iButton Temperature Loggers with 8KB Data-Log Memory

The iButton® temperature loggers (DS1922L/T) are rugged, self-sufficient systems that measure temperature and record the result in a protected memory section. The recording is done at a user-defined rate. A total of 8192 8-bit readings or 4096 16-bit readings taken at equidistant intervals ranging from 1s to 273hrs can be stored. In addition to this, there are 512 bytes of SRAM for storing application-specific information and 64 bytes for calibration data. A mission to collect data can be programmed to begin immediately, or after a user-defined delay or after a temperature alarm. Access to the memory and control functions can be password protected. The DS1922L/T is configured and communicates with a host computing device through the serial 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1922L/T is factory-lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel package is highly resistant to environmental hazards such as dirt, moisture, and shock. Accessories permit the DS1922L/T to be mounted on almost any object, including containers, pallets, and bags.

While all iButton data loggers are calibrated/validated against NIST traceable reference devices, Analog Devices offers a web application to generate validation certificates for the DS1922L/T data loggers. Input is an iButton registration number (or list of numbers) and the output is a validation certificate in PDF format.

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Applications

* High-Temperature Logging (Process Monitoring, Industrial Temperature Monitoring)

* Temperature Logging in Cold Chain, Food Safety, Bio Science, and Pharmaceutical and Medical Products

* High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record

* Temperature Accuracy of ±0.5°C from -10°C to +65°C (DS1922L), ±0.5°C from +20°C to +75°C (DS1922T), with Software Corrections

* Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution

* Operating Temperature Range: DS1922L: -40°C to +85°C; DS1922T: 0°C to +125°C

* Automatically Wakes Up, Measures Temperature, and Stores Values in 8kB of Data-Log Memory in 8- or 16-Bit Format

* Sampling Rate from 1s Up to 273hr

* Programmable High and Low Trip Points for Temperature Alarms

* Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point

* 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory

* Two-Level Password Protection of All Memory and Configuration Registers

* Individually Calibrated in a NIST-Traceable Chamber

* Complies to Standard EN12830

* Rugged Construction Survives Harsh Environments

* Water Resistant Enclosure (IP56) or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant 3 ATM Requirements)

* CE, FCC, and UL913 Certifications

* Simple Serial Port Interfaces to Most Microcontrollers for Rapid Data Transfer

* Communicates to Host with a Single Digital Signal Up to 15.4kbps at Standard Speed or Up to 125kbps in Overdrive Mode Using 1-Wire Protocol

* Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function