Quick Answer
Prism Calibration Centre (NABL CC-2480) provides NABL-certified weighing balance calibration in Ahmedabad for analytical balances (0.0001 g), precision balances, counting scales, platform scales, and weighbridges — per OIML R 76, ISO 8655, and NABL guidelines.
Key Takeaways
- Weighing balance calibration range: 1 mg (analytical) to 10,000 kg (truck weighbridge).
- Uses NABL-calibrated OIML Class E2/F1 weights as reference standards.
- Mandatory for pharma (Schedule M, FDA 21 CFR Part 11), food (FSSAI), and chemical QC labs.
- Calibration per OIML R 76, EURAMET cg-18, and manufacturer specifications.
- On-site balance calibration available to avoid disturbing level-sensitive instruments.
Types of Weighing Instruments We Calibrate
| Instrument Type | Typical Range | Application |
|---|---|---|
| Micro/Analytical Balance | 0.0001 g to 220 g | Pharma QC, R&D, Gold assay |
| Precision Balance | 0.01 g to 10 kg | Chemical dispensing, food formulation |
| Top Pan Balance | 0.1 g to 60 kg | Industrial QC, raw material |
| Platform Scale | 0.1 kg to 1000 kg | Manufacturing, logistics |
| Bench Scale | 0.01 kg to 150 kg | Retail, food industry |
| Crane Scale (Hook Scale) | 1 kg to 50,000 kg | Engineering, steel mills |
| Weighbridge | 5,000 kg to 200,000 kg | Logistics, mining, agriculture |
Weighing Balance Calibration for Pharma in Ahmedabad
Ahmedabad is one of India's top pharmaceutical manufacturing hubs, with 500+ pharma units in Vatva, Narol, and Odhav. FDA 21 CFR Part 211, Schedule M (Drugs and Cosmetics Act), and ICH Q7 all mandate calibration of weighing balances used in API, formulation, and QC labs. An uncalibrated balance causing a 0.5% weighing error in a 100-kg batch translates to 500 g of active ingredient error — a critical quality failure.
Pharma Requirement
WHO GMP, USFDA, and EU GMP all require analytical balance calibration at least annually, with daily performance verification (zero check, span check with calibrated weights). Prism provides both annual NABL calibration and OIML-traceable calibrated weight sets.
Weighing Balance Calibration Procedure
Level Check
Verify the balance is level using the bubble level. Adjust levelling feet if required. Level is critical for accuracy.
Warm-Up
Allow the balance to warm up per manufacturer specification (typically 30 min to 2 hr for analytical balances).
Zero Check
Check and record the zero reading (tare) with no load. Acceptable zero drift is < 1 division.
Calibration Weights
Apply NABL-calibrated OIML Class E2/F1 weights at 5–10 load points from minimum to maximum capacity.
Repeatability Test
Apply the same weight 5–10 times at mid-capacity to determine repeatability (standard deviation).
Eccentricity Test
Place weight at 4 corner positions of the pan to check eccentricity error.
Certificate Issue
Issue NABL certificate with as-found/as-left data, repeatability, eccentricity, expanded uncertainty, and OIML weight traceability.
Frequently Asked Questions
How often should weighing balances be calibrated?
Annual NABL calibration is the standard. Analytical balances used in pharma QC should also have daily performance verification. Balances in legal-for-trade applications (retail, export) require periodic verification by Weights & Measures department.
What OIML class weights does Prism use for balance calibration?
Prism uses OIML Class E2 weights (highest precision, uncertainty < 0.003%) for analytical balance calibration and Class F1 weights for precision and platform scales.
Can Prism calibrate balances on-site?
Yes. On-site balance calibration is recommended for large platform scales, crane scales, and weighbridges that cannot be transported. Prism's mobile team brings certified OIML reference weights to your facility.
Is balance calibration required for ISO 9001 compliance?
Yes. ISO 9001:2015 Clause 7.1.5.2 specifically requires monitoring and measuring resources (including balances) to be calibrated against traceable standards.
Does Prism calibrate weighbridges?
Yes. Prism calibrates truck weighbridges up to 200,000 kg (200 tonnes) capacity using certified vehicle weights and calibrated reference masses.
Written by
Er. Parthiv Kinariwala
Managing Director · Prism Calibration Centre · NABL CC-2480 · Ahmedabad
Er. Parthiv Kinariwala founded Prism Calibration Centre in 2004 and has over 20 years of hands-on experience in calibration engineering, NABL accreditation, and industrial compliance. His team performs 10,000+ calibrations annually from the Vatva GIDC laboratory, serving 5000+ industries across Gujarat.
Prism Calibration Centre — Vatva GIDC, Ahmedabad
Prism Calibration Centre
F-101, Rudraksh Complex 2, Phase 3, GIDC Vatva, Near Jasoda Nagar Cross Road, Ahmedabad — 382445, Gujarat, India
Phone: +91 98245 26444
Email: info@prismcalibration.com
NABL: CC-2480 · ISO/IEC 17025:2017
Hours: Mon–Sat, 9:00 AM – 7:00 PM