Replacing The Fuse; Chemical Compatibility - Xycom 3400 Series Hardware Reference Manual

Any questions regarding this issue may be directed to our support center at
support@xycom.com.
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.
Chemical Class
Acids
Alcohols
Alkalis
Aliphatic Hydrocarbons
Amines
Aromatic Hydrocarbons
Detergents and cleaners
Esters
Greases and oils
Halogenated Hydrocar-
bons
Ketones
Silicone oil and greases
75
Table 6 -1. Chemical Compatibility
Effects
No effect under most common conditions of concentration
and temperature.
Generally compatible at low concentration and room tem-
perature. Higher concentrations and elevated temperatures
result in etching and attack evidenced by decomposition.
Generally compatible at low concentration and room tem-
perature. Higher concentrations and elevated temperatures
result in etching and attack evidenced by decomposition.
Generally compatible
Surface crystallization and chemical attack. Avoid.
Partial solvents and severe stress cracking agents. Avoid.
Mild soap solutions are compatible. Strong alkaline materi-
als should be avoided.
Causes severe crystallization. Partial solvents. Avoid.
Pure petroleum types generally compatible. Many additives
used with them are not compatible.
Solvents. Avoid.
Causes severe crystallization and stress cracking. Partial
solvents. Avoid.
Generally compatible up to 85º C (185º F). Some contain
aromatic hydrocarbons which should be avoided.