Hello. I need some assistance. In our blood bank, we are supposed to check that our chart temperature recorders move and record the temperature at the point where a high or low alarm sounds on our refrigerators, freezers, and platelet incubators. The problem is, most devices now have alarm checks that are in the computer software, so when they are activated, they do not change the cabinet temperature, and therefore do not make the chart pen move. Now for the refrigerators and platelet incubators, that's not a problem because we can warm and cool the probes. The problem is our freezers. We have a plasma freezer at about -25 C and a deep freezer at about -85 C. Does anyone out there do this procedure and how do you do it? Does anyone mind sharing? Is it even mandatory to do this?