INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector - Manual (Page 54)

54
6 Operation
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If you work with hydrogen (forming gas), you can have the determined leak rate also
displayed as gas-equivalent leak rate,
see “6.4.3 Gas equivalent to helium and hydrogen,
settings for diluted gas”, page 40 .
If you want to verify hydrogen, the warm-up phase of the device must be extended to
1 hour before the first calibration.
The smallest detectable leak rate of the Ecotec E3000 for hydrogen is 1
 10 -6 mbar l/s
(higher than for refrigerant).
You can use a PRO-Check calibrated leak for the internal calibration of hydrogen / forming
gas. Because the PRO-Check calibrated leak does not fit into the opening on the front
panel of the Ecotec E3000, you have to connect it with a SUB –D cable, see installation
manual of the ECO-Check.
Methane Methane cannot be calibrated with the built-in ECO-Check because methane can be
detected only on mass 15 (which is outside the range for the permissible internal
calibration from 40 to 105).
Therefore use the external calibrated leak “TL4-6 for methane” for calibration.
6.9 Switching off the device
You can switch off the Ecotec E3000 at any time with the mains plug (position “0”). It takes
a few minutes for the turbo molecular pump to come to a standstill. The Ecotec E3000
must not be moved during that time.
The parameter set in the Ecotec E3000 are saved. After the start-up, the Ecotec E3000
returns to the same state that it was in before it was switched off.
Table 9: Minimum measurement times for hydrogen
Length of sniffer line Minimum measurement time
3 m 2.7 s
5 m 3.0 s
10 m 3.8 s
15 m 5.0 s