2. Press the
AUTO
key as many times as needed to select the
AUTO range function. When AUTO is selected, the 2657A
automatically selects the best range for the measured value.
You will briefly see the display shown below, and then the
main display screen reappears.
AUTO
SrcA:+100.000V LimA:10.00000mA
AUTO
Step 4: Turn output on
Turn the output on by pressing the
OUTPUT ON/OFF
OUT
PUT
ON / OFF
control.
The ON/OFF indicator LED lights and measurements begin.
3. Step 5: Observe measurements
4. Observe the measured voltage on the main area of front
panel display. The readings should be very close to the 100 V
source value.
Step 6: Turn output off
When you finish making measurements, turn the output off by
pressing the
OUTPUT ON/OFF
OUT
PUT
ON / OFF
control. OUTPUT ON/OFF
control.
The output indicator LED turns off.
NOTE
These steps confirm basic functionality of your instrument. Turn
the instrument power OFF now.
The examples in the
Model 2657A User’s Manual
demonstrate
2657A functionality. We strongly recommend that first-time users
complete the examples in the user’s manual.
FAQs
I need a different line frequency or voltage. What should I do?
The 2657A requires a line voltage of 100 V ac to 240 V ac
(±10%) and a line frequency of either 50 Hz or 60 Hz. Keithley
Instruments configures the 2657A to the line frequency
appropriate to the final shipping destination of the instrument. This
line frequency is used for aperture (NPLC) calculations for the
integrating analog to digital converter (ADC).
You can manually configure the instrument to match the actual
line frequency.
