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Operational
Q u alification (O Q
）
Automatic Polarimeter
AP-300
The accuracy and the repeatability as well as the span of the AP-300 can be checked by
measuring various points within the measurement range. This performance test is almost
equivalent to calibration.
The accuracy of the AP-300 is expressed as ±0.0X°. The accuracy is written like so: Angle of
rotation measurement value±0.0X°.
4. Items to Prepare
1) Standard quartz control plate
（
with traceability certificate)
Available from ATAGO
Part number
RE-72045
Quartz control plate 34°
Part number RE-72044
Quartz control plate 17°
Part number RE-72043
Quartz control plate 8°
※
U
se a Quartz control plate with an angle of rotation similar to the samples usually
measured.
Quartz control plates, unlike sucrose solutions, require minimum preparation. To
ensure accuracy, the angel of rotation and International Sugar Scale are certified to
two decimal places and are documented on the traceability certificate included with
each quartz control plate.
2) If a quartz control plate is not available, prepare a standard sucrose solution of 100 °Z
(Refer to
※
below) in a 200mm observation tube.
3) Recording chart for measurement data
※
How to make standard sucrose solution of 100°Z
Put 26.000g of pure sucrose in a graduated cylinder and add distilled water to the
pure sucrose, until the total volume is 100ml.
5. Preparation of Instrument
1)
Turn on the power of the AP-300. The measurement screen appears 3 seconds after the
opening message is displayed. If an exclusive printer is connected, the opening message
will be printed out.
2)
Leave the unit on for at least 30 minutes.
3)
Make sure “MODE-1” is displayed on the measurement screen.
4)
Check the date and time on the display screen of the Automatic Polarimeter AP-300.
5)
If using an exclusive printer, check the settings of the printer.
Set the date, time, average values, sample numbers, etc.
Measurement values displayed on the LCD will be printed out.
6) For measurements of standard quartz control plates, ensure the unit is set to read in the
Angle of Rotation Scale. For measurements of standard sucrose solutions, ensure the unit
is set to read in the International Sugar Scale (with Automatic Temperature
Compensation).
* The printer paper supplied with the printer is a heat-sensitive rolled paper. ATAGO
