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5.3.2. Average value calculated over time
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 and hold (>2s) key MEAN. Symbols
respectively in the bottom part of the display and on the secondary display, while
symbols
"
0000
"
main display (see Fig. 9
6. Press key ENT to activate the measuring time (range: 1s ÷ 59min, 59sec) indicated on
the main display, while air speed measurement is running (see Fig. 9
to a measuring time of 2min e 53s)
7. Press key ENT key again to stop and/or extend measuring time
8. Press key MEAN to stop measurement. Symbols
and the Average value calculated over time with sample rate of 1s is shown on the
secondary display (see Fig. 9
9. For measuring time over 20 minutes (see Fig. 9
the Auto Power OFF feature (see § 4.4)
and
"
mm/ss
"
(timer expressed in minutes/seconds) are shown on the
–
left part).
Fig. 9: Average value of speed calculated over time
–
right side)
CAUTION
"
"
Mean
and
"
Mean
–
right side) is necessary to disable
EN - 11
"
"
and air speed are shown
–
middle, referred
"
and
"
"
flash on the display
HTA105
–
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