Micromeritics ACCUPYC II 1345 Operator's Manual page 170

12 Maintenance and Troubleshooting
3. If the system was previously open, manually purge the system before proceeding:
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. Once the sample chamber fills to the appropriate pres-
sure, press 7 to close the Fill valve.
c. Press 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 pres-
sure should not decrease more than 0.007 psig (0.048 kPag) or increase more than 0.02 psig
(0.14 kPag) in a two minute span.
If the pressure does not decrease more than 0.007 psig (0.048 kPag) or increase more
n
than 0.02 psig (0.14 kPag) in a two minute span, proceed to step 8.
If the pressure decreases more than 0.007 psig (0.048 kPag) or increases more than 0.02
n
psig (0.14 kPag) in a two minute span, 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 indic-
ated. 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.
10. Press 7 to close the Fill valve; X - O - X.
11. Observe the pressure display. After an equilibration period (about 20 to 30 seconds), the pres-
sure should not decrease more than 0.007 psig (0.048 kPag) or increase more than 0.02 psig
(0.14 kPag) in a two minute span.
If the pressure decreases more than 0.007 psig (0.048 kPag) or increases more than 0.02
psig (0.14 kPag) in a two minute span, temperature instability or a leak may be indicated. Vent
the system, then repeat steps 8 through 11 several times to verify that a leak is indicated. If a
leak is indicated, call a Micromeritics Service Representative.
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AccuPyc II 1345 Operator Manual
134-42851-01 (Rev A) — Jan 2021