Often, Instrumentation technicians like to shorten cables to match the installation. This is strongly discouraged with Analytical Sensors. Yokogawa has designed cables with a special layer of conductive plastic to ensure maximum noise immunity. This layer can be very difficult to remove. If done improperly the shortened cables will often give intermittent problems. They may show noisy signals, signals that jump when the cables are touched or moved, or may not work at all. This is often difficult to diagnose and may lead to customers replacing the entire system because they lose confidence in the integrity of the analyzer. For this reason we recommend that the cables be left at their original length. Any unused cable can be coiled up and immobilized using Plastic Wire-ties or tape to keep it out of the way and prevent wind or weather from causing it to move.
Keep in mind that pH analyzers are measuring a voltage signal through the glass of the pH sensor. This sensor may have over 1,000 MegOhms of resistance. In these conditions the cables must be perfect to keep the voltage signal from leaking away before it reaches the Transmitter. Even the oil from your fingers in the wrong place can short out this signal and cause errors.
Liquid analyzers are used for monitoring process chemistry including water quality, providing process optimization and control.
pH and ORP meters, analyzers and transmitters are used for continuous process monitoring of pH and ORP to ensure water/product quality, monitor effluent discharge, batch neutralization, pulp stock, scrubbers, cooling towers, chemical, water/wastewater treatment and many other applications.
Process analyzers are used to determine the chemical composition or physical properties of substances involved in industrial processes.