Description of the Menu
55
iina
70
e 0
6
.f
m
te
chn
ica
l ha
nd
boo
k
(1
40
8)
6.2.1
Scale linear/logarithmic
•
>
>
These settings apply to the bargraph (= bar underneath the digital figures in the
measurement mode) and Y-axis in the trend mode.
The scale of the bargraph can either be linear or logarithmic. With the arrows (up and
down) it can be determined how many decades the bargraph covers.
Usually a logarithmic scale is recommended because leak rates may change easily
over several decades.
6.2.2
Display-range auto/manual
•
>
>
The upper limit of the displayed leak rate range can be set manually or automatically.
These settings apply to the bargraph (=bar underneath the digital figures in the
measurement mode and y-axis in the trend mode).
With the upper limit defined here the lower limit is set to a value based on the number
of decades (See Chapter
If linear scale is selected, the lower limit is always zero. The upper limit is only a
default value. You can change this on the measurement screen with the
Soft Key
6
and 7 if you have chosen manual display ranging.
Softkey 2:
Linear
Pressing this key switches the display to a linear scale, starting at zero.
Softkey 3:
Arrow down (Number of decades)
Pressing this key reduces the number of displayed decades. The minimum value is
2 decades. Only available if
log
(softkey 6) was chosen.
Softkey 6:
Logarithmic
The scaling will be displayed logarithmically.
Softkey 7:
Arrow up (Number of decades)
Increase the number of displayed decades. Maximum value is 9 decades. Only
available if
log
(softkey 6) was chosen.
Softkey 2:
Manual
The upper limit of the displayed range can be set manually.
Softkey 3:
Arrow down
.Decrease the upper limit if
manual
is chosen. The minimum value is 10
-11
mbar l/s.
Softkey 6:
Automatic
The limit of the displayed range will be chosen automatically.
Softkey 7:
Arrow up
Increase the upper limit if
manual
is chosen. The maximum value is 10
+3
mbar l/s.
Softkey 8:
Save the settings and return to the previous menu.
