Controls And Displays - Seca 242 Manual De Instrucciones Y Garantía

4. Operation

Controls and displays

Calibration (
seca 242
Calibration is required only if the bottom end of the measuring rod is not exactly on the
standing surface. The drill may have slipped during mounting or you may deliberately have
selected a different fixing height to vary the measuring range.
Calibration need only be performed once.
– Keep the ZERO key depressed and
then switch on the display housing by
pressing the START key.
A flashing number appears – this is the
calibration counter.
– Release the ZERO key and then press
it again for at least 1.5 seconds.
– Put a metre stick or other known meas-
ure underneath the head stop.
– Compare the value displayed with the
actual value. They should match.
20
only)