External calibration with external calibrated leak – INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector User Manual

Page 39

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6 Operation

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3 Press the right key on the sniffer handle as soon as the display shows the line

“Calibration: Press right key”.

4 Remove the sniffer tip from the reference leak if the display shows the line “Remove

sniffer from cal-opening”.

5 Confirm the new values with the key on the bottom right.

Check calibration (Test
function)

If you insert the sniffer tip in the opening of the ECO-Check during measurement
operation, an examination of the calibration is started automatically (test function). The
device checks the measured value of the ECO-Check while the sniffer probe is inside the
opening of the calibrated leak. The operator is subsequently prompted to remove the
sniffer tip from the opening of the calibrated leak.

For gases released for internal calibration, either “Test o.k.” or “Recalibration required!” will
appear. For gases not activated for internal calibration, “Gas deactivated” will be displayed.
For gases that cannot be calibrated with the ECO-Check because of very high or very low
mass positions, “Gas spec. test not possible” is shown.

Press the key “OK” or the right key on the handle to return to measurement operation.

6.4.2.2

External calibration with external calibrated leak

For external calibration of the Ecotec E3000, we recommend calibrated leaks with leak
rates > 2 g/a. If background concentrations in the testing environment are clearly
increased, a calibrated leak with a higher leak rate is required.

External calibration is a semi-automatic process. Text messages in the display guide you
through the calibration process. Calibration can be stopped at any time with the key
“Cancel”.

A warning is displayed if the device has not be switched on for 20 minutes yet. Simply
confirm the warning and then continue with calibration if you know that the device has
reached operating temperature because it was switched off only briefly before calibration.
Otherwise start calibration again later.

The gas measurement to be calibrated is generally activated. If you want to calibrate a
deactivated measurement, activate the gas in the menu “Measuring parameters”.

After measuring and a short calculation period, the results of calibration are shown in the
display. The old and the new calibration factor as well as the old and the new relative peak
position are displayed.

1 Switch to measurement view.

2 Press the key “Cal”. The list of gases currently set for measurement is displayed (up to

four gases).

3 Select the gas that the measurement is to be calibrated for.

Incorrect calibration because of operating temperature that is too low

Calibrating the device in the cold state can deliver incorrect measurement results.

The device must have been switched on for at least 60 minutes before calibration for
hydrogen measurement.

The device must have been switched on for at least 20 minutes before calibration for
the measurement of all gases.

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