6
Preparing the pH Buffer Solutions
EC910 portable multiparameter water quality meter is packaged with three pH buffer packets required for calibration.
●
Open the pH7.00 buffer packet, place the powder into a 250ml volumetric flask. Pour distilled water 250ml to scale line, mix the solution until
reagent is completely dissolved.
●
Preparation of pH4.01 and 10.01 standard buffer solutions are the same as above.
●
Prepared standard buffer solutions should be stored in hermetically sealed glass containers.
Refilling Electrolyte Solution for DO Probe
1.
Unscrew the membrane cap from the bottom of the dissolved oxygen probe.
2.
Fill the membrane cap halfway with electrolyte solution.
3.
Screw the membrane cap onto the probe, excess electrolyte will drain out.
4.
Be sure the cathode of probe makes contact with membrane cap, the electrolyte solution in membrane cap should be without an air bubble.
…………Cathode
EC910 Portable Multiparameter Water Quality Meter
