22
Instruction Manual C200
3.4 Description of the calibration mode
Turn the encoder clockwise ( CW ) to select the
CALIBRATION
menu and then push the encoder button
to access the menu.
Three functions are available in the calibration mode :
1. Zero adjustment ( one master,
CAL.1
flashes ) or calibration ( two masters,
CAL.1
/
CAL.2
flashes )
2. Mechanical probe setup (
AdJuSt
flashes )
3. Exit menu (
rEturn
flashes )
Turn the encoder to select the desired function and then push the encoder button to access the function.
3.4.1 Zero adjustment / Calibration :
If the
CALIBRATION
menu has been selected, the display will alternately change from
CAL. 1
to the currently measured value. Now, place the master or one of the masters in the measur-
ing device ( or insert the gauge head into one of the masters ). Push the encoder button to
perform an automatic
Zero adjustment
or as the case may be, initiate a
Gauge calibration
.
Zero adjustment
( only one master was entered in the
MASTER VALUE
menu ) :
The master value is adopted as measurement value by the gauge, and the column gauge
returns to the measuring mode.
Gauge calibration
( two masters were entered in the
MASTER VALUE
menu ) :
At the start of the automatic gauge calibration, the first master value was measured,
and the numeric display alternately indicates
CAL. 2
and the measured value.
Now, place the second master in the measuring device ( or insert the gauge head into the
second master ) and confirm by pushing the encoder button.
The column gauge then computes the new offset value and the amplification ( pneumatic :
spread ).
The second master value is then adopted as measurement value by the gauge and the
column gauge returns to the measuring mode.
Note :
Zero adjustment or gauge calibration can also be triggered by a timer forced mode. This
function is programmed in the “BASIC SETUP” menu, submenu “L9 - Timer forced calibra-
tion” and is described in chapter 3.6.
Attention :
Once a gauge has been calibrated with 2 masters, the amplification ( pneumatic :
spread ) determined for this gauge is permanently stored inside the C200. Hence, for
measuring operation the C200 could be switched to zero adjustment using only 1 master.
If this gauge is later on reprogrammed for a different measuring task using only a one mas-
ter adjustment, then the amplification stored for this gauge must be deleted. The ecoder but-
ton is held pressed for at least 5 seconds during zero adjustment ( as described above, the
display will alternately change from
CAL. 1
to the currently measured value ) in order to do
so. All offset and amplification data is then deleted. A zero adjustment of the gauge must be
performed afterwards.