Siemens milltronics ILE-37 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.com/processautomation
Email: [email protected]
AG050425
Milltronics ILE-37 Sensing Head Diaphragm Replacement
Objective: The procedure for replacing the diaphragm on a Milltronics ILE-37 sensing head.
Equipment: • Milltronics ILE-37
• Replacement diaphragm
• 1 ¾" or 45 mm wrench, or adjustable
wrench
• 10 mm wrench
• 6 mm hex screwdriver or Allen key
• 5 mm Allen key
• 2.5 mm hex screwdriver or Allen key
While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or implied.
Overview:
To replace the diaphragm on a Milltronics ILE-37, please follow the directions below.
For an ILE-37 that does not have an LVDT conditioner card, skip
Part One: Step Four and Part Two: Step Three
Part One: Remove Diaphragm
Step One: Remove Fiberglass Cover
1. Use 6 mm hex screwdriver or Allen key to loosen the
four bolts connecting the fiberglass cover to the
main body.
2. Remove the four bolts and washers.
3. Remove fiberglass cover.
APPLICATION GUIDE

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APPLICATION GUIDE
Step Two: Remove Sensing Plate
1. Use 10 mm wrench to loosen the nut
holding the set screw in place.
2. Use 5 mm hex screwdriver or Allen
key to loosen the set screw.
3. Remove the sensing plate by twisting
shaft back and forth, while pulling
outward.
Step Three: Remove Bushing Lock Nuts
1. Use 1 ¾" or 45 mm wrench, or adjustable wrench to
remove the two bushing lock nuts, one at a time.
2. Remove protective plastic ring.
CAUTION: Do not use hammer or excessive force!

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APPLICATION GUIDE
Step Four: Remove LVDT Conditioner Card
1. Use 2.5 mm hex screwdriver or Allen key to remove
the two screws, using your free hand to steady the
LVDT conditioner card.
2. Remove two nylon washers and two metal spacers.
3. Remove LVDT conditioner card and place on a dry,
secure surface.
Step Five: Separate Inner Diaphragm Ring from ILE-37 Body
1. Use 5 mm Allen key to remove the four screws connecting the inner diaphragm
ring to the ILE-37 body.
2. Separate the inner diaphragm ring
from the ILE-37 body.
CAUTION: Do not touch circuitry on LVDT conditioner card!

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APPLICATION GUIDE
Step Six: Remove Diaphragm
1. Gently pinch the diaphragm on sensing head side.
2. Pull the diaphragm outward to remove.
Part Two: Replace Diaphragm
Step One: Insert New Diaphragm
1. Place the new diaphragm around the sensing head
shaft socket and push through to the opposite side.
2. Adjust the position of the new diaphragm, so that it
is flat against the ILE-37 body.
3. Line up the holes of the new diaphragm with the
holes on the ILE-37 body.

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APPLICATION GUIDE
Step Two: Secure Inner Diaphragm Ring
1. Line up the holes of the inner diaphragm ring with
the holes of diaphragm and the holes on the ILE-37
body.
2. Replace the four screws that connect the inner
diaphragm ring to the ILE-37 body.
3. Use 5 mm Allen Key to firmly tighten the four
screws.
Step Three: Replace LVDT Conditioner Card
1. Place metal spacers vertically over the screw holes.
2. Line up holes on LVDT conditioner card with the
holes of the spacers.
3. Replace the two nylon washers over the holes on
the LVDT conditioner card.
4. Use 2.5 mm Allen key to replace the two screws.
CAUTION: Do not touch circuitry on LVDT conditioner card

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APPLICATION GUIDE
Step Four: Replace Bushing Lock Nuts
1. Replace protective plastic ring on sensing plate side.
2. Replace the first bushing lock nut.
3. Hand tighten the first bushing lock nut, until it is snug
against the protective ring.
4. Replace second bushing lock nut.
5. Use 1 ¾" or 45 mm wrench, or adjustable wrench
to firmly tighten the second bushing lock nut.
Step Five: Replace Sensing Plate
1. Place shaft of sensing plate into
sensing head shaft socket.
2. Push inward and twist sensing plate
until it cannot move further.
3. Line up channel at end of sensing
plate shaft with roll pin and push shaft
into place.
4. Use 5 mm hex screwdriver or Allen
key to tighten the set screw.
5. Use 10 mm wrench to tighten the nut
holding the set screw in place.
CAUTION: Do not over tighten!
CAUTION: Do not use hammer or excessive force!
roll pin

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APPLICATION GUIDE
Step Six: Replace Fiberglass Cover
1. Replace the fiberglass cover.
2. Line up the holes of the fiberglass cover with the
holes in the main body.
3. Replace the four screws and washers that attach
the fiberglass cover to the unit.
4. Use 6 mm hex screwdriver or Allen key to tighten
the four screws.