Advanced settings
7.4.6 Memo function
At the test stop, this function freezes the "Standard" screen with the leak rate measured
during this test: the latest leak rate measured during the test displays and flashes.
7.4.7 Zero activation
Fig. 2
4
:"Memo function" screen using a function key
This function is used to help the operator identify very small leak rate variations in the
surrounding background or to dilate small measured leak rate fluctuations on the analo
-
gical display.
To activate the function manually, press the
[Zero]
.
● Press once: activate/deactivate zero by quickly pressing the
[Zero]
function key.
● Press > 3 s:
– activation: quickly press the
[Zero]
function key. Each time the key is pressed
quickly, a new zero is carried out.
– deactivation: press > 3 s the
[Zero]
function key.
By connecting an inlet vent (or nitrogen) line to the inlet vent, the detector's tracer
gas pollution is reduced.
From the "Settings" screen, press [Test] [Memo Function].
Active
Activate the function.
Display time
Setting required if the function is active.
Activate the display time delay.
• On = the value of the measured leak rate flashes for the set duration.
• Off = the value of the measured leak rate will flash until a new test begins.
Set the display duration.
For quick access from the control panel, set a function key for [Memo]
From the "Settings" screen, press [Test] [Zero Activation].
Activation
Activate the function (activated if ’automatic’ is set).
Zero Exit
Setting required if ’operator’ is set.
Set the type of keystroke for exiting the function (see below).
Trigger
Setting required if ’automatic’ is set.
Set the function trigger factor.
Value
Setting required if ’automatic’ is set.
Set the function trigger value.
To launch the function manually from the control panel, set a function key to
[Zero]
.
Using this function is recommended when the background of the tracer gas is
stable and significant.This function is used to measure a leak rate that is lower :
- 2 decades in hard vacuum test mode 5·10
-13
Pa·m
3
/s (5·10
-12
mbar·l/s) maximum
- 3 decades in sniffing mode (5·10
-10
Pa·m
3
/s (5·10
-9
mbar·l/s) maximum
than the detector’s background when the detector is no longer in roughing.
To deactivate the Zéro [Zero] function key, set the activation to 'None'.
53
0870231897_0001_IM_en
Summary of Contents for 0659230708
Page 79: ...Note 79 0870231897_0001_IM_en...
