fisher DLC3000 series displacer level transmitter
fisher DLC3000 series displacer level transmitter
fisher
DLC3100
Fisher™ FIELDVUE™ DLC3100 Digital Level Controller Management of Change Guide
Table of Contents
Management of Change 2
Background 2
Question & Answer Checklist 2
FIELDVUE DLC3010 and DLC3100 Instrument
Comparison 3
DLC3010 to DLC3100 Instrument Transition Design
Comparison 5
Conclusion 6
Management of Change
Management of Change (MOC) is a procedure used to proactively manage changes
that have the potential to impact safety or the process within a plant. Evaluating
new techniques for improving MOC approval procedures can have an impact on
plant efficiency. Historically, upgrading obsolete products or replacing existing
process control equipment had been delayed or abandoned due to the extensive
paperwork involved in completing a complex MOC approval sheet.
Background
Fisher™ FIELDVUE™ DLC3000 series digital level controllers have been in the industry
for nearly two decades. The introduction of the DLC3100 digital level controller
has significantly evolved the product line. There is an improved ease-of-use with
an interactive local user interface for configuration. Also, the DLC3100 digital level
controller can be used in safety instrumented systems (SIS) and is certified to SIL
2 capability. In addition, the DLC3100 digital level controller has been designed
to allow the user to easily replace a DLC3010 with the new DLC3100 digital level
controller.
Question & Answer Checklist
1 Q: Does the proposed modification cause any changes to the piping and instrumentation diagram (P&ID)?
A: Only the instrument name changes from DLC3010 to DLC3100.
2 Q: Does the proposed modification change process chemistry, technology, or operating and control philosophies?
A: No.
3 Q: Have the operating and design limits of the proposed modification changed?
A: No.
4 Q: Have the codes and standards to which the new equipment has been designed changed?
A: No.
5 Q: Does the proposed modification change the Hazardous Area Classification?
A: No. Note that the I.S. entity parameters have changed. See Table 3.
6 Q: Does the proposed modification introduce new equipment that needs to be operated and, has a new operations list been stated?
A: The DLC3100 is operated the same as the DLC3010 digital level
controller.
7 Q: Does the proposed modification introduce new equipment items that require spare parts, training manuals, maintenance procedures or training to teach the maintenance department how to maintain them?
A: Yes. The standard components that may be required for maintenance
are different between the DLC3100 and DLC3010 digital level
controllers, except the mounting and lever assembly.
8 Q: Does the proposed modification change the spares for existing pieces of equipment?
A: Yes. The LCD and push button assemblies and electronics board are
different from DLC3010 digital level controller.
9 Q: Does the proposed modification introduce new equipment items that require periodic predictive maintenance?
A: No. The new equipment items that may require periodic maintenance
are the same as the old equipment.
FIELDVUE DLC3010 and DLC3100
Instrument Comparison
The DLC3100 digital level controller with HART® communication uses different
internal components, electronics, and covers than the DLC3010. This is detailed
below in Table 1.
DLC3010 Component | DLC3100 |
Front Cover Assembly (with push buttons and LCD board) | New |
Main Electronics Board Assembly | New |
Sensor Module | New |
Lever Assembly | No Change |
Housing | New |
Terminal Box | New |
Firmware | New |
