Sn4801 - innova fluoro taper calibration problems on pre-unity sw releases, innova single plane

Sn4801 - innova fluoro taper calibration problems on pre-unity sw releases, innova single plane 29 Feb 2008 SERVICE NOTE Page 1 of 5 Innova Single Plane SN4801 Rev. 1 5305770-8EN INNOVA FLUORO TAPER CALIBRATION PROBLEMS ON PRE-UNITY SW RELEASES APPLIES TO Model No. Innova 2000, Innova 2100-IQ / 3100 / 4100 All, Liberty, Liberty30, Bolus, Zenith, Unity M3A PURPOSE/SYMPTOM During Fluoro Taper calibration, the measured values are too low / too high, and cannot be submitted in the SUIF. PROBLEM In the SUIF, there is an acceptance range defined on the input values (5-20 R/min, in “5R” countries, 2.5-10 R/min), and the values outside this range are rejected, i.e. after writing them in the SUIF, the user cannot go to the next calibration step. Also, there is an acceptance range defined on the Calibration values, and if the inputs’ extreme value result in an out-of-range calibration value, the calibration cannot be submitted. There is no direct correspondence between the Calibration value acceptance range, and the range of acceptable doses (dependant on system performance), but typically, values outside the range 6-16 R/min (in “5R” countries, 3-8 R/min) are rejected. Several different root causes can result in these types of calibration issues.