Emerson Fisher L2e Configuration guide

www.Fisher.com

Replacing the Controller Assembly

(RL2E0X00C12) on the FisherrL2e Electric Level

Controller

Supplement to Fisher L2e Electric Level Controller Instruction

Manual (D103531X012)

This supplement contains information on how to replace the complete controller assembly on the L2e controller.

Refer to the L2e instruction manual (D103531X012), available from your Emerson Process Management sales office or

at www.Fisher.com, for all other information regarding the L2e electric level controller.

WARNING

Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal

injury. To avoid personal injury or property damage caused by the release of pressure or process fluid, observe the

following before starting maintenance:

D Provide some temporary means of control for the process before taking the controller out of service.

D Provide a means of containing the process fluid before removing any measurement devices from the process.

D Vent any trapped process pressure.

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

WARNING

For explosionproof applications, disconnect power before installing, servicing or removing electrical components.

Personal injury or property damage from fire or explosion may result if power is not disconnected.

Select junction boxes, wiring and/or cable glands that are rated for the environment of use (such as hazardous location,

ingress protection, and temperature). Failure to use properly rated electrical hardware wiring and/or cable glands can

result in personal injury or property damage from fire or explosion. Wiring connections must be in accordance with local,

regional, and national codes for any given hazardous area approval. Failure to follow the local, regional, and national codes

could result in personal injury or property damage from fire or explosion.

Instruction Manual Supplement

D104022X012

L2e Controller

September 2015

Instruction Manual Supplement

D104022X012

L2e Controller

September 2015

Removing the Controller From the Sensor

Refer to figure 1 for key number locations unless otherwise indicated.

1. Disconnect power from any electrical source.

2. Disconnect electrical wiring from switch.

3. Note Span adjustment setting.

4. Slide the hook end of the zero spring (key 7) over and off the controller end of the displacer rod (key 64).

5. Remove the four controller mounting screws (key 24), and pull the controller straight away from the sensor.

Figure 1. Fisher L2e Controller

SWITCH

SPAN

ADJUSTMENT

LEVER B

GG10047

w/Displacer Rod

PLUNGER

FACTORY SET - DO NOT ADJUST

LEVER A

CONTROLLER MOUNTING

SCREWS (KEY 24)

ZERO SPRING

(KEY 7)

ZERO ADJUSTMENT

DISPLACER

ROD (KEY 64)

ZERO ADJUSTMENT

HEX NUT (KEY 5)

Instruction Manual Supplement

D104022X012

L2e Controller

September 2015

Replacing the Complete Controller Assembly (RL2E0X00C12)

Refer to figure 1 for key number locations unless otherwise indicated.

1. Install the new controller assembly on the sensor. (Make sure lever A is under the displacer rod.)

2. Mount with the four 7/16” cap screws (key 24), supplied in the kit. Torque to 6.8 N•m (60 lbf•in), using medium

strength thread locking adhesive.

3. Slide the hook end of the zero spring (key 7) onto the controller end of the displacer rod (key 64).

4. Reconnect switch wiring.

5. Reconnect power to electrical source

6. Perform the Initial Setup (Dry Displacer) and Zero and Span Adjustment procedures below.

L2e Initial Setup (Dry Displacer)

Refer to figure 2.

1. Move Span to minimum setting.

2. Move Zero down until the valve opens, or N/C contact (red to brown leads) closes.

3. Slowly move Zero up until valve closes, or N/C contact (red to brown leads) opens.

Figure 2. Initial Setup

GG11109-C

Instruction Manual Supplement

D104022X012

L2e Controller

September 2015

L2e Zero and Span Adjustment (Wet Displacer)

After initial setup (dry displacer) is complete,

1. Enable process flow into the vessel.

2. Move Zero and Span Adjustment for desired liquid zero position (setting noted on previous unit) and level DG

(differential gap).

3. Tighten the Zero Adjustment hex nut (key 5), shown in figure 1, to lock the Zero setting.

Emerson Process Management

Marshalltown, Iowa 50158 USA

Sorocaba, 18087 Brazil

Chatham, Kent ME4 4QZ UK

Dubai, United Arab Emirates

Singapore 128461 Singapore

www.Fisher.com

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not

to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are

governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such

products at any time without notice.

Fisher is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co. Emerson Process Management,

Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance

of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

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