Tektronix Keithley DMM7510 Quick Start Manual page 11

The DMM7510 must be turned on and allowed to warm up
for at least 90 minutes to achieve rated accuracies.
To connect line power and turn on the instrument:
1. Make sure the front-panel power switch is in the off (0)
position.
2. Connect the socket of the supplied power cord to the
power module on the rear panel.
3. Connect the plug of the power cord to a grounded AC
outlet.
4. Press the front-panel power switch to on (1) position.
Connect