B-2
Frequently Asked Questions
Series 2600 System SourceMeters User’s Manual
2600S-900-01 Rev. A / May 2006
How do I optimize performance?
Reference
Refer to “Operation considerations” in Section 4 and “Speed” in
Section 6 of the Series 2600 Reference Manual for detailed infor-
mation on performance factors that affect measurement speed and
accuracy.
There are three primary factors that affect measurement accuracy and speed:
• Warm-up – For rated measurement accuracy, allow the Series 2600 to
warm up for at least one hour before use.
• Speed setting – The Speed setting affects both speed and accuracy.
• Auto zero – Auto zero can be disabled to increase speed at the expense of
accuracy.
Setting speed
Press the
SPEED
key, then choose the setting based on your requirements:
• Choose the
FAST
setting for the fastest measurements, but measurement
accuracy will be reduced.
• For best accuracy, use the
HI ACCURACY
setting, but speed will be
reduced.
• To compromise between accuracy and speed, use the
MED
or
NORMAL
setting.
Disabling auto zero to increase speed
In certain measuring situations, disabling auto zero can increase measurement
speed, but accuracy will drift with time. To disable auto zero, select
CONFIG >
MEAS > AUTO-ZERO
, then set to
OFF
. To minimize drift with auto zero disabled,
use the
ONCE
selection just before measuring.
NOTE
Visit the Keithley Instruments website at
www.keithley.com for more information on Frequently
Asked Questions.
