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TC · Edition 08.17 33
Function
3 .2 .6 Test period t
P
for TC 4
The sensitivity of the tightness control TC can be ad-
justed 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. The longer the test period, the
smaller the leakage rate at which a safety shut-down/
fault lock-out is triggered.
The test period is set using the second jumper (on the
right in the picture).
The test period t
P
can be adjusted in intervals:
TC 410-1: 10 s to max. 60 s,
10 s = factory setting,
60 s = without jumper.
TC 410-10: 100 s to max. 600 s,
100 s = factory setting,
600 s = without jumper.
The required test period t
P
is calculated from:
Q
max.
= max. flow rate [m 3 /h]
Q
L
= leakage rate [l/h] = Q
max.
[m 3 /h] x 0.1%,
see page 35 (Leakage rate Q
L
)
p
u
= inlet pressure [mbar]
V
P
= test volume [l], see page 34 (Test volume V
P
for TC 1, TC 2, TC 3, TC 4)
Converting units, see www.adlatus.org.
t
P
[s] = 4 x
(
p
u
[mbar] x V
P
[l]
+ 1 s
)
Q
L
[l/h]
3 .2 .7 Calculation example for t
P
See Calculating test period t
P
of tightness control TC 4.