Metrohm 867 pH Module - Manual (Page 31)

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3 Installation
867 pH Module
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Figure 13 Connecting a reference electrode
3.5.3 Connecting a polarizable electrode
Connect the polarizable electrode as follows:
1 Plug the electrode plug into the Pol. socket of the 867 pH Module.
Figure 14 Connecting a polarizable electrode
NOTE
The electrode cable is protected against accidental disconnection
of the cable by means of a pull-out protection. If you wish to pull
out the plug again, you will first need to pull back the outer plug
sleeve.