Benetech GM900 - User Manual

MODEL: GM900
Infrared thermometer
Instruction manual
A. Introduction
This infrared thermometer is used for measuring
the temperature of the object's surface, which is
applicable for various hot, hazardous or hard to
reach objects without contact safely and quickly.
This unit consist of Optics, Temperature Sensor
Signal amplifier, Processing circuit and LCD Display.
The Optics collected the infrared energy emitted by
object and focus onto the Sensor. Then the sensor
translates the energy into an electricity signal. This
signal will be turned out to be digital shown on the
LCD after the signal amplifier and processing circuit.
B. Warning & Cautions
1. Warning:
To avoid the potential situation may cause harm or
damage to people, please pay attention to the
following items:
1) Before you use this unit, check on the plastic
housing carefully. If there is any damage, do not
use it
2) Do not point laser directly at eye or indirectly off
reflective surfaces.
3) Do not use this unit in the environment of
explosive gas, steam or dusty.
2. Caution:
To avoid the damage of the unit or the target, please
protect from the following situations:
1) EMF (electro-magnetic fields) from arc welders, or
induction heaters.
2) Thermal shock caused by high temperature changes
allow 30 minutes for unit to stabilize before use.
3) Do not leave the unit on or near objects of high
temperature
2) Field of view: Make sure the target is larger than
the unit's spot size. The smaller the target the
closer measure distance. When accuracy is
critical, make sure the ta get is at least twice as
large as the spot size.
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C. Distance to Spot size
1) When take measurement, pay attention to the
D stance to Spot Size. As the Distance (D)
from the target surface increases, the spot size
(S) of the area measured by the unit becomes
larger. The Distance to Spot size of the unit is
12:1
***This unit is equipped with a laser, which is used for
aiming.
D. Emissivity
Emissivity, Most organic materials and painted or
oxidized surfaces have an emissivity of 0.95 (pre-set
in the unit). Inaccurate readings will result from
measuring shiny or polished metal surfaces. To
compensate, cover the target surface with masking
tape or flat black paint. Measure the tape or painted
surface when the tape or painted reach the same
temperature as the material underneath.
Material Emissivity Material Emissivity
Aluminum 0.3 Iron 0.70
Asbestos 0.95 Lead 0.5
Asphalt 0.95 Limestone 0.98
Basalt 0.70 Oil 0.94
Brass 0.5 Paint 0.93
Brick 0.90 Paper 0.95
Carbon 0.85 Plastic 0.95
Ceramic 0.95 Rubber 0.95
Concrete 0.95 Sand 0.90
Copper 0.95 Skin 0.98
Dirt 0.94 Snow 0.90
Frozen food 0.90 Steel 0.80
Hot food 0.93 Textiles 0.94
Glass(Plate) 0.85 Water 0.93
Ice 0.98 Wood 0..94
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Summary

Warning & Cautions

General Warnings

Important safety warnings to prevent harm or damage, including checks before use, laser safety, and usage environment.

Operational Cautions

Precautions to prevent damage to the unit or target, including EMF, thermal shock, and high-temperature environments.

Distance to Spot Size

Emissivity

Operation

Device Buttons

Details the functions of the physical buttons on the thermometer, including trigger, laser/backlight, and mode selection keys.

LCD Display Elements

Identifies various icons and indicators on the LCD screen, such as measurement reading, unit, laser, backlight, and battery status.

Key Functions Overview

Details various operational modes including MAX, MIN, DIF, AVG, HAL, LAL, STO, and EMS for advanced measurement and data handling.

Celsius;Fahrenheit Conversion

Instructions on how to switch between Celsius and Fahrenheit temperature units via a slide switch inside the battery compartment.

Maintenance

Lens Cleaning

Instructions for cleaning the thermometer's lens using compressed air and a moist cotton swab.

Case Cleaning

Guidance on cleaning the unit's exterior case with a damp sponge or cloth and mild soap.

Specifications

Benetech GM900 Specifications

General

Type	Infrared Thermometer
Measurement Range	-50°C to 900°C (-58°F to 1652°F)
Resolution	0.1°C/0.1°F
Response Time	500ms
Display	LCD with Backlight
Power Supply	9V Battery
Distance to Spot Ratio	12:1
Battery Life	Approx. 12 hours
Emissivity	0.10~1.00 Adjustable
Spectral Response	8-14μm