Tektronix Keithley 2260B Series - Page 176

2260B Series User Manual
172
The accuracy does not match the specification.
Make sure the device is powered On for at least 30 minutes, within
+20°C~+30°C. This is necessary to stabilize the unit to match the
specification.
For more information, contact your local Tektronix-Keithley
representative.