OX-TRAN Model 2/22 Operator’s Manual
Maintenance
MOCON, Inc.
Revision R
7-3
Cleaning the Test Cells
Periodically the test cells should be cleaned to remove any excess buildup of grease. Alcohol can be used
to remove any residue from the Apiezon grease.
Inspect the gas ports and TrueSeal flush ring and remove any grease that could obstruct the flow of gas.
Maintaining the Test Cells
Periodically the test cells should be examined and any damaged, deformed, cracked or brittle o-rings
replaced. The parts of the test cell and their associated part numbers are illustrated in Figure 7-2 and
Inspect the film sealing surface of the top half of the test cell for nicks and scratches. Dragging a finger nail
across a nick or scratch is a simple way to estimate the depth of the flaw. Nicks and scratches deep enough
to feel may cause errors in the transmission rate due to leakage.
Drying Out the Humidifiers
Before shutting down the instrument for long term storage or repair the Humidifiers must be drained and the
chambers dried out to prevent any corrosion from occurring during storage or transport.
To prepare the Humidifiers for storage or transport follow the procedure below:
1.
Advance all active tests to the Idle state.
2.
Open the cover on the front of the instrument to access the Drain Port and Drain Screws.
For more information see Figure 5-1and Table 5.1 for the location of the drain port and
screws.
3.
While holding a container under the drain port, open the drain screws for both humidifiers.
4.
The pressure of the Carrier and Test gases will force all of the water out of the humidifiers.
5.
After the humidifiers have been drained allow gas to vent out the drain port until all residual
water that is visible has been removed.
6.
Tighten the drain screws.