Omega Vehicle Security freedom OM-550 - Manual (Page 41)

OM-550 u 36 u
3. Next, find m & b:
X1 = 0 VDC ç minimum expected input
= 0 A/D counts at Transducer minimum output
X2 = 2.0000 VDC ç maximum allowable input
= 20000 A/D counts at Transducer maximum output
Y1 = 20.00 %RH ç choose decimal point = 2
= 2000 display counts
Y2 = 90.00 %RH ç keep decimal point = 2
= 9000 display counts [Desired % RH resolution 2 places to right
m = (Y1 - Y2) / (X1 - X2) of the decimal point (.01% RH)]
= (2000 - 9000) / (0 - 20,000)
= 0.35000
b = Y2 - (m * X2)
= 9000 - (0.350 * 20,000)
= 002000
4. Programming for the previous example:
Figure 4-10
PRESS 1
PRESS V
PRESS YES
PRESS 035000
PRESS YES
PRESS 002000
PRESS 58
PRESS 2
THE FINAL CHANNEL
DESCRIPTION
PRESS THE EXIT KEY AND IT IS ECHOED