Model 526 provides a stable, uniform temperature source down to −115°C for calibrating thermocouples and platinum resistance thermometers at cryogenic temperatures. Designed for laboratory and industrial use, it offers reliable performance, portability, and straightforward operation for routine calibration work.

−115°C to 50°C ultra-low calibration
±0.03°C stability across the full range
Meets EURAMET cg-13 requirement
Integrates with Isotech reference thermometers and I-Cal Easy for automated calibration

Description

The Isotech Model 526 is a portable low temperature calibration source designed for both laboratory and field use. It provides controlled, stable temperature generation down to −115°C, supporting reliable calibration of sensors used in ultra-low freezers, pharmaceutical storage, and industrial processes.
Developed from Isotech’s long-standing expertise in temperature metrology, and building on the legacy of the Model 525, the Model 526 offers a practical solution for ultra-low temperature calibration.

Why Choose the Model 526?
Ultra-low temperature calibration presents specific challenges. Stability, uniformity, and control become increasingly difficult as temperatures fall below −80°C. The Model 526 has been designed to address these challenges while remaining practical for day-to-day use.

Key features:
• Temperature range from −115°C to 50°C
• Stability of ±0.03°C across the full operating range
• Free Piston Stirling Cooler (FPSC) technology for reliable deep cooling
• Controlled axial and radial temperature distribution
• 0.01°C resolution for precise adjustment and measurement
• Suitable for both laboratory and field calibration work

The Model 526 meets the requirements of EURAMET cg-13 for temperature block calibrators.

A range of accessories is available to support different calibration requirements and working environments:
• Carry case for transport and field use
• Alternative inserts including B and C types, and custom drilled to suit your probes
• I-Cal Easy software for automated calibration, data logging, and certificate generation

Specification

Parameter	Model
Temperature Range	−115°C to 50°C (at 23°C ambient)
PERFORMANCE
Stability	±0.03°C (over 30 minutes)
Display Accuracy	±0.5°C (full range)
Accuracy with External Reference	Up to ±0.05°C (dependent on reference)
Resolution	0.01°C
PHYSICAL
Immersion Depth	130 mm (pocket depth) + 50mm Insulator (180 mm effective)
Weight	12 kg (16kg with carry case)
TIMINGS
Stabilisation Time	~15 minutes
Cooling Time	23°C to −115°C ≈85 minutes
Heating Time	−115°C to 50°C ≈85 minutes
ELECTRICAL
Power Supply	100 to 115V or 200 to 230V, 50/60 Hz
Power Consumption	≈575 W
Interface	RS-232
ENVIRONMENT
Recommended Ambient	21°C to 25°C
Operating Environment	15°C to 60°C, ≤80% RH non-condensing

526 型低溫校正爐型錄

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