The lids are raised and lowered with the assistance of internally fitted gas struts. A safety cut out device is fitted which prevents the tubes from operating when the lid is raised. An electronic tube status indicator displays on the control panel that all the UV tubes are working. The same 0-999 second timer is included in both models. A digital display shows the time in one second intervals.
Operation is very easy, set the time, close the lid and press the start button.
Exposure on the AX models starts immediately. During exposure the time counts down and when complete the display returns to its original setting, an exposure complete LED illuminates and a buzzer sounds for 2 to 3 seconds. The exposure completion indicating LED will remain on and the timer inactive until the lid is raised and lowered, or the unit is turned off and on. This acts as a fail safe against the possibility of double exposures. The two AX pressure pad units illustrated here have glass in the lid and a foam base.