Measurement Technology NW
LCI-90 Operator Manual
Page 11
3.0
Mechanical Installation
The LCI-90 is designed for mounting on the front-panel of an electrical enclosure with a suitable
environmental rating. The sealed front face of the LCI-90 is made of 12 gauge stainless steel, and
the slotted rear cage is designed to promote heat transfer, facilitate field wire terminations, and
provide a purchase point for the panel clamps. The front face is 5.7” high x 7.6” wide; the total
depth is 4.75”, depending on the presence of optional modules.
3.1
Environmental Considerations
The front face of the LCI-90 is designed for NEMA 4X applications. It consists of a 316
stainless steel top layer, a sealed lexan window, and five membrane-sealed stainless steel
push buttons. The rear cage is NEMA 1 and requires protection with a suitable enclosure.
A polyurethane gasket, held in-place by a high temperature adhesive is applied to the back-
side of the front face. When mounting the LCI-90 in open deck locations, a front-panel
cover is recommended to protect the unit when it is not in use.
The standard temperature range of the LCI-90 is –40°C to +75°C.
3.2
Dimensions and Cutout
The LCI-90 will fit in a 7.15” x 5.25” cutout (tolerance –0.01, +0.100), with a minimum of
4.75” depth clearance (see Appendix A for dimensional drawing). The front panel can be
up to 5/8” thick.
3.3
Display Mounting
The instrument is held in place with removable panel clamps that index into the slotted
holes on all sides of the display. Four clamps are included with each display, but the unit
can be installed using as few as two if a panel seal is not required. For thin panel mounting,
as many as 8 clamps can be used to ensure a reliable panel seal.
After sliding the display into the cutout, clip the four panel clamps on the sides of the dis-
play, with the flanged end of the clamp facing away from the panel. Once the panel clamps
are installed, tighten the jackscrews against the panel to compress the LCI-90 gasket to seal
against the panel. Lock the jackscrews with hex nuts to prevent them from vibrating loose
over time.
3.4
Ventilation Requirements
The instrument should be mounted with a minimum of 0.75” spacing between the rear
enclosure (all edges) of the display and adjacent equipment.
3.5
Cleaning Instructions
To clean the front panel of the display, use a clean lint free cloth and a high quality and pure
isopropanol. Do not apply the mild solvent directly to the polycarbonate window, instead
wet the cloth or wipe first and then gently wipe the window and the stainless steel bezel.