ThermoPro TP420 Two-in-One Instant Infrared & Probe Thermometer User Manual

Cook Like a Pro!

Introduction

Thank you for purchasing this Two-in-One Instant Infrared and Probe Thermometer. This two-in-one device lets you measure surface temperatures conveniently and accurately from a distance via infrared without the need of any direct contact, and also measure internal temperature of food by inserting the probe into food to check whether the food is ready for serving.

Components

The package includes:

  • 1 x Two-in-One Instant Infrared and Probe Thermometer
  • 2 x AAA Batteries
  • 1 x User Manual

The thermometer features the following components:

  • 1. Infrared Sensor
  • 2. Low Battery Indicator
  • 3. Surface Temperature Measured via Infrared Sensor display area
  • 4. MAX/MIN/AVG Temperature display area
  • 5. Probe Temperature display area
  • 6. [SCAN] Button: Press to turn on the device. Press to scan and measure the temperature via infrared when the thermometer is ON.
  • 7. [MODE] Button: Press to cycle through MAX/MIN/AVG temperature readings. Press and hold for 3 seconds to enter the emissivity adjustment mode.
  • 8. [°C/°F] Button: Press and hold for 3 seconds to select between °C and °F. When adjusting emissivity, press this button to lower the emissivity.
  • 9. [Backlight] Button: Press to turn on/off the backlight. When adjusting emissivity, press this button to increase the emissivity.
  • 10. Food Grade Stainless Steel Probe
  • 11. Battery Compartment
  • 12. Hanging Hole

Specifications

Feature Specification
Infrared Temperature Range -58 to 1022°F (-50 to 550°C)
Infrared Tolerance ±3°F (±1.5°C) from 14 to 212°F (-10 to 100°C), otherwise ±2%
Response Time 500ms (2-3 seconds)
Infrared Sensor Type Thermopile Sensor
Distance-Spot Ratio 12:1
Probe Temperature Range -58 to 572°F (-50 to 300°C)
Probe Tolerance ±1.8°F (±1.0°C) from 32 to 212°F (0 to 100°C), otherwise ±1.5%
Probe Sensor Type NTC
Probe Material 304 Stainless Steel, 4+ inches (107mm)
Display LCD: 1.1" Length x 1.1" Width inches (37 L x 27 W mm)
Backlight Yes (Y)
Unit Size 6" Length x 1" Width x 1" Height inches (167 L x 41 W x 25 H mm)
Power 3.0V (2 x AAA batteries)

* Response Time defined as the time it takes for thermometers to read from ambient temperature (77°F or 25°C) to within 1.8°F (1°C) of final temperature of an object (150°F or 65°C). 150°F (65°C) is the recommended minimum temperature for many types of meat.

Installing/Replacing Batteries

Low Battery Indication will appear on the screen when the batteries are running low.

  1. Open the Battery Compartment and remove the used batteries. Dispose of the used batteries properly.
  2. Insert two new AAA batteries with the correct polarity.
  3. Close the Battery Compartment.

How to Measure Temperature via Infrared

  1. Once the batteries are properly installed, press the [SCAN] button to turn on the thermometer.
  2. Press and hold the [°C/°F] button to select between °C and °F.
  3. Press and hold the [MODE] button to enter the emissivity adjustment mode. Press the [+] and [-] buttons to increase/decrease the emissivity. See the Emissivity Data Table for suggested emissivity values.
  4. Point the thermometer towards the surface of the object you wish to measure.
  5. Press the [SCAN] button once to take the temperature on the surface you're pointing to; the temperature will be shown on the upper part of the display.
  6. Press and hold the [SCAN] button if you wish to continually take a measurement of the surface. Press the [MODE] button to view the maximum, minimum, and average temperatures measured during this session.
  7. The last-measured temperature and MAX/MIN/AVERAGE temperatures will remain on the display when you turn the thermometer on next time.

NOTE:

  • The thermometer cannot measure the temperature of objects behind glass. Inaccuracy may also occur when exposed to steam, dust, or other contaminants in the air.
  • The thermometer only measures the surface temperature via infrared. For internal temperature measurements (e.g., meat, food), use the probe as described below.

How to Measure the Food/Meat Internal Temperature via Probe

  1. Press the [SCAN] button to turn on the thermometer.
  2. Pull out the probe; the temperature measured by the probe will show on the bottom part of the display.
  3. Insert the probe into the meat; the internal temperature will show after a few seconds.
  4. If the probe is retracted, the probe temperature will display "---".

Auto-off Feature

If no button is pressed and the probe is not being used to measure temperature, the thermometer will turn off automatically in 90 seconds.

Distance-Spot Ratio

The thermometer measures surface temperature based on the distance to spot diameter ratio (D:S). As the distance between the thermometer and the surface increases, the total surface area measured also increases. For example, with a distance to spot ratio of 12:1, the surface area measured has a diameter of roughly 1/12 of the distance. For the most accurate results, ensure the target has a surface area of twice the corresponding spot diameter. Insufficient surface area will result in inaccuracies. For example, if you use a device with a D:S ratio of 12:1 to measure an area with a 1-inch (25.4mm) diameter, the recommended distance to hold the thermometer from the surface is 6 inches (152mm) or shorter.

Diagram Description: The illustration shows a thermometer emitting a cone of measurement. It indicates that for a 12:1 ratio, at a distance D, the spot size S has a diameter. Examples shown are: at 12 inches distance, the spot is 1 inch diameter; at 18 inches distance, the spot is 1.5 inches diameter.

Emissivity

Emissivity is a material's efficiency in emitting thermal energy. Non-reflective surfaces have higher emissivity (closer to 1) than reflective surfaces (closer to 0). Inaccurate results may occur when measuring reflective surfaces like glass, polished wood, and granite.

To achieve accurate temperature measurements of reflective surfaces with low emissivity, place a strip of masking tape over the surface and allow it to adjust to the surface temperature for approximately 30 minutes. Measure the surface by scanning the taped section to eliminate inaccuracy.

The emissivity of most organic materials and painted objects is 0.95. The default emissivity of this device is 0.95, so modification is usually not needed. For improved measurement accuracy on different objects, refer to the emissivity data table below.

Objects Emissivity Objects Emissivity
Aluminum0.30Iron0.70
Asbestos0.95Lead0.50
Asphalt0.95Limestone0.98
Basalt0.70Oil0.94
Brass0.50Paint0.93
Brick0.90Paper0.95
Carbon0.85Plastic0.95
Ceramics0.95Rubber0.95
Concrete0.95Sand0.90
Copper0.95Stone0.70
Sludge0.94Snow0.90
Frozen Food0.90Steel0.80
Hot Food0.93Fabric0.94
Glass0.85Water0.93
Ice0.98Wood0.94

Safe Use & Care

  • DO NOT point at any person or animal.
  • DO NOT attempt to point at an aircraft.
  • DO NOT allow children to operate the device.
  • Use two 1.5V AAA batteries when replacing batteries.
  • Ensure batteries are inserted with the correct polarities.
  • ALWAYS remove batteries when cleaning the device.
  • DO NOT use leaking batteries or dispose of old batteries in fire.
  • Remove batteries if storing the device for a prolonged period.
  • DO NOT disassemble the device or tamper with internal components; doing so will void any warranty.
  • DO NOT touch the lens or wipe it using anything other than a soft cloth or cotton swab.
  • Keep the thermometer away from electromagnetic fields produced by objects such as arc welders and induction heaters.

Important Usage Notes:

  • DO NOT expose the thermometer to direct sources of heat for extended periods.
  • The thermometer measures surface temperature, not internal temperature.
  • Do not use it as a reliable source to measure body temperatures.

CAUTION

LASER RADIATION - DO NOT STARE INTO BEAM

Wavelength: 650nm±10nm

Maximum output power: <1mW

CLASS II LASER PRODUCT

The maximum output power emitted through the laser aperture is 85uW.

Caution: Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Disposal

You can help protect the environment! Please remember to respect local regulations. Hand in non-working electrical equipment to an appropriate waste disposal center.

[Recycling Symbol Description]

EC Conformity

[CE Logo Description] Hereby, the manufacturer declares that this product complies with the basic requirements and applicable regulations of the Radio Equipment Directive 2014/53/EU and the EMC Directive 2014/30/EU. The complete declaration of conformity can be found at: https://buythermopro.com/eu-declaration-of-conformity/.

Limited One-Year Warranty

ThermoPro warrants this product to be free of defects in parts, materials, and workmanship for a period of one year from the date of purchase. Should any repairs or servicing under this warranty be required, contact Customer Service for instructions on how to pack and ship the product to ThermoPro. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Customer Service

Call or Text: 1-877-515-7797 (USA & Canada only) or 44-808-164-1683 (UK).

Email: service@buythermopro.com

Hours: Weekdays 8:00 AM - 8:00 PM EST (USA & Canada only); Weekdays 1:00 PM - 12:00 AM CET (UK).

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