christopher.guido@LIGO.ORG - posted 17:27, Friday 09 September 2011 - last comment - 17:46, Friday 09 September 2011(1374)
S1103182 Chasis changes (again) and recalibration
Steve O'Connor, Aidan Brooks, Christopher Guido Wednesday night, we made a series of resistor changes to the S1103182 chassis(on both boards S1103183 and S1103184)which can be seen in yesterday's post, but today, we reverted the resistors back to the original values except for R44. These changes will be uploaded to the traveler. Afterwards, we tested the board (results attached as excel spreadsheet) and used the results to calibrate the H2TCS-ITMY_RING_HEATER screen. The changes to the gain and offset(in the filters) are listed below H2TCS_ITMY_RING_HTR_SEG1_I_MON Offset = -3.22 counts Gain = -0.0247 mA/count H2TCS_ITMY_RING_HTR_SEG2_I_MON Offset = -7.135 counts Gain = -2.456e-2 mA/count H2TCS_ITMY_RING_HTR_SEG1_V_MON Offset = -145.2 counts Gain = 1.281e-3 V/count H2TCS_ITMY_RING_HTR_SEG2_V_MON Offset = -129.9 counts Gain = 1.364e-3 V/count
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Full details of ring heater calibrations. We noted that the measured current to the load was about 3.5% lower than the requested current. Once the ring heater is actually in place we plan on doing a more thorough calibration. H2:TCS-ITMY_RING_HTR_SEG1_I_MON_OFFSET = -3.22 counts deWhiten = zero at 0.4Hz, poles at 10 Hz, 1000Hz H2:TCS-ITMY_RING_HTR_SEG1_I_MON_GAIN = -2.47E-2 mA/count H2:TCS-ITMY_RING_HTR_SEG1_V_MON_OFFSET = -145.2 counts deWhiten = zero at 0.4Hz, poles at 10 Hz, 1000Hz H2:TCS-ITMY_RING_HTR_SEG1_I_MON_GAIN = 1.283E-3 V/count H2:TCS-ITMY_RING_HTR_SEG1_TEMPERATURE_MON_OFFSET = -16192 counts pole0.3Hz = pole at 0.3Hz H2:TCS-ITMY_RING_HTR_SEG1_TEMPERATURE_MON_GAIN = 1.6E-2 deg C/count H2:TCS-ITMY_RING_HTR_SEG1_LV_MON_GAIN = 1.235E-3 V/count H2:TCS-ITMY_RING_HTR_SEG1_AC_I_SET_GAIN = 40.96 counts/mA H2:TCS-ITMY_RING_HTR_SEG1_DC_I_SET_GAIN = 40.96 counts/mA H2:TCS-ITMY_RING_HTR_SEG1_ISQR_PWR_RAD_GAIN = 1E-6 W^2/(mW^2) H2:TCS-ITMY_RING_HTR_SEG1_MEASURED_R_GAIN = 1E3 Ohms/(kOhm) H2:TCS-ITMY_RING_HTR_SEG1_VI_PWR_RAD_GAIN = 1E-3 W/(mW) H2:TCS-ITMY_RING_HTR_SEG2_I_MON_OFFSET = -7.1 counts deWhiten = zero at 0.4Hz, poles at 10 Hz, 1000Hz H2:TCS-ITMY_RING_HTR_SEG2_I_MON_GAIN = -2.456E-2 mA/count H2:TCS-ITMY_RING_HTR_SEG2_V_MON_OFFSET = -129.9 counts deWhiten = zero at 0.4Hz, poles at 10 Hz, 1000Hz H2:TCS-ITMY_RING_HTR_SEG2_I_MON_GAIN = 1.364E-3 V/count H2:TCS-ITMY_RING_HTR_SEG2_TEMPERATURE_MON_OFFSET = -16192 counts pole0.3Hz = pole at 0.3Hz H2:TCS-ITMY_RING_HTR_SEG2_TEMPERATURE_MON_GAIN = 1.6E-2 deg C/count H2:TCS-ITMY_RING_HTR_SEG2_LV_MON_GAIN = 1.235E-3 V/count H2:TCS-ITMY_RING_HTR_SEG2_AC_I_SET_GAIN = 40.96 counts/mA H2:TCS-ITMY_RING_HTR_SEG2_DC_I_SET_GAIN = 40.96 counts/mA H2:TCS-ITMY_RING_HTR_SEG2_ISQR_PWR_RAD_GAIN = 1E-6 W^2/(mW^2) H2:TCS-ITMY_RING_HTR_SEG2_MEASURED_R_GAIN = 1E3 Ohms/(kOhm) H2:TCS-ITMY_RING_HTR_SEG2_VI_PWR_RAD_GAIN = 1E-3 W/(mW)