AQUATRAN 3/38 Operator’s Manual
Testing Film Samples
MOCON, Inc.
Revision G
6-5
Using a Generated RH Test Gas
The AQUATRAN 3/38 has the capability of generating a controlled RH from 5 to 90% for the Test Gas. A
Generated RH Test Gas is created by moving pressurized gas through a humidifier filled with HPLC-grade
water and mixing the wet gas with a dry gas in the appropriate ratios.
To use a Generated RH the sponge (when present) is removed from the cavity in the bottom Test Gas Plate
and the Test Gas RH controls on the Instrument tab of the Test screen are set as required.
Filling the Humidifier
Before starting a test requiring RH generation the level in the humidifier should be checked and filled if
necessary. Follow these steps to fill the humidifier:
Note: Refer to Figure 6-1 for the location of the referenced controls.
1.
Open the door on the instrument to access the Humidifier.
2.
Check the water levels to determine if there is sufficient water to perform the test.
3.
Fill a syringe with HLPC-grade water and attach short piece of tubing to the luer fitting.
4.
Push the end of the tubing onto the Fill/Drain Port fitting.
5.
Open the Fill Valve by turning it 2-3 turns counterclockwise.
6.
Push in the plunger on the syringe to force the water into the reservoir.
7.
Close the Fill Valve and remove the syringe.
Filling the Humidifier during a Test
During a long test requiring RH generation the level in the humidifier should be checked periodically and
filled if necessary. Follow these steps to fill the humidifier during a test:
Note: Refer to Figure 6-1 for the location of the referenced controls.
1.
Open the door on the instrument to access the Humidifier.
2.
Check the water levels to determine if there is sufficient water to perform the test.
3.
Put the instrument in ByPass using the GoTo control.
4.
Fill a syringe with HLPC-grade water and attach short piece of tubing to the luer fitting.
5.
Push the end of the tubing onto the Fill/Drain Port fitting.
6.
Open the Fill Valve by turning it 2-3 turns counterclockwise.
7.
Slowly push in the plunger on the syringe to force the water into the reservoir.
