Specials; Flow Volume; Density; Pressure - TESTO 454 Instruction Manual

Specials

‚F-no.
Flow vol.

Density

Ein
Enter /
On
Specials Specials
td øn td øff
m3/h on m3/h on
m/s on m/s on
Ein
Enter /
On
Specials
td on
m3/h øn
m/s on
Ein
Enter /
On
Specials
td on
m3/h on
m/s øn
Ein
Enter /
On
Restart
to
activate
Enter / Ein
On
Specials
SF display
ƒlow vol.
Density
Ein
Enter /
On
Flow vol. Flow vol.
round round
10.0 mm ˛0.0 mm
Ein
Enter /
On
Ein
Enter /
On
Flow vol. Flow vol.
square round
.....
10.0 mm 12.5 ˛m
Enter / Ein
On
10.0 mm
Flow vol.
(Select from
Area
"mm", "cm", "m")
.....
10.0 mm2
Ein
Enter /
On
10.0 %
Ein
Enter /
On
Specials Density
SF display
Flow vol. 1123 g/m3
Ein Ein
Enter / Enter /
On On
∂ensity
Specials
Abs. pressure
Flow vol.
Density
1013 hPa
Ein Ein
Enter / Enter /
On On
πressure
8
8.8.1 Special functions display
Special functions, calculated from the measured val-
ues of the connected probes, are displayed in the
measuring menu if they are activated in the
"S ." menu.
PECIALS
td = Dew point (Combination probes %RH - °C)
m 3 /h = Volume flow (Velocity probe)
The accuracy of the volume flow display
follows from the accuracy of the velocity
measurement. Multiply the maximum and
minimum possible velocity value in the
accuracy data by the cross-section to get the
permissible deviation of the volume flow
measurement.
m/s = Air velocity (pressure probe)
The Pitot tube differential pressure is
converted to air velocity. Here the air density
is entered as a parameter (see Appendix
"Probe description").
Switching on or off is carried out via <up><down>
and your entry is confirmed via <Enter>.
The special functions selected are activated by a
restart. The settings remain even after the measuring
instrument is switched off.

8.8.2 Flow volume

Enter the dimensions of the air channel (round,
square, cross-section area). The measuring instru-
ment calculates the flow volume set in
"SF "(see above).
DISPLAY
8.8.3 Density
The density is required for the conversion of the
dynamic pressure into velocity. Please find the corre-
sponding value in the enclosure Measuring engi-
neering.

8.8.4 Pressure

The air pressure is required for the compensation of
the CO probe and the pressure probe (Pitot tube).
2
Refer to the more detailed description in the enclo-
sure Measuring engineering.
Main menu
8.8 Specials
31