Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 56)

54
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
sensor from its box.
2. Remove the plastic
reservoir from the bottom
(the storage solution is
KCl 3M) and install the
O-ring as shown.
3. With care, turn the bottom
electrolyte tube ferrule
with a maximum ¼ turn to
lock it.
4. Remove the plastic plug
on the entry port.