Emerson Fisher L2e Instruction Manual page 3

Instruction Manual
D103531X012
Table 1. Specifications
Available Configurations
Controller: Differential gap (DG) electric control
action with intuitive Zero and Span Adjustments
(refer to page 2 for differential gap description)
Sensor: Displacer­type liquid level sensor for
mounting to side of vessel
Input Signal
Type: Liquid level or liquid­to­liquid interface
Level Change Required for Full Change in State of
Output: 5.0 to 305 mm (0.2 to 12 inches)
Dynamic differential gap for the level in the vessel
depends on factors such as valve sizing, actuator
speed, molecular weight, pressure, and temperature
of process fluids, input flow rate, and vessel size.
Specific Gravity Limits
Minimum SG: 0.15
Maximum SG
PVC Displacer: 1.3
SST Displacer: 1.1
Switch Contact Electrical Rating
1 amp resistive, 0.5 amp inductive/28 VDC; contacts
are not polarity sensitive
Note: The easy-Drive actuator application draws
™
7 mA through the L2e contacts @ 5 VDC
Power Requirements
Voltage: 9 - 30 VDC
Maximum Input Voltage Ripple: 400 mV
Current draw:
Less than 15 mA steady state
Less than 500 mA peak startup or switching transient
Sensor to Vessel Connection
J 2 NPT threaded or J NPS 2 CL150 through 1500
slip­on flange connection
Controller Connection
Electrical 1/2-14 NPT external conduit connection
with 0.5 m (greater than 18 inches) of 18 AWG lead
wires, located at the bottom of the case
(1)
Displacer Sizes
J 48 X 305 mm, 541 cm
J 76 X 152 mm, 688 cm
Maximum Displacer Insertion Length
or Vertical
1-7/8 x 12 Displacer with one 6-inch extension
(optional use)
3 x 6 Displacer with one 3-inch extension
(optional use)
Displacer Material and Maximum Mechanical
Sensor Working Pressure
PVC Displacer: Consistent with CL1500 pressure
temperature ratings per ASME B16.34 up to
maximum pressure of 258.5 bar (3750 psig).
For PED (97/23/EC) maximum pressure limited to
200 bar (2900 psig).
S31603 SST Displacer: CL600 pressure temperature
ratings per ASME B16.34 up to maximum pressure of
99.3 bar (1440 psig)
Note: For slip­on flange connection, maximum sensor
working pressure must be consistent with the flange
ratings
Operative Ambient Temperature Limits
Controller: ­40 to 85°C (­40 to 185°F)
Operative Process Temperature Limits
Sensor:
J PVC Displacer: -18 to 71°C (0 to 160°F)
J S31603 SST Displacer: ­40 to 204°C (­40 to 400°F)
Construction Materials
Controller
Case and Cover: Marine grade aluminum
Switch: Aluminum 6061T
Switch Body Internal O-ring: Fluorosilicone Rubber
Span Levers: Stainless steel
Springs: Stainless steel
Sensor
Sensor Body: LCC
O­Rings: Fluorocarbon
Pivot Assembly: Stainless steel
Displacer: J Polyvinylchloride (PVC) or J S31603 SST
Sensor Spring: Stainless steel
-continued-
L2e Controller
June 2022
3
(1­7/8 X 12 inches, 33 in
3 3
(3 X 6 inches, 42 in )
(2)
, Horizontal
(3)
(3)
(3)
3
)
3