Omega OS-821 Series User manual

User’s Guide
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OS820-Series
Non-Contact Body IR
Thermometer with 3 Color Alarm
Backlight Display
TM

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves
the right to alter specifications without notice.
Servicing North America:
U.S.A. Omega Engineering, Inc.
Headquarters: 800 Connecticut Ave. Suite 5N01, Norwalk, CT 06854
omega.com [email protected]
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: [phone] Fax: [phone]
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide

Non-Contact Body IR Thermometer with 3 Color Alarm Backlight Display
OS820-Series
User Manual
Features:
Two measurement modes: Human body
temperature and object surface
temperature
Data storage up to 34 temperature
records
3-color alarm backlight display: green,
orange and red
Product Introduction:
This product is a handheld non-contact infrared
thermometer, with two possible measurement
modes: human body temperature measurement
and object surface temperature measurement
modes. It features: temperature data storage
up to 34 records, high temperature alarming,
temperature range indication based on different
backlighting color, and auto shut-off.
Product Description:
1. LCD Display: indicate measured
temperature
2. Backlight button: turn on/off backlight
(Hold to change)
3. Left Button: during the measurement
mode, page up the stored temperature
data records; activate the parameter
setting mode; or during the parameter
setting mode, navigate the settings
menu
4. Right Button: during the measurement
mode, page down the stored
temperature data records; or during the
parameter setting mode, adjust
parameters.
5. Mode button: switch between
measurement modes or switch
between English and Chinese display.
6. IR sensor: point to the measuring object
during measurement
7. Trigger: start measurement and turn on
unit
8. Battery cover: open to change battery
Product Information:
Storage Temperature
14
-
140
⁰
F
(
-
10
-
60
⁰
C
)
Operating Temperature
50
-
104
⁰
F
(
10
-
40
⁰
C
)
Battery Voltage
2x AA
(
1.5
V
x2
) Batteries
,
not
included
Pro
duct Weight
122g
Product Dimension
145 x
8
0 x 40 mm
1.
2.
4.
5.
3.
7
.
6.
8.

Technical Specification:
Human Body Temperature Measurement Range
89.6
-
10
8.5
⁰
F
(32.0
-
42.5
⁰
C)
Human Body Temperature Measurement Accuracy
±
0.
6
⁰
F
(±
0.3
⁰
C)
Object Surface Temperature
Measurement Range
32
-
212
⁰
F
(0
-
100
⁰
C)
Object Surface Temperature Measurement Accuracy
±1
⁰
C (
±1.8
⁰F
)
Resolution
0.1
⁰
C (0.1
⁰
F
)
Response Time
0.5s
Distance to Measuring object
1.9
-
3.
2
”
(5
-
8 cm)
Auto shut
-
off
7s
Function Settings:
Press and hold «SET (left button) until you see
“F1” appear in bottom right corner of screen.
Press «SET (left button) to navigate between
the following setting menus: F1 (Unit)  F2
(Temperature Offset)  F3 (Audio On/Off) 
Exit Setting Menu. See each setting section for
more details:
Changing Temperature Units from C to F (F1)
Press and hold «SET (left button) until you see
“F1” appear in bottom right corner of screen.
While showing F1 Symbol in bottom right
corner of the display, press »ADJ to switch
between ⁰C and ⁰F.
Temperature Offset Setting (F2)
With F2 Symbol showing in bottom right corner
of the display, press »ADJ (to increase) and
MODE (to decrease) to adjust the temperature
offset within the range of ±9⁰F ( ±5⁰C).
Note: This offset option only works for body
temperature mode.
Audio ON/OFF Setting (F3)
With F3 Symbol showing in bottom right corner
of the display, press »ADJ to turn on/off audio.
During the parameter setting mode, press the
trigger to directly exit from the setting mode.
Mode Switch
Press MODE button to switch between Human Body Temperature measurement
and Surface Temperature Measurement modes.
Press and hold MODE button to switch between display languages.

Temperature Measurement
Point to the measuring object at a range of 1.9-
3.2” (5-8 cm) and press the trigger to begin the
measurement. The display screen will display
the temperature immediately within the
response time.
Surface temperature measurement mode:
Keeping the trigger pressed, the display will
indicate the object surface temperature live
with green backlight.
Body temperature measurement mode:
Press the trigger button once to take one
measurement. The number on the button left
corner shows the record number. The backlight
color indicates the different temperature range
as follows:
Green: Below 99.5⁰F (37.5⁰C)
Orange: 99.5-100.4⁰F (37.5⁰C-38⁰C)
Red: Above 100.4⁰F (38⁰C)
Data Record Management:
View Data Record
Press «SET (left button) and use »ADJ (right
button) to page up and down among the data
records.
Delete Data Record
Press and hold »ADJ (right button) to delete the
current data record. If the audio is on, the
device will beep once.
Battery installation and replacement
When the battery is running low, the screen will display a battery symbol at bottom left corner.

Precautions before first use
1. Install batteries before use
2. Before first use, warm up the device for about 10 minutes before installing the battery.
3. When using it for body temperature measurement point thermometer at the forehead. This is a
non-contact thermometer and the suggested measuring distance to the forehead is 2” (5 cm).
Press the trigger once to take one temperature measurement. Tip: temperature can also be
measured at an earlobe.
4. When measuring body temperature, please make sure there are no obstacles between the IR
sensor and forehead skin, e.g., move hair or sweat if obstructing measurement.
Warnings
The glass protector in front of the IR sensor is a critical but very fragile element of the device.
Use cotton and 70% rubbing alcohol for cleaning.
Please only use qualified battery. Do not charge batteries that are not rechargeable.
Do not use the thermometer under the sun or under water.
Maintenance
Please follow the instruction manual for troubleshooting. If the issue is not listed in the
manual, please contact our customer support.
Warning sign “HI”
When using the thermometer for measuring body temperature, the “HI” warning sign may
come on. The warning sign indicates the temperature measured exceeds the maximum
allowed threshold 108.5⁰F (42.5⁰C).
Warning sign “LO”
When using the thermometer for measuring body temperature, the “LO” warning sign may
come one. The warning sign indicates the temperature measured exceeds the minimum
allowed threshold 89.6⁰F (32.0⁰C).
Troubleshooting
When using the thermometer in body temperature mode, if a “HI” or “Lo” warning sign is
displayed and it is suspected that the temperature is incorrect please follow these steps:
1.) Switch to surface temperature mode, measure temperature of any surface.
2.) If the temperature looks correct, then go to menu (F2).
3.) Check the offset, the offset should be set to 0⁰C (0⁰F).
4.) If offset not set to 0⁰C (0⁰F), then set offset to 0⁰C (0⁰F).
5.) Switch back to body temperature mode and measure body temperature again, body
temperature should now be accurate.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a trademark of OMEGA ENGINEERING, INC.
© Copyright 2019 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
FOR WARRANTY 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 NON-WARRANTY 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.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written 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 does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for
any damages that result from the use of its products in accordance with information provided
by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall 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 used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

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