Sensor pH Meter Electrode BNC Connector dan Modul pH Meter PH-4502C

p Module Specs : Heating voltage: 5V +- 0.2V (AC DC) Working current: 5-10mA Detectable concentration range: PH0-14 Detection Temperature range: 0-80 Response time: 5S Settling Time: 60S Component Power: 0.5W Working temperature: -10 ~ 50 (nominal temperature 20 ) Humidity: 95% RH (nominal humidity 65% RH) Module Size: 42mm 32mm 20mm Output: analog voltage signal output With 4pcs M3 Mounting Holes p Measurement range: 0.00~14.00 PH Zero-point: 7 +- 0.5PH Alkali Error: 0.2PH Theoretical Percentage Slope: 98.5% Internal Resistance: 250M Response Time: 1min Operating Temperature: 0-60C Terminal Blocks: BNC plug Cable length: Approx. 70cm p Sensor Pinout : TO Temperature output DO 3.3V pH limit trigger PO PH analog output Gnd Gnd for PH probe Gnd Gnd for board VCC 5V DC p POT 1 Analog reading offset (Nearest to BNC connector) POT 2 PH limit setting p Calibration. This board have the ability to supply a voltage output to the analogue board that will represent a PH value just like any other sensor that will connect to an analog pin. Looks like PH=0 should be presented by 0V output and a PH=14 to represent 5V, but NO Neutral PH=7 set to 0V, this means that the voltage will go into the minuses when reading acidic PH values and obviously cannot be read by the analog Arduino port. The offset pot is used to change this so that a PH=7 will read the expected 2.5V to the Arduino analog pin, the analog pin can read voltages between 0V and 5V hence the 2.5V that is halfway between 0V and 5V as a PH=7 is halfway between PH 0 and PH 14. You will need to turn the offset potentiometer to get the right offset, the offset pot is the blue pot nearest to the BNC connector. p To set the offset is fairly easy. Disconnect the probe short-circuit the BNC connector. Use your multimeter to adjust the offset potentiometer until PO measures 2.5V Done p Wiring diagram PO = gt; Arduino A0 VCC = gt; SKU : 3131/1398885698818752512/55