Smart pH sensor and transmitter for diagnostic applications
Schneider Electric’s Foxboro PH10 smart sensor and 876PH smart transmitter combine a rugged polyvinylidene difluoride (PVDF) body with enhanced smart capabilities. The devices can be calibrated at any time against a "standard" or "reference" transmitter, or laptop PC, in the instrument shop. The calibration parameters are then stored in an on-board memory chip. When performing a field calibration, operators simply take the pre-calibrated smart sensor to the field, connect it to the transmitter, and allow the transmitter to upload the calibration parameters.
Additional PH10 smart sensor features include a flat membrane sensing electrode, and Nafion ion barrier to protect the internal reference and reduce fouling. The sensor stores other parameters, such as glass resistance, reference resistance, date of manufacture, serial number, sales order number, and history logs to help manage the deployment and performance of the pH sensor. The sensor can be calibrated with a PC using an interface cable and field device tool group certified software. The sensor also incorporates digital technology. The pH and temperature signals are converted from analog to digital in the sensor body through the use of on-board electronics. The electronics also provide memory so that the pH calibration can be stored in the sensor.
The 876PH smart transmitter features include sensor and transmitter diagnostics. Sensor faults such as broken glass and coated reference are continuously checked. This feature allows maintenance to be better managed, reducing costs and ensuring asset availability. They also have save and restore configurations. Up to two unique configuration profiles can be saved, facilitating a quick and easy change to save operator time and costs.
– Edited by CFE Media. See more Control Engineering process sensor and actuator products.