2-16
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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
Reading back V and I
V and I display modes (Single or Dual)
Measured output voltages and currents are displayed with either SINGLE or DUAL V AND I
display modes. Dual displays both channels simultaneously; single only shows the readings for
the active channel.
These display modes are selected as follows:
1. Press
the
DISPLAY
key.
2. Press
the
▲
or
▼
keys to scroll to
SINGLE V AND I
or
DUAL V AND I
.
3. For
SINGLE V AND I
, press the
or
keys to select Channel
#1
or
#2
.
4. Press
ENTER
to select and return to display of readings.
Measurement configuration
CURRENT RANGE #1/#2, INTEGRATION RATE #1/#2, and the AVER READINGS
#1/#2 can be checked or changed from the menu (which is accessed by pressing the
MENU
key).
The #1 (battery channel active) or #2 (charger channel active) will appear on the top line of the
display (use or keys to toggle the active channel).
Current range
Current range is linked with current limit. Therefore, as a general rule, the user selects the current
range before setting the current limit. The current range can be changed at any time, but selecting
the lower range may change the current limit setting (see
Outputting voltage and current
for details
on current range and current limit).
NPLC rate
The integration (reading) rate of the instrument is specified as a parameter based on the number
of power-line cycles (NPLC), where 1 PLC for 60Hz line frequency is 16.67msec (1/60). In general,
the fastest integration time (
0.002
PLC) results in increased reading noise. The slowest integration
NOTE
To display measured readings if the instrument is in the settings mode, press the
SET
key until the blinking stops (the measured readings can then be displayed).
To determine if the instrument is in the settings mode, check for a blinking cursor
in a digit of the voltage or current field (if present, the instrument is in the setting
mode).
NOTE
Voltage readings are located on the top line of the display, and current readings
are located on the bottom line when in single display mode. For dual display
mode the top line has the voltage and current readings for battery channel, and
the bottom line has the readings for charger channel.
For details about display modes, see
Display modes
.
NOTE
See
Table 1-3
for an illustration of the menu structure. Rules to navigate the
menu follow the table.
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