Replacing The Bottom Case Assembly - Fluke 79 III Calibration Information Manual

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Calibration Information
4. Ensure that the rotary switch and circuit board switch are in the
5. Reinstall the top case as described in "Reassembling the Meter Case."

Replacing the Bottom Case Assembly

To avoid contamination with oil from the fingers, handle the pca by the edges
or wear gloves. PCA contamination may not cause immediate instrument
failure in controlled environments. Failures typically show up when
contaminated units are operated in humid areas.
Refer to Figure 4, and use the following procedure to remove the subassembly and replace the bottom case
assembly:
1. Remove the top case as described under "Opening the Meter Case."
2. Remove the F2 (F11 A) fuse to access the screw that holds the subassembly to the bottom case (refer to
"Replacing Fuses").
3. The subassembly may now be removed.
4. Install a new bottom case onto the pcb.
5. Reinstall the top case as described in "Reassembling the Meter Case."
10
Caution
F2
Screw
Figure 4. Removing the Subassembly
OFF position.
pd006f.eps