Using The Log Scale Function; Log Scale Display Function - YOKOGAWA SMARTDAC+ GX10 User Manual

Using the Log scale Function

Log Scale Display Function

IM 04L51B01-06EN
You can apply a logarithmic voltage that has been converted from a physical value to the
recorder, and then use the log scale (logarithmic scale) to display and record the physical
value. The recorder supports three types of input signals.
• Logarithmic Input
This is referred to as "Log input". Log input is input in which the voltage corresponds to
logarithmic values of physical values.
• Pseudo Log Input
This is referred to as "Pseud-log input." This input supports pseudo logs.
A pseudo log signal is a voltage obtained by summing the one's digit of the voltage
representing the exponent of the logarithmic data and the decimal digits of the voltage
representing the mantissa.
• Input That Is Linear on a Logarithmic Scale
This is referred to as "Linear-Log input." Linear log input is input in which the voltage
values correspond to the logarithmic values of physical values at each decade division
2
(for example, 1 × 10
linearly to physical values.
On the trend display, the recorder displays waveforms with the log scale. Digital values are
displayed as exponents (for example, 1.2E+03).
Display example on the GX/GP main unit
Trend display example on a Web application (GM)
) and in which, within each decade, the voltage values correspond
Log scale
Digital value
Log scale
1