Eigenschaften
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The CA 1823 from Chauvin Arnoux is a compact contact thermometer with integrated data logger function, specifically designed for use with resistance sensors of type Pt100 and Pt1000. It is suitable for stationary and mobile measurement tasks where precise and reliable temperature monitoring is required. The device features a large illuminated digital display, which is easily readable even in poor lighting conditions, and offers functions such as Min/Max display, HOLD, and the option for manual or programmed recording of measurement values. Measurement data can be transferred via USB or Bluetooth to a PC or Android device, with configuration and evaluation performed using the Data Logger Transfer software.

Applications
This thermometer is suitable for applications in industrial, technical, and scientific environments where continuous temperature measurements are required. Typical use cases include monitoring of machines, process plants, cooling systems, or in quality control. The integrated magnetic holder allows flexible mounting on metallic surfaces, making the device suitable for mobile applications as well. Compatibility with Multifix accessories further expands mounting options.

Functions and Equipment in Detail
The device features a single input for Pt100 and Pt1000 sensors. The measurement range covers -100 °C to +400 °C (equivalent to -148 °F to +752 °F), with a resolution of 0.1 °C and 0.1 °F. Accuracy is ± (0.4 % of displayed value + 0.3 °C), ensuring high measurement reliability. Functions include display of minimum and maximum values, HOLD function, and configurable alarms. A visual warning is triggered on the device when a set threshold is exceeded. Recording can be started manually or automatically when an alarm threshold is reached.

Technology Explained Simply
The data logger stores up to 1 million measurement points, enabling long-term data acquisition without frequent data retrieval. Autonomy is 800 hours in portable mode and up to 3 years in recording mode with a storage interval of 15 minutes. Power supply is via 3 alkaline batteries (type LR6) or rechargeable NiMH batteries. An optional mains connection is available via a power adapter or Micro-USB. The housing has IP54 protection rating, providing dust and splash water protection, and allows use in outdoor or humid environments. The operating temperature of the device is between -10 °C and +60 °C at a relative humidity of 10 to 90 %.

Compatibility and Accessories
The CA 1823 is equipped with a 3-pole sensor connector with flat pin, suitable for connecting Pt100 and Pt1000 probes. Available accessories include various sensors, such as the SP14 for general applications, the SP13 for liquids, the SP12 as air sensor, the SP10 as spring-loaded surface sensor, and the SP11 as needle sensor. Additional accessories include a fast charging set, a transport case, a transport bag, a USB power adapter, a shock protection sleeve, and a Bluetooth BLE / USB modem for PC. The DataView software supports evaluation of measured data.

Mounting and Installation
The integrated magnetic holder allows easy mounting on metallic surfaces. The device is also compatible with the multifunctional magnetic holder Multifix, enabling flexible mounting at various locations. Operation is performed via an intuitive button interface, where each button is assigned to a specific function. The display is illuminated, ensuring values are clearly visible even in dark environments.

Advantages in Operation
The long battery life and large storage capacity enable continuous data acquisition over extended periods without maintenance. The ability to configure alarms and automatically start recording when a threshold is reached increases monitoring efficiency. The USB and Bluetooth interfaces, along with the PC software Data Logger Transfer, simplify data transfer and evaluation. Compliance with standards IEC 61010-1 and IEC 61326-1 ensures safety and functionality of the device in industrial environments.