General Description

The DS1922L/DS1922T temperature logger iButtons® are systems that measure temperature and record the result in a protected memory section. Their upside being that they are rugged and self-sufficient. 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 273hr, can be stored. Additionally, 512 bytes of SRAM store application-specific information and 64 bytes store calibration data. A mission to collect data can be programmed to begin immediately, after a user-defined delay, or after a temperature alarm. Access to the memory and control functions can be password protected. The DS1922L/DS1922T are configured and communicate with a host-computing device through the serial 1-Wire® protocol, which requires only a single data lead and a ground return. Each DS1922L/DS1922T 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/DS1922T to be mounted on almost any object, including containers, pallets, and bags.

Features

♦ Automatically Wakes Up, Measures Temperature, and Stores Values in 8KB of Data-Log Memory in 8-Bit or 16-Bit Format
♦ Digital Thermometer Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
♦ 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
♦ Water Resistant or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant 3 ATM Requirements)
♦ 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
♦ Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function
♦ 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory
♦ Two-Level Password Protection of All Memory and Configuration Registers
♦ 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
♦ Operating Temperature Range: DS1922L: -40°C to +85°C; DS1922T: 0°C to +125°C

Common iButton Features

♦ Digital Identification and Information by Momentary Contact
♦ Unique Factory-Lasered 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Traceability Because No Two Parts Are Alike
♦ Built-In Multidrop Controller for 1-Wire Net
♦ Chip-Based Data Carrier Compactly Stores Information
♦ Data Can Be Accessed While Affixed to Object
♦ Button Shape is Self-Aligning with Cup-Shaped Probes
♦ Durable Stainless-Steel Case Engraved with Registration Number Withstands Harsh Environments
♦ Easily Affixed with Self-Stick Adhesive Backing, Latched by Its Flange, or Locked with a Ring Pressed Onto Its Rim
♦ Presence Detector Acknowledges When Reader First Applies Voltage
♦ Meets UL 913 (4th Edit.); Intrinsically Safe Apparatus: Approved Under Entity Concept for Use in Class I, Division 1, Group A, B, C, and D Locations

Applications

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

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

Temperature Logger iButton with 8KB Data-Log Memory