8 special features of individual gases, Special features of individual gases – INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector User Manual

Page 53

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6 Operation

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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

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