Ohaus C 305 ELECTRONIC BALANCE - Manual (Page 54)

9
CALIBRATION CALIBRATION CALIBRATION CALIBRATION CALIBRATION
Portable Plus balances are calibrated
before shipment, however, calibration
can be influenced by factors such as:
•
Variations in the earths gravitational
field at different latitudes of the world.
•
Rough handling.
•
Changes in work environment.
•
Height above sea level.
Calibration should be performed before
using the balance to ensure accurate
weighing.
Portable Plus balances can be calibrated
in two ways:
Span Calibration Span Calibration Span Calibration Span Calibration Span Calibration resets the balance’s
weighing range by checking 2 points:
zero and a weight value within the bal-
ance’s range.
Linearity Calibration Linearity Calibration Linearity Calibration Linearity Calibration Linearity Calibration resets the
balance’s weighing range by checking 3
points; zero and two different weight
values within the balance’s range. This
also helps minimize deviations between
actual and displayed weights throughout
the range.
A 200 g calibration weight is supplied
with the balance for performing Span
Calibration. Linearity calibration requires
an additional 100 g weight which is avail-
able as an accessory.