Model 473B 100 mm Vane Thermo-Anemometer Test Instrument
Specifications - Installation and Operating Instructions
Bulletin TE-473B
The
MODEL 473B
100 mm Vane Thermo-Anemometer Test Instrument is a versatile
unit that quickly and easily measures air velocity or volumetric air flow, as well as air
temperature and humidity in imperial or metric units. A stainless steel 100 mm vane
probe is included, which has a comfortable hand grip. The extruded aluminum housing
fully protects electronics, yet is lightweight and comfortable to hold.
16-3/4
[425.62]
6-1/32
[153.16]
4-13/64
[106.65]
2-13/16
[71.44]
6-5/32
[156.52]
SPECIFICATIONS
Service:
Dry, clean air.
Temperature Limits:
Process: -20 to
212°F (-29 to 100°C); Ambient: 5 to
125°F (-15 to 51°C)
Display:
4.5 digit backlit display.
Range:
Air velocity: 40 to 5000 fpm (0.2
to 25 m/s); Volumetric air flow: 19,999 in
selected flow units; Temperature: -20 to
212°F (-29 to 100°C); Relative humidity:
0 to 100% RH.
Accuracy:
Air velocity: ±1.5% of reading
±20 fpm (±0.1 m/s) [0.25 to 10 m/s];
±1.5% of reading ±40 fpm (±0.2 m/s) [10
to 20 m/s]; ±1.5% of reading ±60 fpm
(±0.3 m/s) [20 to 25 m/s]; Temperature:
±0.54°F @ 77°F (±0.3°C @ 25°C);
Relative Humidity: ±2% @ 77°F (25°C)
[10 to 90% RH]; ±4% [0 to 10, 90 to
100% RH].
Response Time:
Air velocity: 1 s;
Volumetric air flow: 1 s; Temperature: 1.5
s; Relative humidity: 1.5 s.
Probe Length:
8˝ (203 mm) insertion.
Cable Length:
28˝ (71 cm) retracted; 6´
(18.3 m) extended.
Vane Material:
Anodized aluminum.
Power Requirements:
9 V alkaline
battery, installed non-functional, user
replaceable.
Weight:
18.4 oz (521 g).
Agency Approvals:
CE.
BATTERY INSTALLATION
The unit is shipped with a separate 9 V alkaline battery which must be installed before
operation. Remove the two screws holding the bottom endcap in place and remove it.
Connect the battery to the enclosed battery clip, observing correct polarity. Be careful
not to trap the wires between the case and the foam pad which retains the battery. This
could make it difficult to install the battery or remove it later for replacement. Be sure
the rubber gasket is properly seated in the gasket channel and replace the endcap.
Note that the endcap will only fit one way because the holes are slightly off-center.
Place the “Z” shaped wrist strap clip in one of the screw recesses and replace the
screws. Do not overtighten. Attach the wrist strap to the clip.
When battery replacement becomes necessary, use only 9 V alkaline type batteries
such as Duracell
®
MN1604, Eveready
®
522 or equivalent. Zinc-carbon types, often
labeled Heavy-Duty, are not recommended because of their shorter life and an
increased potential for leakage. Alkaline batteries are a better value because they last
typically up to three times longer in this device.
LOW BATTERY INDICATOR
A weak battery may cause improper operation or inaccurate measurements. A low
battery indicator ( ) is provided on the display to show when the battery needs to
be replaced. Although the unit may appear to function and read properly, the accuracy
of the readings cannot be guaranteed when the ( ) indicator is empty of power
segments. Replace the battery with a fresh one. Do not leave an exhausted battery in
the unit due to potential battery leakage.
Duracell
®
is a registered trademark of The Gillette Company
Eveready
®
is a registered trademark of Eveready Battery Company, Inc.
OPERATING INSTRUCTIONS
ON/OFF/LIGHT
A single press turns unit on, and a second press turns unit off. While unit is on, hold for
2 seconds to turn on the backlight. If the light is active, press once to turn the light off
and another to turn the unit off.
HOLD
A single press freezes the current reading and a second press resumes live process
reading.
MENU
A single press will display the menu. Hit MENU while in the main menu to go back to
the home screen or while in the sub-menus to back up one level.
ENTER
When in the home screen, press to cycle through temperature, dew point, wet bulb, air
velocity, and flow. While in the menu, press to enter sub-menus or values. Press and
hold for 4 seconds to clear MAX, MIN, or MEM in their respective menus.
MEMORY/UP
A single press will retrieve stored data points in the memory. Each successive press
will scroll to the next saved memory location ST01, ST02, etc. While in the menu, it
becomes the UP button.
STORE/DOWN
A single press will store the current reading on the screen. ST01, ST02, etc. shows in
the display to indicate the memory location where the reading was saved. While in the
menu, it becomes the DOWN button.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
®