This is the user manual for WIKA NI-223E Compact Differential Pressure Switches Series DC & DE, covering installation, calibration, and troubleshooting.
This document serves as the user manual for the WIKA NI-223E series of compact differential pressure switches. It provides comprehensive instructions on operating principles, model coding, identification plates, setpoint adjustment, and calibration procedures.
The guide also details safety requirements, including Safety Integrity Level (SIL) installation standards, proper piping connections, commissioning steps, visual inspections, functional verification, shutdown protocols, disposal methods, and troubleshooting tips for the device. This manual is written in Chinese.
For models DCC and DEC, air or other gases must be used for calibration because they are designed for clean gas or non-condensing steam.
The pressure switch must be installed in its normal position, which means the pressure connection must face downwards.