INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector - Manual (Page 53)

6 Operation
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6.8 Special features of individual gases
R134a: Influence of
cyclopentane and
R245fa If you are sniffing for R134a, the presence of cyclopentane and R245fa can lead to incorrect
measurement results. Search for R134a with alternative mass position 83, if cyclopentane
and R245fa could be sniffed. Setting another mass,
see “Mass and position”, page 36 .
R600a: Influence of
cyclopentane and
isopentane If you are sniffing for R600a, the presence of cyclopentane and isopentane can lead to
incorrect measurement results. Search for R600a with the IGS mass position, if
cyclopentane and isopentane could be sniffed. Setting the IGS-mass position,
see
“6.4.4 Suppressing interfering gases (Sophisticated interfering gas suppression - IGS)”,
page 41
.
Special features with
helium If you are sniffing for helium, the Ecotec E3000 needs longer for an analysis than with
refrigerants. Therefore stick to the following times during which you will not move the
sniffer tip.
The smallest detectable leak rate of the Ecotec E3000 for helium is 1
 10 -6
mbar l/s (higher
than for refrigerant).
You can use a PRO-Check calibrated leak for the internal calibration of helium. 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.
If you are working with diluted helium, you can have the determined leak rate also
displayed as the gas-equivalent leak rate. For additional details,
see “6.4.3 Gas equivalent
to helium and hydrogen, settings for diluted gas”, page 40 .
Special features with
hydrogen / forming gas If you are sniffing for hydrogen / forming gas, the Ecotec E3000 needs longer for an
analysis than with refrigerants. Therefore stick to the following minimum measurement
times.
Page 9: Info RS-232
Ecotec E3000
 Sniffer
ASCII string Command sent from main device to sniffer line
Sniffer
 Ecotec E3000
ASCII string Command sent from sniffer line to main device
The information in the first two lines can be switched with the keys “Sniffer” and “Leak”:
Ecotec E3000
 Leak
ASCII string Command sent from main device to test leak
Leak
 Ecotec E3000
ASCII string Command sent from test leak to main device
Host
Ecotec E3000
ASCII string Command sent from mainframe to Ecotec E3000
Ecotec E3000
 Host
ASCII string Command sent from Ecotec E3000 to mainframe
Table 7: Device information (cont.)
Menu item Format Description
Table 8: Minimum measurement times for helium
Length of sniffer line Minimum measurement time
3 m 2.2 s
5 m 2.5 s
10 m 3.3 s
15 m 4.5 s