Horizontal Mount Digital Bargraphs

Description

Horizontal Mount Digital Bargraphs are devices used to measure and display process and electrical variables such as pressure, flow, temperature, speed, current, and voltage. They present data digitally using horizontal segments to indicate the degree of information displayed. These bargraphs can feature LED or LCD technology, with LED versions using rows of tiny light bulbs illuminated by electron movement in a semiconductor material. The display can be configured to show negative and positive values, with zero points positioned either at the end or in the middle of the bargraph.

Working Principle

Horizontal Mount Digital Bargraphs operate by converting analog signals into digital displays. They utilize digital-to-analog converters (DACs) to transform digital codes into voltage levels, which are then processed to produce the required output signal characteristics. The bargraph visually represents these signals through illuminated segments, providing a clear and immediate understanding of the measured variable's status. This visual representation is particularly useful for quickly assessing the state of a process or system, making them valuable tools in monitoring and control applications.

Applications

Horizontal Mount Digital Bargraphs are used in various applications where monitoring of process variables is critical. Specific examples include:

• Industrial automation systems where real-time monitoring of temperature and pressure is essential.
• Electrical panels for displaying current and voltage levels in power distribution systems.
• Laboratory environments for precise measurement and display of experimental data.

Advantages over other Digital Bargraphs

Horizontal Mount Digital Bargraphs offer several advantages over other types of digital bargraphs:

• They provide a clear and intuitive visual representation of data, which can be easier to interpret at a glance compared to purely numeric displays.
• The ability to display both negative and positive values on the same scale can be beneficial for applications requiring bipolar measurements.
• The use of LED technology allows for high brightness and visibility, even in challenging lighting conditions.

Limitations

Some limitations of Horizontal Mount Digital Bargraphs include:

• The need for panel modifications or custom installations in retrofit situations, as early models were not always compatible with existing panel sizes.
• Potential differences in readings when used alongside other types of meters, which may require additional calibration or adjustments.

Considerations

When selecting and using Horizontal Mount Digital Bargraphs, several considerations should be taken into account:

• Initial Costs: The cost of purchasing and installing these devices can vary depending on the complexity and features required.
• Operating Expense: LED-based bargraphs may have higher energy consumption compared to LCD versions, impacting operating costs.
• Durability: Rugged versions are available for harsh environments, but standard models may require protection from dust and moisture.
• Accuracy: Typically, these devices offer high accuracy, with some models achieving 0.1% of reading for DC measurements.
• Replacement and Maintenance Costs: Regular maintenance may be needed to ensure optimal performance, and replacement costs should be considered if the device is used in demanding applications.