- The forward light scatter sensor within the PCME QAL 182 WS uses a low-angle forward light scattering measurement principle unique to PCME (see ProScatter™ Forward Scatter). The measured ‘cone’ of scattered light is larger than in typical light scatter instruments, which provides:
+ Excellent sensing resolution and sensitivity, due to an increased signal-to-noise ratio
+ Reduced cross-sensitivity to changing particle size, allowing a greater range of applications for which the instrument is suitable
- Flow rates and heater temperatures are continually monitored in the extractive flow line, to ensure any sample line blockages or problems with insufficient heating are automatically detected and avoided. The system automatically indicates when valid measurements are occurring, hence avoiding any measurement errors during any system warm up. In addition, trace heaters may be added to the intake air to ensure there is no risk of condensation in the pipes.
- The system has been designed to facilitate ease of maintenance and cleaning of all major components, and the central control system records all critical measurements for rapid diagnosis of problems. The system can be isolated from the stack with a safety shut off valve and the vaporising chamber is easily accessed and cleaned by opening the hinged heater cover.
- The PCME QAL 182 WS is designed in a truly modular format for safety and ease of installation and maintenance, allowing parts to be replaced while still mounted on the stack.
- As an approved Particulate Measurement System for compliance monitoring, the forward light scatter sensor within the PCME QAL 182 WS has fully automated self checks (Zero and Span) with a dedicated audit channel for QA data logging. This enables a simplified process for operators to meet QAL3 standards, with the option of PCME’s QAL Reporter PC software for automated QAL3 reporting in full compliance with EN 13284-2.
- In addition to automatic self checks, the PCME QAL 182 WS has been designed for easy and safe operator access to the measurement volume for external auditing as required for the AST linearity test for EN 14181 compliance. The ProScatter™ 5-point Filter audit unit facilitates a comprehensive instrument check via a 5 point linearity check.