| | Manufacturer | Part No | Description | Available | Price |
| Buy | Gigatronics | 21340 | 8540 Series Gigatronics 8540 Series Universal Power Meters Operating and Maintenance Manual (201548) | 1 | $50.00 |
| Buy | Gigatronics | 21700 | 8540B: Universal Power Meters Operation & Maintenance Manual. January 1996. (109069) | 1 | $50.00 |
| Buy | Gigatronics | 30280 | 8540C: Universal Power Meters Operating & Maintenance Instructions. January 1998. Revision Level: F. (109071) | 1 | $50.00 |
| Buy | Gigatronics | 31470 | Series 8650A Gigatronics Series 8650A Universal Power Meters Operation Manual (201652) | 1 | $50.00 |