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IRT 3020
IRT 3520
/ mem
Type 6012
Type 6013
Manufactured by:
Braun GmbH
Frankfurter Str. 145
61476 Kronberg / Germany
Printed in Germany
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IRT 3520
Configuration A
/ mem
Configuration B
IRT 3020
Configuration A
/ mem
Configuration B
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The Braun ThermoScan thermometer has been carefully developed for accurate,
safe and fast human body temperature measurements in the ear. The shape of
the thermometer prevents it from being inserted too far into the ear canal to damage
the eardrum.
However, as with any thermometer, proper technique is critical to obtaining
accurate temperatures. Therefore, please read all instructions carefully and
thoroughly before using this product and keep the manual handy for future
• The operating ambient temperature range for this thermometer is 50 °F to 104 °F
(10 °C to 40 °C).
• Do not expose the thermometer to temperature extremes below - 4 °F or over 122 °F
( - 20 / 50 °C) or excessive humidity ( > 95 % RH non-condensing).
• This thermometer must only be used with genuine Braun ThermoScan Lens Filters
(LF 40). Never use this thermometer without a new, clean lens filter attached.
• If the thermometer is ever accidentally used without a lens filter attached, clean
the lens (see «Care and cleaning»).
• Always store thermometer in travel case, protective cover or plastic case.
• Basic safety precautions should always be observed, especially when using
the thermometer on or near children and disabled persons.
• Keep lens filters out of reach of children.
• This thermometer is intended for home use only.
• Use of this thermometer is not intended as a substitute for consultation with
your physician.
• Do not leave thermometer or lens filters with infants or children at any time.
How does Braun ThermoScan work?
The Braun ThermoScan thermometer measures the infrared heat
generated by the eardrum and surrounding tissue. To help ensure
accuracy, the thermometer «scans» by taking 8 measurements in
just one second and displaying the highest temperature.
The displayed ThermoScan temperature is the actual measured
ear canal temperature plus a mathematical adjustment to approximate
the familiar oral range. However, this is not necessarily the same as
an oral temperature measured at the same time.
Why measure in the ear?
The goal of thermometry is to measure core body temperature,
which is the temperature of the vital organs. Clinical studies have
shown that the ear is an excellent site to measure body temperature,
since ear temperatures reflect core body temperature. The eardrum
shares blood supply with the temperature control center in the brain,
the hypothalamus, allowing changes in body temperature to be
reflected sooner in the ear than at other sites.
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• Axillary temperatures reflect skin temperature which may not indicate core body
• Oral temperatures are influenced by drinking, eating and breathing through the
• Rectal temperatures often lag behind changes in core body temperature and there
is a risk of cross-contamination.
Body temperature
Normal body temperature is a range. The following table1 shows that ranges of normal also vary by site. Therefore, readings from different sites, even if taken at the
same time, should not be directly compared.
94.5 °F - 99.1 °F
34.7 °C - 37.3 °C
95.9 °F - 99.5 °F
35.5 °C - 37.5 °C
97.9 °F - 100.4 °F
36.6 °C - 38.0 °C
96.4 °F - 100.4 °F
35.8 °C - 38.0 °C
• Also, a person’s normal temperature range tends to decrease with age. The following table shows normal ThermoScan ranges by age.
Normal ThermoScan temperature ranges2
0 - 2 years
97.5 °F - 100.4 °F
36.4°C - 38.0 °C
36.1°C - 37.8 °C
3 - 10 years
97.0 °F - 100.0 °F
11 - 65 years
96.6 °F - 99.7 °F
35.9°C - 37.6 °C
> 65 years
96.4 °F - 99.5 °F
35.8°C - 37.5 °C
• However, the range of normal also varies from person to person and fluctuates
throughout the day. It is therefore important to determine your and your family
members’ normal temperature ranges. This is easily done using Braun ThermoScan.
Practice taking temperatures on yourself and healthy family members to determine
their normal temperature ranges.
Note: When consulting your physician, communicate that the ThermoScan temperature is a temperature measured in the ear and if possible, note the individual’s normal
ThermoScan temperature range as additional reference.
1. Chamberlain, J.M., Terndrup, T.E., New Light on Ear Thermometer Readings, Contemporary Pediatrics,
March 1994.
2. Chamberlain, J.M., et al., Determination of Normal Ear Temperature with an Infrared Emission Detection
Thermometer, Annals of Emergency Medicine, January 1995.
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Product description
Lens filter
Probe tip
Lens filter detector
Lens filter ejector
Display (LCD)
LCD light button
(IRT 3520 only)
/mem button (On/memory function)
Battery door lock
Battery door
Activation button
Travel case/protective cover/storage pouch
(depending on configuration)
Package components
Braun ThermoScan thermometer
Use and Care manual
Quick Reference Guide
Lens filters (20, plus one on the thermometer)
Owner registration/warranty card
Additional items may be included as noted on
outer packaging
• Label
The first time you use the thermometer, please
make sure to apply the special label included
in the package, in the language of your choice
(Item 12 on page 3).
How to use Braun ThermoScan
1. Always make sure a new, clean lens filter is
in place to help ensure an accurate reading.
The thermometer will not function without a
lens filter attached (see Changing the lens
2. Press the /mem button.
The LCD (liquid crystal display) is activated,
showing all segments.
When the ready symbol
is displayed
the thermometer is ready for use.
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To help ensure an accurate temperature
reading, use the following technique: If you are
right handed, hold the thermometer in the
right hand and take the temperature in the right
ear. If you are left handed, hold it in the left
hand and use the left ear.
3. Perform an ear tug to straighten the ear canal.
This gives the thermometer a clear view of the
Children under 1 year:
Pull the ear straight back.
Children aged 1 year to adult:
Pull the ear up and back.
An ear tug is best performed by using your free
hand to grasp the outer edge of the top half of
the ear. To take your own temperature, wrap
your free hand around the back of your head
and grab your ear from behind.
4. While tugging the ear, fit the probe snugly into
the ear canal as far as possible and press the
activation button. Release it when you hear a
beep. This is the Temp Beep that confirms the
end of measurement.
5. Remove the thermometer from the ear canal.
The LCD displays the temperature measured.
6. Replace the lens filter after each measurement: press the ejector button and put on a
new, clean lens filter.
7. A new measurement can be taken as long as
the ready symbol
is shown. If no button
is pressed within 2 minutes, the thermometer
will turn off automatically.
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Note: In the following situations, it is recommended that you
take three temperatures in the same ear. If they differ, use the
highest reading.
• Infants in the first 90 days of life.
• Children under three years of age who have a condition
such as a compromised immune system and for whom the
presence or absence of fever is critical.
• When you are first learning to use the ear thermometer until
you are comfortable with the technique and are obtaining
consistent readings.
Important: As with any type of thermometer, slight temperature
variations ( ± 0.3 - 0.5 °F / ± 0.2 - 0.3 °C) can occur, if consecutive measurements are taken.
Temperature taking hints
• The right ear reading may differ from the reading taken at the left
ear. Therefore, always take the temperature in the same ear.
• The ear must be free from obstructions or excess earwax buildup to take an accurate reading.
• External factors may influence ear temperatures, including when
an individual has:
- been lying on one ear or the other
- had their ears covered
- been exposed to very hot or very cold temperatures, or
- been recently swimming or bathing.
In these cases, remove the individual from the situation and wait
20 minutes prior to taking a temperature.
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Memory mode
The last temperature taken before the thermometer powers down is stored in memory. To enter
the memory mode, press the /mem button.
Even in memory mode, a new temperature can be
taken provided that the ready symbol is
IRT 3020
The last stored temperature is displayed along
with the MEM symbol. To quit the memory mode,
press the /mem button again.
IRT 3520
This model allows you to store up to 8 temperatures.
When pressing the /mem button, the display
shows the memory cell number (e.g. MEM 1).
When releasing the /mem button, the stored
temperature is displayed.
Each time the /mem button is pressed, a new
memory cell is displayed (up to MEM 8).
An empty memory cell shows «- - - °F».
Only the first empty memory cell will be displayed.
To quit the memory mode, press the /mem
button again after reaching MEM 8 or «- - - °F».
Memory clear
Press the /mem button for 5 seconds to clear
the temperatures stored in memory. Release the
/mem button to return to the ready symbol
LCD light (model IRT 3520 only)
For easy nighttime reading.
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Changing the temperature scale
This thermometer is shipped with the Fahrenheit temperature
scale activated. If you wish to switch to Celsius (°C), proceed as
• Turn on the thermometer.
(If it is already turned on, make sure it is not in memory mode.)
• Press the /mem button and keep it pressed. Then press and
release the activation button to switch over to the «change
temperature scale» mode.
• By pressing the activation button again, the Celsius scale is
activated, «°C» is displayed on the LCD. Each further pressing
of the activation button toggles the scale between °C and °F.
IRT 3020
• Release the
/mem button to return to the ready symbol
All temperatures stored in memory will automatically be converted
to the selected scale when displayed on the LCD.
IRT 3520
Changing the lens filter
The thermometer is supplied with a lens filter in place. To assure
accuracy and sanitary practice, Braun recommends replacing the
lens filter after each use. To install a new lens filter, first remove
the one in place by pressing the lens filter ejector. Check the lens
for any damage. Then take a new lens filter from the box, and holding it by its edges, slide it onto the probe until it snaps in place.
Caution: Do not touch the tip of the probe or lens filters
when installing. Fingerprints, ear wax, dust and other soiling
compounds reduce the transparency, resulting in lower temperature readings (see also Care and cleaning).
Should you run out of lens filters and need to take a temperature,
you may use the following lens filter cleaning procedure:
• Clean the lens filter without removing it from the thermometer
with a soft cloth or cotton swab moistened with alcohol.
Do not use hot or boiling water.
• Dry completely with a soft cloth before reusing.
• Replace lens filter as soon as possible with a new one (LF 40 ).
• Additional lens filters (LF 40 ) are available at most stores
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carrying Braun ThermoScan thermometers or at Braun Service
• If you have accidentally placed the thermometer in your ear without a lens filter in place, be sure and clean the probe (see
«Care and cleaning» and then apply a clean lens filter.
Care and cleaning
The probe tip is the most delicate part of the thermometer.
It has to be clean and intact to ensure accurate readings.
If the thermometer is ever accidentally used without a lens filter,
clean the lens as follows:
• Hold the appliance with the probe tip facing down to prevent
liquid from entering the probe tip area. Very gently wipe the surface with a cotton swab or soft cloth moistened with alcohol.
• After cleaning, allow at least 45 minutes drying time before reattaching a new, clean lens filter and taking a temperature.
If the probe tip is damaged, contact Braun.
Use a soft, dry cloth to clean the thermometer display and exterior.
Do not use abrasive cleaners. Never submerge the thermometer in
water or any other liquid.
Store thermometer and lens filters in a dry location free from dust
and contamination and away from direct sunlight. The ambient
temperature at the storage location should remain fairly constant
and within the range of 50 °F to 104 °F (10 °C - 40 °C).
Always keep cleaning solutions and rubbing alcohol away
from children.
Replacing the batteries
The thermometer is supplied with two 3 V lithium batteries
(CR 2032/DL 2032). Insert new batteries when the battery symbol
appears on the display.
Using the tip of a ball-point pen, press the battery door lock to
open the battery compartment. Remove the batteries and replace
with new batteries, making sure the poles are in the right direction.
Slide battery door back in until it snaps in place.
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Error message
No lens filter is attached.
Attach new, clean lens filter
No lens filter is attached
and activation button was
pressed while probe was in
the ear.
Make sure probe tip is clean;
refer to section «Care and cleaning»
if necessary.
Attach new, clean lens filter to stop
error beeps.
Ambient temperature is not
within the allowed operating
range 50 °F to 104 °F
(10 °C - 40 °C) or changing
too rapidly.
Allow the thermometer to remain
in a room for 30 minutes where
the temperature is between
50 °F to 104 °F (10 °C - 40 °C)
Temperature taken is not
within typical human
temperature range (93.2 °F 108 °F / 34 °C - 42.2 °C).
Make sure new, clean lens filter is
attached and thermometer is properly
Then, take a new temperature.
HI = too high
LO = too low
Battery is low, but
Insert new batteries
thermometer will still operate
(No light function on
IRT 3020 models.)
Battery is too low to take
correct temperature
Insert new batteries
System error
Wait 2 minutes until thermometer
powers down, then turn on again.
... reset the thermometer by removing
the batteries and putting them back in.
... call Braun ThermoScan Customer
Service at 1- 800 - 327-7226.
• If error persists
• If error still persists
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Special situations
The Braun ThermoScan thermometer has been shown in clinical
studies to obtain accurate temperatures on persons of all ages.
However, there are certain situations when the ear thermometer
should not be used. These include but may not be limited to the
following situations.
• If there is blood or drainage in the external ear canal.
• For persons who have deformities of the face and ear canal
where the probe of the thermometer cannot be inserted fully into
the ear canal.
• For persons wearing hearing aids or ear plugs, remove the device
and wait 20 minutes prior to taking a temperature.
• Use the untreated ear if prescription ear drops or other ear medications have been placed in the ear canal.
Never attempt to clean inside ears. You could damage the ear drum
or surrounding tissues. You should remove excess ear wax only
when you can reach it with a wash cloth. If you suspect that you or
your child has excess ear wax, consult your physician.
Fever facts
Many persons may not have an elevated temperature even when
they are ill. These include, but are not limited to infants under
90 days of age, persons taking steroids, antibiotics or antipyretics
(acetaminophen, ibuprofen, aspirin), persons with compromised
immune systems, including the elderly or persons with some chronic illnesses. Consult your physician if you feel an illness is present
even if there may not be an elevated temperature.
Fever is described as an elevation of body temperature over an
individual’s «normal» temperature.
An elevated temperature or fever is often viewed as a danger sign.
In fact, a fever can be very beneficial, and helps our immune
system work more effectively. A fever should be evaluated in the
light of other physical symptoms. With the exception of newborn
infants, the presence of fever, without any other symptoms of illness, or in a child who is behaving normally may not be cause for
concern. On the other hand, a physician should be consulted in the
following situations:
- vomiting
- diarrhea
- changes in appetite, activity or breathing, or
- with children who are irritable, lethargic or unusually sleepy.
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Some people, like the elderly, infants under 90 days of age, those
with compromised immune systems, or persons who take steroids,
for example are often unable to build a response to illness or
environmental conditions. These individuals may not have a fever
when they are ill, or their elevated temperature may be lower than
expected for the severity of their illness. Other medications such
as anti-inflammatories and some analgesics may also mask fever.
The presence or absence of fever should rarely be used as the only
measurement of the significance of illness. Your physician should
be contacted whenever there is a question about your family’s
Antipyretics, like acetaminophen or ibuprofen, are usually recommended to relieve the aches and associated symptoms of fever,
not the fever itself. Febrile seizures, or convulsions, which usually
occur in children six months to six years of age, are thought to
occur not because a fever is present, but because of the rate of
rise of the child’s temperature. Call your physician if your child has
a febrile seizure or you desire further information.
Use of the Braun ThermoScan thermometer is not intended
as a substitute for consultation with your physician.
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Product specifications
Displayed temperature range
Operating ambient
temperature range
Display resolution
93.2 °F -108 °F (34 °C - 42.2 °C)
50 °F -104 °F
0.1 °F or °C
(10 °C - 40 °C)
Accuracy for patient temperature range
Maximum Laboratory Error
96.8 °F -102.2 °F (36 °C - 39 °C): ± 0.4 °F
± 0.2 °C
outside this range:
± 0.5 °F
± 0.3 °C
Long term storage ranges
- 4 °F to 122 °F ( - 20 °C to 50 °C)
95 % non-condensing
Battery life:
2 years / 1000 measurements
This infrared thermometer meets requirements established in ASTM
Standard E 1965-98 (for the thermometer system [thermometer with
lens filter]). Full responsibility for the conformance of the product to the
standard is assumed by Braun GmbH, 61476 Kronberg, Germany.
ASTM laboratory accuracy requirements for the thermometer only (not
including a lens filter) in the display range of 98.8 °F to 102.2 °F
(36 °C to 39 °C) for infrared thermometers is ± 0.4 °F (± 0.2 °C), whereas
for mercury-in-glass and electronic thermometers, the requirement per
ASTM Standards E 667-86 and E 1112-86 is ± 0.2 °F ( ± 0.1 °C).
This appliance conforms to the following standards:
DIN EN 60601-1: 3/96 «Medical electrical equipment» –
Part 1: General requirements for safety
DIN EN 12470-5: 2003 «Clinical thermometers» –
Part 5: Performance of infrared ear thermometers
(with maximum device)
Attention, consult
No.601.1 10HK
Internally Powered Equipment
Continuous Operation
Not Protected against Ingress of Water
U.S. Patent No. 5,088,834 Other Patents Pending
MEDICAL ELECTRICAL EQUIPMENT needs special precautions regarding EMC. For
detailed description of EMC requirements please contact the Braun ThermoScan Customer
Service at 1-800-327-7226.
Portable and mobile RF communications equipment can affect MEDICAL ELECTRICAL
In the unlikely event you experience any difficulty using the Braun ThermoScan thermometer,
simply call us toll free at 1-800-327-7226.
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The Braun ThermoScan thermometer has a limited three year
warranty. Should service be required during or after the warranty
period, you must call Braun ThermoScan’s Customer Service
Department at 1-800-327-7226 to obtain a return authorization
number and shipping address. Repackage the thermometer
carefully in its original packaging or securely packed to avoid
damage during shipping. Include the original sales slip indicating
the date of purchase, a note describing the problem, your
authorization number, and your return address. Send the Braun
ThermoScan thermometer prepaid and insured.
Note: Shipping address varies by country.
Answers to any question regarding operation of the Braun
ThermoScan thermometer may be obtained by calling us toll free at:
6:30 AM to 5:00 PM Pacific Time
Limited three year warranty
Braun warrants this product against any defects that are due to
faulty material or workmanship for a period of three years from
the original date of consumer purchase or receipt as a gift. This
warranty applies when used for normal household use in accordance with the Use and Care Manual and excludes the battery and
damage to the product resulting from accident or misuse. This
product is not warranted when used in a professional environment.
In no event shall Braun be liable for any special, incidental, indirect
or consequential damages in connection with the purchase or use
of this product or costs over the original cost of the product.
If the product should become defective within the warranty period,
contact Braun ThermoScan’s Customer Support Department at
1-800-327-7226 for repair or replacement at no charge.
Braun reserves the right to replace a defective product with the
most comparable product currently available. This product has a
five year minimum expected lifetime.
While this warranty gives you specific legal rights, you may also
have other rights which vary from state to state/province to