Rice Lake Discovery Series Semi-Micro and Analytical, Ohaus - Manual (Page 33)

EN-29 Ohaus Discovery
3.5.11 Pipette Calibration (Cont.)
IMPREC % 0.000000 is displayed. Edit the value and press the Yes button. This value is speci-
fied on the Pipette. The example used was 5.000000 %. Press the Yes button to accept.
SAMPLE SIZE 10 is displayed. Using the Yes, No and Back buttons, change the sample size. The
example shown uses 5 samples. When sample size is entered, press the Yes button.
The balance is now ready to accept samples. It is essential that the balance be located
on a stable, vibration free surface and away from any drafts caused by heating and or
cooling outlets. The balance is very sensitive to external influences. When samples are
administered, the draft shield doors must be closed. Failure to adhere to these practices
will result in incorrect results.
0.0000 g SAMPLE 1 (blinking) is displayed. Place the receptacle container on the pan and press
the
Tare button.
Place the first sample in the container, SAMPLE 1 will blink, press the Function button the display
will now momentarily show the microliter value then tares out the value for the next sample. Place
the remaining samples making sure the secondary display is indicating the next sample before
placing it into the container. The weight of each sample is shown during the calculation period.
When all of the samples have been taken, the balance calculates the Inaccuracy and Imprecision
either as a pass or fail in percentage. The examples shown here indicate passing.
Press the Function button to toggle between inaccuracy and imprecision displayed values.
To Establish New Pipette Parameters
Press and hold the
Mode button until PIPETTE is shown on the secondary display.
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