Measuring Cell Assembly Removal And Replacement - Siemens 7MF4333 User Manual

UMSITRPDS3-1
Installation
1. Remove the new electronics module from its anti-static bag.
2. Carefully align the connector on the measuring cell board with the connector on the back of the new
electronics module. Press the board onto the electronics module until the board is seated fully and the
flexible clips grip the board.
3. Move the electronics assembly close to the housing. Guide the measuring cell cable so that it folds
between the two long feed-thru pins (5). Align the mounting holes in the electronics module with the
holes in the casting. Press the electronics module into the enclosure. The two long pins must enter the
two single pin receptacles (6) on the back of the module. Press the module in while gently rocking the
module until it can be pressed in no farther.
4. Install the two hex standoffs. Tighten the standoffs securely but do not over tighten and damage the
electronics module.
5. Install the display as described in the previous section.
6. Install the enclosure cap by turning it clockwise until the O-ring contacts the enclosure. Turn the cap
one additional turn to compress the O-ring.
7. Apply power to the transmitter. Refer to the table in Section 7.4 and to Section 6 On-Line
Configuration and Operation and configure the transmitter.

7.4.3 Measuring Cell Assembly Removal and Replacement

The measuring cell assembly is not field repairable. It must be replaced if defective. The transmitter must
be removed to a workbench to accomplish removal and replacement.
A measuring cell assembly consists of the cell, process flanges (differential construction, as specified),
measuring cell cable, measuring cell board and an O-ring.
Removal
1. Refer to Section 7.6 Transmitter Replacement and disconnect and remove the transmitter from
service. Move transmitter to service shop.
2. Remove the enclosure cap for access to the display and electronics module.
3. If an optional display is installed, remove it as described in Section 7.4.1. Store the display in a static
protective bag.
4. Remove the electronics module as described in Section 7.4.2.
5. Use a 3/32" (2.5mm) Allen wrench to loosen the enclosure rotation screw, located below the tag
plate.
November 2010
Calibration And Maintenance
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