I went back to the store from which I got the meter and purchased a cleaningtest kit. 가장 먼저 한 일은 기준 용액 EC를 사용하여 미터를 테스트하는 것이었는데, 판독값만 나오는 것을 보고 깜짝 놀랐습니다. to test the meter and was stunned to see it read only.. Was the meter wrong or was the reference solution improperly mixed?