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2-6
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Section Topics
2308-900-01 Rev. A / July 2008
Section 2: Basic Power Supply Operation
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Figure 2-4
Local Sense Connections (battery channel and charger channel)
RFI considerations
Operating the power supply in high Radio Frequency Interference (RFI) environments may result
in improper operation. For that reason, keep RFI to a minimum when operating the unit. Additional
shielding can be used to reduce RFI to an acceptable level.
Outputting voltage and current
Setting voltage protection value
Voltage protection value (VPT) is provided for the battery and charger channels. This function
monitors the pins (see
Figure 2-1
or
Figure 2-4
) with respect to the Model 2308’s
internal ground and will shut off the output voltage for either channel when the protection voltage
range (which equals the set voltage ± protection voltage) set by the user is exceeded. This voltage
is typically not the same voltage as at the device under test due to lead impedance and internal
sense resistor losses.
The VPT message will appear on the lower line of the display after the current reading indicator (A
or mA). The message will clear when the output it turned back ON, unless the condition causing a
the VPT message still exist. The VPT message takes precedence over the current limit messages.
See
Selecting current limit mode
for more information on the current limit messages. The VPT
message will not appear if the display mode is set to DUAL V AND I.
NOTE
Twist Source leads together for optimum performance.
NOTE
The voltage protection value (VPT) is channel-specific. The number after the
number sign (#) indicates the channel affected by editing.
Quick Disconnect
Connector
Source -
Source -
Sense -
Sense +
Twisted Pair
DUT
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