| Feature | Old 77 | New 179 | Testing Improvements |
| Accuracy | 0.3% | 0.09% | Three times more accurate |
| True-rms | No | Yes | Accurate on non-linear signals |
| Temperature | No | Yes | No need for a thermometer |
| Display size | Small | Large | Easier to read |
| Display backlight | No | Yes | Usable in dim areas |
| Frequency | No | Yes | Built-in frequency counter |
| Capacitance | No | Yes | Measure motor caps |
| Max. ac voltage | 750 | 1000 | Wider measurement range |
| Min/Max/Average | No | Yes | Capture intermittent problems |
|
FLUKE 179 Overvoltage category safety rating |
Not rated | CAT IV 600 |
Higher level of protection |


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