Zn-401s Manual Review

| Part Description | Example Part No. (from manual) | |------------------|--------------------------------| | Weighing pan | ZN-401S-PAN | | Load cell (100g capacity) | ZN-401S-LC100 | | LCD display | ZN-401S-DISP | | Rubber keypad membrane | ZN-401S-KEY | | RS232 to USB adapter (suggested) | Generic (CH340 chipset) |

| Frequency | Action | Tools Needed | |-----------|--------|---------------| | Daily | Clean pan and wind ring (if applicable) | Dry microfiber cloth | | Weekly | Check bubble level | None (visual inspection) | | Monthly | Test calibration with a known weight | Certified test weight | | Quarterly | Remove dust from ventilation slots | Canned air / soft brush | | Annually | Factory recalibration (professional) | Send to certified lab | zn-401s manual

If you cannot locate your manual today, bookmark this guide and use the troubleshooting tables above. And remember: when in doubt, press TARE first, and consult the error code section before assuming your device is broken. | Part Description | Example Part No