Reference Electrode Installation - Hach polymetron 9240 User Manual

Installation
7. For each channel, measure the pH in the conditioned sample to check if the pump ratios are
efficient enough to obtain a pH of around 11.0.
8. If necessary, update the ratios of each channel to maintain a final constant pH of 11.0 ± 0.2.

4.4.10 Reference electrode installation

1. Remove the reference
2. Remove the plastic
3. With care, turn the bottom
4. Remove the plastic plug
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sensor from its box.
reservoir from the bottom
(the storage solution is
KCl 3M) and install the
O-ring as shown.
electrolyte tube ferrule
with a maximum ¼ turn to
lock it.
on the entry port.