Omega RH820, RH820W, RH820U Instruction Sheet

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MADE IN TAIWAN

RH820, RH820U USB & DC Power
RH820W Wireless

M4740/0109

Shop online at: omega.com e-mail: [e-mail]

For latest product manuals: omegamanual.info

INSTRUCTION

SHEET

Hydro Thermometer

“HOLD” key to stop reading, all values are frozen, press
“HOLD” key again to restart reading.

5. “MAX/MIN” Button

Press “MIN/MAX” key to enter the MIN/MAX re-

co

rding mode and REC shows o n the display. The

beepe

r emits a tone when a new minimum or maximum
measurement is re corded. Press “MI N/MAX” key again
to

cycle through the current readings:

MAX:

The highest measurement recorded.

MIN:

The lowest measurement recorded.
MA

X-MIN: The difference of the highest and the low-

est

measurement.
AVG: The average values of the measurements.

Press “MIN/MAX” key over two seconds to exit the

functi

on. In this mode, press “HOLD” key to stop re­cording,

all values are frozen, press “HOLD” key again

to

restart recording. In this mode, the APO f unction and

othe

r keys are disabled, excluding “HOLD” and

Back

-light keys. Press and hold down the “MAX/MIN”

ke

y for more than 2 seconds to exit the MAX/MIN

functi

on.

6. “HOLD” Button

Press the “HOLD” key to enter the data hold mode, the
“HO

LD” annunciator i s displayed at the center-left of

displa

y. When data hold mode is selected, the meter held
the present readings and stops all further measurements.
Press the “HOLD” key again to cancel data hold mode,
causing

meter to resume taking measurements.

7. “WB/DP” Button

In the NTC data Mode, the Meter displays a mbient
temperature when first turned on. To display wet
bulb (WB) temperature, press “WB/DP” key once. Press
the

“WB/DP” again to switch to d ew point (DP) tem-

perature

. Press “WB/DP” a third ti me returns the Meter

to

ambient temperature.

8. “K/NTC/K-DP” Button

Press the “K/NTC/K-DP” key, the meter can cycle
th

rough “K-TYPE”, “NTC”, “K-DP”.

K

-DP = K-TYPE temperature minutes Dew point

temperature.

9. “SAVE” Button

The save func tion stores the %RH, K-TYPE, NTC,
Wet bulb, Dew point data i n a nonvolatile memory.
Press

the “SAVE” key to save the current data, the word
SAVE is displayed to indicate the data are saved. The
build

in memory can store up to 256 data.

10. “READ”, “ ”, “ ” Button

To recall the readi ngs from memory, press “READ”

ke

y. To check the memorized data just to press “

” or
“ ” until the desired memorized data is displayed. To
return the meter to normal operation, pres s “READ” key
again.

CLR SAVE DATA:
Pressing the “

” key for more than 5 seconds to

clea

rs all the saved data in memory. And lower display

show

“Clr” about 2 second.

11. WIRELESS MODE: (820W)

Press the “ ” key for more than two seconds to start

wi

reless function. Press the “ ” key again for another

two

seconds to stop wireless f unction. The wirel ess
mode will shut down if there is no wireless signal for
two minutes.

To SET CH/ID to 00,00, press the “ ” key and “

”

powe

r key for more than 6 seconds with the meter pow-

ered

down. The meter will set channel and ID to 00,00

status.

The second display will show 00, which means

that

the channel and ID has been set to 00.

To

check the channel and ID of the meter:

When the meter is off, press “°C/°F” key and “

”

for

5 seconds, LCD’s main display will show channel

number, the second display will show ID number.

OPERATOR MAINTENANCE

WARNING

To avoid possible electrical shock, disconnect the

ther

mocouple connectors from the thermometer before

removing the cover.

Battery Replacement

1. Power is supplied by 4pcs 1.5V (SIZE AAA) UM-4
R03

.

2. The “ ” appears on the LCD display when replace­ment is needed. To replace battery remove screw from
back

of meter and lift off the battery cover.

3. Remove the battery from battery contacts and replace.

4. When not use for long time remove battery.

5.

Don’t keep in place with high Temp, or high humidity.

Cleaning

Periodically wipe th e case w ith a damp cloth and deter-

ge

nt, do not use abrasives or solvents.

*Soft

ware operation manual is on the software disk.

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in
material

s and workmanship for a period of from date of pur­chase. OMEGA’s WARRA NTY adds an addi tional one ( 1) month grace
perio

d to the normal to cov er handling and
shipping time. This ensure s that OMEGA’s cust omers receive maximum
coverage on each product.

If the uni t malfunctions, it m ust be re turned to the factory for evaluation.
OMEGA’

s Custom er Service Department wi ll issue an A uthorized Return

(AR

) number immediately upon phone or writt en request. Upon examination
by OMEGA, if the unit is found to be defective, it will be repaired or replaced
at no charge. OMEGA’s WARRANTY d oes not ap ply to defects resulting
fro

m any action of the purchaser, including but not limite d to mishandling,

imprope

r interfacing, ope ration outside of desi gn limi ts, improper repair, or

unau

thorized modifica tion. This WA RRANTY is VOID if the unit shows

evidenc

e of having been tampered with or shows evidence of having been

damage

d as a res ult of excessi ve corrosion; o r c urrent, heat, mois ture or

vibra

tion; improper specification; misapplication ; misuse or other operating

condition

s out side of OMEG A’s cont rol. Compon ents wh ich wea r is not

warranted, include but are not limited to contact points, fuses, and triacs.

CONDITIONS: Equipment sold by OMEGA is not inten ded to be used, nor
shal

l it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used
in or with any nuclear installation or activity ; or (2) in medical applications or
use

d on h umans. Should any Product(s) be used in or with any nuclear

ins

tallation or activity, medical application, used on humans, o r misused in

an

y way, OMEGA as sumes no responsib ility as set forth in our basic
WARRANTY / D ISCLAIMER lan guage, and, ad ditionally, purchase r will
indemnif

y OMEGA and hold OM EGA harmless from any liability or damage

whatsoever arising out of the use of the Product(s) in such

a manner.

Direct all warranty and repair request s / inquiries to t he OMEGA Customer
Servi c

e D epartment . BEF ORE RETUR NING ANY PR ODUCT(S) TO

OMEGA

, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)

NUMBE

R FROM OM EGA’S CUSTO MER S ERVICE DEPART MENT (IN

ORDE

R TO AVOID PROCESSI NG DELAYS ). The assi gned AR number

shoul

d then be marked on the outs ide of th e r eturn package and on any
correspondence.
The purchaser is responsib le for shipping charg es, freight, insu rance

and

proper packaging to prevent breakage in transit.

FOR

RETURNS,
please have the following
information available BEFORE
contacting OMEGA:

1. Purchase Order number under

which the product was
PURCHASED,

2. Model and serial number of the

product under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR
REPAIRS, consult OMEGA for
current repair charges. Have the
following information available
BEFORE contacting OMEGA:

1. Purchase Order number to cover
the COST of the repair,

2. Model and serial number of the
product, and

3. Repair instructions and/or specific
problems relative to the product.

OMEGA’s policy i s to make running changes, not model changes, whenever
an improvem ent is possible. This affords our customers the latest i n tech­nology and engineering.
OMEGA is

a registered trademark of OMEGA ENGINEERING, INC.
© Cop yright 2009 OMEGA ENG INEERING, INC . All rights reserved. This
documen

t may n ot b e co pied, photocop ied, reproduc ed, tr anslated, or
reduced to any electronic medium or machine-readable form, in whole or in
part, without the prior written consent of OMEGA ENGINEERING, INC.

Where Do I Find Everything I Need for

Process Measurement

and Control?

OMEGA…Of Course!

Shop online at omega.com

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Computers
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Instruments

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Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: sales@omega.n

l

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Republic: Toll-Free: 0800-1-66342 TEL: [phone]

FAX: [phone] e-mail: [e-mail]

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r

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Austria:

Tel:+ 49 (0)7056 9398-0 FAX: [phone]
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e

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d River Bend Technology Centre, Northbank

Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Servicing North America:

U.S.A.: OMEGA Engineering, Inc.

ISO 9001 Certifie

d One Omega Drive, P.O. Box 4047

Stamford, CT 06907-0047 US

A
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Canada: 976 Bergar, Laval (Quebec), Canada H7L 5A1

Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: info@omega.c

a

For immediate technical or application assistance:

U.S.A. and Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Canada: Customer Service: 1-800-622-2378 1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico: En Español: 001 [phone] FAX: [phone]

[e-mail] e-mail: [e-mail]

OMEGAnet®On-Line Service I nternet e-mail

omega.com info@omega.c o

m

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its
products to the European New Approach Directives. OMEGA will add the CE
mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but
OMEGA Engineering, Inc. accepts no liability for any errors it contains, an

d

reserves the right to alter specifications without notice.

WARNING:

These products are not designed for use in, and should not be

used for, human applications

.