Thermo Scientific Barnstead GenPure with xCAD
Ultrapure water system
36
12. System control
General information
A press on the ON/OFF-key causes the system to run in the
Interval
operating mode (see Inter-
val mode).
Interval operation then runs automatically every 0.5 hours for the set length of time to ensure
the ultra pure water quality.
When the UV-lamp is on, then the
"UV"
text message is displayed. When temperature compen-
sation of measured values is active, then the
"TC"
message is displayed. In addition, the meas-
ured values for the ultra pure water conductivity and the temperature are displayed.
Should a fault exist, then a fault message is given out across the potential-free output and is
shown in line 4 of the display. Should several faults occur simultaneously, then they are alter-
nately displayed.
When the Nonstop-key is now pressed, the system switches to the
Nonstop
mode, the pump is
started and the solenoid rinsing valve opens for the set rinsing time.
Nonstop
operation can be
stopped by pressing the Interval-key. After a wait of 2 hours, the system switches itself back to
the Interval mode.
A press on the UV-key brings "
UV
" to display. The UV-lamp is only switched on when the sys-
tem is in the Nonstop mode, however. The UV-lamp switches itself off when the Nonstop mode
is ended (2 h). When Nonstop operation is manually stopped by a press on the Interval-key,
then the UV-lamp is not switched off until it has been burning for 0.5 hours.
During the time that the UV-lamp is burning, the intensity of the UV-light in monitored. The dis-
play of the UV-intensity is made in the menu. The TOC-value is also displayed.
User-menu
All of the measured values, operating times and limiting values that are relevant for the user can
be set and read in this menu.
A press on the menu-key brings you into this menu. Each further press on the menu-key moves
you on from one menu prompt to the next.
Settings can be changed with the arrow keys. When you confirm a value by pressing the Enter-
key, you are taken to the next menu prompt. Settings can only be made when the system con-
trol has been previously unlocked (see section12.1.8).
To simplify changing settings, a press on the UV-key allows you to select a certain number in
the numerical value that you wish to change. The arrow-keys can then be used to enter the
wanted number from 0 to 9 at the selected position.
With all three measuring cells for conductivity and with the temperature sensor, a minimum and
a maximum measured value are fixed in the programme. Should measured values be below or
above these values respectively, then it must be assumed that there is a cable break. In such a
case, the appropriate fault message
"Measuring cell LF1"
,
"Measuring cell LF2"
,
"Measuring cell
LF3"
or
"Measuring cell Temp
.
"
is displayed in line 4.
