HOT WIRE
ANEMOMETER
Model : +:$204HA
TABLE OF CONTENTS
1. FEATURES................................................................ 1
2. SPECIFICATIONS......................................................2
2-1 General Specifications......................................... 2
2-2 Electrical Specifications........................................3
3. FRONT PANEL DESCRIPTION.................................... 4
3-1 Display.............................................................
3-2 Power Off/On Button.........................................4
3-3 Data Hold Button.............................................. 4
3-4 蚓/
3-5 Memory "Record" Button................................... 4
3-6 Memory "CALL" Button......................................4
3-7 Zero Button...................................................... 4
3-8 Unit Button.......................................................4
3-9 Battery Compartment/Cover.............................. 4
3-10 Probe Input Socket............................................4
3-11 Sensing Head....................................................4
3-12 Probe
3-13 Probe Plug........................................................
蚌 F / C Button...............................................4
Handle................................................... 4
4
4
4. MEASURING PROCEDURE..........................................5
5. BATTERY REPLACEMENT...........................................9
1. FEATURES
* Thermal anemometer, available for very low air velocity
measurement.
* Slim probe, ideal for grilles & diffusers.
* Combination of hot wire and standard thermistor, deliver
rapid and precise measurements even at low air velocity
value.
* Microprocessor circuit assures maximum possible
accuracy, provides special functions and features.
* Super large LCD with dual function meter's display, read
the air velocity & temp. at the same time.
* Heavy duty & compact housing case.
* Records Maximum and Minimum readings with recall.
* Data hold.
* Power supply by 1.5 V AAA (UM-4) battery x 6 PCs.
* The portable anemometer provides fast, accurate
readings, with digital readability and the convenience of
a remote probe separately.
* Multi-functions for air flow measurement : m/s, km/h,
ft/min, knots. mile/h.
* Buil
t in temperature 蚓,
* Thermistor sensor for Temp. measurement, fast response
time.
Used the durable, long-lasting components, including a
*
strong, light weight ABS-plastic housing case.
* Deluxe hard carrying case.
* Applications : Environmental testing, Air conveyors,
Flow hoods, Clean rooms, Air velocity, Air balancing,
Fans/motors/blowers, Furnace velocity, Refrigerated case,
Paint spray booths.
蚌 F/C measurement.
1
2. SPEC
IFICATION
S
2-1 General Specifications
Circuit Custom one-chip of micro-
processor LSI circuit.
Display * 0.5" (13 mm) Super large LCD
display.
* Dual function meter's
Measurement m/s (meters per second)
km/h (kilometers per hour)
ft/min (feet/per minute)
knots (nautical miles per hour)
mile/h(miles per hour)
Temp.
F/C 蚓, 蚌.
Data hold.
Sensor
Structure Tiny glass bead thermistor.
Air velocity :
Temperature :
Precision thermistor.
Memory Maximum and Minimum with recall.
Sampling Time Approx. 0.8 sec.
Operating 32 to 122F (0 to 50 C 蚓 蚓蚌 蚌).
Temperature
Operating Less than 80% RH.
Humidity
Power Supply 1.5 V AAA (UM-4) battery x 6 PCs.
(Alkaline or heavy duty type).
display.
2
Power Current Approx. DC 30 mA.
T
.
Weight 0.78 LB (355 g).
Dimension Main instrument:
7.1 x 3.1 x 1.5 inch ( 185 x 78 x 38 mm ).
Telescope Probe : Round,
0.5"(12 mm)Dia x 11"(280 mm) (min. length).
0.5"(12 mm)Dia x 37"(940 mm) (max. length).
Accessories Instruction manual......................1 PC.
Included
elescope Probe.........................
Hard carrying case.................... 1 PC.
1 PC.
2-2 Electrical Specifications (23 5 C 蚓)
A. Air velocity
Measurement Range Resolution Accuracy
m/s 0.2-20.0 m/s 0.1 m/s ( 5% + 1d )
km/h 0.7-72.0 km/h 0.1 km/h reading
ft/min 40-3940 ft/min 1 ft/min or
mile/h 0.5-44.7 mile/h 0.1 mile/h ( 1% + 1d )
knots 0.4-38.8 knots 0.1 knots full scale
Note:
m/s - meters per second km/h - kilometers per hour
ft/min - feet/per minute knots - nautical miles per hour
mile/h - miles per hour (international knot)
B. Temperature
Measuring Range 32 to 122F (0 to 50 C )蚓 蚓蚌蚌
Resolution 0.1 F 蚓/0.1 C 蚌
Accuracy 1.5 F 蚓/0.8 C 蚌
Remark :
Spec. tested under the environment RF Field Strength
less than 3 V/M & frequency less than the 30 MHz only.
3
3. FRONT PANEL DESCRIPTION
3-1 Display
3-2 Power Off/On Button
3-3 Data Hold Button
3-4 蚓/蚌
3-5 Memory "Record" Button
3-6 Memory "CALL" Button
3-7 Zero Button
3-8 Unit Button
3-9 Battery Compartment/Cover
3-10 Probe Input Socket
3-11 Sensing Head
3-12 Probe Handle
3-13 Probe Plug
F/C Button
Fig. 1
4
4. MEASURING PROCEDURE
1) Connect the " Probe's Plug " (3-13, Fig. 1) to the
" Probe Input Socket " (3-10, Fig.1).
2) Power on the meter by push the " Power On/Off Button "
(3-2, Fig.1) once a while.
3) Select the desired temperature units, using the " F/C "蚓/蚌
Button (3-4, Fig. 1).
4) Select the desired air velocity units, m/s, km/h, ft/min,
knots, mile/h, using the " Unit Button " (3-8, Fig. 1).
5) Zero setting :
a. On the " Sensing Head " (3-11, Fig. 1), slide the sensor
cover to the up position to let the air velocity sensor isolated
from the environment, refer Fig. 2.
b. Push the " Zero Button " (3-7, Fig. 1) to let
the reading value of air velocity show zero value.
" Sensor cover " slide to the up position.
Fig. 2
Probe Handle
5
6) a. Slide the sensor cover to the down position, let the air
velocity sensor to contact the air, refer Fig. 3.
b. Extent the telescope probe to the convenient length,
refer Fig. 4
air velocity sensor
( do not touch by
fingers or tools )
" Sensor cover "
slide to the low
position when
make the
measurement
Probe Handle
Fig. 3 Fig. 4
Caution !!!
Do not use the fingers or any tools to
touch the air velocity sensor, otherwise
the meter may have permanent
damage.
6
7) Direction of the sensor head :
7
There is a mark on the top of the " Sensor Head ", When
make the measurement, then this mark should against the
measured wind, refer Fig. 6, Fig. 7. When sensor head
face against the measurement air, then the upper display
will show the air velocity value. The lower display will
show the temperature value.
sensor head ( side view )
Direction mark should face
the measured wind.
Probe Handle
Fig. 6
sensor head ( top view )
Direction mark should face
the measured wind.
Fig. 7
8) Data Hold :
a. During measurement, pushing the " Data Hold
Button " (3-3, Fig. 1) will hold the display values &
the LCD will show the " D.H " symbol.
b. To cancel the Data Hold function, Press the Data
Hold Button once more.
9) Data Record ( Max. & Min. reading )
a. The Data Record function displays the maximum &
minimum readings. To start the Data Record
function, press the " Record Button " (3-5, Fig. 1)
once. " REC " symbol will appear on the LCD
display.
b. With the " REC " symbol indicated on the display
* Push the " CALL Button " (3-6, Fig. 1) once,
then the " Max " symbol with the maximum values
recorded will appear on the LCD display.
* Push the " CALL Button " once again, the " Min "
symbol with the minimum values recorded will
appear on the LCD display.
* To de-activate the Data Record function, Press
the " Record Button " (3-5, Fig. 1) once again.
All associated anunciators will disappear from the
display.
8
10) For quick measurement, follow the procedures
shown below :
Main procedures :
Power * Select the 蚓 or 蚌
On * Determine the display unit
Optional measuring procedures :
DATA HOLD MEMORY RECORD
Max., Min.
Zero
5. BATTERY REPLACEMENT
1) When the left corner of LCD display show " LBT ", it
is necessary to replace the battery. However, in-spec
measurement may still be made for several hours after
low battery indicator appears before the instrument
become inaccurate.
2) Slide the " Battery Cover " (3-9, Fig. 1) away from the
instrument and remove the battery.
3) Install the 1.5 V AAA (UM-4) battery x 6 PCs. Please
use the Alkaline or heavy duty type battery. When install
the batteries should be care for the battery polarity. After
install the batteries, then reinstate the battery
cover.
9
0309-HWA4204HA
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