August 6, 2008 TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

Reconciled with block: __tega_prep_for_xfer_r30_ta5, tega_sample_process/r55_______________

Objectives:

Power on and perform the low-temperature ramp on a surface soil sample just acquired. This sample will be taken right next to Rosy Red, the sample put into the first WCL cell. After warm up, we will collect residual data for 7 to 43 minutes (depending on the time the shaker runs) then begin the ramp program. We analyze the atmosphere via the TA inlet for 16 minutes followed by 15.5 minutes of carrier gas analysis. We have 10 minutes of supermode 7 which will get background isotope ratios The ramp assumes we start early in the morning (6:00 am). It starts at -40 C and goes to - 30 C and holds to look for a temperature change upon oven closing. We then ramp back down to -40 C in anticipation of starting the heating ramp. We will not do a measurement of heat capacity, as it is felt the heating to -10 compromises our ability to detect a low-T melting of ice (due to salt). We turn off the gas flow to prevent blowing any melt water out of the oven, and after allowing time for the pressure to bleed off, we then ramp to +35 C with no carrier gas flow. We do not flow carrier allowing for the vapor pressure of water to drive the water vapor out of the oven. We capture a gas sample following a 3-minute hold at +35 C. At this temperature we allow 61 minutes for any water to

vaporize. We run calibration gas at the end of the run and we have two different pressure settings for the TA manifold for calibration of the sensor.

Note: This block will run at LOW emission unless otherwise requested by the Instrument Lead.

Configuration:

This is our third sample. Delivery to TA5 on Sol ______. Delivery will be done via sprinkle method with a “tent” delivery.

Constraints:

Verify Door Open for TA Complete: TA5 Door is “partially” opened

This will be an early morning delivery between 5 – 6am. Current ramp assumes a 15 minute oven close.

Gas(es) used: Carrier and Calibration. Mars ATM will also be collected through the TA Samplevalve.Filaments used: 1 SW Version (386): V513 SW Version (EGA): V321 Sweep and hop mode version(s): MODE TABLE V123. Super modes and Sweep modes used: Supermodes 1, 2, 3, 4, 6, 7, 9 and 12; Sweeps 37, and 38.

August 6, 2008TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

Super modes used in Ramp: 4,6,7,9 & 12

Note: TEGA is checked to see if TEGA is safed. If so, abort self to end activity

1. Turn ON TEGA – Call TEGA_power_on – This is controlled by the interop science master

1.1.1. TEGA_MAIN1_PWR "ON"
1.1.2. TEGA_MAIN2_PWR "ON"
1.1.3. TEGA_MAIN3_PWR "ON"
1.1.4. Start the TEGA 386 FSW

TEGA_PREP_FOR_XFER STARTS HERE: reconciled with block R30

  1. Pause 3 Minutes (collect engineering data at a high rate before turning down) – This pause is controlled by interop science master, it may vary with pre-heat delay requirements)
  2. Call Sequence 30A

Open inlet and outlet valves (on TA-0) to empty manifold

  1. Select TA 3 for steps 5 & 6
  2. Open Inlet Valve (TA3)
  3. Open Outlet Valve (TA3)
  4. Pause 30 seconds to allow commands on delayed list to clear before EGA Turn on
    1. Turn on EGA
    2. 8.1.1. TEGA/FSW:EGA:Change EGA State
    3. 8.1.2. Restore the modes from EEPROM 0
    4. 8.1.3. EGA Commands:Restore Mode
  5. OPEN GEC Vent Valve
  6. Activate Sequence 24 A (Turns up readings for regulating temps)
  7. Set Manifold Heater to -30C (execute Sequence 3b)
  8. Warm up EGA: CALL tega_ega_emission_warmup

12.1. (LOW), Calibration Set 3, 3200V)

12.1.1. Note: IF pass through was selected as HIGH, calibration set CANNOT equal 3

12.2. Calls tega_ega_prep, filament-1

August 6, 2008 TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

12.2.1.1. Sets JPlate 0 to -107V

12.2.1.2. Sets Jplate 1 to -92V

12.2.1.3. Pause 5 seconds

12.2.1.4. Set MV 2800V Pause 1 sec

12.2.1.5. Ion Pump ON Pause 30 secs

12.2.1.6. Start SM 1, pause 1 sec

12.2.1.7. Emission ON

12.2.1.8. Pause 2 Minutes

12.2.1.9. Stop SM 1

12.3. Pause 2 minutes (provides time for ion pump to stabilize)

12.4. Change engineering transmit to 10 secs

12.4.1. IF pass thru = 1, emission current will change to HIGH

12.5. Call tega_ega_calibration_scans, 3200

12.5.1. MV exits at 3200V

12.6. Wait 1 second
12.7. Start SM 3
12.8. Pause 20 minutes
12.9. Stop SM 3
12.10. Pause 1 minute

12.11. Calls tega_ega_gain

12.11.1.1.1. Start SM 2

12.11.1.1.2. Pause 1 minute

12.11.1.1.3. Set MV 2600 – 3400V (1 minute per voltage)

12.11.1.1.4. Remain at 3200V

12.11.1.1.5. Stop SM 2

12.11.1.1.6. Run Sweep 38

EGA is warmed up and ready to go (54 mins)

13. Calibrate EGA: CALL tega_ega_calibration_scans (set = 3, exit=3200 V)

Measure residuals

14. Start Supermode 7: Soil volatiles (3200 V)

Warm up pressure sensors so we get reliable pressure readings

3 August 6, 2008 TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

  1. Set EGA manifold heater to +35 C
  2. Set TA manifold heater to -10 C
  3. Pause 7 minutes (collect residual gas background prior to collecting sample}
  4. Set up LED Ignore Diff Parameters (this has been updated to 20%)

We will get a good calibration point here for the TA manifold sensor at -10 C and ambient pressure.

  1. Close Inlet Valve
  2. Close Outlet Valve

END OF TEGA_PREP_FOR_XFER

  1. Wait for RA ready signal. – RA Waits for TEGA DONE
  2. Send signal to RA saying we are ready. (End of tega_prep – TEGA_block_done goes true)

22.1. NOTE: ENDS WITH GEC VENT VALVE OPEN

SAMPLE_PROCESS STARTS HERE

Select Oven TA__5_ –TWEAKABLE

    1. Start shaker – Call tega_fill_oven(We will measure residuals during shaking)
    2. 23.1. shake duration = 180 seconds
    3. 23.2. shake cool down = 180 seconds
    4. 23.3. fill_cycles = 6 (shaking will continue to loop, unless oven full is detect
  1. Wait for shaker to complete - IF oven does not go full within the 6 cycle limit, TEGA will safe.
  2. Start Ramp ________________________________________________ (TWEAKABLE
  3. Initiate oven close (15 minutes) – Need verified for Sol 72
  4. Pre_heater_delay = 2290 secs – TWEAKABLE
  5. Set TA Manifold heater to +65C
  6. Set Plumbing 1 to +50C

August 6, 2008 TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

    1. Run tega_init_heater_control
    2. 30.1.1.1. Execute Sequence 24A
    3. 30.1.1.2. TA Manifold +65C
    4. 30.1.1.3. Plumbing 1 +35C
    5. 30.1.1.4. Plumbing 2 +35C
    6. 30.1.1.5. Transfer Tube +75C
    7. 30.1.1.6. EGA Plumbing +45C
    8. 30.1.1.7. EGA manifold to +35 C
    9. 30.1.1.8. Wedge Heater @ 10% duty cycle
  1. Pre-Sweep_Delay = 2500 seconds - TWEAKABLE
  2. Stop supermode immediate
  3. Run sweep mode 38 (Starts ~ 83 mins after ramp started, 30 mins after gas sample is captured)
  4. Run Supermode 7: Soil volatiles (3200 V)
  5. Post-Sweep Delay = 1920 seconds -TBR The next step turns on the cal tank heater 10 minutes before gas is needed – TWEAKABLE
    1. Start Cal Tank Regulate to +10C (TA5)(turn up engineering readings)
    2. 36.1. Default value is “99” – Cal Tank heater not turn on)
    3. 36.2. Set on Timer 1
  6. Post_cal_tank_delay = 2460 TBR (The next step turns off the cal tank heater 1 minute after we are done with it) – TWEAKABLE
  7. Turn off cal tank heater (if we had turned it on, so we can see water freeze)
  8. Wait for ramp to complete

1.1. Timeout = TBR (TA5) (TWEAKABLE)

Shut down

  1. Run tega_disable_heater_control (Turn all remaining heaters off)
  2. Close bypass valve
  3. Stop SM 6
  4. Close GEC Vent Valve

August 6, 2008 TEGA_low_T_with_acquire_V1_r6.doc

TEGA Low Temp Soil –With Acquire

    1. Turn off EGA: CALL tega_ega_off EGA Shutdown:
    2. 44.1.1. Multiplier Voltage OFF
    3. 44.1.2. Wait 5 secs
    4. 44.1.3. Emission Off
    5. 44.1.4. Wait 5 secs
    6. 44.1.5. Ion Pump Control OFF
    7. 44.1.6. Activate Sequence 7A to turn the EGA OFF
  1. Turn off TEGA: CALL tega_power_off

45.1.1. Turn off the third TEGA switch

45.1.2. Turn off the second TEGA switch

45.1.3. Turn off the first TEGA switch

45.1.4. FPGA Dump – Aker Valve state