Average Readings - Keithley 2308 Quick Start Manual

is 16.67msec. In general, the fastest integration time (0.002 PLC) results in
increased reading noise. The slowest integration time (10 PLC) provides the best
common-mode and normal-mode rejection. In between settings are a compromise
between speed and noise. The NPLC RATE #2 item of the menu is also used to
set the reading rate for DVM measurements on the charger channel.
NPLC RATE is not used to set the integration rate for pulse
NOTE
current and long integration measurements. These
measurements are covered in the paragraphs titled
current mode

Average readings

The average reading count (1 to 10) specifies the number of measurement
conversions to average for each reading. For example, with a reading count of 5,
each displayed reading will be the average of five measurement conversions. The
AVER READINGS #2 menu items are also used to set the average reading count
for DVM measurements on the charger channel.
AVER READINGS is not used to set the average reading count
NOTE
for pulse current and long integration measurements. Refer to
applicable sections of this guide for information on setting the
average reading count for pulse current and long integration
measurements.
Programming examples: outputting and reading back V and I
The following command sequences demonstrate how to output voltage and
current, and read back (measure) the actual voltage and current:
Battery channel (#1)
VOLT 5
SENS:CURR:RANG:AUTO ON
CURR 750e-3
CURR:TYPE TRIP
SENS:FUNC 'VOLT'
SENS:NPLC 2
SENS:AVER 5
OUTP ON
READ?
SENS:FUNC 'CURR'
and Long integration mode.
' Set output voltage to 5 V.
' Enable auto range for current.
' Set current limit to 750 mA.
' Select Trip mode for current limit.
' Select the voltage measurement function.
' Set integration rate to 2 PLC.
' Set average reading count to 5.
' Turn on the power supply output.
' Trigger 5 voltage measurement conversions
and return the average of those 5
conversions. The average reading is
displayed on the front panel.
' Select current measurement function.
Front-panel operation 9
Pulse