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Tera DLT-20 User Manual

Gsm-logger (recorder with a built-in gsm modem for data transfer to a cloud server)
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(RECORDER WITH A BUILT-IN GSM MODEM
FOR DATA TRANSFER TO A CLOUD SERVER)
DLT-20 GSM temperature logger
DLT-20-Pt GSM temperature logger with an external temperature sensor
DLT-20-2Pt GSM temperature logger with two external temperature sensors
DLT-21 GSM humidity and temperature logger
DLT-21-Pt GSM humidity and temperature logger with two external temperature sensors
Ukraine, 14030, Chernihiv,
St. Vsykhsvyatska, 7
GSM-LOGGER
USER MANUAL
1
Tel: (0462) 606-740, 606-840
e-mail: info@ao-tera.com.ua

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Summary of Contents for Tera DLT-20

  • Page 1 FOR DATA TRANSFER TO A CLOUD SERVER) USER MANUAL DLT-20 GSM temperature logger DLT-20-Pt GSM temperature logger with an external temperature sensor DLT-20-2Pt GSM temperature logger with two external temperature sensors DLT-21 GSM humidity and temperature logger DLT-21-Pt GSM humidity and temperature logger with two external temperature sensors...

  • Page 2: Table Of Contents

    Table of content 1. DESCRIPTION AND OPERATION ........................ 1.1. Purpose ............................1.2. Specifications ..........................1.3. Additional Specifications ......................1.4. Package ............................1.5. Design and operating ........................1.6. Control Functions and Indication ....................2. GSM LOGGER SETUP ..........................2.1. Logging Interval ..........................2.2.

  • Page 3: Description And Operation

    This user manual is intended to familiarize the service personnel with the principle of operation, design, characteristics of the GSM logger DLT-20 (-21) and its modifications DLT-20-Pt, DLT-20-2Pt, DLT-21-Pt (hereinafter referred to as the logger), and its components, as well as provide necessary instructions for correct and safe operation, storage, and transportation.
  • Page 4 Table 1.2. Technical specifications of the logger modification DLT-20-Pt, DLT-20-2Pt. Characteristic Value Number of Temperature Probes: • DLT-20-Pt • DLT-20-2Pt Type of Temperature Probe Pt1000 Temperature Measurement Range Т, °С -100…500 Length of Probe Connecting Cable, m, max Absolute Accuracy of Temperature Measurement, °С...
  • Page 5 Table 1.4. Technical specifications of the logger modification DLT-21-Pt. Characteristic Value Number of Humidity and Temperature Measuring Sensors Type of Humidity and Temperature Measuring Sensor SHT31 Humidity Measurement Range Rh, % (No Condensation) 0…100 (see section 7.3) Temperature Measurement Range by Humidity and Temperature Measuring Sensor Т, °С...

  • Page 6: Additional Specifications

    1.3. Additional Specifications 1.3.1. In the absence of GSM connectivity, archiving is done cyclically in the logger’s memory or until the memory is full. After connectivity is restored, archived data is transmitted to the cloud, and the memory becomes available for recording again. When GSM connectivity is available, the logger transmits data to the cloud server once during the archiving period (if the charger is connected) or once every 30 minutes (if the charger is not connected).

  • Page 7: Package

    Figure 2. Discharge schedule of the logger’s power supply in low-temperature version. 1.4. Package Logger supply kit: GSM logger ............................1 pc Power supply unit ..........................1 pc Passport ............................. 1 pc User manual ............................1 pc User manual for accessing the special application ................1 pc Consumer packaging .........................

  • Page 8: Design And Operating

    1.5. Design and operating 1.5.1. The external appearance and dimensional dimensions of the logger are shown in Figure 3. DLT-20, DLT-21 DLT-20-Pt DLT-20-2Pt DLT-21-Pt Side View Protective case 45,3 45,3 45,3 45,3 108,2 95,4 95,4 95,4 95,4 29,15 51,3 Ø5 Ø5...

  • Page 9: Control Functions And Indication

    1.6. Control Functions and Indication 1.6.1. Two LEDs are used to indicate the logger’s status. Their functions are shown in Table 3. Table 3. Description of LED indications and their meanings. Indication Meaning green Flashing color Data exchange via GSM network Left Flashing color...
  • Page 10 Table 6. Displaying the archiving status. Icon Meaning Archiving is in progress Archiving is not in progress, it can be started manually using the buttons or the program Archiving is scheduled to start at the specified time Archiving start delay Archiving is not in progress, it can only be enabled through the application Table 7.
  • Page 11 Below the status bar, the measurement results for the channels are displayed (Table 9). Temperature measurement channel Humidity measurement channel Table 9. Main screen of the logger. Model First page Second page DLT-20 DLT-20-Pt DLT-20-2Pt DLT-21 DLT-21-Pt DLT-21-Gigro For loggers with more than two measurement channels, the indication of measurement results is implemented on two display pages.

  • Page 12: Gsm Logger Setup

    The service information screen (Figure 5) contains the logger’s serial number (SN), software version (ver.), and certification date (Sert.). Figure 5. Service information screen. When manually starting/stopping archiving, a graphical confirmation of the action taken is displayed on the screen. The message ‘Button action isn’t allowed’...

  • Page 13: Logging Modes

    2.2. Logging Modes If there is a GSM connection available, archival data is periodically transmitted to the cloud, so the logger’s memory is constantly available for recording new archival data. In this case, data loss is not a concern, so the set archiving mode is not relevant. Data will be lost in the absence of a GSM connection for longer than the memory fill time.

  • Page 14: Control Buttons Operation

    2.7. Control Buttons Operation The use of the logger buttons for indicating measurement results, displaying alarms, showing service information, toggling GSM connectivity, and toggling storage mode is always available. However, the ability to use the logger buttons for starting/stopping archiving and enabling/disabling alarms depends on the archiving startup mode and button control mode.

  • Page 15: Labeling

    4. LABELING On the logger’s casing, the following information should be indicated: • Trademark of the manufacturing company • Conditional marking • Serial number (it’s acceptable to indicate it in internal memory) • Date of manufacture: month, year • Compliance mark with the Technical Regulation (if applicable) 5.

  • Page 16: Service

    8. SERVICE Technical maintenance of the logger should be performed at least once every three months. During maintenance: remove dust and dirt; check the quality of connection of external sensors. Every three years, replace the power source with a new one. ATTENTION! After replacing the power source, it is necessary to ensure GSM connectivity for time synchronization.

This manual is also suitable for:

Dlt-20-ptDlt-20-2ptDlt-21Dlt-21-pt

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