Bio-Rad CHEF-DR® III Variable Angle System - Manual (Page 5)

tials are readjusted immediately to maintain uniform fields, thus insuring high resolution. In
PACE, the voltage potential of each of the 24 electrodes is regulated independently. Unlike
the CHEF-DR II system, which has a fixed reorientation (field) angle of 120° due the hexag-
onal geometry of the electrode array, the CHEF-DR III system can generate field angles from
90–120°. In addition, the CHEF-DR III system permits up to three consecutively executing
blocks of run conditions with battery backed-up RAM and automatic restart after power
interruption.
1.3 Specifications
These specifications pertain to the complete CHEF-DR III system. A system including the
Cooling Module is also available.
CHEF-DR III Specifications
Power Module:
Dimensions 43 (depth) x 48 (width) x 17.5 (height) cm
Construction Aluminum chassis
Weight 10 kg
Power supply 350 V maximum, to allow maximum gradient of
9 V/cm, continuously adjustable; built in
Electrical
Maximum amps 0.5 amperes
Allowable voltage gradients 0.6–9 V/cm, in 0.1 V/cm increments
Battery back-up All parameters in memory
Electrode potentials Dynamically regulated (feedback adjustment)
+/- 0.5%
Data entry Keyboard
Functional
Switching range 0.1 sec to 65K sec
Switch angle variable 90–120 degrees (all electronic switching) in 1°
increments
Maximum program blocks 3, with automatic execution
Maximum run time 999 hours per block
Input voltage range 100–120 VAC/50–60 Hz/4 amps
220–240 VAC/50–60 Hz/2 amps
Fuses 0.5 amp Fast Blow for high voltage output
3.15 amp Slow-Blow (100/120 V) or
1.60 amp Slow-Blow (220/240 V)
Environmental
Operating 50 °F (10 °C) to 90 °F (32 °C) temperature
30–80% humidity
Storage 32 °F (0 °C) to 140 °F (60 °C) temperature
10-90% humidity
Electrophoresis cell:
Dimensions 11.4 x 44.2 x 50.3 cm, horizontal format
Construction Cover: Vacuum formed polycarbonate
Base: Injection molded polycarbonate
Lid Safety interlocked
Weight 10.2 kg
Electrodes 24, platinum (0.02 inch diameter)
Temperature monitoring Via precision temperature probe mounted in base
of cell
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