VOLTCRAFT VPT-100 Notice D'emploi page 31

11. meaSure fLow SPeed
"-"-Input "+"-Input
The anemometer measures flow velocities and volume flows based on the following standard conditions: 21.1 °C ambience
temperature, 1,013 mbar barometric pressure. The device has no automatic temperature compensation.
The main indication (3) of the display shows the flow velocity. It can be presented in five different measuring units: m/s, ft/min, km/h,
mph, knots.
Push "P/V/F" twice to switch to the flow mode (VEL). Push the button "Unit " several times if required to select the desired
measuring unit.
Connect the two hoses with the anemometer and the pitot tube as shown in the figure. The "+" input of the pitot tube anemometer is
connected to the overall total pressure connection of the pitot tube by the white hose. Connect the "-" input of the measuring device
to the connection for the static pressure at the pitot tube via the black hose.
Push and hold the button "Hold/Zero" for 2 seconds to perform a zero reconciliation.
For the most precise measurement possible, hold the opening of the pitot tube as precisely against the flow direction as possible –
the deviation from the flow direction should not be larger than ± 10°.
If the output measured value is negative or if you receive an error message ("Error"), check if the two hoses are correctly connected
to the anemometer and to the pitot tube.
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