Cooling dry block heater Medusa POTTS 511

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Presentation
The Medusa POTTS 511 is a dry-block calibrator designed for calibration of probes requiring a large immersion depth. It provides temperature uniformity suitable for use as a Fixed-Point system for ITS-90 verifications.

Main uses

• High-capacity block with large immersion depth
• Fixed-Point and comparison calibrations
• Calibration of very long thermometers

Features and description
The Medusa POTTS 511 operates over a temperature range from 50°C to 700°C and features three independent temperature control zones. It is a complete standalone calibration system suitable for conventional thermometers and temperature sensors of any length and shape: optical pyrometers, surface sensors, thermistors, thermocouples and platinum resistance thermometers. The furnace can also be used to maintain reference standards by regularly verifying them at the ITS-90 Fixed Points for Indium, Tin, Zinc and Aluminum. The calibration volume is 45 mm diameter with a usable depth of 285 mm.

Supplied as standard

• Indicator
• Reference probe Pt100 935-14-95H/DB
• Timer
• Cal Notepad software
• Serial communication cable
• User manual
• Traceability certificate

Sleeves, cells and available accessories

• Metal sleeves: standard 6-well sleeve Ø 8 mm x 250 mm depth; unperforated sleeve; custom sleeve; adjustable equalization block 6-well Ø 8 mm x 157 mm depth
• Blackbody source/target (option)
• Sleeve and reference probe for surface sensor calibration
• ITS-90 Fixed-Point cells (mini cells) available for Indium (156.5985°C), Tin (231.9280°C), Zinc (419.527°C) and Aluminum (660.323°C) in metal or quartz capsule versions
• Other accessories: replacement blackbody reference probe, replacement reference probe for surface sensor calibration, sleeve for surface sensor calibration, Inconel supports for cells, transport case

Remarks
Specify supply voltage when ordering.

Characteristics / technical specifications

• Temperature range: 50°C to +700°C
• Absolute stability over 30 min: Calibration furnace ±0.03°C; Blackbody source ±0.1°C; Surface sensors ±0.5°C; ITS-90 Fixed-Point cells ±0.001°C
• Cool-down time: 550°C to 30°C: 5 h
• Heat-up time: 30°C to 550°C: 90 min
• Uncertainties: see graph (uncertainties depend on configuration and temperature)
• Calibration volume: Ø 45 mm x 285 mm depth
• Standard insert: 6 wells Ø 8 mm, depth 250 mm
• Dimensions (without packaging): 430 x 310 x 300 mm
• Mass (without packaging): 25 kg
• Display: Resolution 0.01 to 99.99 and 0.1 to 100.0 / 650.0; Units: °C, °F, K
• Power supply: 108 / 130 V, 50/60 Hz or 208 / 240 V, 50/60 Hz — Power: 1800 Watts
• Communication interfaces: RS 232