5.1 Trouble shooting
110
(1)
Gas and pressure settings
* If pipes or connections of the GC themselves are damaged, they need to be replaced. Stop using the GC, and contact
your Shimadzu representative.
Problem Possible cause Solution Reference
The pressure/flow rate
cannot be set or does
not reach the set value
No gas is supplied. Open the main valve of gas
cylinder to supply gas.
Supply pressure is low. Set carrier gas supply pressure
to 300 to 980 kPa.
Hydrogen: 300 to 500 kPa
Air: 300 to 500 kPa
Makeup gas: 300 to 980 kPa
Gas is leaking. Check for gas leaks, and
tighten the leaking connections.
Replace gaskets or septa.
Refer to [1.3 Gas
supply plumbing] in
Instruction Manual.
The set values of AFC/APC are
not appropriate.
Set values are outside
controllable range.
Set the proper value of
pressure.
Refer to [12.1.2,
12.2.2 and 12.3.2
Setting the flow rate]
in Instruction
Manual.
Carrier gas, column length, and
inner diameter are not specified
properly.
Set carrier gas, column length,
and inner diameter properly.
Refer to [12.1.2,
12.2.2 and 12.3.2
Setting the flow rate]
and [12.1.3 and
12.2.3 Setting
column parameters]
in Instruction
Manual.
Total flow rate is set too low,
and pressure cannot increase.
(In this case, measured value of
flow rate at split vent is
extremely low.)
Increase the total flow rate. Refer to "3.3
Analysis using
capillary column" P.
49.
Split vent trap is clogged.
(Even if total flow rate is set
high, the actual flow rate at the
split vent is low.)
Replace trap. Refer to "4.10 Flow
controller (SPL, WBI
only)" P. 98.
Continual gas leakage You have installed plumbing
parts wrongly.
Install the parts properly. Refer to [1.3 Gas
supply plumbing] in
Instruction Manual.
Graphite ferrule or other
gaskets are damaged. *
Replace the damaged gaskets
with new ones.
Gas is leaking. Check for gas leakage, and
tighten the leaking section.
Replace gaskets or septa.
Refer to [1.3 Gas
supply plumbing] in
Instruction Manual.
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