KPDM-1
- 8 -
3 PRELIMINARY STARTING PROCEDURE
3.1 General provisions.
3.1.1 Liquid penetration into the PPC sensor holes is not allowed.
3.1.2 When installing (replacing) the sensor the measures should be applied to ensure the
connection hermiticity of the sensor and the PPC body frame pneumochannels.
3.1.3 Before the beginning of work perform a test switching-on of the device and make sure
that a resource of a battery has not been exhausted (a sign of the battery discharge in the lower
left corner of the display is not indicated).
3.1.4 When performing the pressure differential measurements, PPC in the gas flow should
be oriented so that the axis of its upper part coincided with the direction of air movement, with this
a central hole should be disclosed to meet the flow. If the sensor end is beyond the field of view of
the operator, it is necessary to orient on the pneumojumper location.
3.1.5 When performing measurements in high temperature flows it is necessary to make
sure that the sensor end close to the PPC body frame has not been heated upper the temperature
50-60 º
С
, in case of necessity the sensor should be cooled down.
3.1.6 When measuring temperature the pneumometric converter should be disconnected
from the display and control unit and TM should be connected. When performing measurements a
remote end of a thermal converter clad (6 mm in diameter) should not be heat upper the tempera-
ture 300 º
С
.
3.1.7 Changing sensors (PPC to PCT and vice versa) can be performed not switching-off
the device, sensor type is determined automatically.
4 WORKING SEQUENCE
4.1 Working sequence in a mode of differential pressure measurement in air flues.
4.1.1 Switch-on the device (move a toggle switch "on" in the upper position).
4.1.2 Select a measuring mode if a pneumojumper is attached on both connecting branches
the device measures dynamic pressure, if one or both connecting branches are free there is a stat-
ic pressure measurement performed.
4.1.3 Place the upper sensor end into the gas flow observing the requirements of p. 3.1.4,
push and release "I" button (click). In 1.5 seconds the digital information corresponding to the dif-
ferential pressure value in the place where the upper sensor end is located at the moment of push-
ing the button appears on a display and will be kept there until the next pushing of "I" button or un-
til switching-off the device.
The moment of measurement is accompanied by a characteristic sound
in the body frame of the primary converter.
