Calibrating The Pycnometer - Micromeritics AccuPyc 1330 Operator's Manual

AccuPyc 1330

Calibrating the Pycnometer

You should check or calibrate the pycnometer anytime you restart it. For a
quick check, run an analysis with an empty cup to see how close the average
volume is to 0. It should be ±0.05% of full-scale. If it is not within ±0.05%
of full-scale, calibrate according to the instructions given below. When you
calibrate the pycnometer, cell volume and expansion volume in the set-up pa-
rameters are updated automatically.
When calibrating the pycnometer, you should set up your calibration pa-
rameters so that 10 purges and 10 runs are performed. See the section
on Analysis or Calibration Parameters later in this chapter.
1.
2.
3.
In most cases, use one ball for the 100-cm
the 10-cm
proximately equal to the volume of the calibration standard. Therefore,
if you are calibrating the 10-cm
ple volumes, you may wish to use only one ball.
September 1996
Place an empty cup in the cell chamber.
Replace the cell chamber cap.
•
Press to begin the calibration procedure.
Display
Volume of cal std:
3
1.0000 cm
[Enter] to start
[Escape] to cancel
Insert cal std
[Enter] to start
3
pycnometer. For best results, sample volume should be ap-
Entry
Enter the volume of the calibration standard
and press .
ENTER
Range: 0.1 to 999.0000 cm
Press to begin the calibration or
ENTER
CLEAR to cancel the calibration.
Status messages are displayed during the first
phase of calibration. When the first phase
ends, the pycnometer beeps three times.
Place the calibration standard* in the cup in
the cell chamber.
3
pycnometer; two balls for
3
pycnometer for use with smaller sam-
Replace the cell chamber cap; then press
. When you press
ENTER
continues and operational status messages are
continually displayed.
Calibrating the Pycnometer
3
, calibration
ENTER
4-15