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Julabo

LH50 Temperature Control System


JULABOLH50 Temperature Control System

Presto - High Dynamic Temperature System

Instruments of the PRESTO series are the ideal solution for highly precise, external temperature applications. They offer rapid heating and cooling, wide working temperature ranges without changing fluids as well as highest performance with a small footprint. The self-optimizing controller (ICC - Intelligent Cascade Control) provides excellent temperature stability and optimized control. The classic PID control parameters are available at the touch of a button for modification at any time. All models have an interactive 4-line LCD display as well as a bright VFD-Info-Display. All this together with the splash-proof keypad and the high temperature cut-out (safety value) ensure safe and convenient operation. Reciprocal sensor monitoring, self-test after switch-on, pump motor and compressor overload protection as well as permanent performance supervision of sensors guarantee reliable performance and provide high safety for your samples. Analog connections, digital interfaces and the optional Profibus allow future-oriented automation technology. The high standard of heating, cooling and pump capacities in combination with outstanding ICC temperature control help to produce reliable and quick results.


Advantages

  • For highly precise, external temperature applications
  • Rapid heating and cooling
  • For isotherm realization of chemical processes
  • Wide working temperature ranges without changing fluids
  • Highest performance with small footprint
  • Bright VFD-Info-Display and interactive LCD display
  • RS232 interface for on-line communication (LIMS capability)
  • RS485 interface for bus data exchange
  • Analog setpoint/programmer input (0 to 20 mA / 0 to 10 V)
  • Temperature recorder output (0 to 20 mA / 0 to 10 V)
  • Stand-by input for external emergency switch-off
  • Integrated programmer stores up to 6 profiles (60 sections each)
  • Upper and lower temperature warning functions with interval tone
  • High temperature cut-out (safety value) adjustable on the front
  • Removable control module
  • Filling system accessible from the front
  • Removable venting grid for simplified removal of dust


Technical Specifications

Working temperature range -50 ... 250 C   
Temperature control PID+ICC 
Temperature stability external 0.01 C
Display LCD+VFD    
Display resolution 0.01 / 0.01 C
Integrated programmer available 
Heater capacity 6000 W   
Cooling capacity
200   20   -20   -40           C
5500   7000   2800   900           W
Refrigerant R404A 
Pump capacity Pressure:   11.6...31.9 psi   
Flow rate: 35 lpm
Digital interfaces RS232, RS485, optional Profibus 
External Pt100 sensor connection available
Filling volume 13.5 Liters
Filling volume expansion vessel 4.9 Liters
Dimensions (W x L x H) 15.7 x 21.7 x 50 inches
Weight 375 lbs
Ambient temperature 5 ... 40 C
Classification according to DIN 12876-1

Miscellaneous

External temperature stability varies with the working temperature range between 0.01 to 0.05 C
Integrated Profibus (option) allows communication with up to 31 instruments via PC
Water cooled
IP31 (IEC 60529)
Cooling capacity measured at pump stage 1 = 24 l/min ; 0.8 bar


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