Inficon Protec P3000

70 Equipment Settings
Converting an output voltage to a leak rate
If the recorder outputs a certain voltage and you want to convert this to a leak rate,
the following formula applies:
(2 is used since one decade is spread over 2 Volts. 3 is used because the trigger
level will always be within the range of 3 to 5 V).
Example calculations:
Trigger
TE
(Trigger
exponent)
U (Output
voltage)
LR (Leak rate)
2.83 oz/yr 0 5.35V
3 g/a 0 5.60V
6.4V
5 x 10
-4
mbar l/s
-4 2.8V
mbar l/s
6.556V
mbar l/s
LR 10
TE
U3–
2
-------------
+
=
10
0
535 3–
2
---------------------
+
15oz yr=
10
0
56 3–
2
------------------
+
20g a=
10
0
64,3–
2
----------------
+
50g a=
10
4–
28 3–
2
------------------
+
8xx10
5–
=
10
4–
655 3–
2
---------------------
+
6xx10
3–
=