Product Description
Keep every balance in your lab honest with a single, correctly classed reference mass that you can trace back to a recognized standard. This group of OHAUS ASTM individual calibration weights covers nominal values from 200 mg to 25 kg in ASTM Class 1, 2 and 4, so you can match tolerance to the readability of the balance or scale being tested. Each value is offered with no certificate, a non-accredited traceable certificate, or an ISO/IEC 17025 accredited certificate, letting you pay only for the documentation your quality system requires.
This listing is for OHAUS item number 30391537: ASTM Class 1 Calibration Weight, 25 kg, Two-Piece EB Grip Handle, with Accredited Calibration Certificate. Weights are manufactured in the USA to the tolerances of ASTM E617, using non-magnetic stainless steel so that density and magnetic effects stay within class limits. By style, milligram values are one-piece flat weights; gram and kilogram values are two-piece designs with an adjusting cavity, offered as knob-style cylinders or EB-style straight cylinders and grip-handle weights at the heavy end. Handle them with gloves, forceps or a lifting tool, keep them in their storage case between uses, and recalibrate on a fixed interval to maintain traceability. Add it to your LIGHT LABS order and keep your lab running with genuine OHAUS equipment.
Key Features
- ASTM E617 Classes 1, 2 and 4 – Choose the tolerance class that fits your balance, from Class 1 reference work to Class 4 routine checks
- Three Certificate Levels – Order with no certificate, a non-accredited traceable certificate, or an ISO/IEC 17025 accredited certificate
- Corrosion-Resistant Stainless Steel – Non-magnetic stainless alloys hold their mass and resist wear in everyday lab use
- Two-Piece Adjustable Construction – Gram and kilogram weights have a sealed adjusting cavity so the mass can be restored during recalibration
- Multiple Body Styles – Knob-style, straight cylindrical, grip-handle and flat milligram forms suit different balance pans and handling needs
- Made in the USA – Weights in this group are produced in the United States
Specifications
| Item Number | 30391537 |
| Brand | OHAUS |
| Description | ASTM Class 1 Calibration Weight, 25 kg, Two-Piece EB Grip Handle, with Accredited Calibration Certificate |
| Calibration Certificate | ISO/IEC 17025 Accredited Certificate |
| ASTM Class | 1 |
| Weight Value | 25 kg |
| Design | Grip handle |
| Protective Case | Not Included |
| Uncertainty | 12 mg |
| Construction | Two-piece |
| Density at 20°C | 7.85 g/cm3 |
| Dimensions | 7.46 in x 5.97 in (18.959 cm x 15.177 cm) (HxØ) |
| Weight Material | 303 Stainless Steel |
| Weight Tolerance | 62 mg |
| Wgt Origin (USA) | USA |
| Standard | ASTM E617 |
| ASTM Classes in This Group | 1, 2 and 4 |
| Nominal Values in This Group | 200 mg to 25 kg |
| Certificate Options | No Certificate; Non-Accredited (Traceable); ISO/IEC 17025 Accredited |
| Country of Origin | USA |
Related Models
- 30391317 – ASTM Class 4 Calibration Weight, 200 g, Two-Piece Knob Style, with Accredited Calibration Certificate
- 80780136 – ASTM Class 4 Calibration Weight, 200 g, Two-Piece EB Cylindrical, with Accredited Calibration Certificate
- 30391151 – ASTM Class 4 Calibration Weight, 200 g, Two-Piece EB Cylindrical, with Non-Accredited Calibration Certificate
- 30391097 – ASTM Class 4 Calibration Weight, 200 g, Two-Piece Knob Style, with Non-Accredited Calibration Certificate
- 80781119 – ASTM Class 1 Calibration Weight, 200 mg, One-Piece Flat, No Certificate
- 80781120 – ASTM Class 1 Calibration Weight, 200 mg, One-Piece Flat, with Accredited Calibration Certificate
- 30391584 – ASTM Class 1 Calibration Weight, 200 mg, One-Piece Flat, with Non-Accredited Calibration Certificate
- 80780066 – ASTM Class 4 Calibration Weight, 200 mg, One-Piece Flat, No Certificate
- 80850290 – ASTM Class 4 Calibration Weight, 200 mg, One-Piece Flat, with Accredited Calibration Certificate
- 30391085 – ASTM Class 4 Calibration Weight, 200 mg, One-Piece Flat, with Non-Accredited Calibration Certificate
- 30391487 – ASTM Class 1 Calibration Weight, 24 kg, Two-Piece EB Grip Handle, No Certificate
- 30391536 – ASTM Class 1 Calibration Weight, 24 kg, Two-Piece EB Grip Handle, with Accredited Calibration Certificate
- 30391518 – ASTM Class 1 Calibration Weight, 24 kg, Two-Piece EB Grip Handle, with Non-Accredited Calibration Certificate
- 30391137 – ASTM Class 4 Calibration Weight, 24 kg, Two-Piece EB Grip Handle, No Certificate
Applications
- Routine daily and weekly balance performance checks
- Calibration of analytical, precision and top-loading balances
- ISO 9001, GLP and GMP quality-audit documentation
- Repeatability, linearity and eccentricity testing
- Replacing lost or out-of-tolerance weights in an existing kit
- Industrial bench and floor scale verification
