Proface FP3900 - 19 Flat Panel" - Manual (Page 84)

Chapter 4 Specifications
4-45
*1 The front face of the FP unit, installed in a solid panel, has been tested using conditions equiva-
lent to the standards shown in the specification. Even though the FP unit’s level of resistance is
equivalent to these standards, oils that should have no effect on the FP can possibly harm the unit.
This can occur in areas where either vaporized oils are present, or where low viscosity cutting
oils are allowed to adhere to the unit for long periods of time. If the FP’s front face protection
sheet becomes peeled off, these conditions can lead to the ingress of oil into the FP and separate
protection measures are suggested. Also, if non-approved oils are present, it may cause deforma-
tion or corrosion of the front panel’s plastic cover. Therefore, prior to installing the FP be sure to
confirm the type of conditions that will be present in the FP’s operating environment.
If the installation gasket is used for a long period of time, or if the unit and its gasket are removed
from the panel, the original level of the protection cannot be guaranteed. To maintain the original
protection level, be sure to replace the installation gasket regularly.