Description
pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH?instruments are?calibrated to pH7.0 first (buffer)?then to pH4.0 (slope). Bluelab's EC/CF equipment does not need calibrating as they are all factory calibrated. The CF27.7 (EC2.77)?solution is used as a reference or checking solution?to ensure you have adequately cleaned the EC/CF probe.
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