Grounding guidelines

Electrostatic discharge damage

Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, ESD contains enough power to alter device parameters or melt silicon junctions.

A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred.

An electronic device exposed to ESD may not be affected at all and can work perfectly throughout a normal cycle. Or the device may function normally for a while, then degrade in the internal layers, reducing its life expectancy.

CAUTION: To prevent damage to the tablet when you are removing or installing internal components, observe these precautions:

Keep components in their electrostatic-safe containers until you are ready to install them.

Before touching an electronic component, discharge static electricity by using the guidelines described in this section.

Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.

If you remove a component, place it in an electrostatic-safe container.

The following table shows how humidity affects the electrostatic voltage levels generated by different activities.

CAUTION: A product can be degraded by as little as 700 V.

Typical electrostatic voltage levels

 

 

Relative humidity

 

 

 

 

 

Event

10%

40%

55%

 

 

 

 

Walking across carpet

35,000 V

15,000 V

7,500 V

 

 

 

 

Walking across vinyl floor

12,000 V

5,000 V

3,000 V

 

 

 

 

Motions of bench worker

6,000 V

800 V

400 V

 

 

 

 

Removing DIPS from plastic tube

2,000 V

700 V

400 V

 

 

 

 

Removing DIPS from vinyl tray

11,500 V

4,000 V

2,000 V

 

 

 

 

Removing DIPS from Styrofoam

14,500 V

5,000 V

3,500 V

 

 

 

 

Removing bubble pack from PCB

26,500 V

20,000 V

7,000 V

 

 

 

 

Packing PCBs in foam-lined box

21,000 V

11,000 V

5,000 V

 

 

 

 

Grounding guidelines

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HP 7 Plus 4200ca, 7 Plus 4200us manual Grounding guidelines, Electrostatic discharge damage
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7 Plus 4200ca, 7 Plus 4200us specifications

The HP 7 Plus 4200us and 4200ca are versatile tablets designed to cater to a wide array of user needs, enhancing productivity, and entertainment experiences. Both models come equipped with a 7-inch display, providing a compact form factor that is perfect for on-the-go usage, whether for browsing the web, reading, or streaming videos.

One of the main features of the HP 7 Plus 4200us and 4200ca is their impressive processing capabilities. Powered by a quad-core processor, these tablets deliver smooth performance for multitasking and running demanding apps. With 1GB of RAM, users can expect decent responsiveness when switching between various applications.

The storage options on these models enhance their usability, as they come with 8GB of internal storage. For users requiring more space for apps, multimedia files, and documents, both models support microSD cards, allowing for extensive storage expansion of up to 32GB. This feature is especially valuable for those who prefer to take their media library on the go.

In terms of connectivity, the HP 7 Plus tablets come equipped with Wi-Fi capabilities, ensuring users can stay connected to their favorite online content. The inclusion of a front and rear camera adds versatility, enabling video calls and photography, which is a great addition for both personal and professional use.

The tablets run on the Android operating system, providing access to the vast Google Play Store, where users can download thousands of applications, games, and other digital content. The intuitive interface allows for seamless navigation, making it user-friendly for individuals of all ages.

Battery life is another significant aspect of the HP 7 Plus series. With a robust battery included, users can enjoy extended use without frequent recharges, making it convenient for travel or long workdays.

In summary, the HP 7 Plus 4200us and 4200ca bring together essential features and capabilities that make them suitable for both casual users and those seeking a reliable device for productivity. Their lightweight design, powerful processing, expandable storage, and robust operating system ensure a valuable addition to anyone's tech arsenal. Whether for work, communication, or entertainment, these tablets stand out as practical devices that cater to diverse user needs.
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