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FB08

FB08C

OTHER TECHNE TEMPERATURE CALIBRATION SOLUTIONS

Dry-Block Calibrators          Liquid Baths          Thermometer Systems

Description and Operation

The FB08 is a rectangular bench standing unit. The controls for temperature and fluidizing air flow are mounted on a recessed panel on the front of the unit, together with on-off switches for the power supply and the dust extractor and indicators for various functions. Insulated and vented the outer case is safe to touch even at the maximum operating temperature. The inner container is filled from the top with alumina. When Fluidized, this medium is heated by four immersion heaters close to the container wall with the control thermocouple between the heaters. The internal components are protected by an air cutout switch that disables heat in the event the fluidizing air is lost.

Clean, dry air from an external source passes through two filters and regulators, to reduce the pressure for the cyclone extraction system and fluidization. Fluidizing air passes through a flow meter and then to the plenum chamber from which it is distributed evenly around the inner container. Dust extraction is by means of ambient air drawn from around the probe holder/plate and then through a cyclone to the exhaust filter. Alumina dust removed from the opening of the bath is deposited into the front mounted collection jar where it can be removed and dumped back into the bath.

In operation, set the fluidizing air by means of a combined control valve and flow meter. (Note: air adjustment is automatic with the FB08C) Fluidizing air requirements are inverse of the bath temperature. i.e.- lower bath temperatures require more air for proper fluidization. The bath temperature is set by means of a front panel mounted PID controller. Sensors for calibration should be suspended as close as possible to the center of the bath. When calibrating sensors the probe holder is recommended as it is custom built with the dimensions of the sensors you will be calibrating.

Dead-Bed Operation

A major of feature of the FB08 series is calibration using the Dead-bed method. During Dead-bed the power is shut off and 30 seconds later the fluidizing and extraction air are turned off. This causes the alumina to collapse around your work and provides a dense, high thermal insulation environment. For a period of three to ten minutes thermal equilibrium occurs and stability of better then ±0.01°C is observed.

Models to choose from:

The FB08 is offered in three different models. The standard FB08 operates from +50 to 700°C, in addition to the standard unit the FB08C offers automatic fluidizing air control and is capable of remote PC operation. When connected to your liquid nitrogen supply the FB08LT operates between -100 and +200°C. The single probe plate and ring are included with the baths. You will also receive one 35lb. charge of alumina to get started.

Specifications

Accessories

Image	Description	Catalog Number
	Basket probe/plate	6037759
	Probe carrier/holder (specify probe diameters)	7031993
	1 (35lb.) charge of alumina	7030794
	Air pressure regulator/filter	6035915