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Output response time: Beginning at the time the power supply has finished processing a VSET command (change
output voltage), the maximum time for the output voltage to settle to within a settling band about the final value from any
specified operating point. This value must be added to the command processing time to obtain total programming time (see
Figure 1-3). Time constant is the maximum time required for the voltage to reach 63% of its final value.
Figure 1-3. Output Response Characteristics
Temperature coefficient: Maximum change in the regulated output parameter per °C change in ambient temperature
after a 30 minute warmup. Expressed as a percentage plus a constant per degrees C. (Plus a constant for readback
temperature coefficient).
Long Term Drift: Maximum change of regulated output voltage or current during an 8-hour period following a 30 minute
warmup, with all influence and control quantities maintained constant. Expressed as a percentage of the setting plus a
constant.
Short Term Drift: Maximum change of regulated output voltage or current within 30 minutes after a line and/or load
change. Expressed as a percentage of the setting plus a constant.
Output Noise (PARD): PARD replaces the former term ripple and noise. PARD is the periodic and random deviation of
dc output voltage or current from its average value, over a specified bandwidth and with all influence and control quantities
maintained constant.
Programming resolution: Average programming step size.
Current Sinking (- Current): Each output can sink as well as source current. The sinking capability is not programmable
and depends upon the output voltage. The current sinking capability is described in greater detail in
Chapter 4.
Table 1-2. Specifications
PERFORMANCE SPECIFICATIONS: (0 to 55 °C unless otherwise specified)
DC Output Ranges: All outputs will accept voltage programming commands 1% higher than those listed and
current programming commands 3% higher than those listed.
Output Power 25 Watt Output 50 Watt Output
Output Range Lo Range Hi Range Lo Range Hi Range
Output Volts 0-7 V 0-50 V 0-16 V 0-50 V
Output Amps 0-15 mA 0-500 mA 0-200 mA 0-2 A
Load Effect (Regulation):
Voltage 0.5 mV 0.5 mV 0.5 mV 0.5 mV
+ Current 0.005 mA 0.005 mA 0.01 mA 0.015 mA