2002-06-17T18:26:23.000 \header System = GRS Author = mward Institution = UofAz Start_time = 06/17/02 18:00 Stop_time = 06/18/02 17:40 Send_time = Mon Jun 17 18:26:23 GMT 2002 \text Purpose: Try to get better control of the CEB by increasing the temperature set points and changing from PS2 to VREF. Understand the cooling trend of the GPA by dropping the temperature by 5 degrees for 30 minutes. Continue to characterize the thermal connection between the OS and the MR by dropping the MR set points over time. Switch the MR heater from the MR secondary to the MR op heater to tighten the control. Tighten CEB heater more by changing the collect to 5 seconds. Expected result: The CEB temperature will increase slightly. The CEB heater will be controlled by the VREF sensor rather than the PS2 sensor. The GPA will cool for 30 minutes then warm back up to -30 with the MR at -75C and again with the MR at -90C. The MR temperature will drop from -75C to -90C in 5 degree steps. The MR heater control will switch from the MR secondary heater to the MR op heater. CEB temperatures will be collected every 5 seconds. Why it is needed: In order to improve the thermostatic control of the CEB heater (and thus reduce temperature drift effect on the Gamma data). In order to evaluate the behavior of the MR at a lower temperature and its effect on GPA thermostatic control. In order to evaluate the nature of MR secondary versus MR op heater control. Commands to be sent: /u/msop/mward/Post-MOI_Commands_1/c01grs_ceb_htr_mr_gpa_adj_2.bcf 2962, immediate, CHG_ANALOG, GAMMA_VREF_TEMP, LESS_COMPARE_VALUE, 2930 2963, immediate, CHG_ANALOG, GAMMA_VREF_TEMP, GREATER_COMPARE_VALUE, 2931 2738, immediate, CHG_ANALOG, GAMMA_GPA_TEMP, LESS_COMPARE_VALUE, 6617 2739, immediate, CHG_ANALOG, GAMMA_GPA_TEMP, GREATER_COMPARE_VALUE, 6618 2701, immediate, CHG_ANALOG, CEB_PS2_TEMP, COMPARE_SETTING, 0 1134, + 0-1 , EXEC_SEQ, 34, 1 2742, + 0-90 , CHG_ANALOG, GAMMA_GPA_TEMP, LESS_COMPARE_VALUE, 6356 2454, + 0-90 , CHG_ANALOG, GAMMA_GPA_TEMP, GREATER_COMPARE_VALUE, 6357 2799, + 0-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, LESS_COMPARE_VALUE, 2126 2800, + 0-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, GREATER_COMPARE_VALUE, 2147 2802, + 3-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, LESS_COMPARE_VALUE, 2331 2803, + 3-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, GREATER_COMPARE_VALUE, 2351 2973, + 6-0 , CHG_ANALOG, GAMMA_VREF_TEMP, COLLECTION, 2 2804, + 6-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, LESS_COMPARE_VALUE, 2534 2491, + 6-270 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, GREATER_COMPARE_VALUE, 2554 2738, + 12-270 , CHG_ANALOG, GAMMA_GPA_TEMP, LESS_COMPARE_VALUE, 6617 2739, + 12-270 , CHG_ANALOG, GAMMA_GPA_TEMP, GREATER_COMPARE_VALUE, 6618 2742, + 13-0 , CHG_ANALOG, GAMMA_GPA_TEMP, LESS_COMPARE_VALUE, 6356 2454, + 13-0 , CHG_ANALOG, GAMMA_GPA_TEMP, GREATER_COMPARE_VALUE, 6357 2082, + 13-268 , CHG_ANALOG, CEB_MNT_RNG_TEMP_A, COMPARE_SETTING, 0 1309, + 13-269 , ANNEAL_PWR_CNTRL, 3, OFF 1024, + 13-270 , EXEC_SEQ, 24, 0 1041, + 13-273 , EXEC_SEQ, 41, 0