AND PT Series Instruction Manual page 24

To reduce errors caused by water temperature
Use the correct Z factor. To obtain the correct Z factor, measure the water temperature using the
accessory thermometer and enter the value in WinCT-Pipette.
For a stable water temperature, allow the temperature of the test liquid to acclimatize to the
measurement environment for an appropriate duration of time (ISO 8655 recommends two hours
or more) before measurement.
Vibration
Vibration yields unstable measurement values.
To reduce errors caused by vibration
Install the balance in a stable place avoiding vibration and shock. Use a solid weighing table that is
free from vibration.
If the installation site is the second floor or higher, use the AD-1685 anti-vibration table.
Air flow
Air flow in the measurement environment yields unstable measurement values
To reduce errors caused by air flow
Install the balance where it is not affected by heaters or air conditioners or where no drafts exist.
Especially when using the AD-4212B-PT / AD-4212A-PT with a minimum weighing value of 0.01
mg / 0.1 mg, use much care in choosing an installation site or cover the weighing unit.
Operator
An operator's pipetting technique influences measurements.
To reduce errors caused by the pipetting technique
Learn and use the correct pipette technique.
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