Tektronix Keithley 2651A Reference Manual page 815

Section 9: Frequently asked questions
How do I optimize performance?
The primary factors that affect measurement accuracy and speed are:
•
Warm-up: For rated measurement accuracy, allow the Model 2651A to warm up for at least two
hours before use.
•
Speed setting: The speed setting affects both speed and accuracy. For more information, see
Speed.
•
Autozero: Autozero can be disabled to increase speed at the expense of accuracy (for more
information, see
Disabling autozero to increase speed
Disabling autozero (setting it to OFF) can increase measurement speed. If autozero is disabled,
accuracy drifts with time and temperature.
Turning autozero OFF disables the autozero function and possibly increases measurement speed.
To minimize drift, setting autozero to ONCE performs an autozero operation one time (when it is
selected), and then disables the autozero function. For a more detailed discussion of autozero, see
Autozero (on page 2-25).
To configure autozero from the front panel:
1. Press the CONFIG key, and then select MEAS from the menu.
2. Select AUTO-ZERO, and then press the ENTER key or the navigation wheel.
3. Select the mode (OFF, ONCE, or AUTO), and then press the ENTER key or the navigation
wheel.
4. Press the EXIT (LOCAL) key to the normal display.
Refer to Remote command autozero
remote interface.
How do I upgrade the firmware?
For information on upgrading the firmware, see
9-2
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Disabling autozero to increase speed
(on page 2-26) for details about configuring autozero from a
(on page 9-2)).
Upgrading the firmware (on page 11-4).
2651A-901-01 Rev. C October 2021