Advanced settings
If there is no internal calibrated leak, calibration can be performed with an external cali-
brated leak. By default, autocalibration is set to ’On’ and the internal leak is selected so
that the detector can be calibrated quickly.
Calibration = 'operator
'
Calibration started by the operator.
Press the
[AUTOCAL]
.
If calibration does not start within 20 minutes after the leak detector is switched on, mes-
sage is displayed.
Fig. 4
0
:Leak detector ready for calibration
Calibration = 'start-up
'
Calibration starts automatically when the leak detector is switched on.
Calibration = 'manual
'
Calibration starts manually.
"Calibration control" set-
ting
Operation reserved for service centres and experts only.
The leak detector can also be calibrated using an external leak
(see
6.5
).
Calibration control saves the operator time because the calibration control is quicker than
the full calibration.
If calibration = 'operator' or 'start-up', the calibration control function performs a control
of the calibration according to the parameters set.
The calibration control is deactivated if calibration = 'manual'.
The calibration control is performed with the leak detector's internal calibrated leak (leak
type parameter = 'internal').
The leak detector compares the measured leak rate of the internal calibrated leak with
the set leak rate of the internal calibrated leak:
● If the ratio is within the limits allowed, the leak detector is properly calibrated.
● If the ratio is outside those limits, a message appears suggesting that a full calibration
of the leak detector be started.
7.8.6
Leak
D
etection: Analyzer cell
From the "Settings" screen, press [Advanced] [Leak Detection] [Calibration].
Calibration
Select the type of calibration. See details below.
Calib.Checking
Activate the calibration checking and set the frequency. See details below.
Checking
Select the type of calibration (activated if ’automatic’ has been set).
Frequency
Set the set points (cycles and times) for triggering the calibration control.
The first set point reached will trigger the control.
To launch the function from the control panel, set a function key to [Check Cal].
At any time, the operator can start a leak detector calibration control: detector in
Stand-by mode, press the [AUTOCAL] function key twice within 5 seconds.
From the "Settings" screen, press [Advanced] [Leak Detection] [Analyzer Cell].
Fil. Selected
Indicates the filament used for the measurement (2 filaments in the analyzer cell).
Filament
Indicates if the filament used is ’on’ or ’off’ when the detector is switched on.
– Triode pressure
– Elec.Zero
– Target value
– Acc. voltage (V)
– Emission (mA)
– Coeff. Sens.
Parameters for manual calibration.
This type of calibration is reserved for service centres and leak detection
experts only
.
Calib. valve
Define the actual status of the calibration valve.
Used to open/close manually the calibration valve, for example.
Remember to close the valve again after use.
Manual calibration is only for ex-
perts.
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