This is the trending report for UVES gain QC parameter derived from Detector-Monitoring frames.
These frames are taken approximately once per month, as a set of 25 consecutive exposures, 5 BIAS frames and 10 pairs of FLATs of varying exposure time and thus various signal level designed to sample the full dynamic range of the detector.
These plots describe:

1. the measured GAIN of the BLUE chip in the 1x1 binning, 225kHz, low gain readout mode
2. the measured GAIN of the LOWER RED chip in the 1x1 binning, 225kHz, low gain readout mode
3. the measured GAIN of the UPPER RED chip in the 1x1 binning, 225kHz, low gain readout mode
4. the measured GAIN of the BLUE chip in the 2x2 binning, 50kHz, high gain readout mode
5. the measured GAIN of the LOWER RED chip in the 2x2 binning, 50kHz, high gain readout mode
6. the measured GAIN of the UPPER RED chip in the 2x2 binning, 50kHz, high gain readout mode

1. BLUE Chip low gain: 1.84 (0.54)
2. RED CHIPL low gain: 1.5 (0.67)
3. RED CHIPU low gain:1.4 (0.71)
4. BLUE Chip high gain: 0.54 (1.85)
5. RED CHIPL high gain: 0.52 (1.92)
6. RED CHIPU high gain: 0.46 (2.17)

1. BLUE_1x1_225 VAL=0.461,0.483 REF=0.472
2. REDL_1x1_225 VAL=0.569,0.617 REF=0.593
3. REDU_1x1_225 VAL=0.543,0.567 REF=0.550
4. BLUE_2x2_50 VAL=1.649,1.681 REF=1.665
5. REDL_2x2_50 VAL=1.714,1.756 REF=1.735
6. REDU_2x2_50 VAL=1.867,1.895 REF=1.881