BG 800 300 BE / A (0105) TPG 300
28
4.7.5 »PE measurement underrange control«
group
The behavior of switching functions assigned to the cold cathode
measuring circuit (PE) can be adjusted when underrange occurs
(
→
section 4.5.2) (except in the case of self assignment).
1 2 3 4 A B
0
10
Display
Meaning
Pu 0
»UnderRng« is interpreted as valid measured
value; the switching function remains »on«
Pu 1
»UnderRng« is interpreted as an error; the
switching function changes to »off«. The switching
function does not change to »on« until the
measured value has remained within the
measurement range of the cold cathode measuring
circuit for at least 10 seconds.
Cold cathode measuring circuits for 10
-11
mbar sometimes
require more than 10 seconds for the transition
«OverRng»
ð
«UnderRng» and thus lead the switching
function being »on« for a short time.
4.7.6 »Measurement unit« group
Select the desired measurement unit:
1 2 3 4 A B
mbar
Torr
Pa
0
10
The modification is made immediately.
The threshold values for the switching functions are
adapted automatically.
