T
Thermo Fisher Barnstead
Pacific AFT
Pure water system
25
13. System Control
General information
When the ON/OFF key is pressed, the system starts running either in the operating state or
the stand-by state, depending on the float switch.
The operating state and the volume contained in the tank is shown in line1 of the display.
Further to this, the volume contained in the tank is indicated in line 1 and the value of the
permeate conductivity measured is shown in line 2.
Should a fault occur, a fault message is given out across the potential-free output and
displayed in line 4. Should several faults occur at once, they are alternately displayed.
13.1 User menu
All measured values, operating times and limiting values that are relevant for the user can be
read or set in this menu.
A press on the menu-key brings you into this menu. Each further press on the menu-key
moves you from one menu point to the next.
Settings can be changed with the arrow keys. When the correctness of a value is confirmed
by pressing Enter, this also takes you to the next menu point.
To simplify changing settings, a press on the UV-key allows you to select the position at
which you wish to change a number, and the arrow keys can be used to set a number from
0-9 at each individual position.
13.1.1 Permeate conductivity:
A single press on the menu-key allows the feedwater conductivity to be read and the limiting
value of the permeate conductivity to be changed. Should the limiting value be exceeded,
then the “
Lim. Val. Permeate
” message flashes in the 4
th
line of the display (measuring point
LF2)
Limiting value setting range: 0.1 – 150.0 µS/cm
Basic setting:
0.02 M
Ω
xcm
With settings above 150.0 µS/cm, the limiting value is switched off and the word „
Off
” appears in
the display.
The display shows:
Permeate
0.083 M
Ω
xcm
Lim.val.permeate
50,0 µS/cm
