5
"
rdY
" indicating it is ready to take a
measurement.
The RVA+ powers up to the unit of measure
used last.
English/Metric Unit Selection
To select between English and metric units, be
sure that the display indicates "
rdY
". Press and
hold the
▼
key for approximately five seconds.
The display will show
"
EnG
"
or
"
NNEt
".
Release the
▼
key. Use either the
▲
or
▼
key
to make your selection. Press MODE/CLEAR
key to accept the selection and return to
"
rdY
".
Measuring Air Velocity
With the RVA+ displaying
"
rdY
"
, select
velocity units using the
▲
or
▼
arrow keys. In
order to take a velocity reading, hold the
rotating vane in the airstream noting the flow
direction arrow on the instrument head. Keep
the vane in the airstream about five seconds
before pressing READ key to take a reading.
This enables the vane anemometer to reach
steady speed and the average reading will be
more accurate.