Thermo Scientific Barnstead GenPure xCAD Plus System, Operating Instructions Manual

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12
System control
Measuring cell error recognition
82
GenPure Thermo Scientific
Error message:
When a error message is shown in the display, e.g. for the ultrapure water limiting value, then the error
message is printed out on expiry of the sending interval.
Print-out:
Measuring cell error recognition
Minimum and maximum limiting values for each of the conductivity measuring cells and the
temperature sensor are fixed. Should measured values go below or above these respectively, then it must
be assumed that a cable break has occurred. The appropriate error message
“Measuring cell LF1” ,
“Measuring cell LF2” , “Measuring cell LF3” or “Measuring cell Temp” is then issued in line 1.
When resistances are in a region below 50
:
or above 20MW, then a cable break or a short-circuit can
be assumed.
These basic settings cannot be changed in any menu.
Code lock
To prevent unauthorized access to system control settings, changes to these settings can only be carried
out when a correct code number has been entered and confirmed with Enter.
In deviation to existing programs, control release can be given at three levels. Only the menu is released
for changes at the first level. Both the menu and the OEM menu are released at the second level. All
menus are released at the third level.
Code numbers:
Each access via the code is printed out by the printer (RS 232) complete with date, time and the code
number used.
The display shows:
No. Menu No. Menu + OEM menu No. All levels
1 0150 4 0450 7 0750
2 0250 5 0550 8 0850
3 0350 6 0650 9 0950
To prevent unauthorized access to system control settings, changes to these settings can only be carried
out when a correct code number has been entered and confirmed with Enter.
In deviation to existing programs, control release can be given at three levels. Only the menu is released
for changes at the first level (Code number 1, 2, 3). Both the menu and the OEM menu are released at
the second level (Code number 4, 5, 6). All menus are released at the third level (Code numbers 7, 8,
9).