AZ 86021 combo pH/EC/DO meter calibration and maintenance

This video contains three parts to explain:
1. Things to check upon receiving brand new 86021 pH/EC/DO meter
2. How to calibrate pH/EC/DO properly
3. How to do pH/EC/DO probe maintenance
♛ 86021 AZ IP67 Combo Water Meter-pH/COND./SALT/TDS/D.O features:
Large LCD to display multiple parameters in turns:
pH, Conductivity or TDS or Salinity, Dissolved oxygen, Temperature (by using different probes)
Displayed parameter is decided by probe type
Water proof function as IP67
Fast measuring of dissolved oxygen value
Accurate replaceable probes with anti-collision cap
Auto ranging for conductivity measurement
Auto temperature compensation (ATC)
99 points memories w/recall function
Multiple points calibration: 3 points for pH, 1 point for D.O., 4 points for conductivity
Manually altitude and salinity compensation function for D.O. measurement
Easy replacement probes
Temperature unit ℃/℉ is switchable
1 hour auto power off
Excellent to use in fresh or sea water aqua farm
Welcome to learn more via AZ Instrument Corp official page,
www.az-instrum...