METTLER TOLEDO 2888 Deckmate Floor Scales Installation and Service Manual
(10/96)
Load Cell
Replacement
Procedure
Remove power to the digital indicator and disconnect the instrument
cable.
Remove the junction box cover plate from the top of the side rail of the
deck to gain access to the junction box. Locate the defective load cell
terminal.
Disconnect the defective load cell cable from its’ terminal on the
summing PCB.
Loosen the cable connector on the junction box and remove the cable
from the enclosure.
Carefully remove the deck from the support frame. Position the deck
upside down onto a stable support that allows access to the defective cell
and cable as well as offering protection to the other cells during
disassembly.
Affix a string to the end of the defective load cell’s cable. The string
should be of sufficient strength and length to pull the new load cell’s
cable through the platform structure.
The load cells are fastened to the platform using two 1/2”-13 UNC high
strength socket head cap screws. Remove the two load cell mounting
screws with a 3/8” hex allen socket, retaining the screws for
reinstallation. Lift the load cell from the mounting surface .
Carefully pull the defective load cell’s cable through the platform while
feeding the string in at the junction box opening. Once the string is at the
load cell location, unattach it from the load cell cable.
Remove the rocker pin with o-rings from the defective load cell and
reinstall it in the new load cell.
Attach the new load cell’s cable to the pulling string and carefully thread
the new cable through the platform into the junction box opening. Coil
and store any excess cable within the platform side channel.
Secure the new load cell to the platform. Apply an anti-seize compound
such as “Never-Seez” to the threads of the mounting screws and tighten
with a calibrated torque wrench to 100 ft-lb (Mild Steel Scales) or 75 ft-lb
(Stainless Steel Scale).
Verify that the load cell has proper overload gap: 0.009"- 0.014"
Note: The instrument cable may need
to be removed from the junction box to
allow the platform to be removed.
Notes: Make sure load cell and
platform mounting surfaces are free of
grease and other foreign materials.
Note: The load cells are fastened to
the stainless steel platforms using
(2) 1/2-13 UNC S.S. Hex. Hd.
Screws.
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