4
MEASUREMENT
POWER ON/OFF
Press to turn on the meter. The
screen shows full display with blue
backlight on and enter normal mode.
(Model 89161/89171).
For model 89191,it proceeds 30
seconds warm up after turned on the
meter, then it enter normal mode.
Press again in any mode to turn
off the meter.
The meter is preset auto sleep in 20
minutes of inactivity. To disable this
function, hold down and for 2
seconds to turn on the meter while it is
off. It shows “n” on the LCD (see Fig.A)
and goes into normal mode(or 30 sec.
warm up for model 89191) and won’t
turn off itself until is pressed or out
of voltage.
Fig.A
SWITCH DISPLAY
When the meter is turned on, it shows
the current readings of
air velocity
on
the upper display and
air temp.
on the
lower(see Fig.B). To switch display of
other measurements, press or .
Fig.B
m/s
O
O
C
