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| Standard Edition | $ 49 |
| Professional Edition | $ 99 |
| Enterprise Edition | $ 399 |
| Symptom | Likely Cause | Fix |
|---------|--------------|-----|
| Won't zero | Debris on platter | Clean platter, remove weight |
| Unstable weight | Draft/vibration | Move scale to solid surface |
| Err 1 | Overload (>max capacity) | Remove weight immediately |
| Err 5 | Invalid tare (tare > weight) | Clear tare, re-zero |
| Err 8 | PLU not found | Re-enter or program PLU |
| Display dim | Low battery | Charge or plug in AC |
| Key stuck | Sticky residue | Clean around key with alcohol |
Digi released four variants of the SM500. Your manual’s instructions change based on the sticker on the bottom.
| Model Code (Bottom Sticker) | Max Capacity | Readability | Exclusive Note | | :--- | :--- | :--- | :--- | | SM-500A | 500g | 0.01g | Jewelry grade – comes with wind shield. Do not use PCS mode. | | SM-500B | 5000g | 0.1g | Kitchen/Postal – has stronger load cell. PCS mode works best. | | SM-500C | 500g | 0.1g | Lab basic – fastest stabilization time (<1 sec). | | SM-500F | 500g | 0.01g | Forensic/Pharma – requires annual calibration by law. | digi sm500 scale user manual exclusive
Check your sticker now. If it ends with “-R” (Refurbished), your auto-shutdown is permanently set to 2 minutes; you cannot override it.
While most scales store items, the SM-500 manual details an extensive PLU structure. | Symptom | Likely Cause | Fix |
No other manual explains these errors clearly. Here is the exclusive Digi SM500 error code dictionary.
| Error Code | Meaning | Exclusive Fix | | :--- | :--- | :--- | | EEEEE | Overload – Item exceeds max capacity (typically 500g or 5000g model dependent). | Remove weight immediately to avoid sensor damage. Long-term fix: Do not exceed 105% of max. | | LO | Low battery. | Replace batteries. Exclusive: If using AC adapter, LO indicates a dying power supply – replace adapter, not batteries. | | UnSt | Unstable environment – vibration, air flow, or thermal shock. | Move scale away from fans, open windows, or heavy machinery. Wait 30 seconds. | | C Err | Calibration error – weight was removed too early or wrong mass. | Restart calibration. Ensure weight is exactly as requested. | | Err 2 | ADC failure – Analog-to-digital converter fault. | This often resolves by removing batteries + AC for 10 minutes (hard reset). If persists, return for service. | | 0.0 but weight present | Dead zone or sensor stuck. | Tap the pan lightly 5-6 times. Use a can of compressed air to blow under the pan edges. | Digi released four variants of the SM500
The manual dedicates a chapter to legal-for-trade compliance.
Contrary to popular belief, Digi does provide support for the SM500, but they hide the portal.
The Digi SM-500 User Manual reveals that the device is more than a simple scale; it is a programmable retail terminal. The "exclusive" value of the manual lies in its detailed instructions regarding:
| Standard Edition $ 49 | Professional Edition $ 99 | Enterprise Edition $ 399 |