cytiva pH/C-902 Instrukcja obsługi - Strona 7
Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Nadajnik cytiva pH/C-902. cytiva pH/C-902 9 stron.
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Action
Conductivity
1. Clean the flow cell.
measurement with the
2. The ambient temperature may have
same buffer appears to
decrease over time
Absolute conductivity
1. Recalibrate the conductivity cell.
value wrong
2. The calibration solution, 1.00 M NaCl
Ghost peaks appear in
1. A charged sample has been detected
the gradient profile
2. Air bubbles are passing through the
Error messages
If the suggested actions do not correct the fault, call Cytiva.
pH monitor
Error
Help text message
pH not offset calibrated Must be factory calibrated, contact
service engineer.
Error in temp sensor
If conductivity cell (where temperature
sensor is located) is not connected,
connect cell and restart system. If error
message reappears or conductivity cell is
already connected, contact service
engineer.
Warning: Bad slope
Slope is < 70% or >100%. Clean the pH
electrode. If message reappears, replace
the pH electrode.
pH calibration failed
Very bad slope, <10% or >199%. Check pH
cell connection. Recalibrate. If error
message reappears, replace the pH
electrode.
pH too close betw buff
The difference between pH of the buffers
1&2
used during calibration must be at least
1 pH unit.
pH-value is out of range pH must be in the range 0-14.
Bad or not conn pH
Defect pH electrode or pH electrode not
electr.
connected.
Error factory calibration
Factory calibration of negative offset
pH
must be repeated, contact service
engineer
Conductivity monitor
Error
Help text message
Cell const out of range
1. Wrong solution used during
2. Air in conductivity cell during
pH/C-902 Instruction 14003958 AB
decreased. Use a temperature
compensation factor. (See Section
Setting up the conductivity
temperature compensation,
was not correctly prepared. Prepare a
new calibration solution and
recalibrate the conductivity cell.
(e.g. protein)
flow cell. Check for loose tubing
connections. If necessary use a flow
restrictor after the conductivity flow
cell.
calibration. Recalibrate.
calibration. Flush the flow cell with
calibration solution and recalibrate.
Error
Error cond hardware
)
Incorrect filter size
Temperature monitor
Error
Error in temp sensor
Error temp comp
Error in temp sensor
Ref temp out of range
Reference information
pH electrode
The pH electrode is of the sealed combination double junction type. It
contains a sealed Ag/AgCl reference which cannot be refilled, an
internal electrolyte bridge of 4M KCl saturated with Ag/AgCl, an
outer electrolyte bridge of 1 M KNO
junction and a low profile pH membrane. The pH electrode is
delivered with a transparent cover.
The flow cell should not be used with another pH electrode.
Help text message
3. Dirty conductivity cell. Clean the cell.
Recalibrate.
4. Bad cell. Replace.
Restart system. If error message
reappears, call service engineer.
Enter correct filter size.
Help text message
Temperature sensor in conductivity cell X
is broken or conductivity cell is not
connected. If conductivity cell is not
connected, connect cell and restart
system. If error message reappears or
conductivity cell is already connected,
contact service engineer.
Set correct temperature compensation
(0-9.95%) or if conductivity cell is not
connected, connect cell and restart
system. If error message reappears or
conductivity cell is already connected,
contact service engineer.
If conductivity cell (where temperature
sensor is located) is not connected,
connect cell and restart system. If error
message reappears or conductivity cell is
already connected, contact service
engineer.
Enter correct reference temperature
(0-99.9°C).
, an annular ceramic reference
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