High Accuracy Calibration Standards

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Brief Description

High Accuracy Calibration Standards are precision instruments used as primary or secondary reference devices in laboratories and field calibration routines to verify and adjust the accuracy of standard industrial sensors.

In-depth Overview

These devices, often including Digital Pressure Gauges with high-resolution displays or Precision Test Gauges (analog) with mirror bands, offer accuracy classes significantly better than those of the field instruments they are measuring. Digital calibration standards frequently include advanced features like datalogging, temperature compensation, and HART communication. Maintaining traceable standards is critical for regulatory compliance and quality assurance (e.g., ISO 9001). We supply instruments calibrated in accordance with national and international metrology bodies.

Specification

Parameter	Details
Instrument Type	Digital Calibrators, Precision Test Gauges, Deadweight Testers
Accuracy Class	±0.05% FS to ±0.25% FS (typically Class A or ASME Grade 3A)
Resolution	4 to 6 significant digits (Digital)
Connection	1/4′′ or 1/2′′ NPT/BSPP (High Quality Seal)
Features	Peak Hold, Tare, Data Logging, Min/Max
Calibration Range	Vacuum up to 2,000 bar (full range of testing)
Certification	NIST Traceable Calibration Certificate Included
Material	Stainless Steel 316 (for pressure media compatibility)

Applications

In-House Calibration Labs: Used as the primary reference for pressure and temperature instrument check-out and repair.
Field Service Teams: Portable digital calibrators for quick and accurate on-site verification of process transmitters.
Quality Control: QC checks for incoming or outgoing pressure and temperature gauges.
Regulatory Compliance: Essential for maintaining ISO 9001 certification and other quality standards.

Key Advantages

Verifiable Accuracy: Provides the required accuracy to legally and safely verify lower-grade process instruments.
Traceability: Supplied with official certificates ensuring the standard is traceable back to national standards.
Cost Reduction: In-house calibration saves the expense and downtime of sending all instruments to third-party labs.
User-Friendly: Digital calibrators simplify calibration routines with built-in functions for error calculation.

Payment and Shipping

We accept major international payments, including T/T and L/C. Calibration standards are high-value, low-volume items; lead times are typically 4−6 weeks as each unit requires individual, certified calibration. They are shipped in lockable, foam-lined carrying cases to protect the high-precision sensor from shock and temperature fluctuations during transit, accompanied by all calibration paperwork.

Frequently Asked Questions

Q: How often must a calibration standard be re-calibrated?
A: Typically, high-accuracy standards require re-calibration annually (every 12 months). However, the frequency should be adjusted based on the instrument's usage frequency, handling, and the quality system requirements of the user.

Q: Why is a precision test gauge's dial larger than a standard gauge?
A: Precision test gauges (often 150mm or 250mm) use a larger dial to increase the distance between scale markings. This greater scale length allows for finer resolution and easier reading of small pressure changes, corresponding to their high accuracy class.

Q: What is a deadweight tester?
A: A deadweight tester is the most accurate primary standard for pressure measurement. It uses precisely measured weights placed on a piston to generate a known, traceable pressure based on the physical formula Pressure=Force/Area.

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High Accuracy Calibration Standards Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.