Inficon Ecotec E3000, Technical Handbook

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5-2
Detecting Specific Gases
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6.5 Hydrogen / Forming gas
When detecting hydrogen (as contained in forming gas) the response time of the
Ecotec E3000 will be longer than for refrigerants.
Please allow for the following minimum measuring times when detecting hydrogen /
forming gas.
When working with hydrogen (forming gas), the leak rate may also be displayed as
gas equivalent leak rate. See Section
4.4.3 for details.
When detecting hydrogen the warm-up time before the first calibration should be
extended to 1 hour.
The smallest detectable leak rate for hydrogen will be 1 * 10
-6
mbarl/s (higher than
for refrigerants).
When detecting hydrogen / forming gas, a ECO-Check reference leak (cat. no. 521-
001) may be connected to the Ecotec E3000 remotely and used for internal
calibration of hydrogen (forming gas).
6.6 Methan
Notice: The setting for methane is commonly used for the detection of leaks of
natural gas which mainly consists of methane.
Methane cannot be calibrated with the built-in ECO-Check reference leak as
methane can only be detected on mass 15 (which is outside the range of 40 to 105
which is allowed for internal calibration).
A test leak with a leak rate of > 14 g/a is required for external calibration of the Ecotec
E3000.
An external test leak “TL4-6 for methane” is available from INFICON as part no.
12249 for this purpose.
Sniffer line Min. measuring time
3 m 2.7 s
5 m 3.0 s
10 m 3.8 s
15 m 5.0 s