YL Instruments YL9100 HPLC, User Manual

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YL9112 Isocratic Pump
Chapter 5. Maintenance
In the event that problem occurs or it is necessary to change part due to wear of seal in using YL9112
isocratic pump, perform maintenance for instrument by referring to the following items.
5-1. Caution
In order to protect instrument, take care for the following items in using it.
1) After using solvent with sediment such as buffer solution, replace solvent with pure water at first
and then methanol or iso-propanol and make it flow for 30 minutes using each solvent at
1.0ml/min flow rate.
Y
L9112
2) Do not use solvent to corrode stainless steel material that is less than pH 2.3.
Material Solvents to avoid
PEEK
Carbon Tetrachloride, Liquid Chlorine
Methylene Chloride, Tetrahydrofuran
Teflon(PTFE) Dimethyl Formamide, Diethylamine
SS316 Phosphoric Acid(Conc, Rm Temp)
3) Do not install instrument where corrosive gas is generated or where there is carpet on floor.
4) Do not change flow rate rapidly in order to prevent from wrong operation of instrument, damage
to column and damage to damper.
5) Do not operate instrument with excessive force.
5-2. Replacement of high pressure seal
If instrument is used for long time, high pressure seal is worn out to produce leakage of solution. In this
case, after replacing it with new seal, it is necessary to condition it in order to make seal be used for long
time at high pressure. Change and condition high pressure seal in the following method. In case
instrument is used for the first time after purchasing, it is desired to perform training and it is better to
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