Advanced Scaling - Omega SS-015-NA User Manual

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.
= ( �������������������� × ������������ ���� ) + ������������������������
��������������������
���������������� ���� ���� ������������
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.
Figure 19: Advanced Scaling Example
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.
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