Tektronix Keithley 2651A Reference Manual page 847

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Warmup period
Allow the Model 2651A to warm up for at least two hours before adjusting the instrument.
If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the internal temperature of the instrument to stabilize. Typically, allow
one extra hour to stabilize an instrument that is 10 °C outside the specified temperature range.
Allow the test equipment to warm up for the minimum time specified by the manufacturer.
Adjustment considerations
When performing the adjustment procedures:
•
Make sure that the test equipment is properly warmed up and connected to the correct Model
2651A terminals.
•
Always allow the source signal to settle before calibrating each point.
•
Do not connect test equipment to the Model 2651A SMU through a scanner or other switching
equipment.
•
If an error occurs during calibration, the Model 2651A will generate an appropriate error message.
See Error summary list
The maximum common-mode voltage (voltage between LO and chassis ground) is 250 V dc.
Exceeding this value may cause a breakdown in insulation, creating a shock hazard that
could result in personal injury or death.
The input/output terminals of the Model 2651A High Power System SourceMeter
SMU are rated for connection to circuits rated Measurement Category I only, with transients
rated less than 1500 V peak above the maximum rated input. Do not connect the Model 2651A
terminals to CAT II, CAT III, or CAT IV circuits. Connection of the Model 2651A terminals to
circuits higher than CAT I can cause damage to the equipment or expose the operator to
hazardous voltage.
Hazardous voltages may be present on all output and guard terminals. To prevent electrical
shock that could cause injury or death, never make or break connections to the Model 2651A
while the instrument is powered on. Turn off the equipment from the front panel or
disconnect the main power cord from the rear of the Model 2651A before handling cables.
Putting the equipment into standby does not guarantee that the outputs are powered off if a
hardware or software fault occurs.
2651A-901-01 Rev. C October 2021
(on page 8-3) for more information.
Section 12: Calibration
®
instrument
12-17