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2308-900-01 Rev. A / July 2008
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Section Topics
13-13
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section 13: Calibration
12. Send the following command to output 45 mA for 50 mA full-scale calibration:
:CAL:PROT:STEP
8
13. Send the following command to output 45 mA for 50 mA full-scale calibration:
:CAL:PROT:STEP
9
<Calculated_Current>
For example, if the current value is 45 mA, the command would be:
:CAL:PROT:STEP9 45e-3
14. Connect the characterized 3 k
Ω
resistor in place of the 4
Ω
resistor (
Figure 13-3
).
15. Make sure the DMM DC volts function and auto range are still selected.
16. Send the following command:
:CAL:PROT:STEP
10
17. Note and record the DMM voltage reading, then calculate the current from the voltage
reading and actual resistance value. Send that current value as the parameter for the
following command:
:CAL:PROT:STEP
11
<Calculated_Current>
For example, if the current value is 4.5 mA, the command would be
:CAL:PROT:STEP10 4.5e-3
Step 3: Perform charger channel calibration steps
1. Connect the OUTPUT #2 SOURCE, SENSE, and DVM IN terminals to the digital
multimeter. Use the same connections shown in
Figure 13-4
.
2. Send the following command to output 14 V:
:
CAL:PROT:STEP
12
14
3. Note and record the DMM reading, then send that reading as the parameter for the following
command:
:CAL:PROT:STEP
13
<DMM_Reading>
For example, if the DMM reading is 14.012 V, the command would be:
:CAL:PROT:STEP
13
14.012
4. Note and record a new DMM reading, then send that reading as the parameter for the
following command:
:CAL:PROT:STEP
14
<DMM_Reading>
5. Send the following command for DVM full-scale calibration:
:CAL:PROT:STEP
15
6. Connect the Model 2308 OUTPUT #2 SOURCE terminals to the DMM volts input and
characterized 4
Ω
resistor. Use the connections shown in
Figure 13-2
, but make your
connections to the OUTPUT #2 terminals instead. Be sure to observe proper polarity
( to INPUT HI; SOURCE - to INPUT LO).
7. Make sure the digital multimeter DC volts function and auto-ranging are still selected.
8. Send the following command to output 1.9 A for 5 A full-scale calibration:
:CAL:PROT:STEP
16
1.9
9. Note and record the DMM voltage reading, then calculate the current from that reading and
4
Ω
resistor value. Send the following command using that calculated current as the
parameter:
:CAL:PROT:STEP
17
<Calculated_Current>
For example, if the current value is 1.894 A, the command would appear as follows:
:CAL:PROT:STEP
17
1.894
10. Note and record a new DMM voltage reading, then again calculate the current from the
voltage and resistance. Send the calculated current value as the parameter for the following
command:
:CAL:PROT:STEP
18
<Calculated_Current>
Summary of Contents for 2308
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