Maintenance on Salt Bridge Reference:
1. Turn the cell OFF on the controller.
2. Stop the HPLC pump.
3. Disconnect the cell from the controller.
4. Remove the REF from the inlet block.
5. Disassemble the REF by unscrewing the black fitting.
6. Inspect the O-ring for wear, and especially the cotton wool frit; replace if necessary.
Figure 15–19: Exploded view of the reference electrode
Ag/AgCI ele fitting
O-ring
Salt bridge body
REF cap for storage and shipment
7. Remove the remaining KCl from the salt bridge.
8. Clean all parts with demi-water.
9. The frit in the salt bridge ensures electrical contact with the buffer. If the frit is discolored or
dried out, it must be renewed—in which case, continue with step 1 in “Maintenance of the
cotton wool frit”; otherwise, continue with step 7.
15.4.4.4 Maintenance of the cotton wool frit
Note:
Use proper eye and skin protection when working with solvents.
Use the SB ref replacement tool (700013145) to push out the frit from the outside.
December 16, 2021, 715007395 Ver. 00
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