Instructions were wrong. It mentioned using distilled water and setting it to zero. There is no zero. Googled and found out to use olive oil to calibrate to 71.5. Once that was done. Voila. It just needs to have updated instructions.
ο»Ώ
Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review
Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
7 Review
π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review
TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 Review