Semi-Micro Analytical Balance 0.01mg 31/120g ATOMFAIR®

The EB31-120G-01MG-R semi-micro analytical balance requires an ambient temperature of 18°C to 23°C and relative humidity of 20% to 80% RH for valid operation. A mandatory preheating period of 30 to 60 minutes is required after power-on before any zeroing, calibration, or sample addition can be performed.

• Temperature Constraint: Operating temperature must be maintained between 18°C and 23°C to ensure specified repeatability and linearity.
• Humidity Constraint: Relative humidity must be kept within 20% to 80% RH to prevent condensation and measurement drift.
• Preheating Requirement: A warm-up period of 30 to 60 minutes is mandatory after power-on to stabilize the internal sensor before any measurement operations.
• Automatic Recalibration Condition: The balance automatically triggers recalibration if the ambient temperature changes by more than 1.5°C or if two hours have elapsed since the last calibration.
• Power Supply Requirement: The balance requires a 220V AC / 50Hz input and 12V DC / 2A output power supply for operation.

The following steps outline the required initialization and calibration sequence to achieve stable and accurate measurements. Adherence to the preheating and environmental conditions is critical for maintaining the specified performance.

Required Equipment: External Calibration Weight (10 g), Power Supply (12V DC, 2A)

1. Power On and Preheat
   Connect the balance to the power supply and allow the instrument to warm up for 30 to 60 minutes.
2. Perform Zero Calibration
   Ensure the weighing pan is empty and press the tare or zero button to set the reference point.
3. Execute External Calibration
   Place the 10 g external calibration weight on the pan to verify and adjust the balance's accuracy.
4. Remove Calibration Weight
   Remove the 10 g calibration weight from the weighing pan after calibration is complete.
5. Add Sample and Record
   Add the sample to the pan and wait for the stabilization indicator to appear before recording the mass.

The EB31-120G-01MG-R semi-micro analytical balance delivers dual-range weighing up to 120 g with 0.01 mg readability and ≤2.5-second stabilization, but requires a 30–60-minute preheat and strict 18–23°C environmental control for reliable performance.

Positive

• Dual-range semi-micro weighing capability: Offers both a 31 g fine range and a 120 g full range, enabling precise measurement of trace samples up to larger masses without switching instruments.
• Autonomous recalibration against environmental drift: Automatically triggers recalibration when temperature fluctuates >1.5°C or after 2 hours, maintaining ±0.02 mg repeatability without manual intervention.

Trade-offs

• Mandatory 30–60 minute preheating period: Requires a warm-up of 30–60 minutes after power-on before achieving rated precision and stability, delaying immediate use.
• Narrow operating temperature range: Restricted to 18–23°C for optimal performance, demanding a stable, climate-controlled laboratory environment to avoid accuracy degradation.

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).