Tachometer Test: Spectrum
Install a test tachometer to vehicle. Vehicle tachometer should be replaced if reading deviates from specification. See SPECTRUM TACHOMETER ALLOWABLE ERROR RANGE table
SPECTRUM TACHOMETER ALLOWABLE ERROR RANGE
| Standard Indication (RPM) | Allowable Error Range (RPM) |
|---|---|
| 1000 | 900-1100 |
| 2000 | 1900-2100 |
| 3000 | 2850-3150 |
| 4000 | 3800-4200 |
| 5000 | 4750-5250 |
| 6000 | 5700-6300 |