current that should flow through the resistor is 5V/1k=5mA.
3.
Due to compliance of 2mA, the source channel turns into a constant current source of
2mA. This yields a voltage of 2V across the resistor.
The measurement result is the average value of all samples taken for n
th
number of power line
cycle (PLC). For example, if the line frequency is set to 50Hz (period is 20ms), then 1 PLC equals
to 20ms. The measured data is a resultant of averaged of raw samples captured by ADC on
DM482e for 20ms.
The NPLC setting of an instrument allows adjustment of the tradeoff
between speed and accuracy. The greater the number of power line
cycles, the greater noise rejection and better resolution the signal value
will be.
NOTE
