MIETHKE M.blue Mode D'emploi page 22

GB | INSTRUCTIONS FOR USE
Fig. 9: Localising the valve using the
M.blue plus Compass
The direction markings on the template show
the flow direction.
2. Test procedure
In order to determine the selected pressure
level, the compass is then closed again. The
float gauge should now be centred by mov-
ing the instrument in the designated circular
marking (fig. 10). Once the float gauge is cen-
tred, the currently set opening pressure of the
gravitational unit can be read off via the line
mark on the float gauge (fig. 10).
Fig. 10: Determination of the pressure level with the
M.blue plus Compass
There are two scales on the scale ring. The
opening pressure of the M.blue gravitational
unit is set to the blue marked adjustment
range of 0 to 40 cmH
20
O of the inner scale.
2
Fig. 11: 1. M.blue scale
Inside: M.blue scale of 0 to 40 cmH 2 O (opening pres-
sure of the gravitational unit in the picture example is
16 cmH 2 O)
CAUTION
The M.blue plus Compass should be placed
centrally over the valve, if possible; otherwise
incorrect determination of the opening pres-
sure may occur.
M.blue plus Compass reacts sensitively to
external magnetic fields. In order to rule out
unwanted interactions, the M.blue plus Adjust-
ment Ring should not be in the immediate
vicinity of the M.blue plus Compass when the
opening pressure is being determined. We
recommend a minimum distance of 30 cm.
NOTE
Possible air bubbles inside the Compass do
not affect its functionality.
3. Adjustment process
In order to adjust the opening pressure, 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. 12).