500 Ma Range Readback Accuracy - Keithley 2308 User Manual

Section 12: Performance Verification
6. After changing connections to OUTPUT #2, repeat steps 1 through 5 for Channel #2 (use
the

500 mA range readback accuracy

NOTE
To verify that current readback accuracy is within specified limits:
With the power supply's output off, connect the digital multimeter and characterized 30 Ω
1.
resistor to the OUTPUT #1 terminals, as shown in
polarity and connections (30 Ω resistor between SOURCE + and DMM INPUT HI; SOURCE
- to DMM INPUT LO).
12-10
or keys to toggle between Channel #1 and Channel #2).
Table 12-5
5 A range current readback accuracy limits
Nominal output
Voltage
1 V
2 V
3 V
4 V
4.5 V
*Check the complete Model 2308 Specifications at
updated current readback accuracy limits before verification.
**As measured by digital multimeter and 1 Ω resistance value.
When verifying the battery channel (#1), make sure you connect the source +
and source - to the same pair of pins (either both in or both out) on the
connector. Do not mix them because the internal resistance present on the
inner pins will cause incorrect verification data to be returned.
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Model 2308 Portable Device Battery/Charger Simulator User's Manual
Model 2308 Current readback limits
**
output current (2 Years, 18°C-28°C)
1.000 A 0.9978 to 1.0022 A
2.000 A 1.9958 to 2.0042 A
3.000 A 2.9938 to 3.0062 A
4.000 A 3.9918 to 4.0082 A
4.500 A 4.4908 to 4.5092 A
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Figure
*
for
12-3. Be sure to observe proper
2308-900-01 Rev. A / July 2008