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Instruction Manual
D103032X012
Table 1. Specifications (continued)
Displacer Material and Sensor Temperature
(8)
Limits
PVC Displacer -29 to 79_C (-20 to 175_F)
S31603 SST Displacer: -40 to 204_C (-40 to 400_F)
Operative Ambient Temperature Limits
Controller: -29 to 71_C (-20 to 160_F)
Standard Supply, and Output Pressure Gauge
Indications
Triple scale gauges in 0 to 60 psig/0 to 0.4 MPa/0 to
4.0 bar
NOTE: Specialized instrument terms are defined in ISA Standard 51.1 - Process Instrument Terminology.
1. Any deviation from the standard construction described in the input signal specification above requires special displacer sizing considerations. Contact your
office
for information.
2. Depends on float rod/displacer orientation and length. Contact your Emerson Process Management sales office before proceeding for further information.
3. Minimum specific gravity differential with standard displacer is 0.4. Minimum specific gravity differential of 0.1 is possible with special displacer, consult your Emerson Process Management sales
office for displacer sizing information.
4. This product can be used with natural gas as the supply medium.
3
5. Normal m
/hr—Normal cubic meters per hour (0_C and 1.01325 bar, absolute) Scfh—Standard cubic feet per hour (60_F and 14.7 psia).
6. Converting from a threaded NPT connection to a flange connection is to be done by the end-user. Refer to
Supplement
(D103277X012), available at www.Fisher.com or from your Emerson Process Management sales office.
7. Standard lever arm length.
8. The pressure and temperature limits in this document and any applicable code limitations should not be exceeded.
Description
The rugged L2 liquid level controllers use a displacer type sensor (see figure 1) to detect liquid level or the interface of
two liquids of different specific gravities.
These controllers use a single four‐mode relay to provide the applicable control and action. The device delivers a
pneumatic output signal to a control/dump valve.
Unless otherwise noted, all NACE references are to NACE MR0175‐2002.
Specifications
Specifications for the controller and sensor are listed in table 1.
Educational Services
For information on available courses for L2 Liquid Level Controllers, as well as a variety of other products, contact:
Emerson Process Management
Educational Services, Registration
Phone: +1-641-754-3771 or +1-800-338-8158
Email: education@emerson.com
http://www.emersonprocess.com/education
Hazardous Area Classification
Complies with the requirements of ATEX Group II
Category 2 Gas and Dust
Declaration of SEP
(8)
Fisher Controls International LLC declares this
product to be in compliance with Article 3 paragraph
3 of the Pressure Equipment Directive (PED) 97 / 23 /
EC. It was designed and manufactured in accordance
with Sound Engineering Practice (SEP) and cannot
bear the CE marking related to PED compliance.
However, the product may bear the CE marking to
indicate compliance with other applicable European
Community Directives.
Converting a Threaded NPT Connection to a Flange Connection instruction Manual
L2 Controller
July 2015
Emerson Process Management sales
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