M9/M11 Sterilizer Select Cycle Mode Theory of Operation
To prevent risk of shock always disconnect power before removing covers or performing any service procedure.
Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.
The illustrations call out the components that are energized / monitored during the Select Cycle Mode. Refer to the dropdowns for detailed descriptions of the Select Cycle Mode.

Model |
M9/9D -020 thru -022, -033, -034 |
M11/11D -020 thru -022, -033, -034 |
Serial Number | All | All |
During the Select Cycle Mode, the air valve is energized for ten minutes after a cycle is completed or after Power-Up Mode.
All electrical current is supplied thru the two high-limit thermostats on bottom of chamber. Refer to: Power Up Mode for further detail.
Pressing the start button when SELECT CYCLE is displayed at the beginning or end of a cycle activates the heater for 10 minutes. The display flashes ADDITIONAL HEAT. This allows the Operator to preheat the chamber before starting an operation or to add additional time to the Dry mode at the end of an operation. Pressing STOP will end the Additional Heat time. Additional Heat can only be activated once between sterilization cycles.

For the first ten minutes of the Select Cycle Mode, line voltage is supplied to the normally closed air valve. When energized, the air valve opens. This allows air to pass thru the valve, preventing pressure from building in the chamber.

Model |
M9 -040 thru -043 | M9D -042 | M11 -040 thru -043 |
Serial Number | All | All | All |
During the Select Cycle Mode, the air valve is energized for ten minutes after a cycle is completed or after Power-Up Mode.
All electrical current is supplied thru the two high-limit thermostats on bottom of chamber. Refer to: Power Up Mode for further detail.
Pressing the start button when SELECT CYCLE is displayed, at the beginning or end of a cycle, activates the heater for 10 minutes. The display flashes ADDITIONAL HEAT. This allows the Operator to preheat the chamber before starting an operation or to add additional time to the Dry mode at the end of an operation. Pressing STOP will end the Additional Heat time. Additional Heat can only be activated once between sterilization cycles.

For the first ten minutes of the Select Cycle Mode, line voltage is supplied to the normally closed air valve. When energized, the air valve opens. This allows air to pass thru the valve, preventing pressure from building in the chamber.