Factors affecting the hydrogen conductivity measurement were analyzed

such as the cation resin regeneration degree

resin crack

resin failure judgement

and water flow direction in cation resin column.Moreover

several countermeasures were proposed.The results showed that

low cation resin regeneration degree caused a low measured value of cation conductivity

while the resin crack resulted in a high one.Inaccuracy judgement on cation resin's failure would cover up the truth of water quality deterioration.Water downflow in cation resin column would result in retention of large number of bubbles

causing high measured value of hydrogen conductivity.When the water flowed in countercurrent mode

both the over low and over high flow rate would affect the measurement results.Therefore

it suggested that the pretreatment discoloration resin be used in cation conductivity measurement

and the resin must be regenerated in continuous countercurrent flow.Full filling up the cation resin column with resin and water before its installation in down flow measurement

and with resin in countercurrent flow measurement can improve the measurement accuracy effectively.