Product Description
Confident balance calibration starts with mass standards whose class and certification match the job. These OHAUS ASTM calibration weight sets and two-weight CalPak kits deliver Class 1 and Class 4 tolerances in protective cases, with no certificate, non-accredited or ISO/IEC 17025 accredited certification options.
This listing is for OHAUS item number 30391039: ASTM Class 4 Calibration Weight Set, 500 mg-1 mg, 12 Pieces, with Non-Accredited Calibration Certificate,. Gram weights are two-piece stainless steel alloy construction, while milligram weights are one-piece stainless steel, with aluminum used below 5 mg in the fractional sets. Class 1 serves as a primary reference for calibrating high-precision balances with readability down to 0.1 mg and for maintaining traceability to lower-class weights, while Class 4 suits routine checks of precision and toploading balances. Handle weights with gloves or forceps and store them in the case to protect their calibrated values. LIGHT LABS ships genuine OHAUS products and can help you match accessories and parts to your instrument.
Key Features
- ASTM Class 1 and Class 4 – tolerances for analytical and precision balance work
- Certification Choices – no certificate, non-accredited or ISO/IEC 17025 accredited
- Two-Piece Construction – weights 1 g and above, one-piece below 1 g
- CalPak Kits – two- and three-weight packs matched to common balance capacities
- Protective Case – every set ships in a fitted case
Specifications
| Item Number | 30391039 |
| Brand | OHAUS |
| Description | ASTM Class 4 Calibration Weight Set, 500 mg-1 mg, 12 Pieces, with Non-Accredited Calibration Certificate, |
| Calibration Certificate | Traceable Certificate |
| ASTM Class | 4 |
| Weight Set Range | 500 mg - 1 mg |
| Set Capacity | 1 g |
| Set Total Pieces | 12 |
| Protective Case | Included |
| Construction | One-piece |
| Density at 20°C | Below 5 mg are 2.70 g/cm3;500 mg to 5 mg are 7.95 g/cm3 |
| Dimensions in Case | 4.5 in x 3.5 in (11.43 cm x 8.89 cm) (HxØ) |
| Set Contents | 100 mg;10 mg;(2) 200 mg;(2) 20 mg;5 mg;(2) 2 mg;50 mg;500 mg;1 mg |
| Weight Material | Weights 5 mg through 500 mg are 304 Stainless Steel. Weights below 5 mg are 3003-H14 Aluminum |
| Wgt Origin (USA) | USA |
Related Models
- 80859548 – ASTM Class 1 CalPak Calibration Weight Kit, 100 g and 5 g, with Accredited Calibration Certificate,
- 80859551 – ASTM Class 1 CalPak Calibration Weight Kit, 1 kg and 50 g, with Accredited Calibration Certificate,
- 80859549 – ASTM Class 1 CalPak Calibration Weight Kit, 200 g and 10 g, with Accredited Calibration Certificate,
- 80859554 – ASTM Class 1 CalPak Calibration Weight Kit, 200 g, 20 g and 20 mg, with Accredited Calibration Certificate,
- 80859545 – ASTM Class 1 CalPak Calibration Weight Kit, 2 g and 100 mg, with Accredited Calibration Certificate,
- 80859552 – ASTM Class 1 CalPak Calibration Weight Kit, 2 kg and 100 g, with Accredited Calibration Certificate,
- 80859550 – ASTM Class 1 CalPak Calibration Weight Kit, 500 g and 20 g, with Accredited Calibration Certificate,
- 80859546 – ASTM Class 1 CalPak Calibration Weight Kit, 5 g and 200 mg, with Accredited Calibration Certificate,
- 80859553 – ASTM Class 1 CalPak Calibration Weight Kit, 5 kg and 200 g, with Accredited Calibration Certificate,
- 30391333 – ASTM Class 1 Calibration Weight Set, 20 g-100 mg, 10 Pieces, No Certificate,
- 30391543 – ASTM Class 1 Calibration Weight Set, 20 g-100 mg, 10 Pieces, with Non-Accredited Calibration Certificate,
- 30391199 – ASTM Class 4 Calibration Weight Set, 20 g-100 mg, 10 Pieces, No Certificate,
- 30391044 – ASTM Class 4 Calibration Weight Set, 20 g-100 mg, 10 Pieces, with Non-Accredited Calibration Certificate,
- 30391342 – ASTM Class 1 Calibration Weight Set, 200 g-1 g, 10 Pieces, No Certificate,
Applications
- Analytical balance calibration
- Precision balance verification
- Routine daily balance checks
- ISO 17025 and GLP quality programs
- Reference standard traceability
