Installation
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6
Use the appropriate foot pedal to add/remove gas to/from the Glovebox to reach a pressure
of 11.0 mbar.
7
Using a timer, wait 25 minutes and observe the current box pressure.
•
If the pressure has not decreased more than 1 mbar in this time period, the Glovebox is
leak tight.
•
If the pressure drops more than 1 mbar, check all of the connections that were made
during the assembly process. Contact your
MRC
, Inc. representative if you require
.assistance in troubleshooting
3.7.4 Purging
The purpose of purging the system is to displace the air in the box with the inert gas of your
choice. It is extremely important to displace as much of the air as possible prior to circulating
the inlet gas through the purifier column. It is advisable to use at least three cylinders of gas per
Glovebox module during this purging procedure and to reduce the O2 and H2O levels to less
than 50 ppm.
Note:
If you have a freezer, the door should be open during purging.
The purging method is as follows:
1
Set the Working Maximum pressure to +10.0 mbar and the Working Minimum Pressure to
+5.0 mbar See
on page
2
Open the manual purge valve located on the top left of the box. If your Glovebox system is
fitted with an Auto Purge valve, refer to
on pag
3
Adjust the flow using the purge valve so that there is a steady flow of incoming gas and the
box pressure is maintained at >1mbar.
4
Create turbulence in the box to increase the efficiency of the purge. This can be done by
pressing in the gloves and waving inside the box or installing a small electric fan inside the
box.
5
During the purge process you will need to change the working gas cylinder as it empties.
You must close the purge valve before changing the cylinder.
6
Re-open the Purge valve after replacing the cylinder and opening the valve on the cylinder.
7
Purge the system with at least 3 cylinders of inert gas for a standard 2-glove system.
Note:
If you do not have an Oxygen Analyzer, it can be assumed that after purging with
three (3) cylinders (for a single 2-glove system), the Oxygen content in the box is 25 ppm or
less. Close the Manual Purge valve.
8
Open the outlet valve of the O2 analyzer, then open the inlet valve. Make sure that the
batching pump has power. It should be plugged into the power strip. The power strip should
be plugged into the wall outlet. Within 15 minutes, you can read the Oxygen content on the
display.
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