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| The history of Yokogawa in strip chart recording instruments can be summarized by its providing the most reliable and readable recorders, with unmatched performance, over the last fifteen years. In 1981, Yokogawa developed the Model 3088 hybrid recorder which was the first dot printing type recorder in the world to contain a microprocessor. Since then, we have continued to make many technical breakthroughs, including the non-contact ultrasonic position detector, and high breakdown voltage (HBV) solid state relay, continuing to advance what you can achieve in multipoint recording closer to your ideal.Many of these innovations can be found in the DR230.
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| The carriage drive section of the dot printer head employs a screw shaft which is unique for a strip chart recorder. The drive belt and wire cable have been removed, resulting in increased reliability.
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Integration of the design, manufacture and quality evaluation system
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Routine installation work is automated, preventing careless mistakes during the production process from assembly through inspection. The result is a high grade, highly reliable product.
We also use precision test equipment on the production line to further increase reliability.
The DR230 provides many economic benefits for the user, such as reduced wiring for remote measurement, space saving due to compact design, and optimized signal conversion costs due to the availability of a large variety of input modules.
In addition, it provides superb environmental ruggedness, and onboard computation and memory functions, enabling it to be used for a wide range of applications.
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Complete channel isolation and high-voltage measurement
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Channels at the input circuit are fully isolated with high-voltage solid-state relays.*1 The DR230 can withstand a common-mode voltage of up to 250 VAC*2 rms and a withstanding voltage of up to 1500 VAC*2 (for a duration of one minute). These features ensure that the model is even applicable to multi-point measurement in the field.
*¹: RTD and pulse inputs share a common line within the same module.
*²: Depends on module types.
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Superb environmental ruggedness
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| Every effort has been made in the design of the DR230 to reduce power consumption, thereby minimizing temperature rise. As a result, the subunits can be operated over an ambient temperture range of -10 to 60 degreea C. It can also withstand severe conditions encoutered in the field.
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Max. 500 ms/300 channel high speed measurement (expandable model)
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| Parallel processing of data is used by the dedicated A/D converter inside each input module. 1 Mbps high speed data transfer is accomplished between the main unit and each subunit. Furthermore, the use of a distributed multi-CPU control method for the overall system achieves high speed measurement of data from 300 channels over an interval of 500 ms. The DR230 has a time axis resolution four times that of the previous model (DA2500E), achieving better time synchronization between channels.
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Space saving due to compact design
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| The depth of the main unit of the DR230 hybrid recorder has been greatly reduced: It is about 60%*¹ of previous models in the case of the 60-channel model, and about 80%*² in the case of the 30-channel general-purpose model. Also, the use of high breakdown voltage solid state relays and a planar transformer developed by YOKOGAWA has enabled the volume of the 60-point input remote measurement section to be reduced to 1/5*³ of that of previous models, resulting in a highly compact unit. The mass of the unit has also been reduced to about 1/2*¹. This makes for more efficient use of control room or laboratory space and reduces toal costs.
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