Specification
Accuracy specifications apply for 18°C – 28ºC. Setting accuracies apply with slew rate control at
mid position and at 50W load power; regulation specifies variation at other powers.
INPUT
Maximum Input Ratings
Current: 80 Amps max. at rear panel terminals.
30 Amps max. at front panel terminals
Voltage: 80 Volts max. while conducting current.
Surge suppressors start to conduct at 120V (nominal),
Max. non-repetitive surge energy: 80 Joules.
Power: 320 Watts max. up to 28ºC, derating to 300 watts at 40ºC.
Reverse Polarity: Diode will conduct; 80 Amps max.
Off State Leakage:
<10 mA, plus 680kΩ sensing resistance.
Minimum Operating Voltage: 2V at 80A; typically 1V @ 40A, 0·5V @ 10A.
Isolation Voltage: ± 300Vdc max, either load input to chassis ground.
Input Terminals
Rear Panel Input: Safety terminals accepting 6mm diameter wire, 6mm plugs or 8mm
spades at 80 Amps max or 4mm plugs at 30 Amps max.
Front Panel Input: Safety terminals accepting 4mm diameter wire, 4mm plugs or 6·5mm
spades. 30 Amps max.
External Voltage Sense
Connection: Terminal block on rear panel. Slide switch to select between Internal
and External Voltage Sense.
Input Impedance:
680kΩ each input to load negative.
Max. Sense Voltage Drop: 6V.
OPERATING MODES
Constant Current Mode (CI)
Current Ranges: 0 to 8 A (1 mA resolution) and 0 to 80 A (10 mA resolution).
Setting Accuracy: ± (0·2% + 30 mA).
Regulation: < 30 mA for 90% load power change (V > 2 Volts).
Temperature Coefficient: < (0·02% + 5 mA) per ºC.
Slew Rate Ranges: 8 A range: <2·5 Amp per s to >250 Amp per ms.
80 A range: <25 Amp per s to >2500 Amp per ms.
Minimum transition time: 32 µs.
Constant Resistance Mode (CR)
Resistance Ranges:
0·04 to 10 Ω (0·01 Ω resolution); 2 to 400 Ω (0·1 Ω resolution).
Setting Accuracy: ± (0·5% + 2 digits + 30 mA).
Regulation: < 2% for 90% load power change (V > 2 Volts, using remote sense).
Temperature Coefficient: < (0·04% + 5 mA ) per ºC.
Slew Rate Ranges:
10 Ω range: <1 Ω per s to 100 Ω per ms.
400 Ω range: <400 Ω per s to 4000 Ω per ms.
Minimum transition time: 100 µs.
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