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ActionComponent

Replace the pH electrode if difficulties are experienced during

calibration.

Note:

When replacing the pH electrode, do not use the plastic spacer.

pH monitor

Clean and calibrate the conductivity monitor.Conductivity moni-

tor

Adjust the zero-point of the flow meter. This should be done

when the actual flow rate deviates from the flow rate displayed

in the UNICORN System Control module or if a flow rate is dis-

played in System Control when the pumps are off.

Note:

It is important that the zero-point adjustment of the flow meter

is performed properly or the actual flow rate may deviate from

the displayed. It is recommended that the adjustment is per-

formed by a GE Healthcare service engineer.

Flow meter

Prior to the adjustment it is very important to fill the system

completely with liquid so that no air is trapped in the flow meter.

This is best achieved by applying a slight back pressure when

the system is filled by using, for example, a relief valve on the

outlet valve used. When the system is properly primed, the zero-

point adjustment is performed by using the UNICORN instruction

System:Calibrate:Flow_FT141 (and when applicable also Sys-

tem:Calibrate:Flow_FT142).

Note:

The flow meter calibration should be checked every time the

system is moved.

132 ÄKTAprocess Operating Instructions 29-0252-49 AA

6 Maintenance

6.1 User maintenance schedule

GE AKTAprocess User Manual

Other manuals for GE AKTAprocess