AccuMed AC-TR121 User manual
Model: AC-TR121
Non-Contact Infrared Thermometer
Instruction Manual
Version: 1.0.0
July 12th, 2021
Thank you for purchasing an AccuMed Non-
Contact Infrared Thermometer!
This device is used to measure an object’s temperature
based on the relationship between temperature and
measurable infrared radiation.
This device is designed to provide a non-contact means
of measuring an object’s temperature based on the
relationship between temperature and measurable
infrared radiation.
Please read the information provided in this manual
throughly before use.
Basic Principles
All objects with an overall temperature of above
absolute zero emit a certain percentage of infrared
radiation. The amount of radiation energy and the
distribution of the wavelengths are closely related to
each other. For instance, when the body temperature
of a person is between 96.8°F (36-37°C) it emits a
wavelength of 9-13um of infrared radiation in which
the device will detect and display a temperature
reading.
Safety Precautions
• The use of this device is not intended as a substitute for
consultation with a physician. It is dangerous for users to
perform a self-evaluation or self-treatment based solely
on the results provided by this device.
• For adult use only. Keep the thermometer out of reach
of children.
• Dispose of dead batteries properly. Do not expose the
batteries to high levels of heat, such as a re.
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• Do not touch the lens of the probe with your ngers. Do
not attempt to disassemble or repair the device.
• This is a precision instrument, do not drop, or use in
areas of extreme vibration.
Version: 1.0.0
July 12th, 2021
• Do not touch the lens of the probe with your ngers. Do
not attempt to disassemble or repair the device.
• Ensure the body temperature is within normal range
before use. Wait at least 30 minutes after eating, bathing,
or exercising before measurement.
• If taking continuous measurements, ensure increments
of one minute in between each reading.
• Do not take temperature measurements over areas of
scar tissue or in other areas such as skin disorders.
• Do not use the device on people undergoing drug
therapies as the body temperature may be slightly
inaccurate.
• Do not use a mobile or cordless phone near the
thermometer when taking measurements.
• Do not immerse the device in water or any other liquid.
• Do not expose the device to direct sunlight or areas of
extreme light.
Temperature Measurement Mode
This device has 2 measurement modes, forehead
temperature mode, which measures the skin surface of
a human forehead, and object temperature
measurement mode, which measures the surface
temperature of an object such as, ambient bathwater,
milk, etc.
Range Descriptions
Normal ranges for dierent measuring positions.
Position Normal Temperature
Forehead 96.4-100.4°F (35.8-38.0°C)
Ear Canal 95.9-100°F (35.5°-37.8°C)
Object 32.0-212.0°F (0-100°C)
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Version: 1.0.0
July 12th, 2021
Normal ranges for dierent measuring positions.
Normal body temperature ranges may vary slightly with
age and gender. Generally, newborns and children have
higher body temperatures than adults. For more
information, please refer to the chart provided below.
Age Range Normal Temperature Range
0-2 years old 36.4°C ~ 38.0°C / 97.5°F ~ 100.4°F
3-10 years 36.1°C ~ 37.8°C / 97.0°F ~ 100.0°F
11-65 years 35.9°C ~ 37.6°C / 96.6°F ~ 99.7°F
>65 years 35.8°C ~ 37.5°C / 96.4°F ~ 99.5°F
Note: Do not take temperatures via the ear canal on children
under three months old.
Typically, temperatures increase by 0.5°C (32.9°F) between
6am and 3pm. Women have a temperature that is typically
higher on average, around 0.2°C (32.3°F). Their temperature
also varies in accordance with their ovarian cycle which can
raise their temperature by 0.5°C (32.9°F) during the second
half of the cycle or during early stages of pregnancy.
° When sitting, the body temperature may lower about 0.3°C
(32.5°F) to 0.4°C (32.7°F) than when standing.
Practical Considerations
-3-
Features
This device has passed an internal reliability and life test
of ≥1000 hours.
Body measurement mode: the measurement range is
89.6-109.4°F (32.0-43°C).
Object measurement mode: 32.0°-212.0°F (0.0-100°C)
When the temperature being read exceeds the
temperature range threshold, the LCD will display a Lo or
hi prompt.
If the environmental temperature exceeds the
temperature range threshold, the LCD will display a Err
prompt.
Version: 1.0.0
July 12th, 2021
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When the battery level is low, the device will display a low
voltage icon on the LCD screen.
When the battery level is low, the device will display a low
voltage icon on the LCD screen.
When the device is placed in a self-test function or is
malfunctioning, the LCD screen will display an ErH or ErE
prompt.
Built in power saving function which will automatically
shut o the device after 60 seconds of idle time.
Tri-color backlight function to indicate the status of the
temperature being read. Refer to the chart below for
temperature range thresholds.
Temperature Range
Color Beep
T<99.5°F (T<37.5°C)
Green
Orange 99.5°F≤T<100.4°F
37.5°C≤T<38.0°C
Red T≤100.4°F (T<38.0°C)
1 long beep
3 short beeps
3 short beeps
The thermometer stores the last 32 temperature
measurements. The last temperature will be automatically
displayed once the device is turned on again after initial
use. A“M” icon will be displayed on the LCD screen.
Memory Mode
Product Structure
Probe
Start/Stop
Display
°F / C° Select
Mode Select
Beep On/O
Battery Cover
T≤109.4°F (T<43.0°C)
Version: 1.0.0
July 12th, 2021
Display Description
Battery icon
Memory icon
°C (Celsius) Scale
°F (Fahrenheit) Scale
Buzzer O icon
Buzzer icon
Readout
Object Mode Icon
Body Mode Icon
Operation Instructions
Insert the batteries based on the correct polarity of the
unit. Before use, ensure the device has been turned on
and calibrated in the measurement environment for 30
minutes. Ensure the probe if free from debris or
obstructions.
1) Operation before measurements
Press the SCAN button. The device will show all
segments on the LCD screen for about 2 seconds. The
last temperature reported by the device will be
displayed along with a“M”icon with a short beep
sound indicating the thermometer is ready for
operation.
2) Measurement Unit Selection
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The thermometer can switch between °C and °F using
the °F or °C. To switch between dierent degree scales.
1. Press the SCAN button to ensure the device is on.
2) Press the C/F button to switch between C or F.
Version: 1.0.0
July 12th, 2021
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Temperature Taking Hints
- Before taking a temperature, remove any hair to
prevent any deviation.
- Ensure any sweat or cosmetics are not impeding the
detection area.
- It is normal to have a temperature dierence
depending on various skin types and color since
dierent skin types will reect dierent infrared
radiation.
- Do not use the thermometer outdoors.
4) Measuring Object Temperature
To measure the surface temperature of an object such as
ambient bathwater, milk, etc. Aim the thermometer
towards the object, press the SCAN button to directly
measure the surface temperature of the object.
5) Automatic Shutdown
If the thermometer remains idle for 60 seconds the device
will automatically be placed in standby mode. The LCD
screen will remain o until the device is activated again.
6) Memory Function
The thermometer stores the last 32 temperature
measurements. The last temperature will be automatically
displayed when it is turned on again the display will show a
“M” icon.
Aim the thermometer towards
the forehead from a distance of
1-6cm (0.4-2.36 inches). Press the
SCAN button directly to
measure the temperature of the forehead. The temperature
will be displayed on the LCD screen along with a short
beep sound.
3) Measuring Body Temperature
1-6cm (0.4-2.36in)
Version: 1.0.0
July 12th, 2021
1) While the device is o, press the M button. The LCD
screen will display, “01” along with the last measurement
taken.
2) Press the“M”button to display additional memory
numbers. The device can hold up to 32 memory channels.
The device will revert to MEM01 after the last channel is
displayed.
Clearing Memory Records
1) While the device is o, press the M button. The LCD
screen will display, “01” along with the last measurement
taken, followed by a short beep.
2) Press and hold the M button for 3 seconds, the LCD
screen will display“CLrM”for 2 seconds and clear all the
records.
Mute/Turn O the Beep Sound
1) Press the SCAN button to power on the device.
2) Press the buzzer button to mute or turn o the beep
sound.
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Battery Life Indicator
Once the thermometer is turned on it
will automatically detect the battery
voltage. When the voltage detected is
too low, the low battery icon will
appear on the LCD screen.
Version: 1.0.0
July 12th, 2021
Note: Always replace the batteries once the low battery
icon appears on the LCD screen.
Replacing the Batteries
The thermometer comes with two AAA (LR 03) batteries. To
install or replace the batteries, open the battery
compartment on the bottom of the device. Remove the
used batteries and insert new batteries into the
compartment based on its polarity. Once they are inserted,
slide the battery door back until it snaps securely into
place.
Anode up
Cathode up
Note: Please dispose of batteries accordingly. Do
not liter, dispose of in the trash, or throw them into
a re. Please consult your local laws in regard to
battery disposal.
Cleaning and Disinfecting
The probe tip and lens are the most sensitive parts of the
thermometer. It is highly recommended to keep the
device clean and intact for the most accurate readings..
° Gently wipe the surface of the probe tip with a cotton
swab or soft cloth lightly damped with alcohol. Only use
the device after the alcohol has been completely dried.
° Do not continue use if the lens is damaged.
° To clean the body of the thermometer, use a soft, dry
cloth. If the device is extremely dirty, the soft cloth can be
damped with alcohol.
Note: Do not use abrasive cleaners. The device is not
waterproof, do not submerge the device in water or other
liquid.
Maintenance
-8-
Do not attempt to maintain or repair this device. If the
product is damaged or defective, please contact AccuMed
directly. Please visit: https://accumed.com/contacts/
Version: 1.0.0
July 12th, 2021
Opening or attempting to repair the device will void the
warranty. Please do not attempt to repair or modify the
device.
Calibration
The thermometer is calibrated by default. If the
thermometer is regularly used as instructed, periodic
readjustment is not required. If at any time you have
questions regarding the accuracy of measurements being
taken, please contact AccuMed directly.
Storage
Do not store the device in areas of direct sunlight, high
temperatures, or areas with high levels of moisture or
humidity.
Do not store the device in areas prone to re or intense
vibration.
Please remove the batteries from the device if it is not
being used for prolonged periods of time.
Problem Problem Cause Solution
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Troubleshooting
The thermometer does
not turn on.
Low Battery
Reversed polarities of the
batteries.
The thermometer is
damaged.
Change the batteries
Properly install the
batteries.
Contact AccuMed
The thermometer
shows“Hi” on the LCD
screen.
Temperature being read
exceeds 109.2°F (42.9°C)
Temperature readings are too
close together.
Leave the device idle
and wait 30 minutes
before next temperature
reading
The thermometer
shows“Lo” on the LCD
screen.
Temperature being read is
below 93.2°F (34.0°C).
The measuring distance is too
far from the measurement
surface.
Leave the device idle
and wait 30 minutes
before next temperature
reading
The ambient temperature is
above the range of the
measurement range
(50°F - 104.0°F / 10°C - 40°C)
Keep the
thermometer in an
area between
50°F-104°F
(10°C-40°C) for 30
minutes before next
use.
Version: 1.0.0
July 12th, 2021
Problem Problem Cause Solution
The hardware is
damaged.
Do not attempt to
repair or modify the
device. If the hardware
is damaged, please
contact AccuMed
directly for a
replacement.
The battery is low however
it can still be used.
Replace the batteries if
they are too low for
unit.
The battery is low however
it cannot use the device.
Technical Specications
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Device Name Infrared Thermometer (Non-Contact Type)
Model
Measurement Mode Non-contact forehead measurement mode (Adjusted)
Measurement Site Forehead
Measurement
Distance 0.4 - 2.36in (1-6cm)
Power Supply DC 3V, 2x1.5V AAA (LR03) Batteries
Body Measurement
Range 89.6°F-109.4 (32.0-43°C)
Object Measurement
Range 32.0°F-212.0°F (0.0°C-100.0°C)
Resolution of Display 0.1°F / 0.1°C
Measuring Accuracy (At
laboratory conditions)
±0.4°F / ±0.2°C during the following ranges: 95°F-107.6°F.
±0.5°F / 0.3°C during the following ranges: 89.6°F-94.9°F
(32.0°C-34.9°C) and 107.8°F-109.4°F (42.1°C-43.0°C).
Storage Conditions -13°F-131.0°F (-25-55°C), Relative humidity
≤RH95%, 70-106kPa
Clinical Repeatability Within ±0.5°F (±0.3°C)
AC-TR121
Measuring Time Up to 1 Second
Version: 1.0.0
July 12th, 2021
Operating Conditions 50°F-104°F (10-40°C), Relative humidity, ≤RH95%,
70-106KPa
Size (Dimensions) 5.69” x 1.45° x 1.53° (144.6mm x 37.0mm x 39.0mm)
Weight 0.19lbs (87g)
High Body Temperature ≤100.4°F (38.0°C)
Waterproof Grade IP22
Electric Shock Internally powered ME equipment
Applied Part Type BF applied part, including the whole unit
Mode of Operation Continuous Operation
Battery Life ≥1000 times
Product Life 2 years
Software Version V1.0
Note: Not intended to be sterilized.
Not for use in an OXYGEN RICH ENVIRONMENT
Standard List
EN980 Symbols for use in the labeling of medical devices.
EN1041 Information supplied by the manufacturer with medical
devices.
EN60601-1
Medical electrical equipment Part 1: General requirements
for basic safety and essential performance.
EN60601-1-2
Medical electrical equipment Part 1-2: General
requirements for basic safety and essential performance.
- Collateral standard: Electromagnetic compatibility -
Requirements and tests.
EN60601-1-6
Medical electrical equipment Part 1-6: General
requirements for basic safety and essential performance.
- Collateral standard: Usability.
EN60601-1-11
Medical electrical equipment Part 1-6: General
requirements for basic safety and essential performance.
- Collateral standard: Requirements for medical electrical
equipment and medical electrical systems used in home
healthcare environment.
EN12470-5
Clinical thermometers - Part 5: Performance of infrared ear
thermometers (with maximum device).
ASTM E1965-98
Standard Specication for Infrared Thermometers for
Intermittent Determination of Patient Temperature.
ISO 80601-2-56
Medical electrical equipment part 2-56: particular
requirements for basic safety and essential performance of
clinical thermometers for body temperature measurement.
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≤109.4°F (43.0°C)
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July 12th, 2021
EN62304 Medical device software - Software life-cycle processes.
EN62366 Medical devices - Application of usability engineering to
medical devices.
EN ISO 10993-1 Biological evaluation of medical devices - Part 1:
Evaluation and testing within a risk management process.
Disposal
Dispose of the device in accordance with the
regulations applicable at the place of operation.
Dispose of at public collection points in the EU
countries - 2002/96/EC WEEE Directive.
For any questions, please refer to the local authorities
responsible for waste disposal.
Note: Take out the batteries if you are not going to use the
device for long periods of time.
To protect the environment, dispose of empty
batteries at appropriate collection sites
according to national and local regulations.
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EMC Declaration
This digital thermometer needs special precautions
regarding EMC and needs to be installed and put into
service according to the EMC information provided in
the accompanying documents.
Wireless communications equipment such as wireless
home network devices, mobile phones, cordless
telephones and their base stations, walkie-talkies can
aect this equipment and should be kept at least a
distance d=1.0m away from the equipment.
Note: As indicated in IEC 60601-1-2 for ME Equipment, a
typical cell phone with a maximum output power of 2W
yields d=1.0m at an immunity level of 10V/m.
Version: 1.0.0
July 12th, 2021
Copyright © 2020 AccuMed. All rights reserved.
Designed by AccuMed. Assembled in China.
https://accumed.com
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