BENETECH GT750 Infrared Thermometer Instruction Manual

BENETECH GT750 Infrared Thermometer

MODEL: GT750
COLOR SCREEN DISPLAY

Introduction

This infrared thermometer is used for measuring the tem- temperature Of the object’s surface, which is applicable for various hot, hazardous or hard-to- reach objects safely and quickly. This unit consists Of Optics, Temperature Sensor Signal amplifier, Processing circuit, and LCD Display. The Optics collected the infrared energy emitted by the Object and focused it onto I 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 proæssing circuit.

WARNING & CAUTIONS

Warning:
To avoid the potential situation that may cause harm or damage to people, please pay attention to the following items:

1.  Do not point the laser directly at the eye or indirectly off reflec­tive surfaces.
2. The unit cannot be measured through transparent surfaces such as glass or plastic. It will measure the surface tem­perature of these materials instead.
3. Steam, dust, smoke, or other particles can prevent accurate measurement by obstructing the unit optics.

Cautions:
Infrared thermometers should be protected for the following:

1. EMF (electro-magnetic fields) from arc welders, and induction heaters.
2. Thermal shock (caused by large or abrupt ambient temperature changes allow 30 minutes for the unit to stabilize before use).
3. Do not leave the unit on or near objects of high temperature.

Distance to spot size

1. When taking measurements, pay attention to the Distance 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.

2. Field of view:
   Make sure the target is larger than the unit’s spot size. The smaller the target the closer the measure distance. When accuracy is critical, make sure the target is at least twice as large as the spot size.

EMISSIVITY

Emissivity: Most organic materials and painted or oxidized surfaces have an emissivity of 0.95(preset in the unit). Inaccurate readings will result from measuring shiny or polished metal surfaces. To compensate for this, adjust the unit’s emissivity reading or cover the surface to be measured with masking tape or flat black paint. Measure the tape or painted surface when the tape or paint reaches the same temperature as the material underneath.

Operation

1. Operating the unit:

2. Open the battery door and insert a 9V battery properly.

3. Pull the trigger to turn on the unit.

4. Aim at the target surface and pull the trigger, then temp­erature will be shown on the LCD.
   This unit is equipped with a laser, which is only used for aiming.

5. Locating a Hot Spot: To find a hot spot, aim the thermometer outside of interest, then scan across with an up and down motion until you locate the hot spot. (Figure 1 ).

LCD display & buttons

LCD display:

• A: measuring reading
• B: measuring unit
• C: laser on icon
• D: backlight on an icon
• E: battery power icon
• F: scanning icon
• G: data hold icon
• H: mode/emissivity indicator I: data storage I read icon
• J: low-temperature alarm icon K: high-temperature alarm icon

Diagram description: (figure 2)

1. Trigger: When turning on LCD display VERXX software version for 1 sec. And turn to display reading with the SCAN icon. Release the trigger, and display reading with the HOLD icon. Built-in auto power off in 10sec.

2. Laser point switch

3. (3)-(6) key functions: press 3 key, LCD subdisplay blinks MAX-MIN-DIF-AVG-HAL-LAL-STO-EMS seg­ment(only main display means normal measuring mode) press 4 key to enter.

   • a. MAX: measuring maximum temperature.

   • b. MIN: measuring minimum temperature.

   • c. DIF: Basic on the reading before pressing the 4 key, compute the difference of current reading.

   • d. AVG: measuring average temperature.

   • e. HAL: high-temperature alarm–when selecting HAL, press 5 keys to set the high-temperature alarm trigger and confirm by pressing 4 keys. When reading over the trigger, the LCD displays the HI icon with BiBi audio sounds.

   • f. LAL: low temperature alarm–when selecting LAL, press 5 keys to set the low temperature alarm trigger and confirm by pressing 4 keys.
     When reading over the trigger, LCD displays a LOW icon with Bi Bi audio sounds.

   • g. STO: data storage–when selected STO, lock & DATA & 1—indicator will shown when press 4 key. After the temperature is read out press 6 key to store, then 2–­memory unit will be shown. There are 30 groups of memory units available. To recall the stored data in normal measuring mode by pressing 6 keys, remove all data by pressing 6 keys for 3 seconds.

   • H. EMS: Emissivity setup– press 5 key for emissivity settings, press 4 key to save setup and back to normal status.

4. (7) Celsius / Fahrenheit switch: Please open the battery and push the slide switch for conversion.

Maintenance

1. Lens Cleaning: Blow off loose particles using clean compressed air. Gently brush the remaining debris away with a moist cotton swab. The swab may be moistened with water.
2. Case cleaning: Clean the case with a damp spo­nge/cloth and mild soap.

Note:

1. Do not use solvent to clean plastic lenses.
2. Do not submerge the unit in water.

Specification

Accuracy

| o·c-1so·c(J2°F-1Ja2·F):± 1.s0c(±2.7’F)

or ± 1 . 5%

-so·c-o·c(-sa·F-32°F):± 3•c (± S°F)

Whichever is greater

Resolution| 0.1°c or0.1°F
Repeatability| 1% of reading or 1°C
Response time| 500 mSec , 95% response
Spectral response| Bum-14 um
Emissivity| 0.10-1.00 Adjustable (0.95 Preset)
Distance to Spot size| 12:1
Operating Temperature| o·c -40°C (32°F – 104°F)

Operating Humidity

| 10%RH-95%RH non-condensing, up to 30°C(86°F)
Storage Temperature| -2o·c – so·c (-4°F-140°F)
Power| 9V Alkaline or NiCd battery
Typical battery life (Alkaline)| Non-laser mode: 22 hrs; Laser Models:12 hrs
Weight| 222g
Dimension| 111’50’172mm

Specific Declarations:

• Our company shall hold no any responsibility resulting from using output from this product as direct or indirect evidence.
• We reserve the right to modify product design and specifications without notice.

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