Review Paper on ph Transmitter Showing Control Functionality
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 3
Abstract
pH is short form for the Power (p) of Hydrogen (H). pH is defined as the negative log of the Hydrogen activity, aH+ or the effective ion concentration. pH is a unit of measure which describes the degree of acidity or alkalinity of a solution. A more effective way to measure pH in an industrial setting is the potentiometric method of pH analysis. Online, continuous measurement method allows the potentiometric method. and Potentiometric analysis involves four parts like sample, sensing ph electrode, electrode reference and amplifier/readout signal. When properly combined the result is accurate, representative pH readings. The pH sensor components are usually combined into one device called a combination pH electrode. Glass is usually used as the measuring electrode. The preamplifier is a signal-conditioning device. The high-impedance pH electrode signal is given to the signal-conditioning device and converts it into a low impedance signal, which is accepted by the transmitter. A transmitter is basically a device, which accepts any measurand and converts that into a standardized transmission signal that is 4 to 20 mA. The signal conditioning process typically involves one or more steps. It involve the steps like isolate , filter & amplify the signal and convert the sensor input signal to a proportional output (4-20mA) signal that is transmitted to another control device or system. To perform this operation PIC controller is used. This paper presents the Industrial pH Transmitter With Control Functionality i.e it adjuses any pH range ( 0-14 pH) and converts that signal into 4 to 20 mA signal.
Authors and Affiliations
Vaishali Kankhare, S. A. Khandekar
Keywords
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