Page 105 - SICCO catalog

Performance at a glance.
OPENING AND CLOSING THE TRANSFER CHAMBER
Test procedure:
Due to the constant gassing with nitrogen the relative humidity inside a glove box with transfer chamber is 15 %. A SICCO Gas Dosing Controller
is connected during the lead in of nitrogen in order to control the gas supply. A SICCO Gas-saving Valve is connected to the outlet for aeration. In the Gas Dosing Controller, the attainable required humidity is adjusted to 10 %, the flow rate to 8 Liters / minute and the pressure reducer on the nitrogen bottle to 0,5 bar. The transfer chamber is not purged with gas. The relative humidity inside the transfer chamber is 47 % at the beginning of the test procedure. The door of the transfer chamber in direction of
the workspace is opened completely for 30 seconds. The curves show the relative humidity versus time.
Results:
Due to the opened door of the transfer chamber in direction of the work- space the relative humidity inside increases slightly to approx. 20 %. After approx. 10 minutes the initial value is reached again by re-supply of gas.
INTERRUPTION OF GAS SUPPLY
Test procedure:
Due to the constant gassing with nitrogen the relative humidity inside a glove box with transfer chamber is 15 %. A SICCO Gas Dosing Controller is connected during the lead in of nitrogen in order to control the gas supply and monitor the relative humidity. The attainable required humidity is adjusted to 10 %, the flow rate to 8 Liters / minute and the pressure reducer on the nitrogen bottle to 0,5 bar. The Gas Dosing Controller is turned off to interrupt the gas supply. The glove box and the transfer chamber remain closed tightly until the end of the test. The curves show the relative humidity versus time.
Results:
Through the aeration tubing, there is a slight air exchange despite the Gas-saving Valve. After approx. 1 hour, the relative humidity is approx. 20%, after more than 14 hours the relative humidity is at the same level as the ambient air. Despite the short-term missing power supply, the atmosphere inside the workspace of the glove box is only slightly influenced.
Relative humidity
%
25
22,5
20
17,5
15
12,5
10
7,5
5
2,5
0
Glove Box Opening and closing the transfer chamber » room temperature 22 °C
Relative humidity
%
35
31,5
28
24,5
21
17,5
14
10,5
7
3,5
0
Glove Box Interruption of gas supply » room temperature 22 °C
Hotline +49 (0) 93 46-92 86-0
2:12
4
4:24
8
12
6:36
16
8:48
20
min
The initial value is attained after approx. 10 minutes.
11
h
Only 10 % of increase within 8 hours.
95
Technische Informationen