Tera DLT-20 Manual

Wireless logger, recorder with built-in modem for data transmission to a cloud server

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(RECORDER WITH BUILT-IN MODEM

FOR DATA TRANSMISSION TO A CLOUD SERVER)

DLT-20 Wireless Temperature Logger

DLT-20-Pt Wireless Temperature Logger with External Temperature Probe

DLT-20-2Pt Wireless Temperature Logger with Two External Temperature Probes

DLT-21 Wireless Humidity and Temperature Logger

DLT-21-Pt Wireless Humidity and Temperature Logger with Two External Temperature Probes

Ukraine, 14030, Chernihiv,

Vsykhsvyatska St., 7

WIRELESS LOGGER

MANUAL

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 MANUAL DLT-20 Wireless Temperature Logger DLT-20-Pt Wireless Temperature Logger with External Temperature Probe DLT-20-2Pt Wireless Temperature Logger with Two External Temperature Probes DLT-21 Wireless Humidity and Temperature Logger DLT-21-Pt Wireless Humidity and Temperature Logger with Two External Temperature Probes Ukraine, 14030, Chernihiv, Tel: (0462) 606-740, 606-840 Vsykhsvyatska St., 7...
Page 2 Contents 1. DESCRIPTION AND OPERATION ......................... 1.1. Purpose ............................1.2. Main Technical Specifications ...................... 1.3. Additional Technical Specifications ....................1.4. Delivery Set ..........................1.5. Device and Principle of Operation ....................1.6. Description of Control Elements and Indicators Functions ............2. WORKING WITH ARCHIVAL DATA AND LOGGER SETTINGS ..............2.1.
Page 3 This operating manual is intended to familiarize the service personnel with the operating principle, design, and characteristics of the wireless logger DLT-20 (-21) and its modifications DLT-20-Pt, DLT-20-2Pt, DLT-21-Pt (hereinafter referred to as the logger), as well as its components. The manual also provides in- structions necessary for the correct and safe operation, storage, and transportation of the logger.
Page 4 Table 1.2. Technical Specifications of the DLT-20-Pt and DLT-20-2Pt Logger Modifications. Parameter Name Value Number of Temperature Sensors: • DLT-20-Pt • DLT-20-2Pt Type of Temperature Probe Pt1000 Temperature Measurement Range, °C -100…500 Length of Sensor Connection Cable, m (max) Absolute Temperature Measurement Error, °C ±0,4+0,002|t|...
Page 5 Table 1.4. Technical Specifications of the DLT-21-Pt Logger. Parameter Name Value Number of humidity and temperature measurement sensors Type of humidity and temperature measurement sensor SHT31 Humidity measurement range Rh, % (without moisture condensation) 0…100 (see p. 7.3) Temperature measurement range of the humidity and temperature measurement sensor, °C •...
Page 6 1.3. Additional Technical Specifications 1.3.1. In the absence of connectivity, archiving is performed cyclically or until the logger’s memory is full. Once connectivity is restored, archived data is transmitted to the cloud, and memory becomes available for recording again. With connectivity, the logger transmits data to the cloud server once during each archiv- ing period (if the charger is connected) or once every 30 minutes (if the charger is not connected).
Page 7 Figure 2. Battery Discharge Graph for the Logger in Low-Temperature Configuration. 1.4. Delivery Set The supply package of the logger includes: Wireless logger ..........................1 pc. Charging device ..........................1 pc. Passport ............................1 copy User manual ........................... 1 copy Instructions for accessing the special application ................
Page 8 1.5. Device and Principle of Operation 1.5.1. The appearance and dimensions of the logger are shown in Figure 3. DLT-20 DLT-20-Pt DLT-20-2Pt DLT-21 DLT-21-Pt Side view Protective cover 45,3 45,3 45,3 45,3 45,3 108,2 95,4 95,4 95,4 95,4 95,4 29,15...
Page 9 1.6. Description of Control and Indicator Functions 1.6.1. Two LEDs are used to indicate the status of the logger. Their functions are shown in Table 3. Table 3. Description of LED reactions and their meanings. Indication Purpose Green flashing Data exchange over the network Left flashing Loss of network connection...
Page 10 Table 6. Archiving status display. Icon Meaning Archiving in progress Archiving not in progress, can be manually enabled via buttons or application Awaiting scheduled archiving start time Archiving start delayed Відсутня Archiving not in progress, can only be enabled via application Table 7.
Page 11 Below the status line, 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 display of measurement results is implemented across two pages.
Page 12 The service information screen (Figure 5) displays the logger’s serial number (SN), software version (ver.), and certification date (Sert.). Figure 5. Service Information Screen. When manually starting/stopping archiving, the display shows a graphical confirmation of the actions performed. The message “Button action isn’t allowed” indicates that starting/stopping archiving using the buttons is not possible (see section 2.2).
Page 13 2.2. Archiving Modes When a connection is available, archive data is periodically transmitted to the cloud, so the logger’s memory remains continuously available for new archive data. In this case, there is no data loss, so the ar- chiving mode set does not matter. Data will be lost if there is no connection for longer than the memory fill time.
Page 14 2.7. Functionality of Control Buttons The use of the logger buttons for displaying measurement results, indicating alarms, displaying service information, turning the connection on/off, and enabling/disabling storage mode is always available. The ability to use the logger buttons for starting/stopping archiving and activating/deactivating the alarm depends on the archiving start mode and button control mode.
Page 15 4. LABELING The following information must be indicated on the logger’s casing: • Trademark of the manufacturer • Model designation • Serial number (may be stored in internal memory) • Date of manufacture: month, year • Compliance mark with Technical Regulations (if applicable) 5.
Page 16 8. MAINTENANCE The logger should undergo maintenance at least once every three months. During maintenance: remove dust and dirt; check the quality of external sensor connections. The battery should be replaced every three years with a new one. ATTENTION! After replacing the battery, ensure a connection for time synchronization. Periodic calibration of the logger is recommended.

This manual is also suitable for:

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