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INSTRUCTION MANUALfor
DIGITAL EAR THERMOMETERREF : CT810 (WITH BUZZER & WATERPROOF)

IDENTIFICATION OF PARTSSwitch

LCD display
Probe window

Main body(Using antibacterial case)
Probe

Fig. 11Warning

PLEASE READ THIS MANUAL IN ANY CASE BEFORE USING.

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PRECAUTIONSThe ear thermometer must be inserted correctly to obtain correct temperature
measurement. Be sure to consult a physician if you feel something is wrong
with you. Do NOT judge only by whether you have a fever or not.
1. Very gently and carefully insert the probe into the ear.
2. Avoid using the ear thermometer if the ear is inflamed.
3. Do NOT use the ear thermometer if the main body is damaged (forexample, the probe window is broken). The continuous use of damaged
unit may cause injury, an improper result or serious danger.
Contact a physician immediately if someone swallows broken pieces.

Caution

1. The body temperature measured in the ear may differ from themeasurement under the armpit or in the mouth or rectum. Therefore, theycannot merely be compared. Take the temperature periodically todetermine the reading with this instrument when body temperature isnormal, then use that as the basis for comparison with any measurement
taken when you suspect a fever.
2. Do NOT use this thermometer for measurements other than bodytemperature. The ear thermometer will be damaged if it is used tomeasure the temperature of bath, refrigerators etc.
3. Do NOT immerse the ear thermometer in Water and do NOT spill chemicalsolvents on the unit.
4. Do NOT drop the ear thermometer and do NOT expose the ear
thermometer to heavy shock. As the ear thermometer is not shockprotected construction.
5. Do NOT bend the ear thermometer.
6. Do NOT disassemble the unit, do not make any modifications and do nottouch the circuitry.
7. Do NOT store the unit under the direct sunlight, NOT at the hightemperature and NOT at a high degree of humidity or dust.

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8. Do NOT boil the probe.
9. Do NOT use the ear thermometer if it operates irregularly or showssings of malfunction.
10.Do NOT use thinner or benzene for cleaning the ear thermometer.
11.When using the ear thermometer after storage at low temperature,
place it in a warm place for 5 to 10 minutes before use.
12.Keep the ear thermometer out of reach the children.
13.Wipe the ear thermometer clean before storing.

About Ear Thermometers
All objects radiate heat. To measure body temperature, this ear
thermometer uses an infrared sensor incorporated in its probe to detect
the heat radiated from the eardrum and its periphery. In general the ear
canal (external auditory canal) of an infant is relatively straight. As wegrow older, it takes on some curvature, as shown in Fig. 2. It is importantto point the probe window of the ear thermometer toward the eardrum
and its periphery inside the ear. To straighten the ear canal, gently pullon the outer ear in the direction of the rear of the head, as shown in
Fig. 3. Each ear canal has a slightly different shape. Be sure to check it
before measurement. And then insert the prove straight, as shown in
Fig. 4.

Fig. 2

Fig. 3Fig. 43

Caution

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1. A person’s left and right ear canals are not necessarily
symmetrical. This may cause different measurement results.
Always take temperature in the same ear.
2. A soiled probe window will result in inaccurate measurement. Besure to check that the probe is clean before use.
3. Body temperature rises after vigorous exercise, a bath or shower,or eating. Wait at least 30 minutes before measuring temperature.
4. Do NOT use the ear thermometer when the ear canal is wet (afterswimming, bathing, etc.).
5. Let the ear thermometer stand at room temperature for a whilebefore use.
6. It is important to know your normal temperature to compare
measurement result.

HOW TO OPERATE / MEMORY FUNCTION
1. Confirm that the probe window is clean.
2. Pressing the switch generates a short beep. Confirm that the display
shows all indicators lit (Fig. 5), the previous measurement result (forapprox. 1 second, Fig. 6), then the “Start measurement message”
will be displayed (as Fig. 7).

Fig. 5

Fig. 6

3. Hold the outer ear and gently pull it toward therear of the head to straighten the ear canal (Fig.
3 and 4)
4. Hold the ear thermometer as shown in theillustration (Fig. 8).
Point the probe window toward the inside ofthe ear. Insert the probe VERY GENTLY andSLOWLY into the ear canal.

4Fig. 7Fig.8

If the ambient temperature is 35 ˚C or higher:
To prevent the ear thermometer from measuring the ambient
temperature, make sure that the power is turned off, then hold the switch
pressed for at least 3 seconds. Still holding the switch pressed, insert theprobe into the ear, then release the switch.

Caution
1. Small children must not operate this instrument, and it must be kept
out of their reach. Be sure that body temperature is measured byan adult.
2. The person whose temperature is to be taken must not movehis/her head while the probe is being inserted into the ear.
3. Once a measurement is taken, the temperature in the ear isaffected. Therefore, wait at least 1 minute before taking next
measurement.

AUTO POWER OFF FUNCTION
If this unit is left on after measurement, an Automatic Power-OFF
Function turns the power OFF after approximately 1 minutes.

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5. The measurement time is approximately 2 seconds. A short, double
beep tells you that measurement is completed. The measurement
result will flash on the display if the ambient (room) temperature is35 ˚C or higher which means the measurement is not completed. Insuch a case, take the following steps to measure again.
6. Press the switch, and turn the power off.

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BATTERY REPLACEMENT
1. Replace with new battery if the battery indicator ()lights up when the switch is pressed.
2. Use a Phillips screwdriver to remove the screw.
3. Use a coin to rotate the battery cover in the direction of the arrow, thenremove the cover. (Fig. 9)
4. Remove the old battery, and replace it with a new one. (Fig. 10)
5. Reinstall the battery cover, and retighten the screw. (Fig. 11)

Fig. 9Fig. 10

Fig. 11(Be sure to orient the battery correctly)

Caution

1. Remove then reinstall the battery if an error message is displayed,
the display is abnormal, or nothing is displayed when the switch is pressed
after battery replacement.
2. To protect the environment, dispose of the used battery according to local
regulations.
3. Remove the battery if the ear thermometer will not be used for a long time.

AFTER USE AND STORAGE- After use, clean the probe and probe window with cotton soaked inalcohol or wet tissue available on the market, then wipe with a dry cloth.
- Storing the ear thermometer at 5 to 35 ˚C allows you to measuretemperature at any time. Storing the ear thermometer below or above
this temperature range above may cause it to display Error 4. In sucha case, leave the ear thermometer at 5 to 35 ˚C for 10 minutes before
measurement.

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- Do not store the ear thermometer where it will be exposed to moisture,
direct sunlight, high temperature or high humidity, or excessive dust.

Do NOT store the ear thermometer soiled or moist. If the ear
thermometer is soiled, take the following steps to clean it.
1. Use a soft sponge soaked in neutral detergent to lightly wipe dirt off
the probe and probe window.
2. Rinse the ear thermometer in standing lukewarm water for less than
20 seconds to remove dirt and detergent.
3. Be sure to carefully dry the ear thermometer with a soft cloth.
- Avoid using the ear thermometer for measurement immediately afterwashing. Wait at least 5 minutes before use.
- Do NOT rinse the ear thermometer directly under strong water flowfrom a faucet.
- Do NOT use a toothbrush, scouring sponge or pad, steel wool,cleanser, etc. to clean this instrument.

DESCRIPTION OF DISPLAY MARK
Error 1 This message will be displayed if the thermometer fails to makestable measurement of body temperature within 30 seconds.
Insert the probe into the ear promptly after pressing the switch.
Error 2 This message will be displayed if the switch is pressedwith the thermometer in the ear. Be sure to press theswitch and confirm that “Fig. 7 ()” is displayed, theninsert the probe into the ear for measurement.
Error 3 This message will be displayed if the temperature
measured is above 42 ˚C. The thermometer may havemeasured the temperature of a nearby heat source. Avoid
external heat sources and try again.

Error 4 This message will be displayed if the ambient temperature
is out of the measurement range (below 5 ˚C or above
40 ˚C). Move to a place within the proper temperature
range (from 5 to 40 ˚C) end let the thermometer stand forat least 10 minutes before measuring again.

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CLEANING

Replace with new battery if the low-battery-power
Low
battery indicator lights up nothing is displayed when the switch ispower pressed.

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Questions and Answers
Q1: Why is temperature measured in the ear different from themeasurement result under the armpit or in the mouth or
rectum?
A1: Temperatures at different parts of body may differ. Compare themeasurement in question with normal temperature previously takenin the same ear.
Q2: Temperature differs each time I measure. Why? What can I do?
A2: Your method for straightening the ear canal may be inconsistent, theway you insert the probe may be not consistent, or you are perhaps
taking a second measurement too soon. Pull the outer ear rearward
to straighten ear canal, then very gently insert the probe into theear canal for measurement. Once a measurement is taken, thetemperature in the ear is affected. Therefore, wait at least 1 minute
before taking another measurement.
Q3: Can I measure temperature without the probe cover?
A3: This instrument is designed to measure temperature without theprobe cover. Do NOT attach the probe cover or any film or covering.
Q4: Is it hygienically all right to use the ear thermometer without
the probe cover?
A4: The body of the ear thermometer is made of antibacterial plastics,
and it can be washed. Therefore, the ear thermometer can be usedvery hygienically without the probe cover.
Q5: Can I use the ear thermometer in cold/hot places?
A5: This instrument can be used in room temperature from 5 to40 ˚C (Humidity at 15 to 95 %). An error message (“Er”) may bedisplayed if the temperature during storage greatly differs from thatof the room temperature where you take a measurement. In such acase, let the ear thermometer stand for a while at room temperature
before measurement.

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SPECIFICATIONS
Measuring RageAccuracy: 32.0 ˚C ~ 42.0 ˚C: ±0.1 ˚C (36.0 ˚C T 39.0 ˚C)[Measuring Temperature at 23.0 ˚C]±0.2 ˚C (T < 36.0 ˚C, T > 39.0 ˚C)[Measuring Temperature at 23.0 ˚C]
Display: 3 digits with decimal point:Battery weak mark, MR:Memory mark, ˚C:˚C indicator
Battery: DC 1.5 V(Alkaline Button Battery A76/LR44 or equivalent × 1 pcs.)
Battery Life.
: Approx. 3,000 continuous measurement (at 23.0 ˚C by LR44)
Working temp. & humidity : +5 ˚C ~ 40 ˚C, 15 % ~ 95 %Storage temp. & humidity : −20 ˚C ~ 50 ˚C, 15 % ~ 95 %Unit Size: 131 (L) × 37 (W) × 25 (H) mm
Weight: Approx. 45 g (including battery)
Electric shock protection : Type B equipment
Memory: One memory recall function.

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Q6: Can I use the ear thermometer on an infant? Their ear canals
are pretty small.
A6: Yes. Do NOT attempt to force the probe into the ear canal. Insert theprobe into the ear canal much as you would an ear plug.
Q7: Can I use the ear thermometer to measure temperature underthe armpit or in the mouth?
A7: No. This instrument is designed to measure temperature only in theear.
Q8: Can I use the ear thermometer on animals?
A8: No. This instrument is designed to measure temperature in the earsof humans.