Vishay G4-DT, Техническое руководство, Страница: 78 / 174

Technical Manual
5-2
If the G4 Instrument must be replaced, a table calibration of the replacement unit can
be performed, with recorded values from an earlier calibration.
To get the best accuracy, a ‘Known Force’ calibration with known force to at least
2/3 of the used range, should be performed.
All calibration parameters are found in the menus under ‘Function Block X’. The
parameters are described in chapter 4 Set-up.
Note that calibration must be done separately for each input of each Function Block in
the instrument.
Actual Input Force and transducer signal is displayed when in menu ‘Function Block X’.
Note that the force and transducer signal is displayed for one input at a time. The input
channel (A – D) that is displayed corresponds to the parameter that is selected
(highlighted) in the calibration menu.
Common parameters
For both calibration types measurement unit and resolution for the force value must
be set. These parameters apply to all inputs (input A – D) for the current Function
Block. The parameters, among others, are found in menu ‘Function Block X’. This
section deals only with the calibration parameters.
X:Measurement Unit
This parameter defines the unit used for the force value. The same unit will also be
used for related set-up parameters.
X:Resolution
This parameter defines decimal point position and resolution for the force value. The
decimal point position selected here will be used in set up, in the displayed force value
and in the force value sent to a printer or computer. Resolution is understood to mean
the smallest force change presented.
To ensure a stable force display, it is recommended that the input signal to the
instrument should exceed 0.2
µ
V / resolution increment.