1
Introduction
1.1 General Description and Purpose
This meter upgrade kit replaces the AT-AUTO’s(tm)original “dingy colored”, incandescent
backlit meter with an improved-movement LED backlit meter. The original meter suffers
several impairments: The meter scales were congested and the poor choice of power ranges
of either 0 −300W or 0 −3000W limited the meter’s useful resolution. Additionally the
single incandescent lamp was prone to burn-out and often produced a “hot-spot” effect in
the meter.
The new meter provides ranges of 0 −150W and 0 −1500W and the scales have been
sanitized, removing the clutter, improving resolution, and making the meter easier to read.
The improved meter is also backlit with three white LEDs, providing a much more uniform
and pleasing illumination effect.
The AT-AUTO(tm)meter upgrade kit comes with the items listed in Table 1.1 and shown
in Figure 1.1.
Table 1.1: AT-AUTO(tm)Meter Upgrade Kit Contents
Quantity Description
1 LED-Backlit Meter – Printed Circuit Board Assembly
1 Wiring Harness
2 1.25 inch, 4-40 Hex Standoffs
2 0.25 inch, 4-40 Pan–Head Machine Screws
1 2 inch Length of #26 Tinned Copper Wire
4 10Ω Surface Mount Resistors (Optional)
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