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Feature of the Month: June 2006

The ACS Challenge CH250

Available for immediate delivery

The Challenge CH250

Capacity :     224 litres

Internal Dimensions :     600 x 535 x 700mm (WxDxH)

External Dimensions :    

850 x 1460 x 1516mm (WxDxH)) - for height with castors add 47mm

Temperature Range :    

-40°C to +180°C

Fluctuation :    

±0.25șC…±0.3șC

Temperature Variation Rate (according to IEC60068-3-5) :    

5șC/min from -40șC to +180șC
3.5șC/min from +180șC to -40șC
(average rates with no load and ambient temperature of +20șC to +22șC)

Relative Humidity Range :    

From 10% to 98% in the range +5șC to +95șC

Dewpoint Range :    

+2șC to +94șC for continuous tests, -20șC to +2șC for limited period based on starting conditions and foreseen testing time.

Relative Humidity Stability :    

±1%…±3% and in all cases not less than ±0.25șC within the psychrometric table

Control :    

By ”PLC and colour “KeyKratos” touchscreen placed on the door (24 touch areas, 1024 dynamic tests, IP65 frontal panel protection grade). It allows programming of the T and RH cycles and control of all chamber functions and alarms.

Dissapation at 025șC :    

400 W

Electrical Power :    

7.7kW (4.8kW average)

Voltage :    

400V +6%/-10%/50Hz/3ph + N + G

Noise :    

59 db(A) at 1m from the front of the chamber in a non-reverberating room

Weight :    

490 kg

Included Accessories :    

  • 450 x 450mm Multipane inspection window
  • Castors assembly
  • Self-feeding system (mains water through chamber embedded softener)
  • 1 lateral porthole (dia. 80mm)
  • 1 Internal shelf
  • Internal lamp
  • Air condenser
  • RS232 interface (or RS485 on request)
  • Digital undertemperature/overtemperature switch with independent probe
  • Connection to UPS
  • False ceiling to prevent water dripping on the test object


  • The software source code and the relative documentation are not included. For futher information please contact Sharon


    (click here to view all previous features)
    Unit 7 Millbrook Business Park Hoe Lane Nazeing Essex EN9 2RJ
    Tel 0870 870 6615
    International +44(0)1992 899 440
    Fax 0870 870 6616
    International +44(0) 1992 899 441
    E-mail: enquiries@ets.co.uk