TEKCOPLUS THTK-6 4-Channel K-Type Thermocouple Thermometer Data Logger Instruction Manual

1. Introduction

This manual provides detailed instructions for the operation and maintenance of your TEKCOPLUS THTK-6 4-Channel K-Type Thermocouple Thermometer Data Logger. This device is designed for precise temperature measurement and data logging across four independent channels, making it suitable for various industrial, HVAC, laboratory, and warehouse applications. Please read this manual thoroughly before using the device to ensure proper function and safety.

Figure 1: The TEKCOPLUS THTK-6 Data Logger is versatile for industrial, HVAC, laboratory, and warehouse environments.

2. Product Overview

2.1 Key Features

• 4-Channel K-Type Thermocouple Input: Simultaneously measure temperatures from four independent K-type thermocouples.
• Wide Temperature Range: Measures temperatures from -200 to 1370°C (-328 to 2498°F) with high accuracy. Included K-type probes measure -50 to 200°C (-58 to 392°F).
• Data Logging Functionality: Records temperature data to an 8GB SD card for easy transfer and analysis.
• Large LCD Display: Features a backlit display showing all four readings, real-time date, and clock.
• Alarm Function: Includes audible (buzzer) and visual (LED flash) alarms with adjustable limits for each channel.
• Max/Min/Hold Function: Allows for easy retrieval of maximum, minimum, and current readings.
• Adjustable Temperature Offset: Compensate for sensor deviations with an adjustable range of -12°C to +12°C.
• Selectable Units: Switch between Celsius (°C) and Fahrenheit (°F).
• Auto Power-Off: Automatically powers off after 20 minutes of inactivity to conserve battery life.

2.2 Package Contents

• 1 x TEKCOPLUS THTK-6 4-Channel K-Type Thermometer SD Logger
• 2 x K-Type Thermocouple Probes
• 1 x 8GB SD Card
• 4 x AA Batteries
• 1 x English Operation Manual (printed)

Figure 2: The complete set includes the data logger, two K-type thermocouples, an 8GB SD card, and batteries.

3. Safety Information

To ensure safe and reliable operation, please observe the following safety guidelines:

• Do not expose the device to extreme temperatures outside the specified operating range (0 to 50°C).
• Avoid high humidity environments (below 80% RH operating, below 90% RH storage).
• Do not immerse the device in water or any other liquid. The product care instructions state "Do Not Soak."
• Use only K-type thermocouples with this device.
• Ensure proper battery installation and replacement.
• Keep the device away from strong electromagnetic fields.
• Handle the SD card and battery compartment covers with care to prevent damage.

4. Setup

4.1 Battery Installation

1. Locate the battery compartment on the back of the device.
2. Open the battery cover.
3. Insert four AA batteries, observing the correct polarity (+/-).
4. Close the battery cover securely.

4.2 Thermocouple Connection

1. Identify the four K-Type input terminals at the bottom of the device, labeled CH1, CH2, CH3, CH4.
2. Connect your K-type thermocouple probes to the desired channels. Ensure the polarity of the thermocouple connector matches the input terminals.

Figure 3: Front and bottom view of the data logger with labeled components, including K-Type terminals.

4.3 SD Card Insertion

1. Locate the SD card slot on the side of the device.
2. Insert the provided 8GB SD card into the slot until it clicks into place.

5. Operation

5.1 Power On/Off

• Press the ON/OFF button to power on the device.
• Press and hold the ON/OFF button to power off the device. The device also features a 20-minute auto power-off function.

5.2 Basic Measurement Display

Upon powering on, the LCD will display real-time temperature readings for all connected K-type thermocouples (CH1-CH4), along with the current date and time.

5.3 Unit Selection (°C/°F)

To switch between Celsius (°C) and Fahrenheit (°F), refer to the device's menu settings. Typically, this is accessed via the REL/SET or ENTER button in conjunction with navigation buttons.

5.4 Max/Min/Hold Function

• Press the MAX/MIN HOLD/T1-T2 button once to display the maximum temperature recorded since power-on.
• Press it again to display the minimum temperature.
• Press it a third time to return to real-time readings.
• To hold the current readings on the display, press and hold the MAX/MIN HOLD/T1-T2 button until "HOLD" appears. Press again to release.

5.5 Setting Date and Time

Access the menu settings (usually by pressing and holding REL/SET or ENTER) to navigate to the date and time adjustment options. Use the navigation buttons (often integrated with MAX/MIN and HOLD/T1-T2) to adjust values and ENTER to confirm.

Video 1: Overview of the TEKCOPLUS 4-Channel K-Type Thermocouple Thermometer Data Logger's features and basic operation.

6. Data Logging and SD Card

6.1 Starting and Stopping Data Logging

• To begin continuous data logging, press the REC button. The "REC" indicator will appear on the display.
• To stop logging, press the REC button again.
• The device also supports manual data saving by pressing the MEMO button.

6.2 Setting Sampling Interval

The sampling interval (how often data is recorded) can be adjusted in the device's menu settings. Intervals typically range from 1 second to 10 minutes. Consult the printed manual for specific navigation steps.

6.3 Accessing Logged Data

1. Power off the device.
2. Carefully remove the SD card from its slot. You may need a tool like needle-nose pliers if the slot is recessed.
3. Insert the SD card into a compatible card reader connected to a computer.
4. The data is saved as a text (.txt) file. This file can be opened and processed using spreadsheet software for analysis.

Figure 4: The data logger uses a standard SD card for data storage, allowing for easy transfer to a computer without special software.

7. Calibration and Offset Function

The device features an adjustable temperature offset function to compensate for minor sensor deviations or to fine-tune readings for calibration accuracy. The adjustable range is -12°C to +12°C.

1. Access the menu settings (refer to the printed manual for specific button sequences).
2. Navigate to the offset adjustment option for each channel (CH1-CH4).
3. Use the navigation buttons to set the desired offset value.
4. Confirm the setting with the ENTER button.

Figure 5: The adjustable temperature offset function allows for fine-tuning of readings.

8. Alarms

The TEKCOPLUS THTK-6 is equipped with an audible beeper and a bright flashing red LED alarm system. These alarms activate when temperature measurements exceed preset high or low limits for any channel.

8.1 Setting Alarm Limits

1. Access the menu settings to find the alarm configuration options.
2. Select the desired channel (CH1-CH4) to set its independent high and low alarm limits.
3. Use the navigation buttons to adjust the high and low temperature thresholds.
4. Confirm the settings with the ENTER button.

Figure 6: The device features an audible beeper and a flashing LED for alarm indications.

9. Specifications

Figure 7: The device features four K-Type thermocouple inputs and a wide measurement range.

10. Troubleshooting

If you encounter issues with your TEKCOPLUS THTK-6, refer to the following common problems and solutions:

• Difficulty Understanding Instructions: The included printed manual may have small text or translation nuances. Search online for "TEKCOPLUS THTK-6 manual" or "88598 4ch K SD Logger manual" for potentially clearer or larger versions.
• SD Card Removal Issues: The SD card slot can be recessed, making manual removal difficult. If the card does not eject sufficiently, use a pair of needle-nose pliers to gently pull it out after pressing to eject.
• Display Goes Blank During Data Logging: This is a design feature to conserve battery power. The unit will stop displaying real-time readings when continuous data logging is active. If real-time display is critical during logging, consider using an external 9V DC power supply, though some users report the display may still go blank even with external power.
• Inconsistent Data Format on SD Card: The logged data (.txt file) may use inconsistent spacing between values instead of a standard CSV format. This may require custom parsing or careful import settings in spreadsheet software to correctly separate data columns.
• Measurement Inaccuracy or Channel Discrepancies:
  • Ensure thermocouples are correctly connected and not damaged.
  • K-type thermocouples have a standard accuracy tolerance (e.g., ±1.5°C near room temperature). The included probes may have varying accuracy.
  • Utilize the adjustable temperature offset function (Section 7) to fine-tune readings if a consistent deviation is observed against a known standard. Note that if the error is non-linear across the temperature range, a single offset may not fully correct it.
  • Test the device and probes against a known, stable temperature source (e.g., ice bath) to verify accuracy before critical measurements.
• Device Not Powering On: Check battery installation and ensure batteries have sufficient charge. If using an external power supply, verify it meets the 9V DC, 0.9A specification with correct polarity (Outside = (-), Inside = (+)).

11. Maintenance

• Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Do not soak the device in water.
• Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the device within the specified storage conditions (-20 to 50°C, <90% RH).
• Thermocouple Care: Inspect thermocouple probes regularly for signs of wear or damage. Replace damaged probes to ensure accurate readings.

12. Warranty and Support

For warranty information or technical support, please refer to the documentation included with your purchase or contact TEKCOPLUS customer service directly. Contact details can typically be found on the manufacturer's website or through your point of purchase.