Initialising Differential Pressure Probe (Testo 445); Activating M/S In Differential Pressure Probes (Testo 445); Activates Volume Flow And Sets Duct Cross-Sections For Velocity And Differential Pressure Probes (Testo 445) - TESTO 445 Instruction Manual

M.05 N.0017
MAN
1 1 : :
mbar
22. 7 3
m/s
2: td°C
h h p p a a =0
m/s
m/s
ON OFF
m3/h
ON
...
/
= scroll
value
100. cm
=
Next
position
Once the cross-section is entered, return to the current volume flow measurement.
Initializing pressure probe / Activating velocity and volume flow
i
The setting functions are activated in accordance with
reading line selected - flashing cursor in display.
Differential pressure probe (testo 445 only):
Activating/deactivating m/s, m
initialisation
Velocity probes (testo 445 only):
Activating/deactivating m
Switch velocity speed (m/s) in the display on and off.
The respective flashing setting is confirmed with
Switch volume flow (m3/h) in the display on and off.
OFF flashes 
OFF
ON blinkt 
Ø AxB
100. cm
A
100, cm
B
Zero adjustment of differential pressure probe (hPa) and
return to current measurement.
 Switch ON/OFF
 Switch to ON/OFF
return to measurement.
Input of duct cross-section:
m 2
0.500 m 2
17
4. Parameter settings
3 /h, in addition to mbar;
3 /h, in addition to m/s
FUNNEL
Ø = round duct cross-section;
enter diameter.
AxB = rectangular duct;
enter side lengths A and B.
= known cross-section
m 2
20
area in m 2 ; enter cross-
section area.
FUNNEL = Funnel factor in
volume flow funnel used
(See Instruction manual on
volume flow funnel).
.
...
Ø