Shimadzu IonFocus Instruction Manual page 56

4 Troubleshooting
Problem
The ion intensity is
unstable or low.
The base level
(background level) is
too high.
34
™
IonFocus Unit
Cause
Focus unit ASSY
The focus unit ASSY is not
correctly mounted.
The focus unit ASSY is soiled.
DUIS
The corona needle is bent.
The corona needle is soiled.
The probe has not been
heated properly.
The interface current and
focus current are large.
The high voltage is not being
supplied properly.
Broken wire in the
high-voltage cable, heater
cable or sensor.
Heat block
The heat block is soiled.
Soiling of the heat block
Soiling of the spray unit
Soiling of the ionization unit
Soiling due to the standard
sample for auto tuning
Corrective Action / See
"3.1.3 Mounting the Focus Unit
ASSY" P.13
"5.2.4 Maintenance of the Focus
Electrodes" P.52
"5.2.5 Maintenance of the DUIS
Focus Electrodes" P.58
"5.2.5 Maintenance of the DUIS
Focus Electrodes" P.58
Check the analysis method
parameters and the tuning file.
Contact your Shimadzu
representative if the situation does
not improve.
Decrease the interface voltage and
focus voltage.
The interface current and focus
current may become unstable as
the result of discharge.
Check the analysis method
parameters and the tuning file.
If there is no problem, a wire may
be broken.
Contact your Shimadzu
representative.
Contact your Shimadzu
representative.
"5.2.3 Cleaning the Spray Unit"
P.46
"5.2.3 Cleaning the Spray Unit"
P.46
"5.2.3 Cleaning the Spray Unit"
P.46
"5.2.3 Cleaning the Spray Unit"
P.46
In addition to water and methanol
taken as examples of solvent that
can remove soiling, organic
solvent-based mobile phase is also
effective for cleaning.
"5.2.3 Cleaning the Spray Unit"
P.46