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HHF92A
Digital Anemometer
M3665/1200
A. MEASURING AIR VELOCITY (SINGLE POINT)
FEET PER MINUTE (FPM)
1.
Press the ON/OFF button and turn meter on. Meter will
full display when first powered on.
2. Unit is ready for use when LCD display shows “vel” at upper
left comer and temperature at lower right comer.
B. CONTINUOUS MOVING AVERAGE
The
meters displays continuous moving average for up to two ‘(2) hours.
1. Power unit on.
2. Place sensor in front of air flow source.
3. Press
MIN/MAX
record key and unit will begin to display moving average. The Meter will
record the reading every second.
4. Press HOLD prior to moving instrument away from air flow source to store
d
show
rz;.
dings.
MIN/MAX/AVG
c.
To obtain
MIN/MAX/AVG readings on a single point.
READING ON A
SINGLE
POINT
1. Power unit on.
2. Place sensor in front of air flow source.
3. Press
MR@lAX REC SINGLE POINT’ key. The unit will begin to record readings.
4. Press HOLD prior to moving instrument away from air flow source to store readings.
a). Press
b). Press
c). Press
d). Press
e).
MIN/MAX
MIN/MAX
MIN/MAX
MIN/MAX
.Press
MIN/MAX key again to display
5. To clear the current
MN/MAX
key until unit beeps twice, then release.
D. AIR VELOCITY AVERAGE
key once the screen displays AVG velocity readings under
key again AVG disappears.
key again to display
key again to display MAX velocity readings.
MIN/MAX
average readings, turn off the power or press and hold
FOi
MULTIPLE
MXN
velocity readings side by
currentvelocity.
POINTS
REC.
REC.
1. Power the unit on and position the vane at the first point to be measured.
2. As
;soon
as the first measurement is completed press the HOLD key until you hear a single
beep, then release. The display will show Hold above the reading.
3. Press the
MWMAX
key, When you will hear a single beep release the button. The
display
will show a digit (l-8). This number represents the point that is being recorded.
4. Repeat this process until all desired points have been measured and recorded,
Amaximum
of 8 points may be recorded at one time.
5. Once all measurements have been recorded press AVERAGE key. The unit will display the
average air velocity reading and number of points measured.
1
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E. NON SLEEP MODE
(BYPASS AUTO POWER
1, Power unit off.
QFF)
. .
2. Press ON and HOLD at the same time and then release ON only.
can
3. An “n” appears on the LCD then
VW
release the HOLD key. The instrument will remain
an until the OFF button is pressed.
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F.
CHANGING THE DEFAULT
SEITlNG/IMPERlAL
The default setting for the measuring unit of air velocity is
temperature is
steps:
1 .
Press ON and AVERAGE at
Release ON first, then average. A LCD will show
“F.
You can change the measuring units to
.
-.
thesame time.
SmalLprinting
TO METRIC
feet/n&t.
meter&c
and the unit of
and
_
“ft/m”(default) on the
of
“C
by following these
_.
i.-..
:
upper right comer and an “OF” on the lower right comer.
a). Press HOLD key to change the measuring units to metric system; press AVERAGE key
for imperial measuring units.
b). Press
MIN/MAX
REC key and an
“9
will show on the LCD. Press HOLD to confirm and
save the changed value. At this time, the baud rate “2400” (default appears on the screen
.<
t,!’
I0
‘..
4,
. ,
.
,’
tobefollowedbySteplforchangingRS232output(ifnecessaxy).
:
. .
G. AUTO POWER OFF
w ill
The
un it
turn off automatically after
;”
:‘,,
. , . .
*
20
minutes to save the battery. This will be preceded
.a
_f’.
by 3 beeps. Press the ON key and the unit will resume operation.
H. MEASURING
ft./m,
MPH, KNOTS,
:
+’
”
“
‘,”
;
‘_..J;”
,:r;,..>,*.:::
,,
“’
*’
T ’;
‘j*‘?”
<.
In imperial:
mil/h
1. Press the
knots in turn.
._.
ft./min
to SELMIL/H-KNOT Key and the reading will change from
to
.’
In metric:
2. Press the
SEL:MIL/H.KNOT
tum.
I
I.
DIRECT
MEASURlNG
Key and the reading will change from m/s to km/h to knots in
.
OF AIR
FLOW (SINGLE
POINT).CFM
’
Air Velocity measurement is calculated by multiplying the air velocity readings by the
free area dimensions. Free area is published by the grill and register manufacturer you
are servicing. You must first determine the free area of the air source before entering it
’
into the meter.
1.
Power unit on
2. Press MODE once (you will hear one beep). Meter will display “AREA” in upper case
lettering and “1.111
”
will appear.The first digit will
be flashing
.
3. Press the HOLD key to increase the number.
4.
Press the AVERAGE key to advance to next number. Follow Step 3 and repeat.
5. Press the MODE key once all digits have been entered. The word
“flow”will
appear.
The meter is now ready to measure air flow
(CFM).
To clear
memory of current multi
-
point
average readings, press and hold AVERAGE key until unit beeps twice, then release. Unit must
velocity/FPM mode in order to clear current average readings.
be in
2