TC · Edition 07.14
31
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3 .6 Test period t
P
The sensitivity of the tightness control TC can be adjusted
by adapting the test period t
P
for each individual system.
The longer the test period t
P
, the greater the sensitivity of
the TC. It is set using the second jumper on the unit,
see page 26
3 .6 .1 Leakage rate V
L
It is possible to check a specific leakage rate V
L
using the
TC. Within the scope of the European Union, the maximum
leak- age rate V
L
is 0.1% of the maximum flow rate Q
max.
[m
3
/h (n)].
Q
max.
[m
3
/h (n)] x 1000
Leakage rate V
L
[l/h]
=
1000
The required test period t
P
is calculated
from: Inlet pressure p
u
[mbar]
Leakage rate V
L
[l/h]
Test volume V
P
[ l ]
If a small leakage rate V
L
is to be detected, a long test
period t
P
must be set.
See page 43 (Converting units)
t
P
[s] = 4 x
(
p
u
[mbar] x V
P
[ l ]
V
L
[l/h]
+ 1 s
)
Type
Test period t
P
TC 1, TC 2, TC 3
10 to 60 s
TC 410-1
10 to 60 s
TC 410-10
100 to 600 s
