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Vct Case Study
- 1. Conmark Systems-Instruments 1-770-300-0224 miia@conmark.com www.conmark.com The Satron VCT transmitters offer unsurpassed performance in a broad range of pulp and paper applications, meeting your accuracy requirements in real process environment. The unique measuring probe design of the VCT combined with the latest high end electro-optical components ensures that the signal-to-noise ratio can be kept very high at all times, in all applications. The unique measuring probe design of the VCT combined with the latest high end electro-optical components ensures that the signal-to-noise ratio can be kept very high at all times, in all applications. The high signal-to-noise ratio gives the transmitter the ability to produce excellent and accurate results virtually independent of process variables (process pressure, air, flow rate, color, brightness, conductivity) and the ability to withstand ash fluctuations. Washer Feed Consistency After Delignification Figure below shows the VCT compared to a blade and rotary. As seen the optical is up for the task. When comparing rotating technology and optical, the following can be said: • Rotary requires service were as optical is service free. • Rotary is heavy on installation cost, sealing water, 3-phase power, etc. Optical is not. • Rotary requires a shut down if it fails. Optical can be removed even if the process is running. • Optical can be mounted closer to the pump to minimize any delay in dilution loop. Bleach Plant Feed Consistency In this case, the mill had tried a rotary and a blade without success. They ended up with a leading manufacturers optical consistency meter, which they have been happy with since 2004. Recently they gave Satron an opportunity to compare a VCT next to their existing optical meter and the results are shown in Figure above. The difference between the VCT and the existing meter is only ±0.1 %Cs and easily falls within the lab testing error. In other words, the VCT performed as well as the existing optical transmitter.