Specifications
| Measurement range | 0~5.0D |
| Measurement area | φ 2mm (light hole diameter) |
| Repeatability Error | ±0.01D |
| Measurement error | (0.00D~3.00D) ±0.02D；(3.00D~4.00D) ±0.03D；(4.00D~5.00D) ±0.04D |
| Display mode | Three-bit segment code LCD screen |
| adapter | Dedicated adapter, 8.4V 1000mA |
| Battery Capacity | 2.2Ah |
| Charging time | ≤ 2h |
| standby time | ≥ 24h (actual 28 hours) |
| Working time | ≥ 4h (actual 5 hours) |
| Power consumption of the whole machine | ≤ 4W |
| Operating Environment | 0~40 ℃, Relative Humidity ≤ 85% |
| Dimensions | 210*100*110mm |
| Machine Weight | 1.5Kg |
Packing list
After-sales instructions
None
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/29466/Specification.html , which is only used by users who purchase commodities from the NBCHAO.