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Fisher Fieldvue DLC3100 Safety Manual

Sis digital level controller
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Instruction Manual Supplement
D104215X012
Safety manual for Fisher
SIS Digital Level Controller
This supplement applies to
Instrument Level
SIS
Device Type
130D
Device Revision
1
Hardware Revision
1
Firmware Revision
1.0.9
1.
Purpose
This safety manual provides information necessary to design, install, verify, and maintain a Safety Instrumented
Function (SIF) utilizing the Fisher DLC3100 SIS digital level controller. It describes the conditions of use for the
DLC3100 SIS in safety applications. This document must be thoroughly reviewed and implemented as part of the
safety lifecycle. This information is necessary for meeting the IEC61508 or IEC61511 functional safety standards.
WARNING
This instruction manual supplement is not intended to be used as a stand-alone document. It must be used in conjunction
with the following documents:
Fisher DLC3100 Quick Start Guide (D104214X012)
Fisher DLC3100 Instruction Manual (D104213X012)
Failure to use this instruction manual supplement in conjunction with the above referenced documents could result in
personal injury or property damage. If you have any questions regarding these instructions or need assistance in obtaining
any of these documents, contact your
Other related documents include:
D Fisher 249 Caged Displacer Sensors Instruction Manual (D200099X012)
D Fisher 249 Cageless Displacer Sensors Instruction Manual (D200100X012)
D Fisher 249VS Cageless Displacer Sensor Instruction Manual (D103288X012)
D Fisher 249W Cageless Wafer Style Level Sensor Instruction Manual (D102803X012)
www.Fisher.com
™
Emerson sales office
or Local Business Partner.
DLC3100 SIS Digital Level Controller
FIELDVUE
™
April 2018
DLC3100

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Summary of Contents for Fisher Fisher Fieldvue DLC3100

  • Page 1 This safety manual provides information necessary to design, install, verify, and maintain a Safety Instrumented Function (SIF) utilizing the Fisher DLC3100 SIS digital level controller. It describes the conditions of use for the DLC3100 SIS in safety applications. This document must be thoroughly reviewed and implemented as part of the safety lifecycle.

  • Page 2: Description Of The Device

    Description of the Device The Fisher DLC3100 SIS is a microprocessor-based digital level controller that measures and transmits change in liquid level, or level of an interface between two liquids. Changes in the buoyancy of a displacer suspended in a vessel vary the load on a torque tube assembly (249 sensors).

  • Page 3: Terms, Abbreviations, And Acronyms

    April 2018 D104215X012 Terms, Abbreviations, and Acronyms Fisher caged and cageless displacer level sensors. Time required for the digital level controller to carry out its part of the safety function, Device Response includes time taken to sense a change in input (lever assembly) and transmit a TIme corresponding output signal.

  • Page 4: Safety Requirements

    Instruction Manual Supplement DLC3100 SIS Digital Level Controller April 2018 D104215X012 Safety Requirements Average Probability of Failure on Demand (PFD Table 1 shows the achievable Safety Integrity Level (SIL) in Low Demand Mode of operation, depending on the average probability of failure. Table 1.
  • Page 5 Instruction Manual Supplement DLC3100 SIS Digital Level Controller April 2018 D104215X012 D Stress levels are average for an industrial environment and can be compared to the exida profile 2 with temperature limits within manufacturer’s rating (see table 3 and 4 below). Other environmental characteristics are assumed to be within manufacturer’s rating.
  • Page 6 Instruction Manual Supplement DLC3100 SIS Digital Level Controller April 2018 D104215X012 Safety Instrumented System Design Safety Instrumented System (SIS) is an implementation of one or more Safety Instrumented Functions. A SIS is composed of any combination of sensor(s), logic solver(s), and final element(s), as shown in figure 1. Figure 1.

  • Page 7: Sil Capability

    Instruction Manual Supplement DLC3100 SIS Digital Level Controller April 2018 D104215X012 SIL Capability D Systematic Integrity SIL 2 Capable – The DLC3100 SIS digital level controller has met manufacturer design process requirements of IEC61508 Safety Integrity Level 2. D Random Integrity The DLC3100 SIS digital level controller is classified as a Type B device according to IEC61508. The complete element subsystem will need to be evaluated to determine the SFF.

  • Page 8: Application Limits

    Instruction Manual Supplement DLC3100 SIS Digital Level Controller April 2018 D104215X012 Table 7. Failure Rates for Fisher 249 Displacer Sensors with DLC3100 Digital Level Controller High Trip Low Trip Failure Category Failure Rate (FIT) Failure Rate (FIT) Fail Safe Detected, λ...

  • Page 9: General Requirements

    General Requirements Refer to Fisher DLC3100 quick start guide and instruction manual for mounting to a 249 sensor, starting up, and configuring and calibrating the DLC3100 SIS. DLC3100 SIS digital level controllers shall be mounted so that they are easily accessible for service, configuration, and monitoring.

  • Page 10: Proof Testing

    This determination is a critical part of the design of the SIS. A proof test will detect 95% of possible dangerous failures undetected in the DLC3100 SIS digital level controller with Fisher 249 displacer sensors. Proof testing is a vital part of the safety lifecycle and is critical to ensuring that a system achieves its...
  • Page 11 Test steps for the Fisher DLC3100 SIS Following are the steps to detect Dangerous Undetected (DU) failure. The procedure will detect approximately 95% of possible DU failures in the DLC3100 SIS digital level controller with Fisher 249 displacer sensors. Proof Test Procedure: 1.
  • Page 12 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.

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