User Manual LabModul 240
Page 8
www.labtec.de
A 2
testing demand valves
2
Demand valve
2.1
Leakage: Pressure rise after #
min at
--
#
mbar negative pressure / overpressure
2.2
Tightness of the dosing valve: Pressure change with pending medium pressure to # min. at # mbar
2.3
Opening pressure / activating pressure on # l/min exhausting
2.4
Static pressure / overpressure of demand valves
Test
step
Operation
Comments
Controls
2.1.1
Couple demand valve to test head
Use mark specific adaptors.
2.1.2
Seal the medium
-
pressure hose of the regulator
with a cap or connect it to the medium pressure
connection (E) on the device.
E
2.1.3
Test vacuum with pushbutton (6) to setpoint
-
Set # mbar. Turn on the stopwatch
.
If necessary, relieve with button (7)
and approach to setpoint.
and/or
Test overpressure with push button (5) to set-
point. Set + # mbar. Turn on the stopwatch.
If necessary, relieve with button (7)
and approach to setpoint.
2.1.4
Read off the pressure change on the LCD dis-
play (LP) after a specified time # min and com-
pare with the setpoint.
All further tests require high pressure!
Regulator in conjunction with a
Connect the SCBA to the test device.
Medium pressure hose from the PA
regulator of a SCBA must with
Device connection (D) to be connec-
ted.
D
2.2.1
Open the bottle of the SCBA .
Medium pressure flows into the device
2.2.2
Close the bottle of the SCBA .
Tester / DUT are under pressure .
2.2.3
Relieve low pressure with button (7) and set to
setpoint.
Regulator must be closed, close if ne-
cessary.
2.2.4
Read off the pressure change on the LCD dis-
play (LP) after a specified time # min and com-
pare with the setpoint.
2.3.1
Open the bottle of the SCBA .
Medium pressure flows into the device
and is in the device.
2.3.2
Switch on pump with switch (9) and flow of
-
10 l /
min. produce.
until the regulator opens
.
2.3.3
Read the opening / closing pressure of the regu-
lator on the LCD display (LP).
2.3.4
Switch off pump with switch (9).
2.4.1
With the bottle open, read the static overpres-
sure of the open LA on the LCD display (LP) and
compare with the setpoint.
Testing only for positive pressure regu-
lators
2.4.2
Close the bottle and relieve the medium pres-
sure with the button (12).
at the end of the test or continue with
further tests.
