The FT3 is uses a precision LVDT displacement sensor with highly stable electronics to produce a very sensitive transducer system.
Measurement Parameters-The key to repeatability and accuracy is to tightly control all the parameters that can lead to measurement uncertainty.
The parameters that affect thickness measurement are;
- Measurement pressure.
- Presser foot profile and size.
- Measurement velocity.
- Parallelism of presser foot to measurement plate.
- Dwell time.
To allow manufacturers in the same industry sector to measure using the same conditions, these key measurement parameters are often specified by international standards (ASTM/ISO etc.).
External effects such as temperature change and vibration will affect the measurement, the FT3 instrument is designed to reduce the impact of these.
The FT3 has a multi-point calibration routine to reduce/eliminate the effect of non-linearity in the LVDT sensor.
The 0.01micron resolution instrument includes routines to reduce the effects of short term thermo-electronic drift of <0.1 microns.