Instruction Manual Supplement
D104215X012
DLC3100 SIS Digital Level Controller
April 2018
2
2. 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). The displacer with torque tube assembly and lever assembly
constitute the primary mechanical sensors. The angular rotational deflection of the torque tube is measured by the
instrument transducer, which consists of a magnet system moving over a Hall Effect sensor. In level measurement
mode, it is the proportion of displacer covered by liquid that produces the measured buoyancy.
DLC3100 SIS Default Settings
Application
Level
Interface
Level
Alarm Switch
Low Alarm
High Alarm
High Alarm
Safety Recovery
Auto
Manual
Manual
Trip Alarm Current
Settings
Device Malfunction Enable
Reference Voltage Failed Enable
PV Analog Output Readback Limit Failed Enable
Instrument Temperature Sensor Alert Enable
Hall Sensor Alert Enable
RTD Sensor Alert Enable
Hall Diagnostic Alert Enable
RTD Diagnostic Alert Enable
Program Memory Failed Enable
NVM Error Enable
RAM Test Error Alert Enable
Watchdog Reset Executed Enable
PV HiHi Alert Disable
PV LoLo Alert Disable
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