№ files_lp_4_process_3_131045
Procedure for calibrating weights through single substitution by comparing a standard and an unknown weight using mechanical or electronic balances under controlled environmental and metrological conditions.
Year: 2026
Region / City: Laboratory unspecified
Subject: Metrology, Calibration
Document Type: Standard Operating Procedure (SOP)
Institution / Organization: Not specified, applicable in metrology laboratories
Author: Not specified
Intended Audience: Laboratory personnel trained in precision weighing
Effective Period: Until updated or replaced
Approval Date: Not specified
Required Equipment: Single-pan mechanical balance, full electronic balance, combination balance, calibrated working standards, sensitivity weights, barometer, thermometer, hygrometer
Environmental Conditions: Temperature 18–27°C depending on echelon, Relative Humidity 40–60%
Traceability: SI units via National Metrology Institutes (e.g., NIST)
Prerequisites: Valid calibration certificates, metrological traceability, trained operators, laboratory environmental stability
Precision Classes: OIML F1 to M3, ASTM 3 to 7
Price: 8 / 10 USD
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