10
CALIBRATION
Your Ohaus Balance was calibrated before shipment, however, calibration can be
affected by changes in location, temperature, or rough handling. Your balance
can be calibrated in two ways: Span calibration or Linearity calibration. Span
calibration resets the balance's weighing range using two weight values: zero
and a weight value at or near the balance's capacity. Linearity calibration mini-
mizes deviation between actual and displayed weights within the balance's weigh-
ing range. Three weight values are used: zero, a weight value within the balance's
weighing range and a weight value at or near the balance's specified capacity.
CALIBRATION MASSES
Before beginning calibration, make sure masses are available. If you begin cali-
bration and realize calibration masses are not available, exit the procedure by
pressing and holding MODE OFF until balance returns to weigh mode. The bal-
ance will retain previously stored calibration data. Calibration should be per-
formed as necessary to ensure accurate weighing. Masses required to perform
the procedures are listed in the following table.
CALIBRATION MASSES
LINEARITY SPAN ONLY
MASSES MASS
50g/100 100g
SPAN CALIBRATION
1. With the balance turned ON, press and hold O/T ON until
CAL is displayed.
2. Release O/T ON ,
-C- is momentarily displayed followed by the value of the
calibration mass which is to be placed on the pan.
Do not disturb the balance when
-C- is displayed.
Incorrect calibration may result.
3. Place the indicated span calibration mass on the pan.
4. Press O/T ON,
-C- is momentarily displayed, then the weight of the mass
on the pan is displayed.
5. Remove the calibration mass from the pan. The balance is now calibrated
and returns to the weighing mode.
Masses must meet or exceed ASTM Class 1 Tolerance.
Calibration masses are available as accessories.
