Laboratory instrument with safety indicator

1 . A laboratory instrument for processing at least one sample, the laboratory instrument comprising:

a. at least one housing having at least one sample processing device disposed therein;

b. at least one reagent storage compartment reversibly removable from the housing, and

c. at least one safety indicator, the safety indicator being configured for indicating if the reagent storage compartment has been removed from the housing and reinserted into the housing, wherein the laboratory instrument is configured for automatically altering a detectable state of the safety indicator during the process of removing and reinserting the reagent storage compartment,

wherein the laboratory instrument is electrically operable in a powered state, wherein the reagent storage compartment is reversibly removable from the housing in an unpowered state, and wherein the safety indicator is configured for indicating if the reagent storage compartment has been removed from the housing and reinserted into the housing during a period in which the laboratory instrument was unpowered;

wherein the safety indicator comprises at least one movable indicator element configured for being brought into at least one armed position and into at least one disarmed position, and at least one readout unit for detecting whether the movable indicator element is in the armed position or in the disarmed position;

wherein the laboratory instrument further comprises at least one compartment actuator configured for bringing the movable indicator element from the armed position into the disarmed position when the reagent storage compartment is removed from the housing, and configured for leaving the movable indicator element in the disarmed position when the reagent storage compartment is reinserted into the housing;

and wherein the laboratory instrument further comprises at least one control unit configured for receiving and evaluating a readout signal indicating a state of the safety indicator and configured for performing at least one automatic teaching procedure when the readout signal indicates that the reagent storage compartment has been removed from the housing and reinserted into the housing.

2 . The laboratory instrument of claim 1 , wherein the compartment actuator is a mechanical compartment actuator mechanically acting on the movable indicator element.

3 . The laboratory instrument of claim 1 , wherein the laboratory instrument further comprises at least one indicator actuator, wherein the indicator actuator is configured for bringing the movable indicator element into the armed position.

4 . The laboratory instrument of claim 1 , wherein the laboratory instrument is configured for mechanically bringing the movable indicator element from the armed position into the disarmed position when the reagent storage compartment is removed from the housing, wherein the laboratory instrument is further configured for leaving the movable indicator element in the disarmed position when the reagent storage compartment is reinserted into the housing, wherein the laboratory instrument is further configured for performing at least one automatic teaching procedure when the movable indicator element is detected to be in the disarmed position and further is configured for bringing the movable indicator element back into the armed position.

5 . The laboratory instrument of claim 1 , wherein the movable indicator element comprises at least one rotatable movable indicator element, wherein the armed position and the disarmed position are different rotational positions of the rotatable movable indicator element.

6 . The laboratory instrument of claim 5 , wherein the rotatable movable indicator element comprises at least one toothed wheel having at least one tooth, wherein the reagent storage compartment is configured to mechanically act upon the tooth of the toothed wheel when the reagent storage compartment is removed from the housing, wherein the reagent storage compartment further is configured not to act upon the tooth of the toothed wheel when the reagent storage compartment is reinserted into the housing.

7 . The laboratory instrument of claim 6 , wherein the toothed wheel comprises at least two teeth, wherein the reagent storage compartment is configured to mechanically act upon at least a first tooth of the teeth, wherein the readout unit further is configured for detecting at least a second tooth of the teeth.

8 . A method of operating the laboratory instrument of claim 1 , the method comprising:

i. receiving at least one readout signal from the safety indicator;

ii. checking if the readout signal indicates that the reagent storage compartment has been removed from the housing;

iii. depending on the result of step ii., performing at least one automatic teaching procedure of the laboratory instrument.