Campbell Scientific CS110 Electric Field Meter - Manual (Page 58)

Appendix D. Servicing the CS110
CS110 panel board, after removing the two thumb screws on the CR1000
module.
When installing a CR1000 into the CS110 case, first check for proper
orientation of the three 40-pin connectors that interface to the CS110 panel
board. Once proper connector orientation is verified, set the CR1000 into the
CS110 case and feel for proper positioning of the three 40-pin connectors.
When the connector shrouds are engaged, press down firmly on the CR1000 to
mate the connector pins, prior to engaging the two thumb screws on the CR1000
module. Replace the desiccant holder bracket and desiccant after tightening the
thumb screws.
D.3 Changing Out Motor Assembly
First remove the CR1000 by removing the desiccant holder bracket along with
the two thumb screws on the CR1000 module. Next remove the black anodized
interface plate between the CR1000 and CS110 panel board. Unplug the three
locking electrical connectors on the CS110 panel board from the motor
assembly.
Remove the stator by loosening the 2 Philips head screws located on the
underside of the CS110. Next remove the four Philips head screws that attach
the motor assembly to the white powder-coated aluminum case. With the four
screws removed, carefully break it free from the bond to the gasket and allow it
to be removed through the bottom of the CS110 case. Be sure to check the
integrity of the motor assembly gasket on the CS110 case before replacing the
motor assembly.
Replacement of the motor assembly invalidates the factory
calibration of a CS110 because of possible dimensional
differences between assemblies. NOTE
D.4 Changing Out the CS110 Panel Board Assembly
First remove the CR1000 by removing the desiccant holder bracket along with
the two thumb screw on the CR1000 module. Next remove the black anodized
interface plate between the CR1000 and CS110 panel board.
Next remove the mounting posts that support the black anodized interface plate
followed by the two Phillips head screws by the motor assembly that attach the
CS110 panel board PCB to the CS110 case. Disconnect the three locking
electrical connectors that connect signals between the CS110 panel board and
the motor assembly. Next remove the plastic nuts from the circular connectors
on the outside of the CS110 case. The CS110 panel board should now be free
and can be maneuvered out of the case.
Reverse the above procedure when installing a CS110 panel board PCB. Make
sure that the circular connectors each have a functional o-ring before placing the
CS110 panel board inside the CS110 case. The plastic nuts on the circular
connectors should be tightened to a torque of 10-12 inch
⋅lbs.
Readers are referred to Section 10 on Maintenance for instructions on how to
clean the CS110 electrodes and change desiccant in the sealed CS110 case.
D-2