FLOW PATH COMPONENTS
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Sievers TOC-R3 Operation and Maintenance Manual
DLM 95000-01 EN Rev. A 44 © Veolia 2023
The "raw" ECD Detector signals are displayed as “NO in ppm” and the concentrations of
TNb are displayed in “mg/L”.
To verify your purchased ECD Detector variation, go to the Menu → General → Machine
Configuration screen and refer to Table 2-2, “Typical ECD Detector Measuring Ranges,”
on page 44.
B2
5
— PID Detector Option (for POC/VOC Detection)
The PID Detector Option (B2) is a purchasable Photoionization Detector (PID) Feature
located in the Carrier Gas stream after the NDIR Detector and the “Carrier Gas Flow Out”
Sensor. The PID Detector is used to measure POC/VOC (Purgeable/Volatile Organic
Carbon).
First, Sample is loaded into MFSV. If running using the TOC or IC Method, the sample is
also acidified whilst measuring POC/VOC. If running using the NPOC/TC Method, then
the sample is not acidified
. To measure POC/VOCs, the inner glass MFSV Capillary Tube
of the Multi-Function Sample Vessel (CM2) is fully lowered to minimize the volume that is
being stripped out. During the stripping process, Carrier Gas is introduced from Y10 into
the Multi-Function Sample Vessel (CM2). The stripping gas is then conveyed through the
Gas Cooler Unit and passes through Y12, Y11, HS2, HS3, and HS4 before reaching the
PID Detector. The stripping process terminates when the Customer defined POC/VOC
integration is completed. After the stripping is completed, the remaining sample is
transferred to the Injection Block to measure the TC or NPOC, depending if sample was
acidified prior to sparging.
This Method allows for direct measurement of the stripped-out portion of the POC/VOC,
which can be included in the TOC Value (TOC add) or reported separately. The rate at
which POCs/VOCs are stripped out of solution depends on many factors including
Table 2-2: Typical ECD Detector Measuring Ranges
Purchased
Optional
Detector
ECD Detector Ranges
NO [ppm]
(Firmware Label)
a
a. “TNb Range” value is found on the Menu → General →
Machine Configuration Screen.
TNb [mg/L]
(Analytical Range)
Up to 150 mg/
L as TNb
100 1 – 150
Up to 1,500
mg/L as TNb
1,000 5 – 1,500
5. “B2” can either be the optional PID Detector or the optional ECD Detector. The Analyzer
cannot be configured with both options.
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