7-4
It is necessary to periodically clean both the sample chamber and the base plate it sets on.
Move the Sipper to the manual sample position. From the Main Menu press [MENU]. Next
press [3] for Diagnostic, then press [1] for Motor, then press [1] for Sipper motor. Press [1] for
Up, to raise the Sipper from the Sample Chamber, then press [4] for Clockwise to move the
Sipper over to the Manual Sample position. Note: You must press [4] (Clockwise) twice to
reach the manual position. See the menu displays below to better understand this sequence of
events.
Please select instrument mode
[RUN] [STANDBY] [MENU]
Select instrument function
1-Service 2-Setup 3-Diagnostic
Select diagnostic
1-Motor 2-Pump 3-Probe 4-I/O 5-Sensor
Motor diagnostic
1-Sipper motor 2-Stir motor 3-Turntable
Sipper diagnostic: 1-Up 2-Down 3-Home
4-Clockwise 5-Counterclock 6-Exercise
Unscrew and remove all three probes from the sample chamber. If your membranes are in good
condition (that is, if they pass the tests in Section 3.3) it is not necessary to replace them. It is
important that the membranes do not dry out. If the chamber is to be disassembled from the
instrument for more than 15 minutes, the membranes should be replaced.
Unscrew the two thumb nuts on top of the sample chamber. Remove the sample chamber and
waste chamber from the base plate (see Figure 7.1).
You will need to disconnect the calibrator well tube and the drain tube. Be careful not to discard
the small magnetic stir bar. An extra one is supplied in your maintenance kit. Clean the
chambers with the appropriate disinfecting agent. After cleaning, flush the chambers with
copious amounts of warm water, then rinse with distilled water to remove any traces of the
disinfecting agent.
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