Ametek Spectro MIDEX Original Operating Instructions page 18

Operation
6. For the purpose of checking the safety circuits you will be prompted to open
and close the sample chamber lid. Follow the instructions on the screen.
7. Wait until the initialization procedure for the instrument has been carried out
and then click on "Activate Standby Mode" to switch the instrument to standby
mode.

The instrument is switched on. In order to ensure stable measurement
conditions, it is highly recommended to wait 20 minutes before starting the
measurements.
— 18 SPECTRO MIDEX — 05.10.2017