Agilent Technologies G8610A Operation Manual page 107

Agilent Technologies Helium Leak Detector
Range
NOTE
Table 6-1 Range Stop/Sensitivity Requirements
Range Stop
OFF
-11
-10
Configures Minimum Range (Range Stop) and Only Show Range
(Manual) Leak Rate options
❑
Only Show Range - Configures the leak detector so that it
only displays the pre-selected decade entered in the manual
range variable field. For example, if the manual range
feature was enabled and the manual range variable was set
to E-6, then the leak rate decade displayed on the LED bar
graph during testing would be the E-6 atm cc/sec range only.
This feature is useful when the concern is only with
monitoring the leak rate measurement within a single
decade. 
For example, if the Only Show Range feature was enabled
and the Only Show Range variable was set to 10
the leak rate decade displayed on the LED bar graph during
testing would be the 10
❑
Minimum Range - Configures the leak detector so that it
only auto-ranges down to the pre-selected decade. To allow
auto-ranging to the maximum sensitivity of the system, turn
Maximum Range Off.
This feature is useful when a product specification is more
than one decade less stringent than the actual sensitivity of
the leak detector. If the leak detector is capable of displaying
full scale < E-11 atm cc/sec, but the test specification is only
in the E-7 atm cc/sec range, then setting the range stop to
E-8 atm cc/sec would reduce the test cycle time by
eliminating the need for the leak detector to reach its most
sensitive scale during each test cycle.
Activating the Minimum Range extends the sensitivity
requirements for calibration, thus eliminating unnecessary
calibration errors (see Table 2-4).
Activating the range stop extends the sensitivity requirements
for calibration, thus eliminating unnecessary calibration errors
(Table 6-1).
Max Gain
6.9
ON at
6.9
10
06
atm cc/sec range only.
MDL
5.00E-12
5.00E-12
5.00E-11
06,
then
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