Справочник Пользователя для Advanced Wireless Solutions EMO-500
AW Company 8809 Industrial Drive, Franksville, WI 53126 à web: www.awcompany.com
Tel: 262-884-9800 Fax: 262-884-9810 | Email: aw@awcompany.com
REV. 4 10/05 EMO-500 Manual.DOC
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EMO 500 - RATIO FEEDBACK MODE
The EMO 500 also features a Ratio Feedback Mode of operation in which the Ideal
Ratio and the Actual Measured Ratio are compared and a 4-20 mA signal will be
generated to control one of the Flow Rates. This will maintain the programmed Ideal
Ratio over a wide range of flow rates.
The formula used to determine the correct analog output is as follows:
generated to control one of the Flow Rates. This will maintain the programmed Ideal
Ratio over a wide range of flow rates.
The formula used to determine the correct analog output is as follows:
Analog Output = Half Range + (Ideal Ratio-Actual Ratio) * Gain
The Half Range refers to the middle point of the Analog Output. If the output varies
from 0 to 20mAmp. the half point will be 10mAmp.. If the Analog Offset is set to give
an output of 4 to 20mAmp. the Half Point will be 12mAmp.
To use the Ratio Feedback Mode the user should enter 07 as the Analog Rule (See P.18).
NOTE: The Ratio Feedback Mode w/Reset works in exactly the same manner
excepting that the analog output will go to the start point (mid-point) on Reset All input.