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Setting measurement time t
▷ The measurement time t
jumper in increments of 5 s to max. 30 s.
▷ t
is set to 30 s at the factory.
M
▷ No jumper: no function. The
nently red, see page 8 (Assistance in the
event of malfunction).
▷ The longer the measurement time t
the sensitivity of the tightness control. The longer
the measurement time, the smaller the leakage
rate at which a safety shut-down/fault lock-out
is triggered.
▷ For all CG versions, the measurement
time t
must be set to 5 s on TC 1C.
M
▷ If no leakage rate is specified, we recommend
the max. measurement time is set.
▷ Within the scope of the European Union, the
maximum leakage rate Q
mum flow rate Q
max.
▷ If a leakage rate is specified, find the measure-
ment time t
from the following:
M
Q
= max. flow rate [m
max.
Q
= Q
[m
3
/h] x 0.1% = leakage rate [ l/h]
L
max.
p
= inlet pressure [mbar]
u
V
= test volume [ l ], see page 7 (Values for
P
valve and pipe volume)
▷ The tightness control TC requires a minimum
start rate in order to carry out tightness tests
on slow opening valves:
up to 5 l (1.3 gal) test volume V
mum flow rate Q
max.
volume V
= 10% of maximum flow rate Q
P
Determine measurement time t
▷ Measurement times t
2.5 x p
[mbar] x V
u
t
[s] =
M
Q
L
▷ The entire test period is made up of the meas-
urement times t
of both valves and the fixed
M
opening time t
of both valves together:
L
t
[s] = 2 x t
+ 2 x t
P
L
M
can be set with a
M
t
M
30s
25s
20s
15s
10s
5s
Power
LED is perma-
1
2
, the greater
M
is 0.1% of the maxi-
L
[m
3
/h (n)].
3
/h]
= 5% of maxi-
P
, up to 12 l (3.12 gal) test
max.
.
M
for V1 and V2:
M
[ l ]
P
[ l /h]
M
Values for valve and pipe volume
V1
Valves
VG 10
VG 15
VG 20
VG 25
VG 40/VK 40
VG 50/VK 50
VG 65/VK 65
VG 80/VK 80
VG 100/VK 100
VK 125
VK 150
VK 200
VK 250
VAS 1
VAS 2
VAS 3
VAS 6
VAS 7
VAS 8
VAS 9
VCS 1
VCS 2
VCS 3
VCS 6
VCS 7
VCS 8
VCS 9
Calculation example:
Q
= 100 m
max.
p
= 100 mbar
u
V
= V
+ L x V
P
V
Q
= 100 m
3
L
.
2.5 x 100 x 7 = 17.5 s
100
Set the next highest value (in this example 20 s)
with the jumper.
Disconnect the unit from the electrical power
supply.
Unscrew the housing cover.
D-49018 Osnabrück, Germany
4 Set the jumper to the position for the required
TC
measurement time.
5 Position the housing cover and screw tight.
6 Mark the set measurement time t
label with a waterproof pen.
▷ The entire test period for this example is as fol-
lows: 2 x 3 s + 2 x 20 s = 46 s.
GB-7
V
P
V2
V
= V
+ L
L
P
V
Valve
Nomi-
volume
nal size
volume V
V
[ l ]
DN
V
0.01
10
0.07
15
0.12
20
0.2
25
0.7
40
1.2
50
2
65
4
80
8.3
100
13.6
125
20
150
42
200
66
250
0.08
0.32
0.68
1.37
2.04
3.34
5.41
0.05
0.18
0.39
1.11
1.40
2.82
4.34
3
/h
= 7 l
R
/h x 0.1% = 100 l/h
on the type
M
t
(s) 5 10 15 20 25 30
M
V
x
R
Pipe
R
[ l/m]
0.1
0.2
0.3
0.5
1.3
2
3.3
5
7.9
12.3
17.7
31.4
49
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