Fluke 1577, Руководство по калибровке

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Calibration
12
Removing the Bottom Case
With the battery door removed, the next step in disassembling the Meter is to remove
the bottom case. Use the following procedure to remove the bottom case:
Note
When removing the back case, it is not necessary to remove the fuse or
the batteries.
1. Locate the four Phillips head screws on the bottom case, two next to the batteries
and two next to the fuse.
2. Using a Phillips screwdriver, remove the four screws.
3. Separate the front and bottom cases at the fuse-end of the Meter. Tilt the freed
end of the case up, and lift it away from the top case.
To install the bottom case, first, position and press together the display-end of the top
and bottom cases. Then, prior to installing all four screws, press the fuse-end of the
cases together.
Removing the PCA
With the bottom case removed, the next step in disassembling the Meter is to remove
the printed circuit assembly (PCA). Refer to Figure 4 and use the following procedure
to remove the PCA:
1.
One Phillips screw attaches the PCA to the top case. Locate the screw near the
center of the PCA, and remove it.
2. Two chrome-plated springs on the PCA form an electrical connection (clip) to the
two recessed INSU) terminals on the top case. Break these
connections by carefully pulling each of the springs back and away from the
terminals. See Figure 5.
3. With one hand over the PCA, roll the top case over (face up) and lift it away from
the PCA.
Note
Three red and one black plastic shields are used to isolate the user from
the input terminals. With the PCA removed, these shields are loose and
can fall away from the PCA.
4. Remove and set aside all four shields for use during reassembly.
XW
Warning
To avoid risk of electrical shock, make sure the plastic input
terminals are properly positioned on the PCA before
attaching it to the top case.
When installing the PCA, proceed as follows:
1.
With the PCA face-up, place all four plastic shields into position on the PCA.
2. Lower the top case onto the PCA, and roll both parts over (PCA up).
3. Connect (snap) the chrome-plated springs to the
INSULATION
terminals.
4. Install the screw that attaches the PCA to the top case.