Welcare WDT-OV100, Instruction Manual

Oral Mode

Note: DO NOT

 eat or drink anything before the measurement, or bite on the product. 

•  To ensure that reading is as accurate as possible, place the thermometric sensor to the left or right  

of the underneath/root of the tongue. Ensure the screen faces upwards.

•  The thermometric sensor must have constant contact with the tissue during the reading and be 

placed under the tongue in one of the two heat pockets at the back. Press the tongue down to  
hold the product in place. 

•  Keep the mouth closed during the 

reading and breathe evenly through 
the nose, while holding onto the 
product to keep it from moving during 
measurement.

•  There are different heat zones in the 

mouth. Generally, the oral temperature 
is 0.3°C to 0.8°C lower than the rectal 
temperature.

Rectal Mode

Note:

 This is the most accurate method from a medical point of view, because it comes closest to 

the core body temperature. 

DO NOT

 attempt rectal measurements on persons with rectal disorders.

•  Lubricate with a water-soluble gel. 

DO NOT

 use petroleum jelly.

•  Gently insert the thermometric sensor no more than 2cm into the rectum. 

DO NOT

 force the 

product into the rectum. Stop insertion and abort the measurement when pain is present. 

Note:

The rectal method is the most accurate method for identifying the basal temperature  

and it is advised to extend the measuring time by 3 minutes after the beep.

Underarm Mode 

(axillary)

Note: 

Wipe off any underarm perspiration and deodorant prior to taking a reading under the arm.  

•  Place the thermometric 

sensor in the centre of the 

armpit. It must be touching 

the skin, remove clothing if 

necessary.

•  Turn the screen so that it 

faces inwards.

•  Hold the product in place by 

slightly applying pressure 

inwards towards the body.

•  The product should be placed at an angle of 35-45 degrees in relation to the arm.
Placing the product in the armpit provides a measurement of surface temperature that can 

fluctuate by around 0.5°C to 1.5°C from rectal temperature readings in adults. 

Note:

 An exact reading cannot be obtained if, the armpits have been allowed to cool. If this is the 

case, we recommend extending the measuring time by around 5 minutes in order to obtain the 
most precise possible reading that corresponds as closely as possible to the core body temperature.

Maintenance

Cleaning

•  Always clean/disinfect the product before and after use to avoid cross contamination. 
•  Only clean with disinfectant (70% medical alcohol) using a damp cloth.
•  Rinse only the thermometric tip under slow running cold water and then dry with a  

clean soft cloth.

•  DO NOT

 use harsh chemical cleaning agents.

•  DO NOT

 immerse the product under water; rinse with hot water over 50°C; soak in alcohol 

for a long period of time; or use ultrasonic washing to clean the product as this can damage 
the electronics.

Storage 

•  Wipe away any dirt and dust from the product.
•  Store the product in it’s protective cover while not in use.

•  DO NOT

 store the product in the protective cover when it is damp. Wipe it off with  

a clean dry soft cloth first.

•  Store in a safe cool dry place, away from children as per Safety Warnings.

•  DO NOT

 place any heavy objects on the product.

Battery

•  When the low battery symbol is shown  

 on the bottom right of the screen the battery 

life is depleted. .

•  Dispose of as per instructions. Non replaceable battery. Battery life is approximately 3 years.

Troubleshooting

Error Code

Problem

Solution

Lo

Lo

Temperature taken is lower 

than 32.0°C(89.6°F)

Turn off, wait one minute and take a new 

temperature.

Hi

Hi

Temperature taken is higher 

than 42.9°C(109.2°F)

Turn off, wait one minute and take a new 

temperature.

Err

Err

The thermometer is not 

functioning properly.

Contact our customer service centre.

Dead battery: battery icon 

is flashing/not completing a 

measurement.

Dispose of the unit as per instructions.

If the problem is not solved by the troubleshooting guide or you have any queries, please 
contact our service centre:
In Australia - 1800 807 464       In New Zealand - 0800 523 583

DO NOT 

attempt to open or repair the product yourself.

Note: 

The product is initially calibrated at the time of manufacture. If this product is used 

according to the instructions, re-calibration should not be required. However, if you feel that  
the product is out of specification, please contact us.

Technical Data

Product Name

Welcare Digital Thermometer (Ovulation)

Model No.

WDT-OV100

Power Type/Rating

Zinc Manganese Alkaline Button Battery (LR41 1.5V DC)

Battery Life

Approx. 200 hours of continuous operation  
or 3 years with 1 measurement per day

Thermometer Type

Maximum (Oral, Rectal & Underarm). Sensing unit = Thermistor.

Measurement Range

32.00 - 42.90°C / 89.60 - 109.20°F

Measurement Scale 
Increments

0.01°C / 0.01°F

Measurement 
Accuracy

±0.20°F(±0.10°C) during 95.90°F~107.60°F (35.50°C~42.00°C) at
64.40°F~82.40°F (18°C~28°C) ambient operating range
±0.40°F (±0.20°C) for other measuring and ambient operating range

Operating Conditions

Temperature: 5 - 40°C

Humidity: 15°C - 95°C RH (non-condensing)

Atmospheric pressure: 700hPa to 1060hPa

Storage/Transport 
Conditions

Temperature: -20 - 55°C

Humidity: 15°C - 95°C RH (non-condensing)

Atmospheric pressure: 700hPa to 1060hPa

Dimensions

13.9cm x 2.2cm x 1.3cm (L x W x H)

Weight

Approx. 12g including battery

IP Rating

IP27
The first digit indicates the level of protection that the enclosure 
provides against access to any hazardous parts and the ingress of 
solid foreign particles.
2 = protection against particles >12.5mm
The second digit indicates the level of protection that the enclosure 
provides against the harmful ingress of water.  
7 = Protected from immersion between 15 cm and 1 m in depth.

Applied Part

 Type BF Equipment  
 – Degree of protection against electric shock

Firmware

Name: DMT-3018
Build: MT18GPCB
Version Number: Z

Materials

ABS + TPE plastic, Stainless Steel, Silica Gel, LCD Screen, Nickel 
Plated Iron Safety Screw

Contents

Welcare Digital Thermometer, Storage Case, Battery (permanently 
installed in product), Instruction Manual and Warranty Card

Your Welcare Digital Thermometer comes with a 1 Year Limited Warranty.  
See the enclosed Warranty Card for further information.
Register your warranty online at www.jadavey.com.au 
For warranty repairs call: 
In Australia - 1800 807 464 

In New Zealand - 0800 523 583

This device complies with the provisions of the EC directive 93/42/EEC (Medical Device 
Directive) and the European Standard EN124703:2000+A1:2009, Clinical thermometers  
- Part 3: Performance of compact electrical thermometers (nonpredictive and predictive)  
with maximum device. 

Important information regarding Electro Magnetic Compatibility (EMC)

Welcare Digital Thermometer manufactured by Joytech Healthcare Co., Ltd conforms to 
EN60601- 1-2:2015 Electro Magnetic Compatibility (EMC) standard. 
Further documentation in accordance with this EMC standard is available at  
www.jadavey.com.au

Disposal

At the end of its life, please treat this product as electronic waste an dispose of 
responsibly according to the current local regulations.

V06/22

Place tip in 

centre of 

armpit.

Raise arm

35˚– 45˚

Lower arm 

to hold 

product in 

place

Face screen 

inwards

Manufactured by:

JOYTECH HEALTHCARE CO., LTD 

No.365, Wuzhou Road, Yuhang Economic Development 

Zone, 311100, Hangzhou, China.

Distributed by:

(Australia)

J A DAVEY PTY LTD

626 Lorimer Street

Port Melbourne, VIC 3207

(New Zealand)

J A DAVEY LTD

C/- Healthcare Logistics

58 Richard Pearse Drive

Mangere, Auckland 2022

Placement points under 

the root of the tongue

Tongue

Root of tongue

Face screen 

upwards