Define the control and instruments used and what their use in the following CEDI P&ID DIagram?

please reference your answers

PI = Pressure Indicator

FAL = Flow Alarm Low

FE = Flow Element

FI = Flow Sensor/Indicator

AE = Element Analyzer

AI = Analyzer Indicator

RT = Resistivity Meter

Please do NOT SPAM WILL BE REPORTED. i will like for a decent answer Please just define some instrument and their use thanks

FAL 1 DC power controller(s) FI AI 1 PI ......... FE AE PI 3 CEDI feed (RO permeate) HI HV1 FAL HV4 SV1 Dilute compartments SV2 FI Product FE PI PI 4 Concentrating compartments HV2 HV3 CEDI Module(s) Reject Figure 7.7 Typical CEDI system P&ID Table 7.3 Required Controls & Instrumentation Process Stream Controls and Instrumentation Dilute (product) Flow rate monitor and low flow alarm Inlet pressure, outlet pressure Inlet conductivity, outlet conductivity Inlet and outlet sample valves Flow rate monitor and low flow alarm Inlet pressure, outlet pressure Inlet and outlet sample valves Throttling valve (inlet side) Concentrate (reject)