Rice Lake IQ plus 2100SL Digital Bench Scale - Manual (Page 23)

Setup and Service Information 3
2.0 Setup and Service Information
This section describes setup and service procedures for the IQ plus 2100 digital bench scale, including installation
and maintenance information, replacement parts lists, and assembly dra wings. See Sections 2.1 through 2.5 for IQ
plus 210 indicator information; see Sections 6.6 and 6.7 for bench scale information.
2.1 Enclosure Disassembly
The indicator enclosure must be opened to connect
cables after replacing the load cell, or when connecting
serial communications cables or digital inputs to the
scale.
The IQ plus 210 has no on/off switch.
Before opening the unit, ensure the
power cord is disconnected from the
power outlet.
• Use a wrist strap to ground yourself and protect
components from electrostatic discharge (ESD)
when working inside the indicator enclosure.
• This unit uses double pole/neutral fusing which
could create an electric shock hazard. Procedures
requiring work inside the indicator must be
performed by qualified service personnel only.
• The supply cord serves as the power disconnect for
the IQ plus 2100. The power outlet supplying the
indicator must be installed near the unit and be
easily accessible
Ensure power to the indicator is disconnected, then
remove the scre ws that hold the backplate to the
enclosure body, then lift the backplate a way from the
enclosure and set it aside.
2.2 Cable Connections
The IQ plus 210 pro vides three cord grips for cabling
into the indicator: two for the power cord and load cell
cabling, the third for communications and digital input
cables. The free cord grip comes with a plug installed to
prevent moisture from entering the enclosure. If your
application requires serial communication or digital
input cabling, remo ve the plug and install cables as
described in Sections 2.2.4 and 2.2.5 on page 5.
2.2.1 Cable Grounding
Except for the power cord, all cables routed through the
cord grips should be grounded ag ainst the indicator
enclosure. Do the following to ground shielded cables:
• Use the lockw ashers, clamps, and k ep nuts
provided in the parts kit to install grounding
clamps on the studs adjacent to the cord grips.
Install grounding clamps only for cord grips that
will be used; do not tighten nuts.
• Route cables through cord grips and grounding
clamps to determine cable lengths required to
reach cable connectors. Mark cables to remo ve
insulation and shield as described below:
• For cables with foil shielding, strip insulation
and foil from the cable half an inch (15 mm)
past the grounding clamp (see Figure 2-1). Fold
the foil shield back on the cable where the cable
passes through the clamp. Ensure silv er
(conductive) side of foil is turned outw ard for
contact with the grounding clamp.
• For cables with braided shielding, strip cable
insulation and braided shield from a point just
past the grounding clamp. Strip another half
inch (15 mm) of insulation only to expose the
braid where the cable passes through the clamp
(see Figure 2-1).
•
IMPORTANT!
For load cell cables, strip the
yellow shield wire 3/4" past the grounding
clamp. Fold wire back and secure between the
cable and clamp. Shield wire function is
provided by contact between the cable shield
and the grounding clamp.
• Route stripped cables through cord grips and
clamps. Ensure shields contact grounding clamps
as shown in Figure 2-1. Tighten grounding clamp
nuts.
• Finish installation using cable mounts and ties to
secure cables inside of indicator enclosure.
Figure 2-1. Grounding Clamp Attachment for Foil-Shielded
and Braided Cabling
Warning
Caution
Cord grip
Insulated cable
Foil (silver side out) Grounding clamp
Shield wire (cut)
Length of foil before folding
back on cable insulation
Cut insulation here
for foil-shielded cables
Braid
Cut insulation here
for braided cables
NOTE: Install lockwashers
first, against enclosure,
under grounding clamp