Büchi Labortechnik AG
Help with faults | 8
Operation Manual Pure Chromatography Instruments
87/102
Error message Possible cause Solution
Solvent Pressure 2:
Pressure limit has
been exceeded.
Blockage in line after the ELSD
sampling valve
u Check the fluidic lines and
components downstream
from the pressure sensor 2
(between the ELSD sampling
valve and the fraction
collector valve, waste line)
for the source of blockage.
Error in solvent line
calibration file.
Calibration file of solvent lines
damaged
u Shutdown the Pure
software.
u Delete the calibration list.
u Restart the Pure software.
Inlet Gas Pressure
Out of Range - LOW
PRESSURE
No gas or gas flow is low u Check the gas lines in the
system for leaks.
u Make sure gas source/tank
is available.
The pressure gauge is not set
correctly
u Check pressure gauge
setting to make sure that it
is set to deliver 2.5 L/min
gas flow (Inlet Pressure with
Air State off around 85 - 115
psi).
Inlet Gas Pressure
Out of Range - LOW
PRESSURE (Before
run starts)
Blockage in the system u Check the gas lines in the
system for blockages.
The pressure gauge is not set
correctly
u Check pressure gauge
setting to make sure that it
is set to deliver 2.5 L/min
gas flow (Inlet Pressure with
Air State off around 85 - 115
psi).
Inlet gas pressure
out of range- HIGH
(During run)
Blockage in the nebulizer or
gas line to the nebulizer
u Check the nebulizer or
tubing to the nebulizer for
blockages
u Sonicate the nebulizer in a
suitable solvent or replace
nebulizer
Sensor pressure cal-
ibration file
Pressure sensor calibration file
damaged.
u Shutdown the Pure
software.
u Delete the pressure value
list.
u Restart the Pure software.
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