.
.
© 2012 Proceq SA
14
Operation of the devices
The hardness of a paper roll depends on a number of
parameters which can influence the hardness. For exam-
ple the quality of the cellulose, paper density, paper or
sheet thickness, temperature, moisture and naturally the
various parameters of the paper machines themselves
(rolling and unrolling speed, web tension, web guide etc.)
must be mentioned in this context.
All these parameters affect the measuring results of the
measuring devices to varying degrees. For these rea-
sons it is not possible to give any exact information on
conversion and the conversion range.
The aim of these conversions is:
- To permit switchover from the Schmidt process to the
improved PAROTESTER process.
- To provide direct comparison of the hardness values to
permit transfer of experience and specified quality crite-
ria from one system to the other.
Conversion settings:
Press the «MENU» key to return to the main menu
where conversion can be selected with the cursor ( Fig.
30 ).
Press the
No conversion
Conversion:
«
START
» key
selected
P
g
LR selected
Fig.30 Fig.31 Fig.32
The respective conversion is set by pressing the arrow
keys (
h
/
i
) Fig. 31 / 32 .
The conversion of the L-values into R-values
( Schmidt - Hammer ) is only possible for the impact
device type U and type P. The selected conversion to the
R-value is shown on the display.
Date / time
Press the «MENU» key to return to the main menu where
the «Date/time» menu item can be selected with the
arrow keys (
h
/
i
) ( Fig. 33 ).