DIAVITE AG DIAVITE Compact VH Manual - Page 9
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2.1.4 Calibration
The DIAVITE DH-7 has an automatic calibration, which is at disposal in the menu 'configuration' (
10). In order to avoid faulty measurements, it is absolutely indispensable to check the perfect function of the
instrument before starting the first daily application, as well as in regular periods of time. This can be effected the
easiest way by measuring the surface of a roughness specimen. The measured roughness value is compared
then with the nominal value indicated on it and – if necessary – a new calibration of the instrument must be
effected.
If a tracer is exchanged, the instrument has to be recalibrated. The deviations between the various
tracers should be rather small normally, but could anyhow cause faulty measuring results. The
instrument can be recalibrated automatically. The settings must be correctly.
You will find a detailed description of calibration on page 6 (point 1.7)
The calibration is always effected with cutoff 0.8 mm (lt=4.8 mm)
2.1.5 Remote control
The traverse unit is equipped with a multifunctional blue remote control button to switch the instrument
on, or – if already switched on – to release the measuring operation. When employing the DIAVITE as
one-handed operated instrument or with a measuring stand, this button is inactive.
2.2
Selection of the traversing length
The cutoff filters serve to eliminate the long wavy parts of the roughness (waviness). They correspond
to the usual standards (BSI, ASA, DIN) and are coupled with the traversing length.
Measuring length Lt
The cutoff should be selected according to the standards valid in your country. If no indications are
given in drawings, the cutoff 0.8 mm is normally used.
2.3
Tolerance
In this menu any tolerance value for Ra, Rt od Rz can be set. If the value set is exceeded after a
measurement, the indication begins to flash, and in the corner top right appears – if a tolerance is set
– the sign
.
↓ ↓ ↓ ↓
2.4
Memory functions
The instrument has a memory function which is switched-on and –off in the captioned menu. With that
function, it is possible to hold up to 15 measuring values, which can be transferred over the serial
interface to a suitable PC, or printed out with the PC. As an acknowledgement, the roughness values
are taken over to the memory.
If the memory function is active, an "M" appears in the display.
2.5
Key lock
The instrument is equipped with a key lock preventing any settings being changed by mistake during
measuring procedure. It is effective for the buttons lt (length of traverse), and lc (cutoff).
After having set the parameters, push the button
indication 'locked' appears. In order to suspend the key lock, repeat the described procedure, until the
indication "unprotected" appears.
DIAVITE COMPACT
Traversing length lm
mm
1.5
4.8
15.0
mm
1.25
4.0
12.5
and then again the button
8
Cutoff Lc
mm
0.25
0.8
2.5
as long until the
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