MIETHKE M.blue plus Instruments Mode D'emploi page 16

GB | INSTRUCTIONS FOR USE
WARNING
The M.blue plus Compass should
be placed centrally over the
valve, if possible; otherwise
incorrect determination of the
opening pressure may occur.
M.blue plus Compass reacts sensitively
to external magnetic fields. In order
to rule out unwanted interactions, the
M.blue plus Adjustment Ring should not
be in the immediate vicinity of the M.blue
plus Compass when determining the
opening pressure. We recommend a
minimum distance of 30 cm.
NOTE
Possible air bubbles inside the
compass do not affect its func-
tionality.
3. Adjustment process
In order to adjust the opening pres-
sure, the compass is opened, but without
changing the position of the scale ring.
The adjustment ring is now inserted into
the scale ring in such a manner that the
line marking points to the desired value
on the scale of the scale ring (Fig. 9).
Figure 9: Inserting the adjustment ring
The grey adjustment range from 0 to 20
cmH 2 O on the outer scale applies for the
opening pressure of the differential pres-
sure unit of the proGAV2.0. The opening
pressure of the M.blue gravitational unit
14
M.blue plus Instruments
uses the adjustment range from 0 to 40
cmH 2 O of the blue inner scale.
Figure 10: Setting the differential pres-
sure unit of proGAV 2.0 in the example
illustrated to 1 cmH 2 0 or adjusting the
gravitational unit of M.blue in the exam-
ple illustrated to 32 cmH 2 0.
By applying slight pressure with the
index finger to the valve diaphragm
located in the centre of the adjustment
ring and under the skin, the rotor brake
is released and the opening pressure
of the differential or gravitational unit is
changed to the desired value (Fig. 11).
Figure 11: Adjustment using the M.blue
plus Adjustment Ring
Both the differential pressure unit of
proGAV 2.0 and the gravitational unit
of M.blue are equipped with a feed-
back mechanism. If targeted pressure
is exerted on the valve, an acoustic
signal (a clicking sound) is audible, or
a resistance can be felt, as soon as
the rotor brake has been released due
to the valve housing design. In other
words the valve shows both acousti-
cally and haptically when the pressure