HTA105
EN - 10
5.3. CALCULATING AVERAGE VALUES OF QUANTITIES
5.3.1. Average value calculated by spots
CAUTION
Do not touch not expose the internal sensors found on the top side of the
telescopic probe to mechanical shocks, in order to prevent damaging them.
1. Insert the external probe on the top side by means of the relevant terminal (see Fig. 1
–
part 1). Pay attention to the arrow found on the connector of the probe (see Fig. 7),
which must be directed towards the front side of the instrument
2. Switch on the instrument using key
ON/OFF
.
3. Press key
UNIT
to set air speed measuring unit (see § 4.3.5).
4. Press key
FLOW/TEMP
to select average values of measurements of volumetric flow
rate, air temperature or humidity to be carried out with the same procedure as for air
speed.
5. Press key
MEAN
. Symbols
“
”
and
“
Mean
”
are shown in the bottom part of the display,
while the number of the measuring spots are show on the main display.
6. Carry out the first measurement of air speed as described in § 5.1 and press key
ENT
.
The value of the first spot is shown on the secondary display (see Fig. 8
–
left part).
Fig. 8: Calculation of the average value of speed by spots
7. Carry out the second measurement of air speed as described in § 5.1 and press key
ENT
. The value of the second spot is shown on the secondary display (see Fig. 8
–
middle)
8. Carry out other possible air speed measurements following the same procedures and,
at the end, press key
MEAN
. Symbols
“
”
and
“
Mean
”
flash on the display and the value
of the arithmetic mean is shown on the secondary display (see Fig. 8
–
right side).
9. Press key
MEAN
again to go back to the normal measuring screen.
