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HD31
- 33 -
V1.6
air flow to be measured, keeping the arrow on top of the probe parallel to the flow, as indi-
cated in the figures below. The probe must be kept orthogonal to the flow and not inclined.
OK
NO
Fig. 4.5.4: positioning hot wire probes
Probe power supply:
To reduce battery drain, the hot-wire probe is not powered at instrument startup:
OFF
appears
in place of air speed and flow measurements. To power the probe:
1.
Press
SELECT
to display the
HOTW
command in the command bar, then select the com-
mand by pressing
F1
.
Fig. 4.5.5: HOTW command
2.
OFF indication on the display is replaced by the measurement.
Select again the HOTW command to switch off the probe.
Flow direction indicator
Probe top
Содержание HD31
Страница 6: ...HD31 6 V1 6 2 DESCRIPTION Fig 2 1 instrument description...
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