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2873100
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Sentry Sample Sequencer IV and Sample Manifold, up to 8 points between two analyzers, 85 to 265 Vac, 47 to 440 Hz, 8-point track and hold, 12 Vdc valve outputs. The Sample Sequencer is designed for us

Sentry Sample Sequencer IV and Sample Manifold, up to 8 points between two analyzers, 85 to 265 Vac, 47 to 440 Hz, 8-point track and hold, 12 Vdc valve outputs. The Sample Sequencer is designed for use with Hach's Series 5000 line of analyzers. The sequencer operates independently from the analyzer, waiting to receive the instrument's end-of-cycle signal before it switches sample input and signal output lines. Since the Series 5000 is also operating independently, it can analyze a different sample stream each cycle. 2627904: Manifold Sample Valve Assembly, four sample, CE approved. 2627908: Manifold Sample Valve Assembly, eight sample, CE approved.

  • Versatility
  • Convenience and Ease of Use
  • Share Analyzers for Less Errors
  • Rugged Construction
  • Method of Operation

    Versatility

    The Sentry Sample Sequencer IV is a microprocessor-based modular programmer that can electronically switch between a maximum of eight sample streams to two analyzers when used with the electrically controlled Sample Manifold. The Sample Sequencer is designed for use with Hach’s Series 5000 line of analyzers. It connects the analog output signal to a recorder or a data acquisition system. Use the sequencer’s RS485 output to connect a PC to the Sample Sequencer for remote monitoring, control, and data acquisition. Alarm contacts for low/high analog alarm and an analyzer system alarm alert for connection to an annunciator are also available.

    Convenience and Ease of Use

    The Sample Sequencer IV can be programmed from the keypad on the front display or from a computer. Individual programmable sample timers and custom sequence lets the sequencer conform to unique sampling requirements. The most recent 255 values can be viewed with a built-in data logger. Remaining sample points not used can beused to time-share a second analyzer. Programmable functions include a high alarm and low alarm for each point and an analyzer system alarm. An easy to read display shows user configurable sample names and analyzer descriptions, analyzer readings displayed in engineering units, and the status of each analyzer.

    Share Analyzers for Less Errors

    Experience has shown that analyzing multiple process streams eliminate possible errors between analyzers and provide a precise comparison of relative values between two or more streams. For example, a single silica analyzer, alternating between condensate polisher inlet and outlet, can resolve the onset of exhaustion with fractional ppb precision. The normal range of variation with independent analyzers may otherwise mask the onset.

    Rugged Construction

    The Sample Sequencer IV is designed for panel mounting. It is housed in a NEMA 4X (IP66) enclosure.

    Method of Operation

    The sequencer operates independently from the analyzer, waiting to receive the instrument’s end-of-cycle signal before it switches sample input and signal output lines. Since the Series 5000 is also operating independently, it can analyze a different sample stream each cycle.

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