Roche Cedex Bio, Operator'S Manual

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Roche Diagnostics
Operator’s Manual · Version 3.1 E-27
Cedex Bio System 13 ISE operation
Daily operation
Finishing the shift
ISE Standby status If there is no measurement for more than three minutes, the ISE unit switches to
Standby status. In this status, ISE Calibrator indirect/urine and ISE Reference
Solution are pumped into the measuring channel and moved a short distance at
regular intervals. Also, every two hours, the ISE tubing is primed with ISE Calibrator
indirect/urine and ISE Reference Solution. This is done to prevent the following:
o
Flow of ISE Reference Solution backwards into the measuring channel, which can
damage the electrodes because of the high ion concentration of the ISE Reference
Solution.
o
Crystallization of salts in the tubing, which can cause blockages.
The ISE unit has a separate power supply. Therefore, the Standby status is maintained
even if the main instrument is switched off.
End Shift wizard The end of shift activities are organized in a single wizard. By performing the steps as
suggested by this wizard, you put the system in a condition that allows you to hand
over operation to another operator or to shut down the system and switch off the
instrument.
The following table provides an overview on the steps that make up the end of shift
process.
e
For details on performing the individual tasks, see the instructions in Finishing the shift on
page B-77.
NOTICE
Damage to electrodes and possible tubing blockage
Do not unplug or switch off the ISE power supply. Periodic flow of solutions must be per-
formed at all times.