Dryer Master AM3, Руководство по эксплуатации продукта

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Dryer Master  A M 3 Product Manual
© Dryer Master Inc. Page: 45
5.11.3 Engineering Functions 1 – Slope, Offset entry
Press the “ Touch area ” <values> to display the value entry
numeric keypad screen. Enter the desired value on the “Touch”
keypad.
Press the “ Touch area ” <Exit> to cancel and return to the main
screen
Press the “ Touch area ” <Back> to cancel and return to the
previous screen
Press the “ Touch area ” <More> to move to the next screen
Figure 69. – Engineering Functions 1 – Slope, Offset entry
How Slope and Offset values work:
The Slope and offset values are used to scale the voltage signals returned from the sensor. In the case
of the 4 products different scaling values can be applied for each product. Although the moisture
sensor output is not exactly linear it can be considered linear over the typical measurement range. The
“slope” values are factory set based on the sensor type and the product measured. This value needs no
adjustment. The offset value is a bias value and directly influences the displayed moisture readings
and will change with adjustments and calibration.
1) Adjusting the “Offset” to bring a sensor in line. In the event there is a significant difference
between the manual moisture test and the displayed value and adjustment to the offset value
can bring the displayed value in line. There is a direct relationship between the offset and the
displayed value. Note the manual test value and the displayed moisture.
2) Calculate the difference. If the Dryer Master sensor was higher than the manual test. The offset
value will need to be reduced by the calculated difference. If the Dryer Master sensor was
lower than the manual test. The offset value will need to be increased by the calculated
difference.
3) For example:
a) Dryer Master reading = 16.7, Manual test = 15.4
b) Difference 16.7 – 14.4 = 1.3
c) The offset value = 1.6
d) The offset value changes to 1.6 - 1.3 = 0.3
e) So the new value for offset becomes 0.3
Note the offset value can be a negative value, depending on the product values from -5 to +8 are well
within normal operation.
SYSTEM
F1 F2 F3 F4
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Rate Scale Max 100.00
Rate Scale Min 0.0
Control Mode: Standard
Beans 3.7 3.000
Offset Slope
Corn 1.6 5.500