Omega 1002 manual Suggested Settling Times

Before performing A/D conversions, the JP1 jumper should be set for single-ended or differential.

The software driver supports both polling and interrupt driven A/D, however, polling is the simplest way to perform an A/D conversion.

The settling time of multiplexer depends on the impedance of the signal source. Because the driver does not incorporate the settling time, the user needs to program a delay when switching from one channel to another or when changing gains.

Suggested Settling Times

One settling time is suggested for all ranges of the OME-PCI-1002L. The settling time for the OME-PCI-1002H is based on the analog input range. The table below shows the suggested settling times for each range.

OME-PCI-1002L Settling Time: 33 ∝seconds for all ranges

OME-PCI-1002H Settling Time

Input Range	Settling Time
± 10V	23 ∝S
± 5V	28 ∝S
± 0.1V	140 ∝S
± 0.01V	1300 ∝S

The software driver provides a machine independent timer, P1002_Delay(), for settling time delay. If the user calls P1002_Delay(), counter 0 will be reserved and can not be used as a user programmable timer/counter.

The A/D converter requires a trigger signal to start an A/D conversion cycle. The OME-PCI-1002 supports three trigger modes, software, pacer and external trigger.

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