INFICON Operation | 6
Ecotec E3000-Operating-instructions-kina22en1-28-(2211) 37 / 104
If the gas concentration drips after setting the ZERO point, a negative measured value
should be displayed. In order to avoid that, the ZERO point is revised downward if the
measured value is negative for the duration of the “ZERO time,” see below.
The ZERO point is not automatically revised up(wards). It is therefore important to
regularly reset the ZERO point.
The ZERO point can be set with the left button on the handle and with the “ZERO”
button in the measurement view.
You can activate or deactivate the buttons here in this menu. Deactivation prevents
the function from being triggered inadvertently and an incorrect absolute measured
value from thus being displayed.
The button on the sniffer line handle can also be activated or deactivated by pressing
the button longer.
ZERO time ZERO time is the time during which the leak rate must be negative so that the ZERO
point can be revised downward automatically. The best setting depends on your
measurement conditions (sampling speed, gas background, test specimen).
Setting range: 1 to 9.9s
Flow limits To detect a leak on the 160-sccm capillary, an upper limit value is set. If the value is
exceeded, the system issues the warning “Capillary broken.” With longer exceedance,
device components are also switched off to protect them.
To detect a clogging of the 160-sccm capillary, a lower limit value is set. If the value is
fallen short of, the system issues the “Changed flow!” warning. With a strong lower
deviation, the “Flow through capillary too low” error message is issued.
The adjustment range is 160 to 999sccm or 0 to 160sccm.
The closer the lower limit value is set to the actual flow rate, the more sensitive the
Ecotec E3000 reacts to a beginning clogging of the filter and the sniffer line.
Fig.16: Setting flow limits
The flow through the sniffer line depends on the atmospheric pressure of the
environment. If you operate the device at great height, the flow rate through the sniffer
line can drop considerably, approx. 20% per 1000m height. Reset the flow limits
accordingly in this case.
Sensitivity The sensitivity monitoring in the device ensures that the sensitivity of the Ecotec
E3000 is always sufficient. The entire gas flow from sniffer tip to sensor is monitored
and the software simultaneously checks whether the Ecotec E3000 can determine the
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