Micromeritics AccuPyc 1330, Operator'S Manual

Page: 47 / 115

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. Place an empty cup in the cell chamber.
2. Replace the cell chamber cap.
3.
Press to begin the calibration procedure.
Display Entry
Enter the volume of the calibration standard
and press
.
Range: 0.1 to 999.0000 cm
3
Press to begin the calibration or
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.
In most cases, use one ball for the 100-cm
3
pycnometer; two balls for
the 10-cm
3
pycnometer. For best results, sample volume should be ap-
proximately equal to the volume of the calibration standard. Therefore,
if you are calibrating the 10-cm
3
pycnometer for use with smaller sam-
ple volumes, you may wish to use only one ball.
Replace the cell chamber cap; then press
. When you press , calibration
continues and operational status messages are
continually displayed.
•
Volume of cal std:
1.0000 cm
3
ENTER
[Enter] to start
[Escape] to cancel
ENTER
CLEAR
Insert cal std
[Enter] to start
ENTER ENTER
AccuPyc 1330 Calibrating the Pycnometer
September 1996 4-15