Omega Engineering OMB-1108-0901 사용자 설명서
DaqTemp User’s Manual
09-06-02
Overview & Theory of Operation 1-5
Scanning
Every DaqTemp has an on-board scan sequencer that permits the user to select any combination of up to
512 channel/range combinations. The sequencer scans all channels contained in the sequence at the rate of
5 µs/channel, thereby minimizing the time-skew from channel-to-channel. The user can also set the time
between scan groups, from 0 to 6 hours. In addition to scanning analog inputs, the sequencer can scan
digital inputs and counter inputs.
512 channel/range combinations. The sequencer scans all channels contained in the sequence at the rate of
5 µs/channel, thereby minimizing the time-skew from channel-to-channel. The user can also set the time
between scan groups, from 0 to 6 hours. In addition to scanning analog inputs, the sequencer can scan
digital inputs and counter inputs.
DaqTemp Scanning Example
(1) Channels can be sampled dynamically by the sequencer.
(2) Gain can be programmed, for each channel, dynamically by the sequencer.
(3) Unipolar or Bipolar operation can be programmed, for each channel, dynamically by the sequencer.
(4) Thermocouples can be of the following types: J, K, T, E, N28, N14, S, R, B
(5) Counter Inputs [any of four] can be scanned along with the analog and digital inputs.
(6) Digital Input Ports can be sampled along with Analog Inputs.
The DaqTemp PCI board’s 512-location scan sequencer allows you to select each channel and associated
input amplifier gain. All channels are scanned at 200 kHz (5 µs/channel). In addition, the digital and
frequency inputs can be scanned using the same scan sequencer employed for analog inputs, enabling the
time correlation of acquired digital data to acquired analog data. The PCI board permits each scan group,
which can contain up to 512 channel/gain combinations, to be repeated immediately or at programmable
intervals of up to 6 hours. Within each scan group, consecutive channels are measured at a fixed rate of
5 µs per channel, or 10 µs per channel
input amplifier gain. All channels are scanned at 200 kHz (5 µs/channel). In addition, the digital and
frequency inputs can be scanned using the same scan sequencer employed for analog inputs, enabling the
time correlation of acquired digital data to acquired analog data. The PCI board permits each scan group,
which can contain up to 512 channel/gain combinations, to be repeated immediately or at programmable
intervals of up to 6 hours. Within each scan group, consecutive channels are measured at a fixed rate of
5 µs per channel, or 10 µs per channel