Siemens SITRANS LR 400 User guide

Siemens Milltronics Process Instruments Inc.
1954 Technology Drive, P.O. Box 4225, Peterborough, ON Canada K9J 7B1
Tel: [phone] Fax: [phone] www.siemens-milltronics.com
Email: [e-mail]
AG030612
SITRANS LR 400 and Easy Aimer LR Retrofit
Objective: The procedure for installing an Easy Aimer LR kit on a SITRANS LR 400.
Equipment: • SITRANS LR 400
• Easy Aimer LR Kit
• Adjustable wrench
• M8 socket wrench
While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or implied.
Overview:
To retrofit the SITRANS LR 400 with an Easy Aimer LR, please follow the directions below:
For a standard SITRANS LR 400, follow the procedures in
Part One: SITRANS LR 400 Standard Emitter .
For SITRANS LR 400 units with Zone 0 approvals, follow the procedures in
Part Two: SITRANS LR 400: Zone O Emitter Change on
page 5.
Part One: SITRANS LR 400 Standard Emitter
Step One: Remove Housing from Horn Assembly
1. Set the unit upright on a firm and clean surface.
2. Loosen locknut connecting housing and flange
assembly.
3. Carefully lift housing from flange assembly, exposing
the PTFE emitter.
4. Set housing aside on a secure surface.
APPLICATION GUIDE
locknu
t
emitter

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 2 of 9
APPLICATION GUIDE
Step Two: Removing the Standard Emitter
NOTE: For Zone 0 approved models, go to Appendix: Zone 0 Emitter Change on page 5.
1. Using an adjustable wrench open to 36mm, loosen
the PTFE emitter assembly from flange.
2. Lift the emitter assembly from the flange.
Step Three: Separating Flange from Horn
1. Turn flange over so it sits flat on the surface with the
horn pointing up
2. Remove the four bolts connecting the flange to the
horn using an M8 socket wrench, and then lift the
horn from the flange.
CAUTION:
• Be careful not to damage the PTFE emitter!
•If assembl
y
comes a
p
art, see A
pp
endi
x
: Troubleshootin
g
on
p
a
g
e 9.

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 3 of 9
APPLICATION GUIDE
Step Four: Attaching Horn to Easy Aimer LR
1. Set horn into Easy Aimer hub, lining up the screw
holes.
2. Fasten the four screws using the 5/32” ball-ended
Alan key and screws provided with kit.
Step Five: Inserting the Emitter Assembly
1. Turn horn assembly over and insert emitter assembly.
2. Thread emitter assembly back into place and tighten
using the adjustable wrench.
CAUTION: Do not over tighten!

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 4 of 9
APPLICATION GUIDE
Step Six: Replacing the Housing
1. Carefully set housing on top of horn assembly.
2. Thread collar back into place and hand tighten.
Step Seven: Changing Process Connection Tag
The process connection tag references the process connection specification drawings for the unit. By adding the Easy Aimer LR,
the unit’s process connection specifications have changed so the old tag must be replaced with the new tag included with the kit.
1. Undo setscrew holding ring in the unit and remove
the tag from the ring.
CAUTION: Be sure to discard old tag as the process
connection information is no longer relevant.
2. Slide new tag onto the ring and reattach to the unit.
NOTE: Process Connection drawings are available at
www.siemens-milltronics.com

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 5 of 9
APPLICATION GUIDE
Part Two: Zone O Emitter Change
The SITRANS LR 400 with Zone 0 approvals has a specially designed emitter. If the emitter assembly comes apart before
reattachment, see
Appendix : Troubleshooting on page 9.
Zone 0, Step One: Remove Housing from Horn Assembly
1. Set the unit upright on a firm and clean surface.
2. Loosen locknut connecting housing and flange
assembly.
3. Carefully lift housing from flange assembly, exposing
the PTFE emitter.
4. Set housing aside on a secure surface.
Zone 0, Step Two: Removing Top Emitter Assembly
1. Using an adjustable wrench open to 36mm, loosen
the top PTFE emitter assembly from flange.
2. Lift the top emitter assembly out of the flange and set
aside for use in
Zone 0, Step Six .
NOTE: If assembly comes apart, see
Appendix:
Troubleshooting
on page 9.
locknu
t
emitter

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 6 of 9
APPLICATION GUIDE
Zone 0, Step Three: Removing Horn
1. Carefully remove Ring # 1 from flange assembly and
set aside.
2. Flip flange assembly, and then undo the four bolts
connecting horn and flange using an M8 socket
wrench.
Zone 0, Step Four: Removing Bottom PTFE Emitter
1. Gently remove horn from
bottom emitter.
2. Turn flange on its side and push the bottom emitter out the flange top.
Remove flange and set aside.

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 7 of 9
APPLICATION GUIDE
Zone 0, Step Five: Attaching Horn to Easy Aimer LR
1. Set horn into Easy Aimer hub, lining up the screw
holes.
2. Fasten the four screws using the 5/32” ball-ended
Alan key and screws provided with kit.
Zone 0, Step Six: Inserting Bottom PTFE Emitter
1. Flip assembly, setting horn on
flat surface and insert bottom
PTFE emitter point first.
2. Place Ring 1 on top of unit , beveled side up, and push firmly until botom
PTFE emitter and ring are completely inserted.
NOTE: Ensure that O rings are set properly in their groves. See
Appendix:
Troubleshooting
on page 9.

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 8 of 9
APPLICATION GUIDE
Zone 0, Step Seven: Replacing Top Emitter Assembly
1. Take the top emitter assembly removed in Appendix
Step Two
and thread into Easy Aimer.
2. Using an adjustable wrench open to 36 mm, tighten
the top emitter assembly.
Zone 0, Step Eight: Reassembly
1. Reattach the housing and replace the process connection tag. For more information, see Steps Six and Step Seven on
page 4.
NOTE: If assembly comes apart, see Appendix:
Troubleshooting
on page 9.

Easy Aimer LR and SITRANS LR 400 Retrofit AG030612 9 of 9
APPLICATION GUIDE
Appendix: Troubleshooting
Standard Emitter Components and Assembly Zone 0 Emitter Components and Assembly
NOTE: Rings 1,2, and 3 are inserted beveled side up.