Rice Lake 1280 Enterprise Series Grounding Update

1280 Enterprise™ Series
ESD Grounding Update for Touch Only Models
Product: 1280 Panel Mount Touch Only Models
Issue: Touchscreen is unresponsive when touched and requires a power cycle to restore operation
Cause: Not adequately grounded between panel mount bracket/display and the enclosure
Solution: Installation of a ground strap, additional ground clips and star washers
The safety ground on the 1280 panel mounts does not adequately shunt high frequency electrostatic discharge (ESD) which
can cause the I2C Bus on the touchscreen to lock up.
Manuals can be viewed or downloaded from the Rice Lake Weighing Systems website at
Electrostatic sensitive device, observe handling precautions to prevent shock or damage caused from ESD.
CAUTION
The 1280 ESD Grounding Kit (PN 194056) contains the necessary parts to resolve the shield grounding issue described above.
Follow the grounding procedure included in this document to properly install the grounding kit parts to prevent this issue.
PN 194056 Grounding Kit Contents
Grounding Procedure
1. Power down 1280 and disconnect from power source.
2. Attach ground strap to the backplate of the panel mount using one of the studs and nuts that hold the backplate in
place. Order of reassembly must be star washer, ground strap, star washer and lastly the original nut.
Torque the nuts that secure the backplate to 15 in-lb (1.7 N-m).
Note
February 5, 2019
Part No.
17780 Ground Strap, 16'' Tinned Copper Braid
53075 Clamp, Ground Cable Shield
193810 Clamp, Ground Cable Shield Small
15139 Washer, Star Lock NO 10 Type A
14621 Nut, Keps 6-32NC Hex
Table 1-1. 1280 Grounding Kit Parts List
Earth Grounded Stud
Inside of the Enclosure
Figure 1. Backplate Shield Grounding
Description
Small Ground Clamp
Ground Clamp
Keps Nut
Star Washer
www.ricelake.com/manuals
Qty
1
1
2
7
1
Original Nut
Ground Strap
PN 194060