Antistatic Precautions; Good Practice; Lithium Battery Hazard - Honeywell Touchpoint Plus Technical Handbook

MAN0984_Iss 2_06/15
Safety Hazards, Warnings And Cautions

2.3.3 Antistatic Precautions

As with all modern electronic circuits, the Printed Circuit Boards (PCBs) in Touchpoint Plus systems utilise
some static-sensitive components that can be severely damaged if subjected to static discharge. Static can be
generated on the human body by friction or movement and is discharged through the first contacted route to
earth. It can also jump gaps between items of differing electrical potential.
Static damage is not always immediately apparent and can cause component failure at any time after the
static discharge has occurred. It is, therefore, very important that everyone takes the following precautions
when handling PCBs:
•
An industry approved antistatic wrist strap, containing a resistive component greater than 1Megohm, must
be worn and connected to an effective earth (ground) point. The continuity between the strap and earth
(ground) must be checked regularly.
•
PCBs must only be handled by their non-conductive edges. Do not allow any components, conductive
tracks or contacts to come into proximity with the body, clothing, machinery, power source or any material
other than a static-dissipative mat.
•
With the exception of assemblies containing batteries, anti-static packaging must be used for transporting
PCBs and Integrated Circuits (ICs). All Touchpoint Plus electronic components are shipped in appropriate
packaging that can be re-used when returning items for test or repair.
•
Avoid wearing clothing manufactured from, or containing a high proportion of, man-made fibres. These
can build up a high static potential that may not be discharged through the body or wrist strap.
An effective earth (ground) point is the protective earth (ground) bus bar inside the enclosure. This can be
used to connect a suitable anti-static wrist strap provided that the Gas detection system is connected to
protective earth (ground) via the mains power supply cable.
If installed correctly, the equipment earth (ground) point is connected directly to mains earth (ground) via
protective earth and the mains power supply cable. It is not dependent on the position of the Isolator switch or

2.3.4 Good Practice

After switching off the system, it is good practice to wait at least 15 seconds before switching it on again. This
allows the circuits and RAM to discharge adequately before being powered-up again. Failing to do so may
cause data corruption.

2.3.5 Lithium Battery Hazard

Lithium batteries are fitted to Touchpoint Plus as backup power sources.
Replace the factory installed battery pack TPPLOIBB with Honeywell Analytics Asia Pacific replacement
battery pack part no. TPPLSIBB and the PCB CMOS battery with type CR2032 only.
Use of other batteries may present a risk of fire or explosion.
Lithium batteries may cause severe injury or death if ingested, and may catch fire or explode if mishandled,
Always handle lithium batteries with care, keep them out of the reach of children, and dispose of them carefully in
Important
circuit breaker.
Lithium Battery Toxic and Fire Hazards
recharged, burned or disposed of incorrectly.
accordance with local regulations.
10
Touchpoint Plus
Technical Handbook