Yokogawa Button Operated DX2000 - Manual (Page 4)

3
2. LOG Input Specifications
2.1. Converting the LOG Input (Relationship between the Input Voltage and Digital
Display)
Trend display (logarithmic scale): Displays the input voltage on a logarithmic
scale.
Digital display: Displays the result obtained by converting the
input voltage using the equation below.
¾ The relationship between the input voltage of special LOG range and digital
display value is shown below.
Input voltage X
Lower limit of display span VL Upper limit of display span VU
Scale lower limit SL Scale upper limit SU
VL Input X VU
T
U
1.0E SL Y 1.0E SU
Digital display value Y = 10 (SU-SL)*(X-VL)/(VU-VL)+SL