Dungs VPS 504 User Manual

4 … 12
Idle state: Valves 1 and 2 are closed.
Pressure build-up: The internal mo-
tor pump increases the gas pressure
in the test section by approx. 20 mbar
compared to the input-side pressure
applied to valve V1.
During the test period, the installed
dierential pressure switch monitors
the test section for leakage. If the test
pressure is attained, the motor pump
isswitchedo(endoftestperiod).The
release time (10-26 s) depends on the
test volume (max. 4.0 l) and input pres-
sure (max. 500 mbar). If the test section
is tight, the contact is released to the
automatic burner control after max. 26
s - the yellow signal lamp lights up.
If the test section is leaky or if the pres-
sure increase by + 20 mbar is not attained
during the test period (max. 26 s), the
VPS 504 switches to fault. The red signal
lamp lights as long as the contact release
by the regulator or thermostat is present
(heat requirement).
If there is a short power failure during
the test or burner operation, the test
is started again automatically.
If the pumping time < approx. 10s,
thepressuredierencebetweenthe
testing system and the inlet pressure is
balancedafterpumpingisnished.
Operation: The internal valve of the
VPS 504 is closed.
Program sequence
Functional description
The VPS 504 operates depending on
pressure build-up.
The program module starts to function
when heat is requested.
Test is performed depending on the
burner functional procedure:
Check prior to burner start or
Check during pre-purge period or
Check after burner shut-down
Function principle
}
t
F
> 10 s
}
t
F
≈10s
Release period t
F
Period which a VPS requires to per-
form a complete operation procedure.
The release period of the VPS 504
depends on test volume and input
pressure:
V
Test
< 1.5 l
p
e
> 20 – 500 mbar
V
Test
> 1.5 l
p
e
> 20 mbar
t
F
max. ≈ 26 s
Test period t
test
Pumping time of motor pump.
Test volume V
test
Volume between V1 output-side and
V2 input-side and the intermediate
tube pieces.
V
Test max. /VPS 504
= 4 l
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p
e
p
2
p a
p
1
p
e
DMV-D(LE)
A
A
Program
module
Instrument gland
Connection
Test volume
V [l]
Test
1234
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
p =
300 mbar
e
p
= 100 mbar
e
p = 20 mbar
e
p = 500 mbar
e
Release period
⊕ 10 s
at test volume
† 1,5 l
Field of application
Release period
t [s]
F
p + 20 mbar
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
pa
p
1
pe
p
2
p
a
p
1
pe
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p
e
p
2
p
a
p
1
p
e
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
pe
p
2
p
a
p1
p
e
Program modul
p
e
p
e
p
e
p + 20 mbar
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p a
p
1
p e
p
2
p
a
p
1
p e
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p
e
p
2
p
a
p
1
p
e
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p e
p
2
p
a
p 1
p
e
Program modul
p
e
p
e
p
e
p + 20 mbar
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p a
p
1
p e
p
2
p
a
p
1
p e
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p
e
p
2
p
a
p
1
p
e
Program
modul
p
e
V1
p = 500 mbar
max.
V2
VPS 504
p
2
p
a
p
1
p e
p
2
p
a
p 1
p
e
Program modul
p
e
p
e
p
e
Operation
Idle state
Pressure
build-up

Dungs VPS 504 Specifications

General

Brand	Dungs
Model	VPS 504
Category	Test Equipment
Language	English