BUSCH 0659230708, Instruction Manual

Page: 69 / 80

Advanced settings
7.8.7 Leak Detection: Internal Pirani gauge calibration
Procedure From the "Settings" screen, press [Advanced] [Leak Detection] [Internal Pirani
Calib.] .
Block the detector's inlet with a blanked-off flange.
Make sure:
–that the leak detector is in a hard vacuum test, in the most sensitive test mode.
–that the end of the cycle is manual (= ’operator’).
The calibration takes place in 2 stages: setting the limit pressure and setting the atmo-
spheric pressure.
Setting the
limit pressure
Start a test: press .
The "Pressure" value decreases: wait for this value to stabilise (around 5 minutes).
Make sure that the internal pressure is significantly lower than 1·10
-3
hPa.
Press the [>HV] .
Setting the atmospheric
pressure
Stop the test: press the .
Create an inlet vent: press [Inlet vent] .
Make sure that the detector is at atmospheric pressure.
The "Pressure" value increases: wait for this value to stabilise (around 5 minutes) and
press the [>Atm] .
7.8.8 Leak Detection: External gauge
Allows the leak detector to be managed by an external gauge.
Prerequisites ● Detector equipped with the 37 pin I/O board (option or accessory
(see 10)
).
Deactivate the Massive mode to use an external gauge (see 7.4.9) .
Configure the pressure source of the pump inlet (= 'external').
Possible gauges
● The gauge and the cable are the client's responsibility
Settings
Internal T (°C)
or
External T (°C) 'Internal' indicates the temperature at the detector's internal calibrated leak.
'External' indicates the temperature at the detector's external calibrated leak.
From the "Settings" screen, press [Advanced] [Leak Detection] [Analyzer Cell].
Do not switch off the filament except for carrying out manual calibration. It is not
necessary to switch the filament off in Stand-by mode to save it.
● The leak detector switches automatically from one filament to the other if the selected
filament currently being used becomes defective.
● When switched on, the leak detector uses the filament that was selected when it was
shut down.
Type of gauge detected by
the detector
Gauge model
Linear gauges Capacitives Linear CMRxxx
Piezo Linear APRxxx
Logarithmic gauges Pirani TPR/PCR TPRxxx
Capacitives Pirani TPR/PCR PCRxxx
From the "Settings" screen, press [Advanced] [Leak Detection] [External Gauge].
Gauge Select the external gauge model.
Ext. Pressure
(mbar)
Indicates the pressure measured by the external gauge.
Inlet Press. source Set the inlet pressure displayed on the "Standard" screen: ’internal’ (leak de-
tector's internal gauge) or ’external’ (external gauge on the customer's installa-
tion)
Full scale (mbar) Only for a linear gauge
Set the operating range for the gauge: value indicated on the gauge.
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