ANENG TH201 Infrared Thermometer Instruction Manual

1. Introduction

The ANENG TH201 is an industrial infrared thermometer designed for non-contact temperature measurement. It allows for safe and quick measurement of surface temperatures for various hot, hazardous, or hard-to-reach objects. The unit comprises optics, a temperature sensor, a signal amplifier, a processing circuit, and an LCD display. The optics collect infrared energy emitted by an object and focus it onto the sensor, which then translates this energy into an electrical signal. This signal is amplified, processed, and displayed digitally on the LCD screen.

Figure 1: ANENG TH201 Industrial Infrared Thermometer with laser aiming.

2. Safety Warnings and Cautions

2.1. Warning

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

• Before use, inspect the plastic housing for any damage. Do not use if damaged.
• Do not point the laser directly at eyes or indirectly off reflective surfaces.
• Do not use this unit in environments with explosive gas, steam, or dust.

2.2. Caution

To prevent damage to the unit or the target, avoid the following situations:

• Exposure to electromagnetic fields (EMF) from arc welders or induction heaters.
• Thermal shock caused by large or abrupt ambient temperature changes. Allow 30 minutes for the unit to stabilize before use.
• Do not leave the unit on or near objects of high temperature.

3. Setup

3.1. Battery Installation

The ANENG TH201 requires two 1.5V AAA batteries (not included). To install:

1. Open the battery compartment lid located at the bottom of the handle.
2. Insert two AAA batteries, ensuring correct polarity (+/-).
3. Close the battery compartment lid securely.

Figure 2: Detail of the open battery slot for AAA batteries.

4. Operation

4.1. Basic Temperature Measurement

To take a temperature reading:

1. Point the thermometer at the target surface.
2. Pull and hold the trigger to turn on the unit and initiate measurement. The laser will activate for aiming.
3. The temperature will be displayed on the LCD screen.
4. Release the trigger to hold the reading on the screen (HOLD icon will appear) for approximately 7 seconds before automatic power-off.

Figure 3: Rapid temperature measurement with a single click.

4.2. Unit Switching (°C/°F)

Press the '°C/°F' button on the control panel to switch between Celsius and Fahrenheit temperature units.

4.3. Backlight Control

Press the backlight button to turn the screen backlight on or off. This feature enhances readability in dark environments.

Figure 4: The backlit screen for clear readings in low light.

4.4. Laser Aiming

The integrated laser is used for precise aiming at the target measurement area. Press the laser switch key to toggle the laser on or off.

Figure 5: Using single-point laser for precise measurement positioning.

4.5. Locating Hot Spots

To identify a hot spot, aim the thermometer at an area outside of interest. Then, scan across the surface with an up and down motion until the hot spot is located. The highest temperature reading will indicate the hot spot.

5. Display and Buttons

5.1. LCD Display Elements

The LCD display shows the following indicators:

• Data Hold Icon: Indicates that the current reading is held on the screen.
• Scanning Icon: Appears when the trigger is pulled and the device is actively measuring.
• Laser On Icon: Indicates the laser aimer is active.
• Backlight On Icon: Indicates the screen backlight is active.
• Low Battery Icon: Warns when battery power is low.
• Fahrenheit Unit (°F): Indicates temperature is displayed in Fahrenheit.
• Celsius Unit (°C): Indicates temperature is displayed in Celsius.
• Temperature Reading: The measured temperature value.

5.2. Control Buttons

The device features the following buttons:

• Trigger: Pull to initiate measurement (SCAN icon appears). Release to hold the reading (HOLD icon appears) for approximately 7 seconds. Features a built-in 7-second auto power-off function.
• Laser On/Off Button: Toggles the laser aimer.
• Celsius / Fahrenheit Switch Button: Switches between temperature units.
• Backlight On/Off Button: Toggles the screen backlight.

Figure 6: Labeled components and display of the ANENG TH201.

6. Measurement Tips

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

When taking measurements, consider the Distance to Spot Size (D:S) ratio, which for this unit is 12:1. This means that as the distance (D) from the target surface increases, the spot size (S) of the area being measured also increases proportionally. Ensure the target is larger than the unit's spot size for accurate readings. For critical accuracy, the target should be at least twice the spot size.

Figure 7: Diagram illustrating the 12:1 distance to spot size ratio.

6.2. Emissivity

Most organic materials and painted or oxidized surfaces have a default emissivity of 0.95, which is pre-set in this unit. Inaccurate readings may occur when measuring shiny or polished metal surfaces. To compensate, cover the target surface with masking tape or flat black paint. Measure the temperature of the tape or paint once it reaches the same temperature as the underlying material.

6.3. Specific Measurement Scenarios

• Boiling Liquids: When measuring boiling liquids, do not let smoke and water vapor come into contact with the temperature sensing area. The recommended measurement angle is between 45° and 60° to avoid incorrect readings.
• Air Conditioning: Measure air conditioning trend temperatures.
• Electrical Boxes: Check temperatures within electrical distribution boxes.
• Refrigerators/Freezers: Measure refrigeration temperatures. If the temperature is too low, a low temperature alarm may be issued.
• Car Engines: Monitor car engine temperatures.
• Food and Boilers: Suitable for food temperature measurement and boiler temperature checks.

Figure 8: Visual guide for correct water/oil temperature measurement.

Figure 9: Examples of using the thermometer for air conditioner and distribution box temperature measurement.

Figure 10: Measuring high and low temperatures in various settings.

7. Maintenance

7.1. Lens Cleaning

To clean the lens:

• Blow off any loose particles using clean compressed air.
• Gently brush away remaining debris with a moist cotton swab. The swab can be moistened with water.

7.2. Case Cleaning

Clean the device case with a damp sponge or cloth and mild soap. Do not use solvents to clean the plastic lens, and do not submerge the unit in water.

8. Specifications

Figure 11: Detailed product parameters.

9. User Tips

• For optimal accuracy, especially when measuring shiny surfaces, apply masking tape or flat black paint to the target area and allow it to reach the object's temperature before measuring.
• Always maintain the recommended distance-to-spot ratio (12:1) for precise readings. The closer you are to a small target, the more accurate the measurement.
• Remember that this is an industrial thermometer and is not intended for measuring human or animal body temperature.

10. Troubleshooting

• Device does not power on: Ensure AAA batteries are correctly installed with the proper polarity and have sufficient charge. Replace batteries if the low battery icon appears.
• Inconsistent readings: Check for thermal shock (sudden changes in ambient temperature). Allow the unit to stabilize for 30 minutes if moved between environments with significant temperature differences. Also, ensure there is no strong electromagnetic interference from nearby equipment like arc welders.
• Inaccurate readings on shiny surfaces: Refer to the Emissivity section (6.2) for tips on how to measure reflective materials.

11. Warranty and Support

This product is designed for industrial and household use. For detailed warranty information and support, please refer to the official product documentation or contact the manufacturer directly. The manufacturer reserves the right to modify product design and specifications without prior notice.

A comprehensive user manual is also available in PDF format for detailed instructions and diagrams. You can access it via the following link: ANENG TH201 User Manual (PDF)