Hach 9245 Basishandbuch Seite 11

1. Remove the sodium ion selective sensor from its box.
2. Remove the plastic reservoir from the bottom (the storage solution is standard tap
water) and shake gently (as you would a thermometer) to dispose of any bubbles.
3. Install the O-ring as indicated right.
4. Install the ISE in the center position of the measurement chamber (No. 1 in
on page 6).
5. Connect the AS7 cable (with the blue label) to the electrode.
After the electrodes installation, it is very important that none of the electrode heads are touching the bottom part
of the measuring cell.
Fill electrolyte reservoir
The electrolyte reservoir is located at the back of the analyzer (No. 12 in
1. Take the KCl electrolyte bottle and insert the tip of the tapered spout into the reservoir inlet tube
as far as it will go but without exerting any extra pressure.
2. Squeeze on the bottle as many times as necessary to fill the reservoir to about 3/4 of its capacity.
If you have any difficulty filling the reservoir, raise the spout of the bottle very slightly to avoid an
airlock.
3. Using thumb and forefinger, pump on the electrolyte tube between the reservoir and the
reference electrode to remove any air bubbles that may have formed.
4. If necessary, clean any KCl drops from the analyzer and the reservoir.
Analyzer stabilization
At this stage the analyzer has been completely installed, but needs to run for a period of time to
stabilize.
1. Press Start on the main menu to start the measurement process.
2. Leave the system to run for a couple of hours before starting any calibrations.
User interface
Function keys
The display panel has 5 function keys (illustrated below) to allow menu option selection, field
selection, and data entry options.
• The Esc key cancels data input or goes back to the previous screen.
• The Enter key validates the input and goes on to the next step
• The Up Arrow keys select the option displayed immediately above them on the screen.
When a screen requiring data entry is displayed, the first editable field is always highlighted. To
select other fields on the screen, scroll through them by pressing the Up Arrow function key under
the Select option. As each field is selected, the data element available for update is highlighted.
The same is also true when a menu is displayed. In this case, the first available option is always
highlighted. Scroll to the required option by pressing the Up Arrow function key under the Select
option.
C A U T I O N
Figure 1
Figure 1 on page 6).
English 11