NJTY Infrared Thermometer Instruction Manual

1. Introducció

This infrared thermometer is designed for measuring the surface temperature of various objects. It provides a safe and quick method for temperature measurement, especially for hot, hazardous, or hard-to-reach surfaces, without requiring direct contact. The device offers features such as rapid response, laser positioning, audio-visual alerts, and switchable temperature units (Celsius/Fahrenheit).

Hand holding an orange and black infrared thermometer, displaying 21.1 degrees Celsius. Text overlays highlight features like 0.5-second rapid response, laser positioning, audio-visual alert with backlight, switchable Celsius/Fahrenheit, AAA batteries, and low voltage indicació. — Figure 1: NJTY Infrared Thermometer in use, highlighting key features.

2. Advertències i precaucions de seguretat

2.1. Avisos

To prevent potential harm or damage, please observe the following:

Before each use, carefully inspect the plastic housing. Do not use the unit if there is any visible damage.
Never point the laser directly at eyes or indirectly off reflective surfaces.
Do not use this unit in environments containing explosive gas, steam, or dust.

2.2. Precaucions

To prevent damage to the unit or the target, protect it from the following situations:

Avoid strong electromagnetic fields (EMF) from sources like arc welders or induction heaters.
If the unit experiences a large or abrupt ambient temperature change (thermal shock), allow 30 minutes for the unit to stabilize before use to ensure accurate readings.
Do not leave the unit on or near objects of excessively high temperature.

3. Configuració

3.1. Component Overview

Diagram showing the components of the infrared thermometer: Temperature sensing area, Infrared laser point, Laser point switch, Measurement trigger, Display screen, Backlight button, Celsius/Fahrenheit Switch button, and Battery lock latch. — Figure 2: Key components of the NJTY Infrared Thermometer.

3.2. Instal·lació de la bateria

The thermometer requires two 1.5V AAA batteries (not included by default).

Locate the battery compartment at the bottom of the handle.
Open the battery compartment by rotating the switch knob with a screwdriver to the 'OPEN' position.
Insert two 1.5V AAA batteries, ensuring correct polarity.
Close the battery compartment by rotating the switch knob to the 'LOCK' position.

Image showing the battery compartment of the infrared thermometer open, with two AAA batteries inserted. The compartment is labeled 'Battery compartment' and has 'LOCK' and 'OPEN' indicators. — Figure 3: Battery installation in the thermometer.

4. Funcionament

4.1. Prendre Mides

The thermometer supports both single and continuous measurement modes.

Mesura única: Pull and release the trigger. The laser point will activate to help aim at the target. The measured temperature will be displayed on the LCD screen. The "HOLD" symbol will appear, indicating the reading is held.
Mesura contínua: Pull and hold the trigger. Slowly move the thermometer across the target area. The device will continuously scan and display the temperature on the LCD. The "SCAN" symbol will appear. The maximum temperature value during continuous measurement will also be displayed.

A hand holding the infrared thermometer, pointing it at a kettle of water to measure its temperature. The display shows 75.2 degrees Celsius. — Figure 4: Measuring water temperature with the infrared thermometer.

4.2. Button Functions and Display Indicators

The device features several buttons for controlling its functions and various indicators on the display:

HOLD (A): Appears when a single measurement is taken and the trigger is released, indicating the current temperature value is held.
SCAN (B): Appears during continuous measurement when the trigger is held, indicating the thermometer is actively scanning.
Laser Point Switch (Button with triangle/laser icon): Press to turn the laser pointer on or off. The laser is for aiming only.
Backlight Button (Lightbulb icon): Press to turn the LCD backlight on or off.
Celsius/Fahrenheit Switch (C/°F button): Press to switch between Celsius and Fahrenheit temperature units.
Emissivity Adjustment (Long press C/°F button): For models with adjustable emissivity (T400A, T600A), long press the C/°F button. The preset emissivity (0.95) will be displayed. Use the laser point switch or backlight button to increase or decrease the value, then press C/°F again to save.
Power (E): Indicació de la capacitat de la bateria.
Temperature Value (G): Mostra la temperatura mesurada actual.
Emissivity Symbol (H): Indicates the current emissivity setting.
Max Symbol (I): Indicates the maximum temperature value.
Max Temperature Value (J): Displays the maximum temperature recorded during continuous measurement.

Two infrared thermometers side-by-side, one displaying Celsius and the other Fahrenheit, demonstrating the switchable measurement feature. — Figure 5: Celsius/Fahrenheit switchable measurement.

4.3. Distance to Spot Size (D:S Ratio)

The accuracy of measurement depends on the distance to the target and the size of the measurement spot. This model has a Distance to Spot (D:S) ratio of 12:1. This means that as the distance (D) from the thermometer to the target surface increases, the diameter of the measurement spot (S) on the target surface also increases.

Per example, at a distance of 300mm (12 inches), the spot diameter is 38mm (1.5 inches).
At 900mm (36 inches), the spot diameter is 75mm (3.0 inches).
At 1500mm (60 inches), the spot diameter is 132mm (5.3 inches).

Scope of Observation: Ensure that the target you are measuring is larger than the measurement area. For accurate readings, the target should ideally be at least twice as large as the measuring spot. If the target is smaller, move the thermometer closer to it.

Diagram illustrating the Distance to Spot Ratio (D:S = 12:1) for the infrared thermometer. It shows how the measurement spot size increases with distance from the target. Examples include spot diameters of 38mm at 300mm distance, 75mm at 900mm, and 132mm at 1500mm. — Figure 6: Distance to Spot Ratio (D:S = 12:1) explanation.

4.4. Emissivity Guide

Different materials have different emissivities, which affects the accuracy of infrared temperature measurement. For models with adjustable emissivity (T400A, T600A), you can set the emissivity value to match the target material for more accurate readings. The default emissivity is 0.95. Below is a general guide for common materials:

Material	Emissivitat	Material	Emissivitat	Material	Emissivitat	Material	Emissivitat
Alumini	0.30	Ferro	0.70	Amiant	0.95	Maó	0.50
Bitumós	0.95	Pedra calcària	0.98	Basalt	0.70	Oli	0.94
Llautó	0.50	Pintar	0.93	Brick (painted)	0.90	Paper	0.95
Carboni	0.85	Plàstic	0.95	Ceràmica	0.95	Cautxú	0.95
formigó	0.95	Sorra	0.90	coure	0.95	Pell	0.98
Fangs de petroli	0.94	Articles congelats	0.90	Neu	0.90	Acer	0.80
Menjar calent	0.93	Tèxtil	0.94	Vidre	0.85	Aigua	0.93
Gel	0.98	Fusta	0.94

5. Manteniment

5.1. Neteja de lents

The lens is the most delicate part of the thermometer. Keep it clean to ensure accuracy.

First, use compressed air to blow away any loose debris or dust from the lens surface.
Gently wipe away any remaining small debris with a camel hair brush.
Finally, carefully wipe the lens surface with a soft, wet cotton cloth.

5.2. Shell Cleaning

To clean the exterior shell of the thermometer:

Use a sponge or a soft cloth dampacabat amb aigua i sabó suau.
Wipe the surface gently and then dry with a clean, soft cloth.
Do not use abrasive cleaners or solvents, as these can damage the plastic housing.

6. Especificacions

The following tables detail the specifications for the T400, T400A, T600, and T600A models. Please note that specifications may vary slightly between models, particularly regarding emissivity.

6.1. T400 and T400A Models

Parameter table for NJTY T400 and T400A infrared thermometers. Includes measuring range (-50 to 400°C / -58 to 752°F), accuracy, emissivity (preset 0.95 for T400, adjustable for T400A), maximum value (N.A. for T400, checkmark for T400A), repeatability, response time (500mSec, 95% response), response wavelength (8-14um), operating temperature (0-50°C), storage humidity (10-90% RH non-condensing), power supply (AAA*2 batteries), magnification ratio (12:01), net weight (approx. 122g), and gross weight (approx. 166g). — Figure 7: Specifications for NJTY T400 and T400A models.

6.2. T600 and T600A Models

Parameter table for NJTY T600 and T600A infrared thermometers. Includes measuring range (-50 to 600°C / -58 to 1112°F), accuracy, emissivity (preset 0.95 for T600, adjustable for T600A), maximum value (N.A. for T600, checkmark for T600A), repeatability, response time (500mSec, 95% response), response wavelength (8-14um), operating temperature (0-50°C), storage humidity (10-90% RH non-condensing), power supply (AAA*2 batteries), magnification ratio (12:01), net weight (approx. 122g), and gross weight (approx. 166g). — Figure 8: Specifications for NJTY T600 and T600A models.

6.3. Dimensions generals

Dimensions of the NJTY T400 infrared thermometer: 78mm width, 145mm height, and 43mm depth at the base. — Figure 9: General dimensions of the thermometer (T400 model shown).

7. Consells d'usuari

No hi havia consells específics per a l'usuari disponibles del servei de clients.viewo preguntes i respostes per a aquest producte.

8. Solució De Problemes

No specific troubleshooting information was available from customer Q&A for this product. If you encounter issues, please refer to the full user manual or contact customer support.

9. Garantia i Suport

Per obtenir informació detallada sobre la garantia i més assistència, consulteu la documentació oficial del producte. Podeu descarregar un manual d'usuari complet en format PDF:

Descarrega el manual d'usuari (PDF)

	Manual d'instruccions del termòmetre d'infrarojos NJTY T-600A Manual d'instruccions del termòmetre d'infrarojos NJTY T-600A. Coneix les seves característiques, funcionament segur, relació distància-punt, configuració d'emissivitat, manteniment i especificacions tècniques per a una mesura precisa de la temperatura sense contacte.
	Multímetre analògic NJTY sèrie 88: manual d'usuari i guia tècnica Manual d'usuari complet per als multímetres analògics de la sèrie NJTY 88, que cobreix les característiques, les especificacions, les precaucions de seguretat i les instruccions de mesura per a voltatges de CC/CA.tage i corrent, resistència, capacitança, freqüència i més.
	NJTY S18D Digital Multimeter User Manual User manual for the NJTY S18D Digital Multimeter, detailing safety instructions, panel indications, operational guidelines, and technical specifications for accurate electrical measurements. Features include IEC-61010 compliance, backlit LCD, True RMS, and auto-ranging.
	Multímetre LCR NJTY T21L: Multímetre digital de rang automàtic amb TRUE RMS - Manual d'usuari Manual d'usuari complet per al multímetre LCR NJTY T21L, un multímetre digital de rang automàtic amb TRUE RMS. Cobreix les especificacions, la seguretat, el funcionament i les funcions de mesura de vol.tage, corrent, resistència, capacitança, inductància, freqüència i temperatura.
	Multímetre LCR NJTY T21L: Multímetre digital de rang automàtic amb TRUE RMS - Manual d'usuari User manual for the NJTY T21L LCR Meter, an auto-ranging digital multimeter with TRUE RMS. Covers features, safety, technical specifications, and operation for accurate electrical measurements.
	Guia de l'usuari del multímetre punter NJTY: característiques, especificacions i instruccions Guia d'usuari completa per al multímetre punter NJTY, que detalla el seu aspecte, especificacions i funcions de mesura (volts CC/CA).tage, corrent, resistència, capacitança, etc.), i recordatoris importants de seguretat.

NJTY T400, T400A, T600, T600A