Handleiding Citizen CTD 710 Thermometer

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When the “ ” symbol appears, replace the battery as soon as

possible.

When the “

” symbol appears, measurements are no longer

possible. Replace the battery.

(1) Open the battery cap.

Turn over the device and press the battery cap upwards to open the

battery compartment. (Figure 10)

* If it is difficult to open, insert a pointed (non-metallic) object in the

hole between the battery cap and the probe to push it open.

(2) Use the pointed (non-metallic) object to remove the battery.

(Figure 11)

(3) Hold the new battery (CR2032) at an angle to insert it under the

hook and press it in until it clicks into place.

Make sure that the plus pole of the battery faces upwards. (Figure 12)

(4) Close the battery cap.

* Be sure to dispose of used batteries as soon as possible and in a

location out of reach of children.

Hole

Figure 10 Figure 11 Figure 12

• After use, wipe clean the device, the probe and probe tip using tissue or

wet tissue. Use a dry cloth to dry it to prevent staining and place the

probe cap before storing it. Any dirt in the probe tip that is left as is will

prevent you from obtaining accurate measurements. Damage may

result.

• Do not submerge the device in disinfectant or other cleaning agent.

[Damage may result]

• Thinner, petrol, benzine must not be used as they will damage the

device.

• Do not clean using an ultrasonic cleaning device. [Damage may result]

• This device is not water-proof. Do not immerse it in water or clean it in

tap water.

• Do not bend, drop or expose it to strong impact.

• Do not store the device without removing accumulated dirt or moisture.

[Damage may result]

• Store the device and probe cap in a location inaccessible to children.

• Do not store the device in a location that does not meet storage

environment requirements. [Damage may result]

* For reference: (ambient temperature: -20 to 50°C, relative humidity:

85% RH or less)

• Do not store the device in a location exposed to water, direct sunlight,

high temperature, high humidity or a location that is excessively dusty.

• Do not store it in a location near open fire or locations that are exposed

to vibration or impact (this includes during transportation).

• Do not store it in a location where chemicals are also stored or where

gas is generated.

Clock function

Date and time can be set. When set, the measurement value and date

and time of measurement are stored.

Setting method:

(1) Press the Power ON/MEMORY switch and the buzzer beeps to

indicate the power is on.

(2) Hold down the Power ON/MEMORY switch for about

3 seconds and the SET symbol will start to blink on

the LCD screen indicating it has entered the time

setting mode.

(Figure 6)

(3) Press the SCAN button and the 24 symbol will start to blink

indicating you can select between the 12-hour and

24-hour clock.

Press the SCAN button to select “PM” (12-hour clock) or

“24” (24-hour clock). (Figure 7)

* The PM symbol is not displayed between 0 AM and 11

o’clock.

(4) Press the Power ON/MEMORY switch to set “hour → min → year →

month → day” in indicated order.

When the respective symbol on the LCD screen starts to blink during

settings, use the SCAN button to select and the Power ON/MEMORY

switch to determine. Then the next symbol will start to blink, repeat

operation in step (4).

Surface temperature measurement mode

This device can be used to measure the surface temperature of liquid

or solid object.

(Example: water, milk, etc.)

Operation description:

(1) Before making a measurement, make sure the probe tip is clean

and not damaged.

(2) When the power is on, press the MODE switch twice

to enter the surface temperature measurement

mode.

“

” (the surface temperature measurement symbol)

appears. (Figure 8)

(3) Press the SCAN button and the surface temperature of the object

will appear in about 1 second.

Each time the SCAN button is pressed, a new measurement is made. If

the temperature of the object being measured changes, the value on

the LCD screen also changes. While holding down SCAN button, the

measured value keeps changing.

(4) Hold the device 1 or 2 cm from the object whose temperature you

want to measure to obtain an accurate measurement.

* Temperatures measured in surface temperature measurement mode

indicate the surface temperature of an object. The surface temperature

measurement mode cannot be used for measuring body temperature.

Room temperature measurement mode

Indicates atmospheric temperature or the temperature of a room.

(changes in real time)

Operation description:

(1) Let the device acclimatize to room temperature for 15 minutes

before use.

(2) When the power is on, press the MODE switch three

times to enter the room temperature measurement

mode.

“

” (the room temperature measurement symbol) and

the room temperature appear on the LCD screen.

(Figure 9)

(3) To check room temperature, place the device in the room on a

table or desk not exposed to direct sunlight, the down draft from

an air conditioner or other location subject to temperature

fluctuations.

Figure 6

Figure 7

Figure 8

Figure 9

When measurements cannot be made

If you suspect that the device is not functioning properly, first perform the following

inspections. If the device is not operating normally after these inspections, please

contact your local distributor.

Symptom Check point/State Remedy

Nothing

happens when

buttons are

pressed.

Check if the battery is correctly installed.

Refer to “Replacing the battery

and battery precautions” to

correctly install the battery.

Check if the battery is depleted. Install a fresh battery. (CR2032)

The device is not ready.

Wait about 7 seconds for the

symbols on the LCD screen to

stop blinking.

Ambient temperature is outside normal

temperature range of 10 to 40°C.

Leave the device for 15 minutes

in an environment that meets its

temperature requirements.

The device is not operating normally.

Remove the battery for 1 min,

reinstall it and try again.

If the error persists, contact your

local distributor.

1 The measured value is higher than 42.2°C in

ear/forehead measurement mode

2 The measured value is higher than 80°C in

surface temperature measurement mode

If the error persists when it is

clear that the temperature of the

measured surface is within the

measurement range, contact

your local distributor.

1 The measured value is lower than 34.0°C in

ear/forehead measurement mode

2 The measured value is lower than -22°C in

surface temperature measurement mode

Measurements do not start after turning on

the device.

Remove the battery and then

reinstall it.

Model number CTD710

Temperature detection

method

Infrared

Region whose

temperature is detected

Inside the ear, forehead

Rating and power supply

DC 3 V

( : direct current), CR2032 × 1 pc.

Power consumption 18 mW

Battery life Approx. 3,000 times

Temperature indication Numeric 3 digits + °C, units of indication 0.1°C

Temperature indication

method

Temperature correction method

Measurement range Ear and forehead measurement mode: 34.0 to 42.2°C

Surface temperature measurement mode: -22 to 80°C

Room temperature measurement mode: 10 to 40°C

Maximum permissible

error

Ear and forehead measurement mode: ±0.2°C within 35.0 to 42.0°C

±0.3°C for other than above measurement range

Surface temperature measurement mode: ±0.3°C within 22 to 42.2°C

±4% or ±2°C whichever is larger

(other than above measurement range)

Room temperature measurement mode: ±1°C

* When blackbody furnace is used at a room temperature of 23°C

Weight Approx. 63 g (including battery)

Dimensions Approx. 45 (W) x 106 (H) x 61.2 (D) mm

Additional functions Memory for 9 measurements, power auto off

Electric shock protection

Internal power supply

( : BF type applied part)

IP protection class IP22

Operating environment Ambient temperature: Ear: 10 to 40°C / forehead: 15 to 40°C

Relative humidity: 85% RH or less

Storage conditions Ambient temperature: –20 to 50°C

Relative humidity: 85% RH or less

Accessories Monitor battery (internal), instruction manual, EMC technical data,

Probe cap

Specifications

* This device and old batteries removed from it must be disposed of in accordance with the rules

and regulations of your local community.

* CITIZEN SYSTEMS JAPAN Co., Ltd. accepts no liability whatsoever for damages resulting from usage

not specified in the instruction manual and repairs, modifications, adjustments, etc. not performed

by the manufacturer.

* This device complies with EMC standard IEC 60601-1-2: 2014.

* This device is subject to change without notice due to improvements.

Other Functions Replacing the battery and precaution

Maintenance and Storage Methods

Forehead and ear thermometer Q & A

This differs from armpit temperature! Which temperature is correct?

Since body temperature measured in the ear and the forehead are

measured in regions that differ from the armpit, the detected temperature

results may sometimes also differ. Instead of making simple comparisons,

make regular measurements under controlled conditions to compare with

measurement results obtained under normal conditions.

The forehead measurement mode uses an algorithm to calculate obtained

data.

In the following cases, the temperature of the forehead will be impacted

and it may not be possible to calculate a correct body temperature.

- When measurements are made in a location near an air conditioner or

other location exposed to air movement

- When the forehead is exposed to direct sunlight

- When the forehead is wet with sweat

- During a 30-minute period after exercise or taking a bath

- When the person whose temperature is measured has been in a location

with a different temperature prior to measurement

- When the device used to make the measurements was kept in a location

with a different temperature prior to measurement

- When a strand of hair, cosmetics or other object between the forehead

and the probe tip interferes with the measurement.

- When the forehead was covered by a cap just prior to measurement

The temperature differs from each new measurement. Why?

If the temperature reading changes each time, the following are likely

causes. Check and measure again.

1) A consistent method for straightening the ear canal is not being used.

There are individual differences, but a normal ear canal is not straight.

Accurate temperature measurements make it essential to straighten the

ear canal and pointing the probe tip straight at the eardrum. Refer to the

section “How to measure correctly in the ear measurement mode” in the

instruction manual (front cover).

2) A consistent method for inserting the probe in the ear canal is not being

used.

To ensure stable temperature detection, insert the probe in the ear canal

gently. When inserting the probe into the ear canal, keep it pointed in

the same direction and at the same depth or the measurement results

may be inaccurate.

3) Repeated measurements are performed in a short time.

When the probe is inserted into the ear canal, the temperature inside the

ear may start to be affected. To make another measurement, wait at least

1 minute.

Why does a temperature reading from the right ear differ from a

reading from the left ear?

Although body temperature does not basically change, the internal

anatomy of the right and left ear is not the same. For this reason, the

measurement results will differ slightly between individuals. To measure

body temperature, measurements should use the same ear.

Can measurements be performed without a probe cover?

This device has been designed so that accurate measurements can be

performed without a probe cover. In addition, if a probe cover of another

device is attached, accurate measurements will not be possible and should

not be used.

There is no probe cover. Is it hygienic to use the device without a

probe cover?

The probe can be hygienically used as long as the tip is kept clean. Refer to

the instructions in “Maintenance and Storage Methods.”

This device is very economical because it does not need a probe cover.

When used on yourself, is it necessary to be concerned about the

probe becoming dirty?

When the probe tip becomes dirty, you will not obtain accurate

measurements. Even if you use it only on yourself, you still have to check it

for dirt build-up. And after use you have to remove dirt from the probe and

probe tip and dry it completely after cleaning.

Can you take temperature measurements using an ear affected by an

inflammation?

Do not use the thermometer in an ear affected by otitis externa, tympanitis

or other disease. Using it could spread the infection to other people and

aggravate the symptoms of the patient.

Can babies with narrow ear canals be measured?

The probe need not be fully inserted to enable a measurement. Straighten

the ear canal, align the center of the probe with the center of the ear canal

and point it towards the eardrum. There is no need to force the probe into

the ear canal.

Can you use a forehead and ear thermometer to take measurements

under the armpit or under the tongue?

A forehead and ear thermometer cannot be used to measure the

temperature under the armpit or tongue. This device consists of a probe

with a built-in infrared sensor that measures body temperature by

detecting the heat radiated inside the ear (eardrum and the external

auditory canal) and by the forehead.

CTD710-LA_IM_1902LA_EN.indd 2 2019/08/09 15:02

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