When checking a fan motor run capacitor to ground with an analog ohmmeter, what resistance scale should be used?

Using an analog ohmmeter to check a fan motor run capacitor to ground requires selecting an appropriate resistance scale to ensure accurate readings. The choice of the resistance scale affects both the sensitivity of the measurement and the ability to interpret the results correctly.

Choosing the r x 10K scale is appropriate for testing capacitors because it allows for a balance between sensitivity and range. Many run capacitors will show a resistance in this range when they are functioning properly; this scale can help identify the initial charge then determine if it discharges appropriately, which is crucial for assessing the capacitor's health. If a higher scale such as r x 100K were used, it could lead to difficulties in getting an adequate reading since the higher resistance can mask lower values that indicate capacitor health. On the other hand, scales like r x 1K or r x 5K might saturate the meter, yielding misleading readings since the capacitor would present higher resistance.

By using the r x 10K resistance scale, you maximize your chances of obtaining a reliable reading that reflects the capacitor's condition accurately.