Temperature control

Temperature control


Precise temperature control at a low energy requirement.

 

Description

One of the most important criteria for a top quality incubator shaker is precise temperature control with a low energy requirement. On top of that, to ensure reproducible cultivating results, even temperature distribution across the entire shaking tray is crucial.

Electronic, fully digital PID control incorporating a microprocessor, accurately maintains the desired temperature in Kuhner machines. The minimal energy consumption of the cooling system is regulated by an intelligent controller. True temperature distribution is achieved by using high grade foamed insulation. This complex method also ensures optimal air circulation inside the chamber.

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Technical data

The direct drive uses a single eccentric bearing fitted to the top of the drive so there is no possibility of internal stress between bearings. The shaking diameter can be changed at any time by altering the position of the eccentric bearing. Three shaking diameters 12.5, 25 and 50 mm are available as standard, with other settings possible on request.

 

Temperature, minimum
10oC above ambient
Temperature with refrigeration
15oC below ambient, min. +5oC
Temperature, maximum
80oC
Temperature accuracy
± 0.3oC (37oC), distributed across the entire tray / XC-machines:  ± 0.25oC (37oC)
Temperature indication
±0.1oC, digital
Temperature control
PID, digital
Temperature sensor

Pt-100, class "A" (DIN IEC 751)

Tolerance = 0.15oC + 0.002 x ltl

Examples:

t: 37oC, Tolerance = ± 0.22oC

t: 20oC, Tolerance = ± 0.19oC

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Calibration of temperature sensor

Calibration is quite simple and is carried out using
  • an interface and a PC with the ISIS software installed
  • a temperature measuring device with sensor and certificate e.g. “TCAL 44” available from Kuhner

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