Dwyer 471B User Manual

Model 471B Digital Thermo Anemometer

Specifications and Operating Instructions

PECIFICATIONS

S

ervice: Air velocity and temperature of clean, dry air.

S

emperature Limits:

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rocess Air Velocity: -20 to 212°F (-29 to 100°C);

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Process Temperature: -40 to 212°F (-40 to 100°C);
Ambient: 5 to 125°F (-15 to 51°C).

Display: 4.5 digit LCD.

esolution: 0.1%, 0.1°F/°C.

R

ange Air Velocity: 0 to 6000 FPM (0 to 30 m/s).

R

ccuracy Air Velocity: ±3% FS within temperature range of 40 to 90°F (4 to

A

2°C).

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Range Volumetric Air Flow: 19,999 in selected flow units.
Range Temperature: -40 to 212°F (-40 to 100°C).
Accuracy Temperature: ±0.5°F (±0.28°C) from 32 to 122°F (0 to 50 °C); ±1.5°F

±0.83°C) from -40°F to 32°F (-40 to 0°C) & 122 to 212°F (50 to 100°C).

(

robe Length: 8˝ (203 mm) insertion.

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able Length: 28˝ (71 cm) retracted, 6 ft (183 cm) extended.

C
Power Requirements: 9V alkaline battery included.
Weight: 16 oz (454 g).
Agency Approvals: CE, RoHS.

ulletin TE-471B

B

The Model 471B Digital Thermo Anemometers are versatile dual function

instruments that quickly and easily measure air velocity or volumetric flow plus air
temperature in imperial or metric units. High contrast LCD display shows both
selected readings simultaneously. Convenient backlight provides perfect visibility in

ow light conditions. Light automatically shuts off after 2-1/2 minutes to prolong

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attery life. Low battery warning is included. Stainless steel probe with comfortable

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hand grip is etched with insertion depth marks from 0 to 8 inches and 0 to 20 cm.
Extruded aluminum housing fully protects electronics, yet is lightweight and
comfortable to hold even when taking multiple readings as part of duct traverses.
Up to 99 readings may be stored for later retrieval. An integral sliding cover protects
sensors when not in use. Items included with the 471B are 9 volt alkaline battery,
sensing probe, wrist strap and custom carrying case.

Battery Installation

The unit is shipped with a separate 9 volt 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 or 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 volt alkaline type
batteries such as a Duracell
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.

®

MN1604, or Eveready®522 or equivalent. Zinc-

OPERATING INSTRUCTIONS

NOTICE

DWYER INSTRUMENTS, INC.

The side of the probe with dot should face the flow.

Duracell® is a registered trademark of The Gillette Company

®

Eveready

is a registered trademark of Eveready Battery Company, Inc.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]

HOLD

Memory

HOLD will appear on the home screen when the HOLD button is pressed, indicating

he process reading has been frozen.

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Memory Storage and Retrieval

rom the home screen, push MEMORY/UP to view all previously stored values. Cycle

F
up or down through the stored data with the MEMORY/UP or STORE/DOWN buttons.
From the home screen, press STORE/DOWN to store data points to memory. For both
data storage and data memory retrieval, press MENU to return to the home screen.

MENUS
Maximum

Push ENTER to see the maximum recorded reading. When viewing the maximum
recorded reading, hold ENTE R for 4 seconds to clear. Push MEMORY/UP or
STORE/DOWN to cycle through parameters.

Minimum

ress ENTER to see

P

ocations.

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Hold ENTER for 4 seconds to clear all stored memory

DEL.

Engineering Units

ress ENTER to see current engineering units. Press MEMORY/UP or STORE/DOWN to

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select another unit.

Area

Press ENTER to view the current duct shape setting. for rectangular or
for circular will appear. To alter between the two, push the MEMORY/UP button or
STORE/DOWN buttons. If a circle duct shape is selected, press ENTER to see the
diameter value. If rectangle is chosen, ENTER will allow adjustment of the and

of the duct. A numeral position will blink indicating it can be adjusted with the

MEMORY/UP or STORE/DOWN buttons. Hit ENTER to store a value.
Note: In metric mode dimensions will be displayed in mm. Inches will be the value
when using imperial units.

Power Management

Push ENTER to see the minimum recorded reading. When viewing the minimum
recorded reading, hold ENTER for 4 seconds to clear. Push MEMORY/UP or
STORE/DOWN to cycle through parameters.

Average

Press ENTER to view the AVG function. This function will adjust the process reading
on the home screen to report the average reading over the period of selected time.
Press MEMORY/UP or STORE/DOWN to select between 0, 10, 30, or 60 second values.
Push ENTER to store the desired value.

©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 5/14 FR# 02-443916-00 Rev. 3

DWYER INSTRUMENTS, INC.

Pu sh ENTER to see current time off setting. Select 30 or 10 values indicating minutes
for power to automatically shut-off. By selecting 0, the auto shut-off is disengaged
and the unit will only turn off manually by the ON/OFF/LIGHT button.

MAINTENANCE/REPAIR

Upon final installation of the Model 471B, no routine maintenance is required. The
Model 471B is not field serviceable and should be returned if repair is needed.
Field repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sales” in our catalog and on our website.
Contact customer service to receive a Return Goods Authorization number before
shipping the product back for repair. Be sure to include a brief description of the
problem plus any additional application notes.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]