BASIC ANALYZER OPERATION
Chapter 4
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Sievers TOC-R3 Operation and Maintenance Manual
DLM 95000-01 EN Rev. A 97 © Veolia 2023
POC/VOC
The Analyzer determines the POC/VOC content in a sample using an optional
Photoionization Detector (PID) with an energy level of less than 10.6 eV (PID) in the
gas stream. The PID specifically measures the contained POCs/VOCs. To measure the
POC/VOC content, the sample is loaded into the Multi-Function Sample Vessel (MFSV),
mixed with acid, and then stripped. The escaping volatile organic carbon compounds are
measured by a PID Detector.
TNb
The analysis of Total Nitrogen Bound or Total Bound Nitrogen (TNb) also requires a
thermal oxidation process. The bound Nitrogen is converted into Nitric Oxide (NO), which
can be determined with an optional Electrochemical Detector (ECD). A high oxidation
temperature of 1,200 °C (2192 °F) combined with a short residence time in the reactor
favors the reaction of very different Nitrogen components to form NO.
POWERING ON AND OFF THE ANALYZER
This section provides the following instructions:
• “To Power ON the Analyzer” on page 97
• “To Shut Down the Analyzer” on page 98
• “To Power Cycle the Analyzer” on page 99
Powering on and off the Analyzer
To Power ON the Analyzer
1. Locate the Rotary Power Switch on the right side of the Analyzer. See Figure 4-1 on
page 98.
Warning
To avoid injury and to ensure accurate analysis results, ensure that the Analyzer
door is closed and latched during normal operation.
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