General Maintenance
Assembly Procedures
3
3-11
2. Replace the RS-232 connector ("O") on the rear of the chassis. Use a 3/16-inch nut
driver to tighten the connector hardware. Also, attach the ground wire at its chassis
connection.
3. Replace the power transformer along the right side of the chassis. Use four 6-32 x
.25 FHU screws ("N"), inserted from the exterior of the meter.
4. Snap the power plug into position.
5. Use needle nose pliers to replace the interior connections at the power plug.
3-27. Install the Battery Option
Installation is fully described in both the instruction sheet supplied with the Battery
Option and in Chapter 7 of this manual. The following procedure presents installation
essentials. Figures 7-2 and 7-3 can be used in identifying features and techniques
mentioned here.
1. Carefully slide the battery kit into the area reserved for it in the back of the meter.
Make sure that both the retaining slots line up and the mounting holes mate. Do not
pinch wires running from the circuit assembly to the battery terminals.
2. Secure the battery kit with two #6-32 x 1/4" panhead Phillips screws.
3. Attach the flat, white connecting cable at the Battery Option PCA. The single blue
marking line of the cable should be to the rear of the meter. Align the plastic socket
on the cable end, then seat it securely in place.
3-28. Install the Rms PCA
With the Analog Measurement Processor shields removed, solder the Rms PCA into
place on the upper side of the Main PCA. The component side of the Rms PCA faces
forward.
3-29. Install the Analog Measurement Processor Shields
The Analog Measurement Processor resides within a plastic shield on the top of the
Main PCA. Although having the appearance of a dark gray piece of plastic, this shield is
electrically conductive; treat it as you would any other conducting surface. On the
bottom of the Main PCA, the Analog Measurement Processor is protected with a
metallic shield.
Press the conductive plastic shield ("M") into place on the top of the Main PCA. From
the bottom of the Main PCA, install the metallic shield ("K".) Avoid contacting any
circuit traces during this procedure. Then replace the single Phillips head screw ("J")
securing the metallic shield.
3-30. Install the Main PCA
1. Prior to installing the Main PCA, verify the following:
• If necessary, reinstall the transformer insulator ("I"), tabs down, around the right
side of the transformer. Once the insulator is in place, pull each tab through the
Main PCA from bottom side with a needle nose pliers.
• If the nylon standoff ("L") used between the Main PCA and the metallic shield
surrounding the Analog Measurement Processor has been removed, verify that
proper orientation is maintained during installation. The standoff end with the
shorter, beveled indent fits into the metallic shield. Press the standoff end with
the wider, straighter indent into the Main PCA with a 3/16 nut driver.
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