User guide

Equipment Settings 4-24
kina26e Chapter 4.fm Technical Handbook(1209)
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
Trigger
exponent
Output
voltage
Leak rate
0.1 oz/yr -1 5.35V
3 g/a 0 5.60V
6.4V
5 x 10
-4
mbar l/s
-4 2.8V
6.556V
leak rate⋅ 10
Trigger onentexp⋅
U3–
2
-------------+
=
10
1–
535, 3–
2
-------------------- -+
1 5oz, yr⁄=
10
0–
56, 3–
2
----------------- -+
20g a⁄=
10
0–
64,3–
2
----------------+
50g a⁄=
10
4–
28, 3–
2
----------------- -+
810⋅
5–
mbarl s⋅=
10
4–
655, 3–
2
-------------------- -+
15mbarl s⋅,=