Several Tascam DR-40 recorders are available from the Architecture IT office and the NYC Program Coordinator.
Link to manual: PDF.
On the left side, set the EXT IN slider to the middle position 'MIC'.
Also press the REC MODE button on the front and set source to INT MIC ST
Press the Record button once and it will flash red. Press a second time and to start recording--it will be steady red. The counter will increase while recording.
To quickly delete the current file, press the Quick button.
Choose Delete using the Enter/Mark button.