NAVAC NMT300 Infrared Thermometer User Manual

: June 6, 2024
: NAVAC

Table of Contents

NAVAC NMT300 Infrared Thermometer
SAFETY INSTRUCTION
FEATURES
WORKING PRINCIPLE
OPERATING METHODS
SETTING OPERATION
MAINTENANCE
FAULT DIAGNOSIS
CE CERTIFICATION
SPECIFICATION
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NAVAC NMT300 Infrared Thermometer

NAVAC NMT300 Infrared Thermometer fig
1 OVERVIEW

NMT300 non-contact Infrared Thermometer (hereinafter referred to as “thermometer’) is capable of confirming the surface temperature by measuring infrared energy radiated

NMT300 non-contact infrared thermometer is intelligently designed with ultra-low power consumption, which ensures long-term operation, saves user from frequent replacement of battery and the worry from under-voltage at work. The intelligent design facilitates testing, quicker capturing of the true value of the measured object.

SAFETY INSTRUCTION

warning

To avoid electric shocking or personal injury, please follow the following instructions:
Do not direct laser at eyes or on indirect reflection surface.
Prior to use the thermometer, please check the box. If any damage to the thermometer were found, please do not use it. Inspect for damage or any shortage of plastic parts.
Replace the battery immediately once the battery indicator “appears.
Do not use the thermometer in case of any abnormality, as the protection may be damaged and affected. In case of any doubt, please deliver the thermometer for maintenance.
Do not use the thermometer near the explosive gas, steam or dust.
To avoid scorching, it is necessary to remember that the object with high reflection rate will normally cause the measured temperature value lower than the actual temperature.
The equipment protection may be degraded in case of failure to use the equipment as per the manual.

Caution

To avoid any damage to the thermometer or measured device, please protect them from the following damages:

EMF from the electric welder, electro-induction heater;
Static electricity;
Thermal shock (caused by larger or abrupt environmental temperature-
Do not allow the thermometer running all the way or near any object with high temperature.

FEATURES

Single-point laser aiming.
White backlight.
Synchronous display of the measured maximum or minimum
value.
Option of Celsius/Fahrenheit.
Dynamic monitoring of battery capacity.
Low voltage indication.
Display screen.
Adjustable emissivity.
Sound alarm for the upper and lower temperature limit.

WORKING PRINCIPLE

Infrared thermometer can measure surface temperature of opaque objects. Its optical device can sense the infrared energy concentrated on the detector, and the electronic components convert information into temperature reading
which is displayed on the display screen. Laser is only used for aiming the target object.

OPERATING METHODS

To measure temperature, allow the thermometer aim at the measured target, push the trigger to display the real-time measured result; and loose the trigger to hold it. MAX/MIN is off when the middle button is pressed. The thermometer will automatically shut down if no action were detected out within 8s. The ratio of distance to light spot size and the field of view must be allowed for. Laser shall be only used to aim at target object

SETTING OPERATION

SET
Cyclical switching setting status: Click on SET to enter the cyclical switching setting status, which is designed with a circular order as follows: emissivity setting – ‘C/ “Fsetting -temperature limit value mute setting -high temperature limit value setting -low-temperature limit value setting. Under different setting status, the corresponding icon will flash, and with a 2s long press on SET, quit the setting status. After operation, “MAX/MIN” will be • .,.,, , and • ‘/J-/11,,. “will be •.a.• . When failure to perform the user setting, they would be displayed as “MAX/MIN” and ” ‘<ii&.•.

Emissivity setting
It is used to change the emissivity value. E= will flash during setting, click on • • • with a progressive increase of 0.01 and rapid increase with a long press until up to 1.00; while click on • .,. • with a progressive decrease of 0.01 and rapid decrease with a long press until down to O .1. “C/ ‘Fitting: It is used to display ‘C or “F. The set unit ‘C or “Fwill flash; click “Ji.” or “‘Y • to select tor “F in the cycle.

Temperature llmlt value mute setting
It is used to set the sound on/off for measured temperature exceeding high or low temperature limit value. When setting, the • ~ • will flash. It is able to select mute on/off in cycle by clicking on ”f'” or ‘Ji.” . When the mute setting is on, it will be displayed as “HIGH LOW’, and the buzzer will be mute in case measured temperature exceeds the high or low temperature limit value; while mute setting is off, it will be displayed as ► HIGH Low.,. “and buzzer will make sounds intermittently in case measured temperature exceeds the high or low temperature limit value.

HIGH limit value setting
It is used to set the high limit value and the buzzer will make intermittent sounds when measures temperature is higher than the set value. Press • SET • to switch to the flashing •HIGH·. When clicking on “Ji.” , the value will increase by 0. 1 in progression and it will increase rapidly after a long press, and then a sound will be heard when up to the highest value; When clicking on “‘f'” , the value will decrease by 0. 1 in progression and it will increase rapidly alter a long press, and then a sound will be heard when down to the lowest measured temperature value or equivalent to the LOW limit value. When•~” is flashing, it is allowed to set /cancel the function, and the function will be effective when ·••HIGH” is displayed.

LOW limit value setting

It is used to set the low limit value and the buzzer will make intermittent sounds when measures temperature is lower than the set value. Press ‘SET” to switch to the flashing HIGH”. When clicking on “Ji.” , the value will increase by
o. 1 in progression and it will increase rapidly after a long press, and then a sound will be heard when up to the highest value; When clicking on “‘f'” , the value will decrease by 0. 1 in progression and it will increase rapidly alter a long
press, and then a sound will be heard when down to the lowest measured temperature value. When ·~• is flashing, it is allowed to set/cancel the function, and the function will be effective when • LOW°’3 ” is displayed

FIND OUT THE HOT OR COLD POINT

To find out the hot or cold point, aim the thermometer at the region beyond the target, scan up and down the whole region slowly until find out the hot or cold point.

DISTANCE AND SPOT SIZE

With the increasing distance (D) from the measured target, the spot size (S) in the measured region (100’C) will also increase. Spot size represents 90% of the energy in the circle. The maximum D:S will be obtained when the distance between the data recorder and target, and the spot size of 50mm (2in) is generated.

FIELD OF VIEW

It is necessary to ensure the size of target larger than the spot size. The smaller the target, the closer the distance should be. The measurem~nt distance is recommended to be 75% less than the theoretical value

EMISSIVITY

Emissivity represents the energy emission of material. Most of organic materials and painted or oxidized surfaces have the emissivity of about 0. 95. If possible, masking tape or Berlin black< 150″C/ 302’F) should be applied to cover the measured surface and the high-emissivity device should also be used, as the metal surface with compensated light measurement may cause error reading. Wait a period of time to allow the tape or
oil stain to share the same temperature with that of surface of the covered object. Measure the temperature of the surface covered with tape or paint.

MAINTENANCE

Clean lens
Blow away the slipped off grains with clean compressed air. Wipe the surface carefully with wet cotton swab. A cotton swab should be moistened with clean water.
Clean chassis
Clean the chassis with cotton sponge or soft cloth with soap water or clean water. To prevent the thermometer from damage, do not soak the meter