Siemens ADVIA 2400, Руководство оператора, Страница: 159 / 200

Maintenance 159
Removing electrodes
1. At the Menu Panel, select
Maint.
, then select
ISE Operation
.
2. In the Period. wash area, select
OFF
, then select
Set
.
3. Using a Phillips screwdriver, remove the screws ( 1 , see Figure 5-1) that secure the
DPP shield to the analyzer panel.
4. Push the DPP shield to the right and slowly lift the DPP shield until it reaches
approximately a 90° angle, then gently lift the tab of the DPP shield and remove.
5. Loosen the thumb screw and lift the ISE cover.
6. Disconnect the electrode connectors.
7. Remove the thumbscrew (
1
) to release the plate that secures the electrodes and the
block containing the electrode. (See Figure 5-37.)
8. Remove the electrode to replace.
Installing electrodes
NOTE:
Make sure the K and Na electrodes are conditioned. When the Cl and Ref
electrodes are taken out of their packaging, they are wet. Wipe the Cl electrode
thoroughly, and wash the Ref electrode using water.
NOTE:
To store the reference electrode, refer to Storing the Reference Electrode on page
160.
1. Assemble the new electrodes in the correct order:
2. Set the electrodes in place, paying careful attention not to leave a space between
them.
Make sure there is an 0-ring between each electrode and that the ridges on the side of
each electrode fits into the depressions on the side of the electrode next to it.
3. Tighten the thumbscrew while holding down each electrode with the retaining plate.
4. Insert the electrode connectors.
CAUTION
If a space exists between the electrode connections, the plate retaining the electrodes
cannot close. If you cannot close it, move each electrode left and right little-by-little.
Do not
force the electrode. Fasten the thumbscrew tightly. If the retaining plate
loosens during measurement, liquid could leak, causing a problem with the
instrument.
Priming the ISEs
1. At the ISE Operation window, select
Execute
to the right of the word Initialize.
2. Select
Yes
when prompted to execute.
3. In the Bufferprime area, enter
3
into the Times field.
4. Select
Execute
, then select
Yes
when prompted to execute buffer prime.