AccuPyc II 1340
Maintenance
Aug 2013
5-7
Checking the Cell and Expansion Chambers for Leaks
Perform the following procedure to check the cell and expansion chambers for leaks. The
valve states are shown at the end of each pertinent step (steps in which valve actions have been
taken). The first character represents the Fill valve, the second character represents the
Expansion valve, and the third character represents the Vent valve .
1.
Allow the pycnometer to equilibrate thermally in a room having a stable temperature.
2.
Press
Alt + 1
to enter manual mode.
3.
If the system has been open, manually purge the system before proceeding as follows:
a. Press
8
to open the Expansion valve and
9
to close the Vent valve;
X - O - X
.
b. Press
7
to open the Fill valve; fill the sample chamber to the desired pressure.
c. Press
7
to close the Fill valve and
9
to open the Vent valve;
X - O - O
.
d. Repeat this procedure two or three times.
e. Press
8
to close the Expansion valve;
X - X - O
.
4.
Press
7
to open the Fill valve;
O - X - O
.
5.
Fill the sample chamber to 19.5 psig.
6.
Press
7
to close the Fill valve;
X - X - O
.
7.
Observe the pressure display. After an equilibration period (about 20 to 30 seconds), the
pressure should not vary more than 0.005 psig/min.
• If the pressure does not vary more than 0.005 psig/min, proceed to step 8.
• If the pressure varies more than 0.005 psig/min., temperature instability or a leak may
be indicated. Vent the system, then repeat steps 4 through 7 several times to verify that a
leak is indicated. If a leak is indicated, call a Micromeritics Service Representative.
8.
Press
9
to close the Vent valve,
8
to
open the Expansion valve, and
7
to open the Fill
valve;
O - O - X
.
9.
Fill the chambers to 19.5 psig.
Before performing this procedure, check the chamber cap to ensure that it is not the
source of leaks. It should be free from particles, the O-ring should be properly seated,
and it should not contain excessive grease.
Summary of Contents for AccuPyc 2 1340
Page 1: ...AccuPyc II 1340 Operator s Manual V1 09 134 42801 01 Oct 2013...
Page 2: ...Micromeritics Instrument Corporation 2006 2013 All rights reserved Printed in the U S A...
Page 4: ......
Page 8: ...Table of Contents AccuPyc II 1340 iv Aug 2013...
Page 18: ...Specifications AccuPyc II 1340 1 10 Aug 2013...
Page 72: ...System Commands AccuPyc II 1340 3 38 Aug 2013...
Page 84: ...Reviewing Data AccuPyc II 1340 4 12 June 2013...
Page 100: ...Ordering Information AccuPyc II 1340 6 6 Sep 2013...
Page 116: ...Appendix B AccuPyc II 1340 B 4 Aug 2013...
Page 120: ...Appendix C AccuPyc II 1340 C 4 June 2013...
Page 128: ...Appendix D AccuPyc II 1340 D 8 Nov 06...
Page 136: ...Appendix G AccuPyc II 1340 G 2 Oct 08...
Page 138: ...Appendix H AccuPyc II 1340 H 2 Nov 06...
Page 152: ...Appendix K AccuPyc II 1340 K 4 Apr 07...
Page 157: ...AccuPyc II 1340 Index June 2013 Index 5 Zero pressure offset 1 5 Zero pressure transducer 3 37...
