Sensor Technology RWT440, User Manual

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Transducer Control 5 User Manual (RWT3746IM)
Revision 7, September 2020 - Page 27
Zero Offset
The Zero Offset feature sets a fixed torque offset value. The Zero Offset can be used
to remove any offset that may have been introduced from its mechanical installation,
or from idle torque present. It must be stressed that the zero offset is no substitute for
correct installation.
Any torque value up to FSD is permitted; values over 25% of FSD are allowed but are
not advisable. Using an offset of over 25% will flag the High Zero Offset warning. When
using high zero offsets, care must be taken not to overstrain the transducer. A zero
offset will not extend the full-scale rating of the transducer, e.g. if a transducer was
zeroed at 50% then a further 50% was applied, the transducer will have reached full
scale, even though the transducer would be reading 50%.
The zero offset can be temporarily overridden by the digital zero commands, or the
Normal/Average Zero Input. When the transducer is power cycled the saved zero offset
will be restored.
The offset can be entered manually or set from one of 3 options.
Offset Torque Value
The
“Offset Torque Value” text box is the torque offset value in the transducer’s native
unit. The offset is subtracted from the captured torque readings. Manually type in the
required offset, or select from the 3 options.
Current Zero
The
“Current Zero” button sets the “Offset Torque Value” to the current zero
offset value of the transducer.
Clear Offset
The
“Clear Offset” button sets the “Offset Torque Value” to zero.
Load Applied
The
“Load Applied” button sets the “Offset Torque Value” to the current un-
zeroed torque value.
Save Zero Offset
The
“Save Zero Offset” button saves the “Offset Torque Value” into the transducer’s
memory. The offset will be retained across power cycles, until it is cleared by this
setting, by the zero input on the transducer, or a factory reset.