12LS Controller Installation and Operation Manual, Rev 3 ... - Watlow

The low input reading is referenced to 60mV and is calculated using this equation: (see section 3.3.6)(Sensor Output @ Low PV)LOW RDG = (1000) * ------------------------( 60mV )Press YES to select the menu or NO to advance to the next menu.Press UP and DOWN to set the low reading.Press ENTER to store the value or BACK to return to the SETUP LOOP INPUT main menu prompt.Linear Input Scaling Example:PROBLEM: We want to connect a pressure sensor to enable us to read pressure directly in PSI. The sensor has anoutput of 4-20mA over a range of 100-400PSI. The 4-20mA is converted to 12-60mV (see section 3.3.6 and 3.3.7)d.How do we set the input scaling?SOLUTION: 1. Set the HIGH PV to 400 and enter the units as P, S,and I.2. Calculate the HIGH RDG and enter it:(60mV)