Inficon Protec P3000, Translation Of The Original Operating Manual, Page: 70 / 128

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
U 3 –
2
-------------
+
=
10
0
5 35

3 –
2
---------------------
+
15oz yr

=
10
0
5 6

3 –
2
------------------ +
20g a

=
10
0
6 4 , 3 –
2
----------------
+
50g a

=
10
4 –
2 8

3 –
2
------------------
+
8 x x 10

5 –
=
10
4 –
6 55

3 –
2
---------------------
+
6 x x 10

3 –
=