This document is the Baker Hughes ATEX safety guide for the 12400 series liquid level transmitter/controller
The Baker Hughes 12400 Series Level Transmitter/Controller is designed for use in potentially explosive atmospheres, complying with ATEX 2014/34/EU and EMC 2014/30/EU directives. It is certified for use in gas or dust explosive atmospheres (groups IIA, IIB, IIC, IIIC) under specific protection modes (ia, db, tb) and categories (II 1GD, II 2GD). The device must be installed, used, and maintained by qualified professionals in accordance with relevant regulations and site-specific safety rules.
The document details the operation, numbering system, technical specifications, and electrical connection requirements for the 12400 series. It covers intrinsic safety and flameproof markings, assembly, setup, calibration, and maintenance procedures. Key performance metrics include an accuracy of ±0.5%, hysteresis of ±0.3%, and repeatability of ±0.2%. The manual also specifies allowable voltage supplies and maximum power limits for various output types.
| Accuracy | ± 0.5 % |
|---|---|
| Hysteresis | ± 0.3 % |
| Repeatability | ± 0.2 % |
| Dead zone | ± 0.1 % |
| Ambient temperature range (operation) | -50°C to +80°C |
| Storage and transport temperature range | -50°C to +93°C |
| Water ingress protection | IP66/67 |
| Maximum Power | 3 W |
| AO_1 et AO_2 Output Current | 3.8 mA to 20.5 mA |
| DO_1 et DO_2 Maximum Current | 1A |
It is certified for gas or dust explosive atmospheres, groups IIA, IIB, IIC and IIIC.
It is the end user's responsibility to verify material compatibility with the application.
The maximum power allowed inside the 12400 housing is 3 W.
The accuracy of the 12400 Series is ± 0.5 %.