![]() ![]() To aid in preventative maintenance, the RT-10 also displayed a warning about low battery life so operators could schedule battery replacement at a convenient time rather than waiting until the battery died and the unit no longer worked. To maintain a long battery life with the improved functionality and additional options, a programmable sleep timer put the unit in a low power state when no input frequency or button activation was detected after the programmable sleep time passed. In applications where flow rates appeared erratic, an added gate time filter provided the option to smooth the flow rate display as well as the 4-20mA loop output signal. Also, a 4-20mA loop output option supported remote monitoring of the flow rate in addition to the local display. Where the RT-EX2 was just a monitor without any external signal connections, the RT-10 added a fiber optic output option, making it possible to send a 0-100Hz flow signal remotely. Improvements in the sensor input circuitry increased the allowable maximum signal frequency from 800 Hz to 3000 Hz, extending the range of turbine flowmeters for use with the flow rate transmitter. Using customer feedback and advances in technology and design ideas from its engineering team, AW-Lake made significant design improvements to the original RT-EX2 and introduced a new version called the RT-10 Battery-Powered Flow Rate Transmitter in 2006. Moving from a Monitor to Flow Transmitter If mounted in a hazardous or dirty environment, the unit included a magnet that enabled users to change readouts between the rate and total displays or to reset the totalizer without removing the cover and exposing the sensitive electronics to the environment. ![]() Powered by a single D-cell Lithium battery with a four-year minimum battery life, the RT-EX2 offered long life and simple setup by entering a scaling factor for the rate and total screens to show values. Understanding the market need for simpler meter-mount displays not requiring expensive wiring, AW-Lake introduced the RT-EX2 Battery-Powered Flow Display in the 1990s, the first battery-powered flow monitor mountable on meters and operable in remote areas where power was unavailable. AW-Lake Company even offers a battery-īut in the early days, the only displays available for flow meters were panel mount units requiring an external AC or DC power supply. Some operate in hazardous environments, while others offer connection options to remote monitoring systems. Flow transmitters provide a continuous output of flow data that can be read by operators without the need for additional instrumentation. As some flow systems incorporate many flow meters, monitoring them can be labor intensive, taking hours for operators to travel to multiple locations and connect meters to get readings. If you have a product or analysis to share with the Journal readers, please contact Candace Nicholson at industries implement flow meters to monitor the flow of liquids or gas during various operations to ensure accurate manufacturing processes while avoiding excessive costs. Each article features a product or industry analysis and how it has transformed from its early years. ![]() This new column is dedicated to showcasing the growth of fluid power technology. The Journal is celebrating a 25-year milestone in 2019 and reflecting on how far the industry has come since the birth of the magazine. ![]()
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