Honeywell TC4S, Руководство пользователя

Страница: 116 / 128

8 . Appendix
8.1. Terminology
116 Isolated Thermocouple Input Module TC4S User's Guide R200
Honeywell September 2010
•
Multiplexer : a switching circuit where many signals share one A/D converter or
D/A converter.
•
Analog output module
: a module with output circuit to convert analog DC voltage
or current signal proportional to digital value delivered to the module from the
processor.
•
Resolution : the minimum value recognizable by a measuring instrument, which
usually displays in the engineering unit (1mv) or the number of bits. In other words,
16383 types of output are available for 14 bits.
•
Filter : used to reduce the change of the digitally-converted output value by sudden
change of the external noise or input for the analog circuit, through two methods of
Software and Hardware filters.
•
Accuracy : displays the maximum declination between agreeable value and output
voltage or current for the whole range of output. On the other hand, it is displays the
maximum declination between agreeable value and digitally-converted input signal
value for the whole range of input. Generally, percentage displays for the full scale.
•
Gain, Offset and Linearity error are all included in the error type available.
•
Output accuracy : displays the difference between the actual analog output
voltage/current value and the agreeable-converted value on the conversion graph for
the full scale, with Offset, Gain, and Drift error factors included as well as normal
temperature (25 ° C) and available temperature range displays, respectively.