16
Press the buttons
and
for setting real values
of hardness, to go to the next digit number, press EDIT by
:
Press the buttons
for
adjusting the values of the next
samples.
Then, move your selection on the hardness value
according to the sample, and make at least 5
measurements. Make sure that the value of X would not
varied by more than 5%.
If you get an obvious error measurement, press EDIT by
and press DELETE, the last measurement will be
removed from the series. Go to the next nominal pressing
, and make the same procedure with other samples,
you end up with:
To save, press BACK by
, window will appear:
Press YES by
. Calibration is saved. Select the appropriate material and
scale, and device is ready for operation.
11.2. User (additional) calibration
Each of the saved main calibration may be further corrected. Additional
calibration is recommended in the following cases:
- If the measurements of the device on the samples are constant, but differ from
the nominal value of the standard block;
- After extended storage (more than 3 months.);
- After intensive operation;
- With a significant change in the operating conditions (temperature, humidity,
etc.).
For the calibration of hardness needed one (single-point calibration) or two (two-
point calibration) standard hardness test with the maximum and minimum values
for the controlled range of the hardness.
For example, we have two steel sample of known hardness of HRC, and device
shows a stable deviation for hardness measurements on it. For making user two-
point calibration select in main menu Calibration:
