Dräger PSS BG 4 RP, Instructions For Use Manual

Page: 65 / 78

Maintenance
65
en
4.5.3 Checking the inhalation valve
1. Tightly pinch the exhalation hose with your hand. Use the
face spanner from the test set if required.
2. Carry out pumping. The test unit must display at least
+10 mbar.
3. If +10 mbar is not reached, replace the inhalation valve or
inhalation valve disc (see chapter 4.2.3 on page 57).
4.5.4 Checking the exhalation valve
1. Set the selector switch on the test unit to .
2. Tightly pinch the inhalation hose with your hand. Use the face
spanner from the test set if required.
3. Carry out pumping. The test unit must display at least
-10 mbar.
4. If -10 mbar is not reached, replace the exhalation valve or
exhalation valve disc (see chapter 4.2.3 on page 57).
4.5.5 Checking the drain valve
1. Set the selector switch on the test unit to .
2. Pull the open side of the protective cap over the pressure
relief valve tappet and hold. Pump until the protective cap is
secured by the filled breathing bag.
3. Continue to pump until flow noises can be heard at the
drain valve. Read the value on the display.
The drain valve must open b10 mbar and +25 mbar.
4.5.6 Performing the leak test with positive pressure
1. Set the selector switch on the test unit to .
2. Reduce the pressure on the test unit using the venting switch
to approx. 7+0.5 mbar and wait until the pressure has
quietened.
3. Press the button briefly to start the timer.
The test time must amount to 1 minute. When the test time
has elapsed, the pressure difference is displayed. This is
not permitted to be greater than 1 mbar.
4.5.7 Checking the relief valve
1. Set the selector switch on the test unit to and
remove the protective cap.
2. Set the selector switch on the test unit to .
3. Pump until flow noises can be heard at the relief valve,
reading the value on the display.
The pressure relief valve must open b7 mbar and
+9 mbar.
NOTICE
The low-pressure warning generated by the
Bodyguard during this test is irrelevant here.
NOTICE
The low-pressure warning generated by the
Bodyguard during this test is irrelevant here.
35021851.eps
i
i
35221851.eps
L/min
i i
NOTICE
The low-pressure warning generated by the
Bodyguard during this test is irrelevant here.
NOTICE
The low-pressure warning generated by the
Bodyguard during this test is irrelevant here.
NOTICE
The low-pressure warning generated by the
Bodyguard during this test is irrelevant here.
35121851.eps
i i
OK
i i
i i