Technical Documents

Adjustment of output

The output characteristics of GAP-SENSOR vary depending on the material or profile of the target. However, it is possible to maximize the performance of the sensor through adjustment of sensitivity.

Adjustment of GAP-SENSOR output (55 series sensor)

Technical Documents
CAL (GAIN)
Able to adjust the optimum conversion between the output voltage and the displacement with the sensitivity volume.
Technical Documents
SHIFT (ZERO)
Able to adjust the shift of the output voltage without changing the sensitivity.
Technical Documents
LINEAR
Compensations for the linearity range of output. When the linearity has been adjusted, readjustment of sensitivity and shift is needed.

Adjustment procedure

0-5 V output model (55015/5502A/5503A) (55MS-S)
  • 1) Set the clearance between the sensor and target to 0 mm and adjust the voltage to 0 V with SHIFT.
  • 2) Set the clearance between the sensor and target to the value equivalent to 1/2 full scale and adjust the voltage to 1/2 full-scale voltage with GAIN
  • 3) Set the clearance between the sensor and target to the value equivalent to full scale and adjust the linearity to full-scale voltage with LINEAR
  • 4) If LINEAR is operated later, go to Step (1) and repeat the adjustment. If LINEAR is not operated, the adjustment procedure is completed.
±5 V output model (5505/5507/5509/5514/5520/5530/5540) (55MS-M/55MS-Z)
  • 1) Set the clearance between the sensor and target to the value equivalent to 1/2 full scale plus α0 and adjust the voltage to 0 V with SHIFT.
  • 2) Set the clearance between the sensor and target to the value equivalent to 1/4 full scale plus α0 and adjust the voltage to -2.5 V with GAIN
  • 3) Set the clearance between the sensor and target to the value equivalent to 3/4 full scale plus α0 and adjust the linearity to +2.5 V with LINEAR
  • 4) If LINEAR is used later, go to Step (1) and repeat the adjustment. If LINEAR is not used, the adjustment procedure is complete

Glossary

Resolution

Even when the target is at a standstill, the voltage changes minutely due to the residual noise in the converter. It can be said that lower noise provides higher resolution and thus improves measuring accuracy. We measure the noise level at the half scale point of the sensor measuring distance, and convert it into displacement to define the resulting value as resolution. (Note that the values on the brochures are based on the system equipped with our power supply.)

Linearity

技術資料
The output voltage of the displacement sensor is proportional to the distance. However, the line plotted from actual measurements deviates from the ideal line. The difference between actual and ideal lines is expressed in percentage relative to the full scale of the sensor. (The values on the brochures are based on the room temperature.)

Measuring range

This range refers to the coverage in which the sensor can measure the target. The distance from the target to the sensor is proportional to the voltage output within this range. Thanks to our special sensor design, it is possible to measure the target beyond the specified measuring range by changing the sensitivity.

Frequency characteristics

Frequency characteristics refer to the frequency band in which vibrations, displacements, and rotating speeds of the target can be measured with GAP-SENSOR.

Temperature characteristics

The sensor sensitivity depends on the surrounding temperature, which is called temperature drift.
The temperature drift means sensitivity change per 1°C.
The PF series sensors feature minimum temperature drift among our GAP-SENSOR products.