![background image](http://html1.mh-extra.com/html/omega/ss-015-na/ss-015-na_user-manual_3967427018.webp)
6.3.4
Advanced Scaling
The Layer N SS-015 allows for advanced scaling options on process and pulse inputs only. The
Advanced Scaling
checkbox can be selected to expand additional configuration options. A gain and/or offset can be applied to the
input reading and the displayed unit can be changed.
To apply a gain or offset to the input, expand the
Scaling
menu and ensure that
Apply Scaling
is checked. There,
the gain and offset values can be adjusted. Both positive and negative values may be entered as well as decimal
numbers. The equation for the scaled input value is given below.
𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰
𝑺𝑺𝑺𝑺𝑺𝑺𝑺𝑺𝑺𝑺𝑺𝑺
= (
𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰𝑰
𝑹𝑹𝑺𝑺𝑹𝑹
×
𝑮𝑮𝑺𝑺𝑮𝑮𝑰𝑰
) +
𝑶𝑶𝑶𝑶𝑶𝑶𝑶𝑶𝑺𝑺𝑰𝑰
The displayed units can be changed by entering a new value in the
Unit
field and clicking
Apply Settings
. This
field is limited to a maximum of 4 characters. Note that changing the Unit field does not change the base unit
type, only the display name. The
Lock
checkbox must be selected to use the user-defined Unit field. Unchecking
the Lock checkbox and clicking Apply Settings will revert the unit display back to the default setting.
The screenshot above shows an example application for advanced scaling with renamed units. A fan
tachometer with a 500 Hz signal is connected to the Pulse Rate input. The fan outputs 2 pulses per revolution,
so to convert to rotations per minute (RPM) the reading must be divided by 2 which is accomplished by setting
the Gain to 0.5. The units can then be renamed to RPM and will display as such.
Figure 19: Advanced Scaling Example
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