Development and manufacturing of non-
destructive testing equipment and system
Hardness tester NOVOTEST T-UD3
43
For recalibration any of these presetted calibrations, you have to
perform one or two point user calibration for the Steel/HLD cell
(press “SCALE” key), because all available scales are converted in
accordance with ASTM E140 from the basic Leeb scale.
In order to perform one or two point user calibration, follow the same
instructions as for user calibration the UCI probe (See paragraph
11.2.).
11.2. User (additional) calibration (UCI probe)
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 scale needed one (single-point
calibration) or two (two-point calibration) standard hardness tests
samples 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
:
