1.1.4. Start the TEGA 386 FS

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1. Turn on EGA
2. 2.1.1. TEGA/FSW:EGA:Change EGA State
3. 2.1.2. Restore the modes from EEPROM 0
4. 2.1.3. EGA Commands:Restore Mode
5. 2.1.4. Run mode 37
1. OPEN GEC Vent Valve
2. Warm up EGA: CALL tega_ega_emission_warmup (filament 1, calibration_set, high_current, mult_volt, four_volt, channels) 6 inputs

4.1.1. Note: IF pass through was selected as HIGH, calibration set cannot equal 3

4.2. Calls tega_ega_prep, filament-14.2.1.1.Sets JPlate 0 to -107V
4.2.1.2.Sets Jplate 1 to -92V
4.2.1.3.Start SM 1 pause 1 sec
4.2.1.4.Set MV 3300V Pause 1 sec
4.2.1.5.Ion Pump ON
4.2.1.6.Pause 1 second
4.2.1.7.Emission ON
4.2.1.8.Pause 2 Minutes
4.2.1.9.Stop SM 1

4.3. If pass thru = 1, emission current will change to HIGH

4.4. Change engineering transmit time to 10 seconds

4.5. Call ega_calibration_scans (Set =3, exit = 3300V) inputs calibration_set, high_emission, channels, scan_voltage, chan_four_voltage, exit_voltage

4.6. Start SM 3

4.7. Pause 20 minutes

4.8. Stop SM 3

4.9. Pause 1 minute

4.10. Calls tega_ega_gain

4.10.1.1.1. Start SM 2

4.10.1.1.2. Pause 1 minute

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

4.10.1.1.4. Remain at 3300V

4.10.1.1.5. Stop SM 2

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4.10.1.1.6. Run Sweep 38

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

(no pump nudge)

Measure residuals and get set up

1. Calibrate EGA: CALL tega_ega_calibration_scans (set = 3, exit=3300 V) ) inputs calibration_set, high_emission, channels, scan_voltage, chan_four_voltage, exit_voltage
2. 6. Start Supermode 6

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20. Turn off TEGA: CALL tega_power_off

20.1.1. Turn off the third TEGA switch

20.1.2. Turn off the second TEGA switch

20.1.3. Turn off the first TEGA switch

20.1.4. FPGA Dump – Aker Valve state

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Outline numbered + Level: 1 + Numbering Style: 1, 2, 3, … + Start at: 1 + Alignment: Left + Aligned at: 0 pt + Tab after: 18 pt + Indent at: 18 pt

Indent: Left: 0 pt, Tabs: Not at 27 pt

TA Manifold +65C Plumbing 1 +65C Plumbing 2 +35C Transfer Tube +75C EGA Plumbing +45C EGA manifold to +35 C Wedge Heater @ 10% duty cycle

0 minutes for residuals for isotopes

Stop SM 9 Run 100 iterations of hop mode 6 (Deuterium) (takes 264 seconds) Stop hop mode 6 Start Supermode 6 (Soil: Low Emission Quick) (This mode does the same as SM 4, but

adds organics, S, and CO)

Pause 5 minutes

Stop SM 6

Briefly measure atmosphere on TA inlet

Start SM 4 (Atmosphere: Low Emission Quick)Pause 60 sec Open TA Sample valve (to measure atmosphere)Pause 120 sec Stop SM 4 (done by cal scans block at step 29)Run cal scans with set 3, exit 3300 ) inputs calibration_set, high_emission, channels,

scan_voltage, chan_four_voltage, exit_voltage

Start SM 9 (Atmosphere: Low Emission)Pause 15 minutes for atmosphere analysisStop SM 9 Start SM 4 (Atmosphere: Low Emission Quick)Close oven inlet valve (to terminate venting of manifold)

Measure Cal Gas

Start regulating Cal Gas at 210 mbar

Close TA Sample Valve Stop regulating Cal Gas Turn OFF Cal Tank Heater Pause 60 seconds Open oven outlet valve to empty TA manifold Stop SM 4 Start SM 6 (Soil: Low Emission Quick) Pause 5 minutes Close oven outlet valve. Start SM 9 (Atmosphere: Low Emission) Pause 20 min (to get precision sufficient to meet requirements on CO2) Stop SM 9 Run 100 iterations of hop mode 6 (Deuterium) (takes 264 seconds) Stop hop mode 6 Start Supermode 4 (Atmosphere: Low Emission Quick) Pause 1 minute Open TA sample valve (This should be nearly all atmosphere now in the EGA manifold

since we have not been flowing cal gas for

32 minutes) Pause 5 min (to see if atmosphere is still diffusing in)Close TA Sample valve

Measure background, which consists of atmosphere in the TA sample valve

Pause 1 min Stop SM 4 Start SM 9 Pause 20 minutes Stop SM 9 Run 100 iterations of hop mode 6 (Deuterium) (takes 264 seconds) Stop hop mode 6 Run sweep 38 Run Supermode 4 Pause 1 minute

Measure atmosphere via Atmosphere inlet

Open Atmosphere valve Pause 2 minutes Stop SM 4 Start SM 9 (Atmosphere: Low Emission) Pause 10 minutes Run sweep

Run 100 iterations of hop mode 6 (Deuterium) (takes 264 seconds) Stop hop mode 6 Start Supermode 9 Pause 20 minutes Run Supermode 6 Pause 4 minutes

Watch for change in isotope ratios as count rate drops

Close Atmosphere valve Pause 1 minute Stop SM 6 Start Supermode 9 Pause 30 minutes Begin regulation of carrier gas at 35 mbar (to flush atmosphere out of EGA manifold) Stop SM 9 Start SM 6 Pause 4 minutes Stop SM 6 Run 100 iterations of hop mode 6 (Deuterium) (takes 264 seconds) Stop hop mode 6 Start SM 9 Pause 30 minutes Stop SM 9 Start SM 4 (Atmosphere: Low Emission Quick) Pause 2 minutes

Open TA sample valve to flush atmosphere out of CML volume

Open TA Sample valve Stop Carrier from regulation Pause 5 minutes for pressure to decay. Close TA Sample Valve Stop SM 4

Shut down

Run tega_disable_heater_control (Turn all remaining heaters off)