78
Two point calibration
Conditions
– Instrument must be switched on for at least 10 minutes for thermic stabilization .
– The range between the 2 calibration points must be
≥
100 µm.
– For calibration, the instrument must be set to the highest sensitivity.
– The analogue display has to be set to automatic.
– You may use one of the following means for calibration: Calibration probes - measure-
ment standard - gauge blocs.
– You can calibrate only a single input channel, A or B. The HOLD push button allows you
to bypass the calibration of the selected input channel.
For the following example we are using two calibration probes with the values of 1000 µm
and -1000 µm.
– Switch off the instrument.
– Put the selector 3
on position calibration.
– Switch on again.
– The channel A is set as standard. Following symbols CAL and
show up.
– Plug into A the first calibration probe (-1000 µm).
– Set the display to the value of the calibration probe, use the function keys:
– Confirm this first value by means of the
key.
– This action will be confirmed by the display of a second triangle
, which means the
begin of the second calibration phase.
– Input the second calibration value (1000 µm) into channel A.
– Set the display to the value of the calibration probe, as before.
– Confirm the second phase by means of the
key.
– The channel B is automatically selected. The symbols CAL and
show up on dis-
play.
– Plug into B the first calibration probe (-1000 µm).
– Set the display to the value of the calibration probe, as before.
– Confirm this first value by means of the
key.
– This action is confirmed by the display of a second triangle
, which means the
begin of the second calibration phase.
– Input the second calibration value (1000 µm) into channel B.
– Confirm the second phase by means of the
key.
M
M
M
M
