UT303A+ - Thermomètre Uni-T - Notice d'utilisation et mode d'emploi gratuit

Type de produit	Thermomètre infrarouge sans contact
Marque	Uni-T
Modèle	UT303A+
Plage de mesure	-32°C à 800°C (-25.6°F à 1472°F)
Rapport distance/spot (D:S)	30:1
Précision	±1.5°C ou ±1.5% de la lecture (la plus grande valeur)
Émissivité	0.1 à 1.0 (réglable, 5 préréglages)
Temps de réponse	≤250 ms (95% de la lecture)
Affichage	Écran LCD couleur EBTN, 35×35 mm
Alimentation	1 pile 9V (6F22)
Autonomie de la pile	≥9 h (alcaline), ≥4 h (carbone)
Dimensions (L×l×H)	179.0 × 126.5 × 53.0 mm
Poids net	310 g
Fonctions principales	MAX/MIN/MOY/DIF, verrouillage mesure, alarmes haut/bas, laser de visée, bascule °C/°F, rétention de données
Laser	Classe 2, <1 mW, 630-670 nm
Température de fonctionnement	0°C à 50°C (32°F à 122°F)
Température de stockage	-20°C à 60°C (-4°F à 140°F)
Entretien et nettoyage	Nettoyer la lentille avec un coton-tige humide ; extérieur avec un chiffon doux humide. Ne pas immerger.
Sécurité	Ne pas regarder directement le laser ; ne pas utiliser près de substances inflammables ; ne pas désassembler.
Accessoires inclus	Pile 9V, manuel d'utilisation (non inclus dans la notice numérique)
Réparabilité	Réparation par un professionnel qualifié uniquement
Garantie	1 an contre les défauts de matériaux et de fabrication

FOIRE AUX QUESTIONS - UT303A+ Uni-T

Comment allumer le thermomètre UT303A+ ?

Appuyez brièvement sur la gâchette pour allumer l'appareil. Les données de la dernière mesure s'affichent.

Comment effectuer une mesure de température ?

Visez la cible avec le laser, puis appuyez et maintenez la gâchette. L'icône SCAN clignote pendant la mesure. Relâchez pour afficher la valeur mesurée (HOLD).

Que signifie l'affichage 'OL' ou '-OL' ?

OL indique que la température mesurée dépasse la plage maximale (800°C). -OL indique qu'elle est inférieure à la plage minimale (-32°C). Arrêtez immédiatement la mesure dans ces cas.

Comment régler l'émissivité ?

En mode HOLD, appuyez plusieurs fois sur SET jusqu'à voir le réglage d'émissivité. Utilisez ▲ pour sélectionner un préréglage (P1-P5) ou ajustez avec ▼/▲ par pas de 0,01.

La mesure est imprécise, que faire ?

Vérifiez l'émissivité, la distance (D:S ratio 30:1), assurez-vous que la cible est au moins 2 fois plus grande que le spot. Évitez la vapeur, la poussière ou les fortes variations de température ambiante.

Comment utiliser la fonction de mesure verrouillée ?

Activez la mesure verrouillée dans les réglages (SET). Vous pouvez régler une durée (1 min à 5 h). Appuyez brièvement sur la gâchette pour démarrer ; l'icône apparaît. La mesure s'arrête automatiquement à la fin du temps imparti.

Comment changer la pile ?

Ouvrez le couvercle de la pile à l'arrière de l'appareil. Insérez une pile 9V (type 6F22) en respectant la polarité. Refermez le couvercle.

Le laser ne s'allume pas, pourquoi ?

Vérifiez d'abord le niveau de la pile (icône de batterie faible). Si la pile est bonne, assurez-vous que le laser est activé en appuyant sur le bouton (laser switch). Un laser faible peut aussi indiquer une pile usée.

Comment régler les alarmes haute et basse ?

En mode HOLD, appuyez sur SET une fois pour la limite haute, deux fois pour la limite basse. Utilisez ▲ pour sélectionner un préréglage (P1-P5) ou ajustez la valeur. Activez/désactivez l'alarme sonore via le menu Audible Alarm.

Que faire si l'appareil affiche 'Er' au démarrage ?

L'appareil a dépassé sa température de fonctionnement (0°C à 50°C). Placez-le dans un environnement adapté et attendez 30 minutes avant de réessayer.

MODE D'EMPLOI UT303A+ Uni-T

UT301A+/UT302A+/UT303A+

Infrared Thermometer User Manual

Preface

Thank you for purchasing the new infrared thermometer. In order to use this product safely and correctly, please read this manual thoroughly, especially the Safety Instructions part.

After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference.

Limited Warranty and Liability

Uni-Trend guarantees that the product is free from any defect in material and workmanship within one year from the purchase date. This warranty does not apply to damages caused by accident, negligence, misuse, modification, contamination and improper handling. The dealer shall not be entitled to give any other warranty on behalf of Uni-Trend. If you need warranty service within the warranty period, please contact your seller directly.

Uni-Trend will not be responsible for any special, indirect, incidental or subsequent damage or loss caused by using this device. As some countries or regions do not allow limitations on implied warranties and incidental or subsequent damages, the above limitation of liability may not apply to you.

Introduction

UT301A+/UT302A+/UT303A+ infrared thermometer (hereinafter referred to as the thermometer) can quickly and accurately determine the surface temperature by measuring the infrared energy radiated from the target surface. It is suitable for non-contact surface temperature measurement.

The D:S ratios are:

UT301A+: 12:1

UT302A+: 20:1

01303A+: 30:1

Safety Instructions

213 Warning: To prevent eye damage or personal injury, please read the following safety instructions before using the thermometer:

- Please do not irradiate people or animals with laser directly or indirectly.

- Please do not look at the laser directly or through other optical tools (telescope, microscope, etc.).

LASER RADIATION DO NOT STARE INTO BEAM

OUTPUT <1mW

COMPLIANCE WITH IECIEN 60825-1, EN 50689. CLASS 2-LASER PRODUCT

Precautions:

- Do not look directly at the laser emitter.

- Do not disassemble or modify the thermometer or laser.

- To ensure the safety and accuracy of the thermometer, it should only be repaired by a qualified professional

- If the bottom rendered on the 120-dial

- If the battery symbol on the LCD display is missing, please replace the battery immediately to prevent inaccurate management.

- Inspect the case before using the thermometer. Do not use the thermometer if it appears damaged. Look for

cracks or missing plastic.

- Please refer to the emissivity information for the actual temperature. Highly reflective objects

materials can cause the measured temperature value to be lower than the actual

- When measuring high temperature surfaces, please be aware not to touch them.

- Do not use the thermometer in an environment close to flammable or explosive materials.

- Using the thermometer around steam, dust, or environments with large temperature fluctuations may lead to increased temperature pressure.

Inaccurate temperature measurement. To ensure measurement accuracy places place the thermometers in the measurement environment for 20

- To ensure measurement accuracy, please place the thermometer in the measurement environment for 50 minutes before using

● Avoid keeping the the

(1) 2017年1月1日

Technical Specifications

Model	UT301A+	UT302A+	UT303A+
D:S ratio	12:1	20:1	30:1
Measuring range	-32°C~420°C/-25.6°F~788°F	-32°C~700°C/-25.6°F~1292°F	-32°C~800°C/-25.6°F~1472°F
LCD size	30mm*30mm	35mm*35mm	35mm*35mm

LCD display	Color EBTN
Accuracy	<0°C; ± (1.5°C+0.1°C/°C);±0°C; ±1.5°C or ±1.5% of reading, whichever is greater <32°F; ± (3.0°F+0.1°F/°C); ±32°F; ±3.0°F or ±1.5% of reading, whichever is greater
Temperature coefficient	±0.1°C/°C or ±0.1%/°C, whichever is greater (±0.1°F/°F or ±0.1%/°F, whichever is greater)
Repeatability	0.7°C or 0.7%, whichever is greater (1.5°F or 0.7%, whichever is greater)
Emissivity	0.1–1.0 (adjustable, can store 5 sets of preset values)
Response time	≤250ms (95% of reading)
Spectral response	8um–14um
Auto power off	15s
Low battery indication	√
High/Low temperature LED alarm	√
High/Low temperature audible alarm	√
Data hold	√
Unit conversion (°C/°F)	√
MAX/MIN/AVG/DIF mode	√
Lock measurement	√
Laser	Single laser, wavelength 630nm–670nm; output power <1mW, class 2 laser
Operating temperature	0°C–50°C (32°F–122°F)
Storage temperature	-20°C–60°C (-4°F–140°F)
Operating humidity	< RH90% (non-condensing)
Drop test	1m
Battery type	9V battery (6F22)
Battery life	Continuous temperature measurement: ≥9 hours for the alkaline battery; ≥4 hours for the carbon battery
Product color	Red and grey
Product net weight	204g	310g	310g
Product size	161. 50x90. 00x48. 00 (mm)	179. 00x126. 50x53. 00 (mm)	179. 00x126. 50x53. 00 (mm)

Safety Standards

CE certification: EN61326-1,61326-2-3

Laser safety standard: IEC 60825-1:2014 EN 60825-1:2014+A11:2021 EN 50689:2021

Reference Standard

JJG 856-2015

Product Features

- Precise single laser pin

• Bright color EBTN display

• MAX/MIN/AVG/DIF value hold

- 5 sets of high/low temperature alarm preset values and 5 sets of emissivity preset values can be stored for users to

- With triceps (a

- Lock measurement, for processes that require temperature monitoring

- With Tripod mount installation hole

External Structure

1	Laser
2	Infrared sensor
3	Trigger
4	Battery cover
5	Tripod screw hole
6	LCD display
7	MODE button
8	SET button
9	HI/LO button
10	Laser switch button
11	Laser warning label

Technical diagram of a handheld device with numbered parts and an inset close-up view showing internal components.

LCD Description

	Lock measurement indicator
	Buzzer indicator
HI OK LO	Temperature measurement alarm indicator
	Low battery indicator
SCAN	Temperature measurement indicator
HOLD	Temperature hold indicator
°C °F	Temperature unit indicator
8889	Main display of the measured temperature
8888	Auxiliary display of the measured temperature
= 0.88	Emissivity indication
	Laser indicator
MAX BINAVD DIFF	Measurement mode indication

Operating Instructions

In the off state, short press (less than 0.5s) the trigger to turn on the thermometer and the measurement data held before last shutdown will be displayed. Toggle to view the MAX/MIN/AVG/DIF value by short pressing the MODE button.

Auto Power Off

In the HOLD mode, if there is no operation for 15s, the thermometer will automatically power off and save the currently held measurement.

Manual Measurement

1. Pull and hold the trigger after aiming at the target. The SCAN icon will be flashing indicating that the target short temperature is being measured. The measurement result will be updated on the LCD

2. Release the trigger, the SCAN icon disappears, and the HOLD icon appears, indicating that the measurement has been stopped and the last measured value is held.

Lock Measurement

Description:

- In the lock measurement function setting interface, the lock measurement time (1 minute to 5 hours) can be set. Refer to Lock Measurement Setting for details

- After time setting, the measurement starts after the activation of the lock function. When the set time is reached, the thermometers will automatically prevent off and save the last measured value.

- You can view the measured values by short pressing (less than 0.5s) the trigger (NOTE: The measured values will be cleared by long press). This operation is applicable to processes that require regular monitoring of temperature. If no timing is needed, just do not set the time.

Operation

1. When the lock measurement function is turned on, short press the trigger to enable it. The 🔒 icon will appear on the thermometer screen and the SCAN icon will flash. The thermometer will continuously measure the target temperature.

2. Pull the trigger again, the 🔒 and SCAN icons disappear, and the HOLD icon appears. The thermometer stops the measurement and holds the last measured value.

NOTE: During measurement, it is best to ensure that the measured target diameter is twice the spot size (S) of the thermometer, and then determine the test distance (D) according to the D:S diagram (refer to D:S part).

For example, if you use the UT301A+ to measure the temperature of an object with a diameter of about 4" (10cm), then according to the above, the spot size (S) of the thermometer should be about 2" (5cm) for highest accuracy, and according to the D:S diagram, the measured distance (D) is about 24" (60 cm).

MAX/MIN/AVG/DIF Value Reading

Short press the MODE button to switch the "MAX→MIN→AVG→DIF" measurement mode in turn and the temperature value of the corresponding mode will be shown in the auxiliary display area (as shown below).

Laser Indication Function On/Off

Short press the 🔒 button to turn on/off the laser indication function. When it is turned on, the laser indicator 🔒 will be displayed on the LCD, and the laser will accurately indicate the position you are measuring during temperature measurement.

NOTE: Please follow the laser precautions when the laser is turned on to avoid damage to human or animal eyes.

High/Low Temperature Alarm On/Off

Short press the HI/LO button to turn the high/low limit alarm function on and off in sequence.

When HI limit alarm function is turned on and the measured temperature value is higher than the set high alarm limit, the red LED and HI indicator flash. If the audible alarm function has been turned on, the buzzer will beep.

When LO limit alarm function is turned on and the measured temperature value is lower than the set low alarm limit, the blue LED and LO indicator flash. If the audible alarm function has been turned on, the buzzer will beep. When HI/LO limit alarm function is turned on and the measured temperature value is within the high and low alarm limit range, the green LED lights up and the OK indicator is displayed, indicating that the measured temperature is normal.

Function Setting

In the HOLD interface, short press the SET button to enter the settings of high alarm limit →low alarm limit → emissivity → temperature unit → audible alarm → lock measurement, etc. In these setting interfaces, pull the trigger or do not operate for 10s to return to the HOLD interface.

High Alarm Limit Setting

In the HOLD interface, short press the SET button once to enter the high alarm limit setting interface. Short press the ▲ button to quickly select the preset high alarm limit value (P1-P5). If there is no desired value among the preset values, select any value closest to the high alarm limit, and adjust it by pressing the ▼ button or ▲ button. Add or subtract 1 each time by short press, and add or subtract 10 per second by long press.

Figure 1

Low Alarm Limit Setting

In the HOLD interface, short press the SET button twice to enter the low alarm limit setting interface, and adjust the low alarm limit value by pressing the ▼ button or ▲ button. Add or subtract 1 each time by short press, and add or subtract 10 per second by long press. (see Figure 2)

Emissivity Setting

In the HOLD interface, short press the SET button until emissivity setting is displayed. Short press the ▲ button to quickly select the preset emissivity value (P1-P5). If no desired value among the preset values, select any value closest to the emissivity, and adjust it by pressing the ▼ button or ▲ button. Add or subtract 0.01 each time by short press, and add or subtract 0.1 per second by long press. (see Figure 3)

Temperature Unit Setting

In the HOLD interface, short press the SET button until temperature unit setting is displayed, and switch between °C and °F by pressing the ▼ button or ▲ button.

Audible Alarm Setting

In the HOLD interface, short press the SET button until audible alarm setting is displayed, and turn on/off the audible alarm by pressing the ▼ button or ▲ button.

Lock Measurement Setting

In the HOLD interface, short press the SET button until lock measurement setting is displayed, and turn on/off the lock measurement by pressing the ▼ button or ▲ button. When the lock measurement is turned on, press the △ button to perform the timing setting "00:00" for the lock measurement. At this time, the selected time position flashes, and the time value can be adjusted by pressing the ▼ button or ▲ button. Set timing to "00:00" to turn off timing function.

D:S (Distance Coefficient)

As the distance (D) from the target being measured to the thermometer increases, the spot size (S) on the measured area becomes larger. The relationship between the distance and the spot size is as shown below.

Spot Size @ Distance D:S=12:1 S 4.8m 300 1.8m 200 1.6m 200 1.4m 200 1.2m 200 1.0m 200 0.8m 200 0.6m 200 0.4m 200 0.2m 200 0.0m UT301A+ D:S=12:1 Spot Size @ Distance D:S=20:1 S 3.8m 1.8m 200 1.6m 200 1.4m 200 1.2m 200 1.0m 200 0.8m 200 0.6m 200 0.4m 200 0.2m 200 0.0m UT302A+ D:S=20:1 Spot Size @ Distance D:S=30:1 S 1.8m 1.6m 200 1.4m 200 1.2m 200 1.0m 200 0.8m 200 0.6m 200 0.4m UT303A+ D:S=30:1

Field of View

Make sure that the measured target is larger than the spot size. The smaller the target, the closer the test distance should be (please refer to D:S for the spot size at different distances). To obtain the optimum measurement result, it is recommended that the target being measured is 2 times larger than the spot size.

Emissivity

Emissivity is a symbol of the energy radiation of a material. The emissivity of most organic materials and coated or oxidized surfaces is about 0.95. To measure the temperature of a bright metal surface, cover the surface to be tested with masking tape or matt black paint with a high emissivity setting (if it is possible), wait for a period of time, and measure the temperature of the tape or black paint surface when it reaches the same temperature on the surface of the object covered below. The total emissivity of some metals and non-metals are listed in the following table.

Measured Surfaces	Emissivity
Metal
Aluminum
Oxidization	0.2-0.4
A3003 Alloy
Oxidization	0.3
Rough	0.1-0.3
Brass
Burnishing	0.3
Oxidization	0.5
Copper
Oxidization	0.4-0.8
Electric Terminal Board	0.6
Hastelloy
Alloy	0.3-0.8
Inconel
Oxidization	0.7-0.95
Sand-Blasting	0.3-0.6
Electro Burnishing	0.15
Iron
Oxidization	0.5-0.9
Rusting	0.5-0.7
Iron (Casting)
Oxidization	0.6-0.95
Non-Oxidization	0.2
Casting	0.2-0.3
Iron (Forging)
Passivation	0.9
Lead
Rough	0.4
Oxidization	0.2-0.6
Molybdenum
Oxidization	0.2-0.6
Nickel
Oxidization	0.2-0.5
Platinum
Black	0.9

Steel
Cold Rolling	0.7-0.9
Steel Plate Rubbing	0.4-0.6
Steel Plate Burnishing	0.1
Zinc
Oxidization	0.1
Non-Metal
Asbestos	0.95
Asphalt	0.95
Basalt	0.7
Carbon
Non-Oxidization	0.8-0.9
Graphite	0.7-0.8
Silicon Carbide	0.9
Ceramics	0.95
Clay	0.95
Concrete	0.95
Cloth	0.9
Glass
Convex Glass	0.76-0.8
Smooth Glass	0.92-0.94
Lead-Boron Glass	0.78-0.82
Plates	0.96
Plaster	0.8-0.95
Ice	0.98
Limestone	0.98
Paper	0.95
Plastics	0.95
Water	0.93
Soil	0.9-0.98
Wood	0.9-0.95

Maintenance

Clean

Use clean compressed air to blow away falling particles.

Use wet cotton swab to carefully wipe lens surface. Use wet cotton soft cloth to clean product exterior.

Use wet sponge or soft cloth to clean product exterior. Do not rinse the thermometer or immerse it in water.

Battery Replacement

Install or replace a 9V battery (6F22) as follows:

1. Open the battery cover.

2. Insert the battery and pay attention to the polarity.

3. Close the battery cover.

Troubleshooting

Symptom	Problem	Action
OL appears when measuring	Measured value is greater than the maximum fange	Stop measuring
-OL appears when measuring	Measured value is less than the minimum range	Stop measuring
En appears when booting	Exceeding the minimum or maximum operating ambient temperature	Place the thermometer in a 0°C–50°C (32°F–122°F) environment and it can be recovered after 30 minutes
Battery indicator flashes	Low battery	Replace the battery
Laser falls to work / week laser	Low battery	Replace the battery
The measurement is inaccurate	Emissivity mismatching, measured distance is too far, measured target diameter is less than 20mm, etc.	Please refer to the instructions for field of view, D/S, etc.

UNI-T®

UNI-TREND TECHNOLOGY (CHINA) CO., LTD.

No. 6, Gong Ye Bei 1st Road.

Songshan Lake National High-Tech Industrial

Development Zone, Dongquan City,

Guangdong Province, China

Tel: [phone]

www.uni-trend.com