| Description: | The tube heater is not functioning properly. On 6/27/06, site operations personnel
indicated the heater plug was found to be disconnected (The heater became disconnected on
6/12/06). It was reconnected and while the head temperature returned to normal, the tube
temperatures are still bad.
The purpose of the tube heater is to help prevent condensation from forming on the window.
The mentor has not noticed any problems with the data resulting from the tube heater
malfunction. However, since the instrument is technically not fully functional, this DQR
is being issued.
A repair attempt was made on June 7, 2007 that resulted in the tube temperatures reaching
at times into the upper 50s and sometimes even the lower 60s. The high tube temps
influenced the head temperature causing it to move into the upper 40s and sometimes the lower
50s.
The heater was repaired on Oct 11, 2007. Though repaired, the instrument was configured
to keep the tube temp in the lower 20s (deg C). This is acceptable, though to keep with
instrument specifications the setting was adjusted to keep the temps in the upper 30s (deg
C). This occurred on 8 Jan, 2008. |