How to Calibrate & Verify the A&D EK-6100i 6000 g × 0.1 g Balance
- pete8781
- Jul 31
- 3 min read
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A&D EK-6100i calibration uses external reference weights, with MNM listing 6,000 g as the default calibration mass. The balance’s 0.1 g repeatability and ±0.2 g linearity make it important to verify more than one load point when the station is used across a wide 6 kg range. EK-6100i is non-NTEP, so this calibration workflow is governed by the user’s internal quality system rather than legal-for-trade sealing requirements.
Prepare a stable 6 kg-capable station
Level the balance, make sure the pan and container touch nothing else, and use a rigid bench that does not flex under several kilograms. Avoid fans, vibration and rapidly changing temperature. A large container can catch airflow or touch the housing more easily than a small calibration weight, so validate the actual load geometry before concluding the balance is unstable.
External calibration with 6000 g
Use a suitable known 6,000 g reference and follow A&D’s EK-i external calibration procedure. Center the mass, wait for stability and avoid bench contact while the point is captured. If a different user-definable calibration mass is permitted and used, document it in the SOP. Calibration references should have known accuracy appropriate for the process rather than being ordinary shop objects of uncertain mass.
Multi-point verification
After calibration, confirm zero and verify with independent values representative of the real workload. A station used at 200 g, 2 kg and 5 kg benefits from checks near those regions rather than only a full-scale mass. If the error changes with load, verify the reference weights and arrange service for a stable linearity problem instead of repeatedly recalibrating at the top of the range.
Repeatability and eccentric loading
Repeat the same known load several times with a complete unload between readings to assess the 0.1 g repeatability expectation. Then compare representative pan positions if real containers are often placed off center. A large position-dependent difference suggests pan seating, leveling or mechanical interference. Calibration cannot compensate for a load partially supported by the bench or housing.
Static, air movement and temperature
Plastic vessels and dry materials can generate static; wide containers can respond to airflow; hot or cold samples create convection. If the reading changes when a hand approaches the container or when HVAC cycles, correct the environment before calibration. The balance can be functioning correctly while an external force moves the displayed value.
Underhook verification
When EKW-07i underhook weighing is used, verify the complete suspended setup. Hanging hardware, support points and samples must move freely without touching the table or enclosure. A setup that passes normal pan verification can still be wrong below the balance if the fixture rubs or the suspension geometry changes.
RS-232 troubleshooting
A correct local display plus missing or corrupted computer data points to the serial path, not calibration. Check cable wiring, baud/parity settings, data format and output mode. If both the local display and transmitted result fail the same known-weight check, troubleshoot the weighing system first. This separation prevents needless calibration adjustments and preserves evidence for root-cause analysis.
Frequently asked questions
What default calibration mass does MNM list? 6,000 g. What are repeatability and linearity? 0.1 g and ±0.2 g. Should a 6 kg-range balance be verified at multiple points? Yes when the process spans a broad range. Does EK-6100i support underhook weighing? Yes. What if pan position changes the result? Investigate eccentric loading/mechanical contact. What if only serial data is wrong? Troubleshoot RS-232C. Does calibration make EK-6100i legal for trade? No; the exact model remains non-NTEP.
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