Chamber cover removed exposing rotating
fixture. Test heads may be fixtured from 2
to 48 contacts.  Up to 254 parts may be
tested in one chamber (depending upon
components tested).  Figures 1A and 1B show the temperature transition of the 4220 chamber from one end of the temperature
range to the other.  Figure 1A - Temperature transition -60° to + 150°
(X-axis in minutes).  Figure 1B - Temperature transition + 150°
to - 60° (X-axis in minutes).  SAUNDERS & ASSOCIATES, INC.  6300095-03

 S&A              4220 CHAMBER
FOR PARAMETRIC TESTING  •  Stability: +/-  0.1° C including effects  of line voltage, ambient  temperature and aging  •  Uniformity:  +/-  0.2° C component area  •  Temperature range: -55° C to + 150° C (+200°C  max. temperature optional)  •  Rate Change:  See figures 1A and 1B  •  Energy Use: 150 Watts to maintain 150° C  3.5 lbs./hr CO2  to maintain -55° C  •  Voltage:   190 - 250 VAC, 50 -  60 Hz 4.6 KVA Max. or  95 -  125 VAC, 50 -  60 Hz 2.3 KVA Max.  Specifications are valid for the chamber equipped with a four inch high cover, a
component support wheel and a dual row crystal test wheel installed  •  Coolant: LN2 or CO2  •  Programmable keyboard: Programmable keyboard allows temperature to be    set, stepped (at user-defined increments), slewed (at user-defined rates) and
cycled  •  Remote Operation: Chambers may be remotely controlled via IEEE bus or  RS232C port  •  Flexible Tooling: Can be easily customized for testing needs