BFH175 - Thermometers BRAUN - Free user manual and instructions

Product Type	Infrared Ear Thermometer
Brand	Braun
Model	BFH175
Measurement Method	Infrared ear
Temperature Range	34.0°C to 42.2°C (93.2°F to 108.0°F)
Accuracy	±0.2°C (0.4°F) over 35.5°C to 42.0°C
Measurement Time	Approximately 1 second
Memory	Last 9 readings
Display	LCD, backlit
Power Source	2 x AAA batteries (included)
Battery Life	Approximately 2 years (with typical use)
Auto-Off	After approximately 1 minute of inactivity
Clinical Accuracy	Clinically tested for precision
Material	ABS plastic, medical-grade
Dimensions	4.1 x 1.8 x 6.0 cm (1.6 x 0.7 x 2.4 inches) (body only)
Weight	Approximately 60 g (2.1 oz) without batteries
Color	White with gray accents
Warranty	2 years limited
Certifications	CE, FDA, ISO 13485
Cleaning Method	Clean with a soft dry cloth; ear probe with alcohol wipe
Storage Conditions	Temperature: 0°C to 50°C, Humidity: 15% to 95% RH
Included Accessories	Protective cap, ear tips (21), user manual, storage case

Frequently Asked Questions - BFH175 BRAUN

How do I switch between Celsius and Fahrenheit?

With the thermometer off, press and hold the power button for 3 seconds until the display shows °F or °C. Release to select.

How do I clean the thermometer?

Use a soft dry cloth to clean the body. For the ear probe, use an alcohol wipe or a cloth lightly moistened with alcohol. Do not immerse in water.

What type of batteries does it use?

It requires two AAA alkaline batteries. They are included with the purchase.

How long does it take to get a reading?

The measurement is completed in approximately 1 second.

Is the Braun BFH175 accurate?

Yes, it is clinically tested to be accurate to ±0.2°C in the range of 35.5°C to 42.0°C.

Can I use it on a newborn?

Yes, it is suitable for all ages, including newborns. Ensure correct probe placement in the ear.

How do I replace the ear probe covers?

Slide a new cover over the probe tip until it clicks. Always use a new cover for each measurement to maintain hygiene.

What does the memory feature do?

It stores the last 9 readings for easy tracking of temperature trends. Press the memory button to recall.

Why does the thermometer show an error?

Common errors: Err (measurement failed) – check probe cover or position; Lo (low battery) – replace batteries.

How do I dispose of the thermometer?

Batteries should be recycled separately. The device contains electronic components; dispose according to local WEEE regulations.

USER MANUAL BFH175 BRAUN

English 1

Spanish 17

Contact Us

Questions or Comments?

Call us toll-free at: 1-800-327-7226

Email: [e-mail]

Visit: www.braunhealthcare.com

Please be sure to specify the model number.

This product is distributed under license to the ‘Braun’ trademark.

'Braun' is a registered trademark of Braun GmbH, Kronberg, Germany.

© 2018 All rights reserved.

Kaz USA, Inc., a Helen of Troy Company

400 Donald Lynch Blvd., Suite 300

Marlborough, MA 01752

Contact Us

1 Protective scanner cap 2 Scanner 3 Battery door 4 LCD screen 5 Temperature button 6 Power button

Thank you for purchasing the Braun Forehead thermometer (BFH175). The Forehead thermometer is a high quality product incorporating the latest technology and tested in accordance with international standards. With its unique technology, the Forehead thermometer can provide a stable, heat-interference-free reading with each measurement. The instrument performs a self-test every time it is switched on to always guarantee the accuracy of measurements.

Please read these instructions carefully before using this product and keep the instructions and the thermometer in a safe place.

Indications for Use

The Braun BFH175 Forehead Thermometer is a non-sterile, reusable, clinical thermometer intended for the intermittent determination of human body temperature in a touch mode using the center of the forehead as the measurement site on people of all ages.

WARNINGS AND PRECAUTIONS

NEVER use the thermometer for purposes other than those it has been intended for. Please follow the general safety precautions when using on children.

NEVER immerse the thermometer into water or other liquids (not waterproof). For cleaning and disinfecting please follow the instructions in the “Care and cleaning” section.

DO NOT store this thermometer in temperature extremes below -25 °C or over 55 °C (below -13 °F or over 131 °F) or in excessive humidity (above 95% non-condensing relative humidity).

If thermometer is stored in a location that is cooler or warmer than where it will be used, allow it to acclimate to the room temperature for 10 minutes before taking the measurement.

DO NOT use the thermometer if there are signs of damage on the scanner or on the thermometer itself. If damaged, DO NOT attempt to repair the product.

NEVER insert a sharp object into the scanner area or any other open surface on the thermometer.

This thermometer consists of high-quality precision parts. DO NOT drop the instrument. Protect it from severe impact and shock. DO NOT twist the instrument or the measuring sensor.

This thermometer is intended for household use only.

Use of this thermometer is not intended as a substitute for consultation with your physician.

Temperature elevation may signal a serious illness, especially in adults who are old, frail, have a weakened immune system, or in neonates and infants. Please seek immediate professional advice when a temperature elevation occurs on persons whom are:

• Neonates and infants under 3 months (Consult your physician immediately if the temperature exceeds 99.4 °F (37.4 °C)
• Individuals over 60 years of age (Fever may be blunted or absent in older individuals)
• Individuals having diabetes mellitus or a weakened immune system (e.g., HIV positive, cancer chemotherapy, chronic immunosuppressant treatment, splenectomy)
• Individuals who are bedridden (e.g., nursing home patient, stroke, chronic illness, surgical recovery, paraplegia, quadriplegia)
• A transplant recipient (e.g., liver, heart, lung, kidney)

It is important to know each individual's normal temperature when they are well. This is the only way to accurately diagnose a fever. Take multiple readings when healthy to determine normal temperature.

This thermometer is not intended for pre-term babies or small-for-gestational-age babies. Pre-term is defined as babies with a calendar age of less than 37 weeks. Small-for-gestational-age is defined as a baby born at 37 weeks or later, with a weight below the 10th percentile for babies of the same gestational age.

This thermometer is not intended to interpret hypothermic temperatures. If the device displays a temperature of 97.5°F (36.4°C) or less with an LED backlight color of green or white, and the individual is exhibiting atypical symptoms or behaviors, contact your physician or health care professional.

DO NOT allow children to take their temperatures unattended.

Please consult your physician if you see symptoms such as unexplained irritability, vomiting, diarrhea, dehydration, changes in appetite or activity, seizure, muscle pain, shivering, stiff neck, pain when urinating, etc., even in the absence of fever.

Even in the absence of fever, those who exhibit a normal temperature may still need to receive medical attention. People who are on antibiotics, analgesics, or antipyretics should not be assessed solely on temperature readings to determine the severity of their illness.

DO NOT modify this equipment without the authorization of the manufacturer.

Why use the Braun Forehead thermometer?

Measurement in less than 2 seconds

The innovative infrared technology allows measurement of forehead temperature in under 2 seconds.

Accurate and reliable

Due to advanced technology, the Forehead thermometer captures the heat naturally given off by the forehead to calculate oral equivalent temperature

Easy to use

The Forehead thermometer poses less risk. A measurement can be taken even while a child is sleeping.

Design is easy to hold and use.

The Forehead thermometer is safer to use on a child than a rectal thermometer and is easier to use than other methods.

Safe and hygienic

Helps minimize spreading of germs.

Completely safe for use on children and adults.

Auto-Display memory

The last reading is automatically displayed for 2 seconds when the unit is switched ON.

How the Braun Forehead thermometer works

The Forehead thermometer measures infrared energy radiated from the skin and surrounding tissue on the center of the forehead. Temperature readings obtained from the center of the forehead will provide the greatest accuracy with this thermometer.

The Forehead thermometer has been clinically tested and proven to be safe and accurate when used in accordance with its operating instruction manual.

Normal temperature is a range. The range of normal also varies from person to person and fluctuates throughout the day. It is therefore important to determine your normal temperature range. A person's normal temperature range tends to decrease with age.

The best way to determine your normal temperature range is to use the thermometer when feeling well. Record readings twice a day (early morning and late afternoon). Take the average of the two temperatures to calculate normal oral equivalent temperature.

A child's normal temperature can be as high as 99.9°F or as low as 97.0°F . Re-measure with a standard digital thermometer for confirmation, especially on infants.

Temperature guidance feature

Temperature guidance helps you to better understand the meaning of your child's temperature with the color indicated on the display. The color-coded screen displays GREEN for a normal temperature, YELLOW for a fever, and RED for a high fever.

Color range	Reading
Green	96.4 - 99.4 °F(35.8 - 37.4 °C)
Yellow	>99.4 - 101.3 °F(>37.4 - 38.5 °C)
Red	>101.3 °F(>38.5 °C)

Temperature taking hints

It is important to know each individual's normal temperature when they are well. This is the only way to accurately diagnose a fever. Take multiple readings when healthy to determine normal temperature. Re-measure with a standard digital thermometer for confirmation. This thermometer displays an oral equivalent temperature reading. Oral readings are approximately 0.9 F (0.5 C) lower than a rectal digital measurement. Individual must be inside for 30 minutes before taking a measurement. Note: Individual and the thermometer should be in the same ambient temperature for at least 10 minutes.

ALWAYS hold the thermometer and the forehead steady when taking a reading. DO NOT move the thermometer until you hear the final beep.

DO NOT take a measurement while or immediately after nursing a baby. Individuals should not drink, eat, or be physically active before/while taking the measurement. Remove hats and wait 10 minutes before taking a measurement. Before taking a measurement, remove dirt or hair from the forehead area. Wait 10 minutes after cleaning before taking measurement.

ALWAYS take the temperature exactly as directed. Temperature results may vary if positioned in the wrong location.

Temperature taking hints (continued)

In the following situations it is recommended that three temperatures in the same location be taken and the highest one taken as the reading:

• Newborn infants in their first 100 days of life.
• Children under three years of age with a compromised immune system and for whom the presence or absence of fever is critical.
• When the user is learning how to use the thermometer for the first time until he/she has familiarized himself/herself with the instrument and obtains consistent readings.

General precautions:

• Remove any sweat prior to measuring with a dry cloth.
• Avoid any cooling or warming cloths on the forehead for at least 30 minutes prior to measuring.

- DO NOT take temperature measurements over scar tissue, open sores, or abrasions.

- Keep the measurement sensor and lens clean. Avoid directly touching the sensor or lens.

- ALWAYS store the thermometer with the protective cap in place to prevent dirt and scratches from damaging the device.

- Make sure to remove the protective cap before taking a measurement and to put the cap back on after using the thermometer.

How to use your Braun Forehead thermometer

First time use

Insert 2 AAA batteries (see “Replacing the batteries” for instructions). Remove 98.6 °F label from display.

1 Remove cap

2 Power on

Press and release the power button once. Backlight will come on and the warm up sequence starts.

3 Ready

When the device displays three dashed lines --- it is ready to take a temperature.

4 Position

Position the thermometer in the center of the forehead, just above and between the eyebrows. Be sure to hold the thermometer flush against the forehead. It is important to hold the thermometer and the forehead steady during measurement. Movement will impact the temperature reading.

If the forehead area is covered with hair, sweat, or dirt, please remove the hair or clean the area, and then wait 10 minutes before taking a temperature measurement. In addition, the thermometer should be in the same ambient temperature as the individual for 10 minutes before taking a temperature measurement.

NOTE: ALWAYS remove the protective cap before taking a temperature reading.

How to use your Braun Forehead thermometer (continued)

5 Take temperature

Press the “Temperature button” and hold thermometer steady on the center of the forehead. Be sure to hold the thermometer flush against the forehead for the duration of the measurement.

When the temperature button is pressed a dashed line animation will appear on the screen. DO NOT remove thermometer from forehead until you hear a long beep indicating normal temperature range or 10 short beeps indicating fever.

6 Read temperature

At the confirmation beep, remove the thermometer from the forehead and read the temperature. The screen will illuminate the appropriate color for the temperature reading. Green for normal temperatures, yellow for fever, and red for high fever.

Go to step 3.

7 To turn off

Press the power button. To conserve battery power, the unit will automatically shut down after 30 seconds of no use.

Memory mode

The Braun Forehead thermometer includes a memory feature to recall the last temperature reading. The last temperature taken is stored in its memory and will be automatically displayed for 2 seconds when it is turned on.

Changing the temperature scale

1 Open battery compartment and remove the batteries.

2 C/F switch is found in the center of the battery compartment.

3 Slide switch to C or F to set preferred temperature scale.

4 Replace the batteries and close the battery door.

5 Device will take measurements in the new temperature scale upon start up.

Calibration

The thermometer is initially calibrated at the time of manufacture. If this thermometer is used according to the use instructions, periodic re-adjustment is not required. If at any time you question the accuracy of temperature measurements, please contact Consumer Relations.

Care and cleaning

To avoid scratching the surface of the scanner, replace the protective cap after each use. The thermometer should be cleaned between uses. Use an alcohol swab or a cotton swab moistened with alcohol (70% Isopropyl) to wipe the thermometer casing and measuring probe for 90 seconds. Wait 10 minutes, allowing the thermometer to air-dry, before taking a measurement. Ensure that no liquid enters the interior of the thermometer. NEVER use abrasive cleaning agents, thinners, or benzene for cleaning, and NEVER immerse the thermometer in water or other cleaning liquids.

Replacing the batteries

The Forehead thermometer comes with 2 AAA batteries.

To install the batteries, slide open the battery door as shown. Insert 2 AAA batteries, correctly positioning with positive “+” and negative “-” as shown. Replace the battery door and close securely.

Replace the batteries when the flashing battery symbol appears on the LCD screen.

Dispose of batteries according to local waste management directions.

Errors and troubleshooting

Error message

Error symbol: during taking measurement

An “Err” sign appears when the temperature measured is BELOW 93.2 °F (34 °C) or ABOVE 109.4 °F (43 °C).

When you receive this symbol, press the power button to reset the thermometer before taking a new measurement.

Errors and troubleshooting (cont.)

Error message	Situation	Solution
	When ambient temperature is too high or too low to take an accurate reading, device will provide an “Err” message. The error message will appear after start up and memory recall.	When you receive this symbol, press the power button to reset the thermometer before taking a new measurement. If the ambient temperature is not within the allowed range of 59°-104°F or 15°-40°C, you will not be able to take a reading.
	Low batteryWhen 20% of battery life is left, the display FLASHES the low battery warning symbol, however, the device can still work until the battery life has 0% left.	See “Replacing the batteries” for instructions.
	Dead battery indicationIf the steady battery icon is the only symbol shown on the display, the device can not work.	See “Replacing the batteries” for instructions.
	Blank displayThermometer does not have power.	Please check if the batteries have been loaded correctly. Also check polarity (<+> and <--> ) of batteries.
	All segements flashingSystem error-self-check display flashes continuously and will not be followed by the ready beep and the ready symbol.If error persists,If error still persists,	Wait 1 minute until the thermometer turns off automatically, then turn on again....reset the thermometer by re-moving the batteries and putting them back in...please contact consumer relations.

You should first read all instructions before attempting to use this product.

A. This 3-year limited warranty applies to repair or replacement of product found to be defective in material or workmanship. This warranty does not apply to damage resulting from commercial, abusive, unreasonable use or supplemental damage. Defects that are the result of normal wear and tear will not be considered manufacturing defects under this warranty. KAZ IS NOT LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY.

Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you also may have other rights which vary from jurisdiction to jurisdiction. This warranty applies only to the original purchaser of this product from the original date of purchase.

B. At its option, Kaz will repair or replace this product if it is found to be defective in material or workmanship.

C. This warranty does not cover damage resulting from any unauthorized attempts to repair or from any use not in accordance with the instruction manual.

Call us toll-free at 1-800-327-7226 or e-mail: [e-mail].

Or visit our website at: www.braunhealthcare.com

Please be sure to specify a model number.

NOTE: IF YOU EXPERIENCE A PROBLEM, PLEASE CONTACT CONSUMER RELATIONS FIRST OR SEE YOUR WARRANTY. DO NOT RETURN THE PRODUCT TO THE ORIGINAL PLACE OF PURCHASE. DO NOT ATTEMPT TO OPEN THE DEVICE HOUSING, DOING SO MAY VOID YOUR WARRANTY AND CAUSE DAMAGE TO THE PRODUCT OR PERSONAL INJURY.

Product specifications

Type: BFH175US Infrared Forehead Thermometer

Measuring range: 93.2°-109.4°F (34°-43°C)

Resolution: 0.1 °F or °C

Accuracy (Laboratory): 0.4 °F for 95 °F – 107.6 °F

(0.2 °C for the range 35 °C - 42 °C)

outside that range ±0.5°F/0.3°C

(Ambient Temperature: 59 °F to 104 °F

(15 °C to 40 °C)

This thermometer displays a

calculated oral equivalent estimate.

Display: Liquid Crystal Display, 4 digits plus special icons

Acoustic:

Audio:

Normal temp range=1 long beep for 0.4 second

duration

Fever: 10 short beeps for 0.2 second duration

Operating temperature: 59°F-104°F (15°C-40°C)

Automatic switch-off: Approximately 30 seconds after last measurement has been taken

Weight: 3.32 oz. (with batteries), 2.52 oz. (without batteries)

Long term storage ranges

Storage/transport temperature: -13 °F to 131 °F (-25 °C to 55 °C)

Humidity: 15–95% non condensing

Battery: (2) AAA Batteries - at least 500 measurements

Pressure:

70kPa-106kPa (0.7atm-1.06atm)

This thermometer is an adjusted mode thermometer that provides an oral equivalent reading.

This infrared thermometer meets requirements established in ASTM Standard E 1965-98 (for the thermometer system). Full responsibility for the conformance of the product to the standard is assumed by Kaz USA, Inc., a Helen of Troy Company, Health & Home, 400 Donald Lynch Blvd., Suite 300, Marlborough, MA 01752

ASTM laboratory accuracy requirements, for the thermometer only in the display range of 96.8 °F to 102.2 °F (36 °C to 39°C) for infrared thermometers is ±0.5 °F (±0.3 °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 device conforms to the following standards:

EN 60601-1:2014 Medical electrical equipment. General requirements for basic safety and essential performance

ISO 80601-2-56:2017 Particular requirements for basic safety and essential performance of clinical thermometers for body temperature measurement

ASTM E1965-98:2016 - Standard Specification for Infrared Thermometers for Intermittent Determination of Patient Temperature

IEC 60601-1-2:2014: Medical electrical equipment – Part 1-2: General requirements for basic safety and essential performance – Collateral Standard: Electromagnetic compatibility – Requirements and tests

NOTE: DO NOT use this device in the presence of electromagnetic or other interference outside the normal range specified in IEC 60601-1-2.

ISO 15223-1:2016: Symbols for use in labeling of medical devices

EN 1041:2008 Information supplied by the manufacturer of medical devices

IEC 60601-1-11:2015 Medical electrical equipment – Part 1-11: General requirements for basic safety and essential performance – Collateral standard: Requirements for medical electrical equipment and medical electrical systems used in the home healthcare environment

Equipment with type BF applied parts. Keep it dry.

Operating temperature. Storage temperature.

See instruction for use.

Internally Powered Equipment.

Continuous Operation.

IP22: Protected against solid foreign objects greater than 12.5 mm in diameter and dripping water when tilted at 15°.

MEDICAL ELECTRICAL EQUIPMENT needs special precautions regarding EMC.

For detailed description of EMC requirements please contact Consumer Relations.

Portable and mobile RF communications equipment can affect MEDICAL ELECTRICAL EQUIPMENT.

Remove the battery from the instrument if it is not required for extended periods of time in order to avoid damage to the thermometer resulting from a leaking battery.

Please do not dispose of the product in the household waste at the end of its useful life.

To protect the environment, dispose of empty batteries at appropriate collection sites according to national or local regulations.

Guidance and manufacturer's declaration - electromagnetic immunity
The BFH175 is intended for use in the electromagnetic environment specified below.The customer or the user of the BFH175 should ensure that it is used in such an environment.
Phenomenon	Basic EMC standard or test method	IMMUNITY TEST LEVELS
		HOME HEALTHCARE ENVIRONMENT
ELECTROSTATIC DISCHARGE	IEC 61000-4-2	+8 kV contact±2 kV, ±4 kV, ±8 kV, ±15 kV air
Radiated RF EM fieldsa)	IEC 61000-4-3	10 V/mf)80 MHz - 2,7 GHzb)80 % AM at 1 kHzc)
Proximity fields from RF wireless communications equipment	IEC 61000-4-3	See RF wireless communication equipment immunity table below
RATED power frequency magnetic fieldsd)e)	IEC 61000-4-8	30 A/mg)50 Hz or 60 Hz
a) The interface between the PATIENT physiological signal simulation, if used, and the ME EQUIPMENT or ME SYSTEM shall be located within 0,1 m of the vertical plane of the uniform field area in one orientation of the ME EQUIPMENT OF ME SYSTEM.b) ME EQUIPMENT and ME SYSTEMS that intentionally receive RF electromagnetic energy for the purpose of their operation shall be tested at the frequency of reception. Testing may be performed at other modulation frequencies identified by the RISK MANAGEMENT PROCESS. This test assesses the BASIC SAFETY and ESSENTIAL PERFORMANCE of an intentional receiver when an ambient signal is in the passband. It is understood that the receiver might not achieve normal reception during the test.c) Testing may be performed at other modulation frequencies identified by the RISK MANAGEMENT PROCESS.d) Applies only to ME EQUIPMENT and ME SYSTEMS with magnetically sensitive components or circuitry.e) During the test, the ME EQUIPMENT OR ME SYSTEM may be powered at any NOMINAL input voltage, but with the same frequency as the test signal (see Table 1).f) Before modulation is applied.g) This test level assumes a minimum distance between the ME EQUIPMENT OR ME SYSTEM and sources of power frequency magnetic field of at least 15 cm. If the RISK ANALYSIS shows that the ME EQUIPMENT OR ME SYSTEM will be used closer than 15 cm to sources of power frequency magnetic field, the IMMUNITY TEST LEVEL shall be adjusted as appropriate for the minimum expected distance.

Guidance and manufacturer's declaration - electromagnetic emissions
The BHF175 equipment is intended for use in the electromagnetic environment specified below. The customer or the user of the BFH175 should ensure that it is used in such an environment.
Emissions Test	Compliance	Electromagnetic environment – guidance
RF EmissionsCISPR 11	Group 1	The ME equipment uses RF energy only for its internal function.Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment.
RF EmissionsCISPR 11	Class B	Complies
Harmonic emissionsIEC 61000-3-2	NotApplicable	The ME equipment issolely battery powered.
Voltage fluctuations/flicker emissions	NotApplicable

Guidance and manufacturer's declaration - RF wireless communication equipment immunity
Test frequency (MHz)	Banda) (MHz)	Servicea)	Modulationb)	Maximum power (W)	Distance (m)	IMMUNITY TEST LEVEL (V/m)
385	380-390	TETRA 400	Pulse\ modulationb) 18 Hz	1,8	0,3	27
450	430-470	GMRS 460, FRS 460	FMc) ± 5 kHz\ deviation 1 kHz sine	2	0,3	28
710	704-787	LTE Band 13, 17	Pulse\ modulationb) 217 Hz	0,2	0,3	9
745
780
810	800-960	GSM 800/900, TETRA 800, iDEN 820, CDMA 850, LTE Band 5	Pulse\ modulationb) 18 Hz	2	0,3	28
870
930
1 720	1 700-1 990	GSM 1800;CDMA 1900; GSM 1900; DECT; LTE Band 1, 3, 4, 25; UMTS	Pulse\ modulationb) 217 Hz	2	0,3	28
1 845
1 970
2 450	2 400-2 570	Bluetooth, WLAN, 802.11 b/g/n, RFID 2450, LTE Band 7	Pulse\ modulationb) 217 Hz	2	0,3	28
5 240	5 100-5 800	WLAN 802.11 a/n	Pulse\ modulationb) 217 Hz	0,2	0,3	9
5 500
5 785
a) For some services, only the uplink frequencies are included.b) The carrier shall be modulated using a 50 % duty cycle square wave signal.c) As an alternative to FM modulation, 50 % pulse modulation at 18 Hz may be used because while it does not represent actual modulation, it would be worst case.

2 Turn on

3 Ready

6 Read the temperature

Memory mode

Low battery

Blank screen