Checkline FH Series User Manual

Page 27

Zero calibration standard with target ball put on it

6.3.3 Multi-point calibration (Zero + 1 to 4 point(s) )

For multi-point calibration you must first carry out a zero point calibration. The precision standards

must be used (1 to 4 as requested) to calibrate for the further calibration points. The precision

standards have different thickness values.

1. In most cases a Two-point calibration (Zero + one standard) will be sufficiently good as far

as calibration is made in the range of thickness to be expected.

2. Further calibration points are only necessary if measurement will be made over a larger

thickness range and if accuracy requirements are high.

Now use arrow keys to select “Zero + 1 point” calibration. Press OK

to confirm. Carry out zero calibration as described under 6.3.2. Then

use arrow keys to select “Calibr. Point 1”, press OK to confirm.

Please always use one of the precision standards supplied with the

sensor. Make sure first to place the target ball on the precision

standard. Then place the precision standard together with the target

ball onto the sensor. Wait for the signal tone to sound and lift the

precision standard more than 30 mm from the sensor. For calculation

of average repeat several times.

In the “CAL = “ field, the calibration mean value will be shown

which has been calculated form the set of single readings you have

taken. If this value is the same as specified on the precision

standard, press OK to complete the calibration procedure. If not,

please use arrow keys to correct the value as requested.