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Installation
7
2.3 Powering Up the DC-190
The DC-190 can be operated either from an AC power
source or with an optional rechargeable battery pack
(DC power). The DC power allows the unit to be
completely portable. Instructions for DC operation are
contained in Section 2.3.3.
2.3.1 AC Power Source
To power-up the DC-190 using the AC power cord:
1. Connect female end of AC power cord
(Figure 2-4) under scale base.
Figure 2-4. Location of AC Power Cord Receptacle and
Load Cell Cable
2. Connect load cell cable from scale to Cable
Port 1 in the back of the keyboard
(Figure 2-5).
3. Plug the AC power cord into a grounded 115
VA C receptacle.
Figure 2-5. Scale Base Connector Ports
4. Press ON/OFF and allow scale to warm up for
10 minutes. The display momentarily shows
the revision number, shows all digits from 0 to
9 in a count-up mode, goes blank, shows all
8s, and then enters normal weighing mode.
If the scale is connected to AC power while in the
OFF condition, no warm-up is necessary.
NOTE: If the scale displays erratic data, it may be
caused by a power transient. Turn the scale off and
momentarily unplug it from the wall outlet. Then
restart by plugging the scale back in and pressing ON/
OFF key. The scale will go through a display check;
no warm up is needed.
2.3.2 DC Battery Pack Replacement/Installation
An optional DC battery pack is available and may be
purchased from RLWS to ship with the scale or
retrofit in the field.
The battery pack is located in the bottom of the scale
base and partial disassembly is required to install or
replace it. Use the following procedure to install or
replace the battery pack.
To prevent load cell damage, reinstall
setscrews before replacing battery.
1. Unplug scale from power source.
2. Remove scale platter.
3. Remove the four platform support screws
from the left-hand platform support assembly
(shown in Figure 2-6). Remove the four
screws from the right-hand platform support
assembly.
4. Remove both platform support assemblies
and set aside.
NOTE: The single-platform scale has four
platform support (spider) screws while the
dual-platform scale has four screws for each of the
two platform supports.
Figure 2-6. Removing Platter Support Screws and Platter
Support on a Dual-Platform Scale
LOAD CELL CABLE
AC POWER CORD RECEPTACLE
CABLE PORT 2
CABLE PORT 1
Caution
REMOVE PLATFORM SUPPORT SCREWS
(DUAL-PLATFORM INSTALLATION)