1Introduction1.1 General Description and PurposeThis meter upgrade kit replaces the AT-AUTO’s(tm) original “dingy colored”, incandescentbacklit meter with an improved-movement LED backlit meter. The original meter suffersseveral impairments: The meter scales were congested and the poor choice of power rangesof either 0 − 300W or 0 − 3000W limited the meter’s useful resolution. Additionally thesingle incandescent lamp was prone to burn-out and often produced a “hot-spot” effect inthe meter.The new meter provides ranges of 0 − 150W and 0 − 1500W and the scales have beensanitized, 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 uniformand pleasing illumination effect.The AT-AUTO(tm) meter upgrade kit comes with the items listed in Table 1.1 and shownin Figure 1.1.Table 1.1: AT-AUTO(tm) Meter Upgrade Kit ContentsQuantity Description1 LED-Backlit Meter – Printed Circuit Board Assembly1 Wiring Harness2 1.25 inch, 4-40 Hex Standoffs2 0.25 inch, 4-40 Pan–Head Machine Screws1 2 inch Length of #26 Tinned Copper Wire4 10Ω Surface Mount Resistors (Optional)www.KesslerEngineeringLLC.com