© PCE Instruments
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5.1.3
Air flow measurement
The device can also measure air flow. When doing so, the device uses standard conditions
(21.1 °C; 1013 mbar).
To measure air flow, follow these steps:
1.
Connect the Pitot tube to the device as described in chapter 5.1.2.
2.
Press “
P/V/F
” until “Duct Shape” appears on the bottom left side of the display. Now
you can see the duct shape and the duct dimensions on the display.
If you set a circular duct shape the display shows a
●
symbol on the bottom left side.
The primary display also shows the diameter in cm or inch.
If you set a rectangular duct shape the display shows a
■
symbol on the bottom left
side. The primary display shows the width of the duct in cm or inch (“W=”). Press
“
P/V/F
” to view the height of the duct (“H=”). If you want to change the duct shape and
dimensions see chapter 5.3.2 for more information.
3.
Press “
P/V/F
” again to get to the air flow mode (“FLOW”). In air flow mode, press
“
Unit
▼
” to change the measuring unit. You can switch between CMM and CFM.
4.
Place the Pitot tube in the duct and align the tip as described in chapter 5.1.2.
The primary display now shows the air flow.
5.2
Further functions
5.2.1
Tem perature measurement
The ambient temperature is shown on the secondary display. You can switch between °C and
°F by pressing “
Unit
▲
”.
5.2.2
Hold function
Press the “
Hold/Zero
” key to freeze the current reading on the display. A “HOLD” indication
appears.
To unfreeze the display, press “
Hold/Zero
” again.
5.2.3
MIN, MAX, AVG function
Press the “
MIN/MAX
” key to switch between maximum (MAX), minimum (MIN) and average
(AVG) function. The secondary display shows the time since the activation of the function.
Press “
P/V/F
” to see the MAX/MIN/AVG value of the pressure, velocity, air flow or temperature.
Press and hold the “
MIN/MAX
” key for 2 seconds, to exit this function.
5.2.4
Save readings
The flow meter has an internal memory which can hold up to 99 readings for each measuring
parameter (pressure, velocity and air flow).
To save a reading, press the “
Save/Clear
” key.
Attention:
When the memory is full, new readings cannot be saved anymore. If you try
to save a new reading, the display shows a “FU” (full) indication and the
device gives out a beeping noise. You have to delete some of the stored
data in order to save new readings.
En
g
lis
h
