Input Adc Filter; Open Circuit Detection; Stimulus/Response Sequences - Spectrum Controls Micro800 2085-IR8-SC User Manual

3-24 Chapter 3: Configuring the Micro800 Expansion I/O 2085-IR8-SC Using CCW
User's Manual Pub. 0300321-01 Rev. A
Single Measurement:
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A configuration error is reported if an invalid Connection Method option is
entered in the configuration table.
When the 3-wire measurement with compensation option is enabled, using a
faster ADC filter means the channel input reading becomes noisy. If the second
measurement value is bigger than the first measurement, the lead wire value is
clipped to zero.

3.6.6 Input ADC Filter

This configuration parameter allows you to select a filter setting that attenuates
the input signal beginning at the specified frequency.
The module applies the filter setting to each input channel in sequence during
data acquisition.
Index Filter (Hz)
0 17
1 4
2 62
3 470

3.6.7 Open Circuit Detection

The open circuit detection feature alerts you to a channel open circuit condition
by selecting the open circuit behavior option in the configuration table to display
a high limit, low limit, or zero data value for the appropriate channel(s) in the
input table. Open circuit detection may also be disabled for any or all channels.
Index Open Circuit Detection
0 Upscale
1 Downscale
2 Zero
3 Disable

3.6.8 Stimulus/Response Sequences

Once the module receives the configuration, the channel open circuit detection
will be activated on the channel with the feature enabled.
•
In 2-wire or 3-wire mode, open circuit detection is achieved during
normal data acquisition. There is no additional time added for open
circuit detection. 2-wire mode open circuit detection and 3-wire primary
pair open circuit detection occur on every scan.
•
When the 3-wire excitation wire is open, it causes the secondary pair to
open. This results in both lead and excitation wire detection by the
software. In this instance, the open excitation wire is immediately
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