osphere sample a

cal gas analysis and no outgassing of the TA manifold. A large part of the run is done entirely on h emission. We have 60 minutes to measure the background and 90 minutes to measure the osphere. At the end we have 20 minutes on low emission to watch the effect of count rates losses the mass-44 peak. We will first take an atmosphere sample via the TA Sample inlet so that we can asure mass 44. (The count rate of mass 44 is too high using the atmosphere inlet and high emission ermit analysis.) nfiguration: st Surface Phase Sample w

o

nstraints:

view data from Checkout II to confirm dN numbers for regulation for in activity block and ramp ments.

view data from Sutrument modes on

s(es) used: Mars ATM will also be collected through the ATM Sample valve. nts used:

ame

Version (386): V513 SW Version (EGA): V321 p and hop mode version(s):

ee

per modes and Sweep m

te: TEGA is checked to see if TEGA is Ifrt self to end activity

1.1.3. TEGA_MAIN3_PWR "ON" 1.1.4. Start the TEGA 386 FSW

Call Sequence 30A

Turn on EGA

4.1.2. Restore the1.3.

EGA Commands:Restore Mode

EC Vent Valve

S

tart Heater Regulation TA Manifo

S

Wamup EGA: CALL tega_ega_emission_warmup

8.1. Calls tega_ega_prep, filament 1- 8.1.1.1.Sets JPlate 0 to -110V

8.1.1.2.Sets Jplate 1 to -92V 8.1.1.3.Start SM 1 pause 1 sec

8.1.1.5.Ion Pump ON Pause 1 sec 8.1.1.

6.Emission ON

7.Pause 2 Minutes 8.Stop SM 1

Emission Current to HIGH – PASS IN PARA

calibration OFFSET

inute

8

Pause 20 minutes

8

Stop SM 3

8.

Pause 1 minute

8

Calls tega_ega_gain8.9.1.1.1. Sta

8.9.1.1.3. Set MV 26008.9.1.1.4. Remain at 3200

8.9.1.1.5. Sto

p and

Call tega_ega_calibration_scans (Set =1, exit = 3200V)

gin background determination

Start SM 5 (Atmosphere HIGH Emission)

P

top SM 5

S

Call tega_ega_calibrations_scans (Set 1, Exit = 3200V)

Start SM 10 (Atmo

Pause 5 minutes (to get residual data on new calibration

t mass 44 on scale.

Open TA sample inlet

Pause 5 minutes Close TA sample inlet

S

top SM 10

S

pen ATM Aker Valve

O

Pause 90 minutes (5400 Secs)

Stop SM 5

C

hange to LOW Emission

C

tart SM 4 (ATM Low emission)

S

top SM 4

S

Call tega_ega_calib

Start SM 4 (ATM, Low emission)

Pause 2 minutes

S

Run Sweep 38 tart SM 4 (ATM, Low Emission)

S

C

lose ATM Valve

C

ause 10 minutes (to watch decay of gas in atmo

P

ush atmosphere from

Set Carrier gas to regulate at 35 mb

Pause 10 minutes (to watch increase in N₂ in TA CML volume)

T

urn Off Heaters: Call tega_disable_heater_control 40.1. Only heaters that will have been regulating are TA Manifold and EGA

Stop regulation of Carrier gas

S

lose Sample

C

Close Bypass

C

5.1. Take a dump to confirm closed

4

urn off EGA: CAL

T

46.1.1.1. EGA Shutdown: 46.1.2. Multiplier Voltage OFF

ait 5 secs

.4. Emission Off

.5. Wait 5 secs .6. Ion Pump Control OFF

.7. Activate Sequence 7A to

TEGA: CALL tega_power_off .1. Turn off the third TEGA switch

47.1.4. FPGA Dump – Aker Valve state