75
Any questions regarding this issue may be directed to our support center at
.
Please note Xycom recommends frequent back ups of your hard drive, especially before beginning any
preventative maintenance procedures.
Replacing the Fuse
The 3408, 3410 and 3412 units have no accessible fuse. Return the unit to Xycom Auto-
mation for fuse replacement.
Chemical Compatibility
Certain combinations of chemical environments, temperature, and stress can adversely
affect parts made from thermoplastic resin. For this reason, material which may come in
contact with 3408/3410/3412 units should be carefully evaluated under end-use condi-
tions for compatibility. You should also follow the use and compatibility recommenda-
tions of the material manufacturer.
Table 6-1 lists general chemical compatibility guidelines.
Table 6 -1. Chemical Compatibility
Chemical Class
Effects
Acids
No effect under most common conditions of concentration
and temperature.
Alcohols
Generally compatible at low concentration and room tem-
perature. Higher concentrations and elevated temperatures
result in etching and attack evidenced by decomposition.
Alkalis
Generally compatible at low concentration and room tem-
perature. Higher concentrations and elevated temperatures
result in etching and attack evidenced by decomposition.
Aliphatic Hydrocarbons
Generally compatible
Amines
Surface crystallization and chemical attack. Avoid.
Aromatic Hydrocarbons
Partial solvents and severe stress cracking agents. Avoid.
Detergents and cleaners
Mild soap solutions are compatible. Strong alkaline materi-
als should be avoided.
Esters
Causes severe crystallization. Partial solvents. Avoid.
Greases and oils
Pure petroleum types generally compatible. Many additives
used with them are not compatible.
Halogenated Hydrocar-
bons
Solvents. Avoid.
Ketones
Causes severe crystallization and stress cracking. Partial
solvents. Avoid.
Silicone oil and greases
Generally compatible up to 85º C (185º F). Some contain
aromatic hydrocarbons which should be avoided.
