User Guide PFM 1000
8 | VU.E2.G1.02 © Danfoss | 2019.02
Pressure Measuring Zero, Deaeration of Measuring Hoses
For measuring low differential pressures (under 500 Pa), it is necessary to reset the pressure measuring
of the measuring unit.
The reset function will be activated from the Sensor zero setting selection list. You will be led
through the reset procedure by gradually emerging pictures. By rotating the pressure reset knob to
the left, the pressure inlets are hydraulically connected and physically there is zero pressure difference
between them. In the pressure measuring unit, the zero pressure value is set. Then, turn the reset
button to its default position.
The connection of the pressure inlets can also be used to bleed the connection hoses of the
measuring unit. For media temperatures above
50 ° C, venting of less than 10 seconds is recommended to avoid unnecessary heating of the pressure
unit measuring circuits.
Measuring (continuous)
Quick Record
Selecting the Quick Record button navigates to a new window where additional details of the
recording such as the name or value of the required flow through can be added in the relevant fields.
The initial pressure value on the measured valve prior to recording can also be added. The last field in
the Quick Recording window can be populated with the name of the folder where the recording will
be saved, if left empty the record will be saved in a default location.
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