Endress+Hauser CA76NA, Operating Instructions Manual

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CA76NA Maintenance
Hauser 49
11 Maintenance
L
WARNING
Electrical voltage
Risk of serious or fatal injury
‣
De-energize the device when performing maintenance work.
L
CAUTION
Failure to observe the maintenance intervals
Risk of personal injury and damage to property
‣
Keep to the recommended maintenance intervals
11.1 Maintenance schedule
Interval Maintenance work
Daily Visual inspection of the device
Weekly Visual inspection of the level in the bottle containing alkalization reagent
Weekly Visual inspection of the filter and housing to check for fouling
Weekly Check the functional integrity of the sample conditioning unit
Weekly Check the regulation of the sample flow
Approx. Once a month Calibrate the pH electrode
As needed, approx.
Once a month Cleaning the flow through cell
As needed, approx.
every 2 months Replace the alkalization reagent
Every 6 months Check the lines for leaks
As needed, every 6
months at the latest Replace the standard solution
Approx. every 6
months Replace the sodium electrode
Approx. every 6
months Replace the pH electrode
Every 6 months Alkalization reagent: check the bottle containing alkalization reagent and the hoses
for leaks
Annually Check the transmission of alarms and signals
As needed Clean the filter of the sample conditioning unit
As needed Replace the filter of the sample conditioning unit
11.2 Maintenance tasks
11.2.1 Before all maintenance tasks
1. Switch off the automatic mode via: Maintenance / Operating Mode / Mode = OFF .
 The device stops the program currently running. The analyzer is in the standby
mode.
2. Shut off the supply of medium at the control valve by turning the valve clockwise
→  3,  10.