Micromeritics 1305 Operator's Manual page 31

Model 1305 MultiVolume Pycnometer
7. If analysis is to be performed in the 150-cm
chamber, perform the following steps to remove it:
a. Place the VENT valve in the OPEN position, then turn the VENT RATE
b. Place the FILL valve in the OPEN position. This allows the gas pressure
8. Ensure that the FILL valve is in the CLOSE position.
9. Place the PREP/TEST valve in the TEST position.
10. Place the >5/<5 valve in the >5 position and the >35/<35 valve in the >35
position.
11. Ensure that the VENT valve is in the OPEN position.
12. Replace the sample chamber cap.
13. Place the FILL valve in the OPEN position. Allow gas to flow through the
instrument for approximately five minutes. Use a mid-range setting on the
FILL RATE and VENT RATE valves.
14. Place the FILL valve in the CLOSED position; wait until the pressure read-
ing falls and becomes stable.
15. Adjust the ZERO control to indicate +0.000.
16. Place the valve in the position appropriate for the sample volume range (and
insert) you plan to use (refer to the following illustration):
•
Under 5 cm
valve in the <35 position
•
5 to 35 range, place the >5/<5 valve in the >5 position and the >35/<35
valve in the <35 position
•
35 to 150 range, place the >5/<5 valve in the >5 position and the
>35/<35 valve in the >35 position
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control several turns counterclockwise to open it.
to ease the insert up gently until it can be grasped. Do not force the in-
sert to move rapidly; it will come out easily if allowed a few seconds.
3
, place the >5/<5 valve in the <5 position and the >35/<35
3
range and an insert is in the
Startup
3-9