1. Introduction
The CEM Industrial Dual Laser Infrared Thermometer series (DT-8867H, DT-8868H, DT-8869H) provides fast, easy, and accurate non-contact temperature measurements for various industrial applications. These devices are designed for high-temperature environments, offering a wide temperature range and advanced features for precise targeting and data analysis.
This manual provides essential information for the safe and effective use of your infrared thermometer. Please read it thoroughly before operation.
2. Key Features
- Dual Laser Targeting: Two laser points converge to precisely indicate the measurement spot, ensuring accurate targeting, especially at greater distances.
- Fast Sampling Time: Achieves readings in less than 150 milliseconds.
- High Distance-to-Spot Ratio (D:S): Up to 50:1, allowing measurement of smaller surface areas from a safe distance.
- Wide Temperature Range: Capable of measuring temperatures up to 2200°C (3992°F) depending on the model.
- Adjustable Emissivity: Digitally adjustable from 0.10 to 1.0 to accommodate various material surfaces for improved accuracy.
- K-Type Thermocouple Input: Supports contact temperature measurement with standard K-type thermocouples.
- Automatic Data Hold & Trigger Lock: For convenient reading and continuous measurement.
- Max, Min, DIF, AVG Record: Records maximum, minimum, difference, and average temperature values.
- High and Low Temperature Alarm: User-settable alarms to easily identify hot and cold spots.
- White Backlit LCD Display: Ensures easy reading in low light and dark environments.
- USB Interface: For data transfer to a PC (software included).
- Durable Construction: Made from ABS material.
3. Specifications
| Specification | DT-8867H | DT-8868H | DT-8869H |
|---|---|---|---|
| IR Temp. Range | -50ºC to 1650ºC (-58ºF to 3002ºF) | -50ºC to 1850ºC (-58ºF to 3362ºF) | -50ºC to 2200ºC (-58ºF to 3992ºF) |
| Response Time | Less than 150ms | ||
| Resolution | 0.1º up to 1000º, 1º over 1000º | ||
| Basic Accuracy (IR) | ±1.0% of reading | ||
| Optical Resolution (D:S) | 30:1 | 50:1 | |
| Emissivity | Adjustable 0.10~1.0 | ||
| Type K Temp. Range | -50ºC to 1370ºC (-58ºF to 2498ºF) | ||
| Basic Accuracy (TK) | ±1.5% of reading | ||
| Reading Memories | N/A | 99 | |
| Dimensions (H x W x D) | 204mm x 155mm x 52mm | ||
| Weight | 320g | ||
| Battery Included | Yes (9V battery, not included in accessories list but mentioned as included in product properties) | ||
| Certification | CE | ||
Note: Specifications are subject to change without notice. Please refer to the actual product for specific parameters.
4. Package Contents
Upon unpacking, please verify that all items listed below are present and undamaged:
- Infrared Thermometer Unit (DT-8867H, DT-8868H, or DT-8869H)
- USB Cable
- Tripod
- Software CD/Download Link
- Type-K Temperature Probe
- Carrying Case
- Gift Box
- User Manual (this document)
Note: A 9V battery is required for operation but may not be included in all packages. Please check your specific product listing.
5. Panel Information
Familiarize yourself with the components and display of your infrared thermometer:
This diagram illustrates the main components of the thermometer, including the infrared sensor, LCD display, K-type input jack, USB input jack, laser/backlight button, trigger, battery cover, and handle. It also details the LCD display elements such as measurement display, data retention, laser opening mark, lock key display, high/low temperature alarm, Max/Min/Avg/Dif values, current temperature, emissivity symbol, K-type symbol, low battery display, °C/°F display, data storage, and USB display.
Button Panel Description:
- Laser/Backlight On/Off Key: Toggles the laser pointer and display backlight.
- Up Selection Key: Used to select EMS (Emissivity) or HAL (High Alarm Limit) or LAL (Low Alarm Limit) values.
- Down Selection Key: Used to select EMS (Emissivity) or HAL (High Alarm Limit) or LAL (Low Alarm Limit) values.
- MODE Function Selection Key: Cycles through various functions and settings.
6. Operating Instructions
6.1 Powering On/Off
To power on the device, press the trigger. The device will automatically power off after a period of inactivity to conserve battery.
6.2 Taking an Infrared Measurement
- Point the thermometer at the target object.
- Press and hold the trigger. The dual lasers will activate, indicating the measurement spot.
- Ensure the two laser points converge to a single spot for optimal distance and accuracy.
- The temperature reading will be displayed on the LCD. Release the trigger to hold the data.
The dual laser sights help precisely locate the target point for accurate temperature measurement.
This diagram explains how the D:S ratio works, showing that at a distance of 50 inches (1270mm), the spot size is 1 inch (25.4mm). This high ratio allows for easy measurement of hard-to-reach targets.
6.3 Adjusting Emissivity
Emissivity (EMS) is a crucial setting for accurate infrared temperature measurement. Different materials have different emissivities. To adjust:
- Press the MODE button until 'EMS' appears on the display.
- Use the Up/Down selection keys to adjust the emissivity value between 0.10 and 1.0.
- Refer to the emissivity comparison table for common materials.
This table provides typical emissivity values for various substances like asphalt, concrete, human skin, wood, paper, and different metals, helping users adjust the thermometer for more accurate readings.
6.4 Using the K-Type Thermocouple
For contact temperature measurements, plug the K-type thermocouple into the designated input jack on the device. The display will show the K-type temperature reading.
Demonstrates how to use the K-type thermocouple for contact temperature measurement, complementing the infrared function.
6.5 Setting High/Low Temperature Alarms
The thermometer can alert you when measured temperatures exceed or fall below set thresholds:
- Press the MODE button until 'HAL' (High Alarm Limit) or 'LAL' (Low Alarm Limit) appears.
- Use the Up/Down selection keys to set your desired alarm temperature.
- An audible and/or visual alarm will activate if the measured temperature crosses these limits.
This image illustrates how the thermometer can easily find hot and cold spots by sending an alarm if the measured temperature exceeds set high or low limits. It also highlights support for various temperature display modes like maximum, minimum, difference, and equal value.
6.6 Data Recording and USB Interface
Models DT-8868H and DT-8869H support up to 99 readings in memory. Connect the device to a PC via the USB interface to transfer recorded data using the provided software for further analysis.
The clear, backlit LCD ensures easy reading of measurements in various lighting conditions.
7. Safety Notes
- Laser Safety: Do not look directly into the laser beam or point it at others. Avoid direct eye exposure.
- High Temperatures: Be aware of the high temperatures you are measuring. Use appropriate personal protective equipment (PPE) if necessary.
- Flammable/Explosive Environments: This product is NOT explosion-proof. Do not use in flammable or explosive environments.
- Electromagnetic Interference: Keep the device away from strong electromagnetic interference sources to ensure accurate readings.
- Maintenance: Do not attempt to disassemble or modify the product yourself, as this will void the warranty and may cause damage or injury.
- Battery Handling: Ensure correct battery polarity when replacing. Remove batteries if the device is not used for extended periods.
8. Maintenance
8.1 Cleaning
To clean the device, use a soft, damp cloth. Do not use abrasive cleaners or solvents. Pay special attention to keeping the infrared lens clean for accurate measurements.
8.2 Battery Replacement
When the low battery indicator appears on the LCD, replace the 9V battery. Open the battery cover located on the handle, remove the old battery, and insert a new one, observing correct polarity.
8.3 Storage
Store the thermometer in its carrying case in a cool, dry place when not in use. Avoid extreme temperatures and high humidity.
9. Troubleshooting
- Inaccurate Readings:
- Check and adjust the emissivity setting for the material being measured.
- Ensure the lens is clean and free from obstructions.
- Verify the distance to the target is within the optimal D:S ratio.
- Avoid strong electromagnetic interference.
- No Display/Device Not Powering On:
- Check the battery level and replace if necessary.
- Ensure the battery is inserted with correct polarity.
- Laser Not Working:
- Check if the laser function is enabled via the dedicated button.
- Ensure the battery has sufficient charge.
10. User Tips
- For highly reflective surfaces, consider applying a piece of masking tape or flat black paint to the surface and measuring the temperature of the tape/paint. Remember to adjust emissivity accordingly.
- Always allow the thermometer to stabilize to ambient temperature before taking critical measurements, especially when moving between environments with significant temperature differences.
- The K-type thermocouple is ideal for measuring internal temperatures or for verifying surface temperatures where emissivity adjustments might be challenging.
11. Warranty and Support
This product typically comes with a 1-year warranty. For specific warranty details and technical support, please contact the seller or manufacturer directly.
For any questions or support, you may contact:
- WhatsApp: +86 15232153826
- Email: shangiB2@163.com
A user manual in PDF format may also be available for download. Please check the product page or contact support for the link: User Manual (PDF)