Getting Started 1-5
A simplified diagram of the power supply is shown in Figure 1-2. Note that it can read back
the output voltage (V
meter
) and current (I
meter
). Display resolution for voltage readback is 1mV.
Current Readback Ranges:
• Models 2303 and 2303B – Two ranges for current readback: 5A and 5mA. On the 5A
range, display resolution is 100
µ
A, and on the 5mA range, resolution is 0.1
µ
A.
• Model 2303-PJ – Two ranges for current readback: 5A and 500mA. On the 5A range,
display resolution is 100
µ
A, and on the 500mA range, resolution is 0.01mA (10
µ
A).
The power supply also has a digital voltmeter (DVM) that is independent of the power supply
circuit. The DVM can measure up to +20V (1mV resolution).
When used with a pulsed load, the power supply can read back peak current, idle current, and
average current. See Section 3 for details. A long integration (up to 60 seconds) function is pro-
vided to measure average current of a low frequency pulse (long period) or a series of pulses.
See Section 4 for details.
Figure 1-2
Simplified power supply diagram
Source
+
_
V-Source
with I-Limit
I meter
V meter
+
_
Digital
Voltmeter
DVM
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