How to Maintain and Calibrate Your Lab Scale for Long-Term Accuracy

Introduction

In the lab, precision isn’t optional — it’s essential.

Even a top-quality analytical balance or precision lab scale can lose accuracy if not properly maintained and calibrated. Whether you're running a pharmaceutical lab in Ahmedabad, a chemical plant in Baroda, or a university lab in Gandhinagar, your weighing results must be consistent, traceable, and audit-ready.

At Shree Shree Weighing Solutions, we not only supply NABL-compliant laboratory scales across Gujarat — we also provide expert calibration and maintenance support.

Here’s your essential guide to keeping your lab scale in peak condition.

⚖️ Why Maintenance Matters

Over time, exposure to:

• Dust

• Airflow

• Chemical vapors

• Humidity

• Electrical fluctuations

…can cause your lab scale to:

• Drift from calibration

• Become unstable

• Display inaccurate readings

• Fail during audits or validations

🔧 Key Maintenance Tips for Lab Scales

1. Keep the Balance on a Stable Surface
   Use an anti-vibration table or granite slab. Avoid wood or metal surfaces that move or shake.

2. Use the Draft Shield Correctly
   Always close the glass draft shield before taking a reading to avoid air disturbance.

3. Handle Weights with Tweezers or Gloves
   Oils or fingerprints on test weights can cause minor deviations.

4. Clean Gently and Frequently
   Use a dry, soft cloth or a brush. Never use water or harsh chemicals near the pan or display.

5. Avoid Overloading
   Even once. Repeated overloading permanently damages the internal loadcell.

🧪 Calibration: What You Need to Know

External Calibration:
Done using certified weights. Ideal for labs where balances are moved often.

Internal Calibration:
Auto-calibration using built-in motor weights. Great for high-precision, high-frequency usage.

🛠️ When Should You Calibrate?

• Daily (for analytical balances with 0.0001g sensitivity)

• Weekly (for general-purpose lab scales)

• After relocation

• After power outages or voltage fluctuations

• Before any major test or audit

📋 NABL-Traceable Calibration with Shree Shree

We offer:

• Calibration by certified experts

• NABL-traceable certificates

• Annual Maintenance Contracts (AMC)

• On-site stamping from Legal Metrology (on request)