Generator/Electricity:

Generator off all night. Crew explored the current required to power various appliances (external water pump, toaster etc). All drew less than 5A. A test was done to see if the water heater could also be run off battery. This was not possible and the battery voltage dropped down to 21.7V and the generator was restarted.

Generator stopped briefly at 12:15 to investigate a small fuel leak noticed at restart this morning. Hose connection to large diesel tank tightened at generator input valve. Leak stopped. Generator restarted successfully.

Discovered an alligator clip from one of the battery chargers had snapped in half during the day. This means that one battery has been losing charge during the day. Replaced at 20:30 with generator off and restarted to recharge this battery. Don also replaced the jumper cable connecting the two batteries with a proper connection cable during the day. Leak has returned, collecting leaked fuel in a separate container. About 400cc leaked during today. Don is aware of this problem.

Will be switched off after dinner. At request of Engineering Support we will only run the generator for 5-6hrs in the afternoon/evening from now on. Tomorrow will test whether this is achievable with our current electricity consumption levels. Expect that this will be no problem.

Will also look at starting/stopping the generator from the inverter control panel if the system is stable tomorrow.

At 20:50: Oil Pressure: 39
Oil Level: Full
Generator battery voltage: High in 'yellow' range
Time: Hab Battery Voltage: Load Current: Generator on
23:20 26.7V not measured Yes (just before shutoff)
23:35 24.2V not measured No (just after shutoff)
08:25 23.0V 10A (with toaster on) No
09:00 23.1V 5A No
11:30 22.7V 8A (ext water pump) No
18:45 26.6V 6A Yes

Fuel Status:
Fuel status no change from yesterdays report.
Generator Aux fuel tank: three quarters full
Propane tank: 46%
Will not attempt to use separate diesel containers as yet.

Water Status:
Internal tank: At 08:30 tank held 27 gal.
At 11:30 refilled from 23-55.
At 17:50 refilled from 38-50.
Total water used = 21gal

Water meter change: 2137.0 (08:30) to 2157.0 (17:50).
Total water used = 20gal

External water tank: Since trailer on which tank is standing is on an angle, depends which side of tank you measure from. This explains error in Day 2 measurements which were performed by another crew member from the other side of the tank. Currently at 19inches deep from deeper side of tank.
Flushes: 8
Showers: 4

Transportation:
ATVs: All three ATVs used for first EVA today. ATV #2 and #3 used for second EVA. No maintenance required. Small portable compressor located and added to box on ATV #2 as the rear left tire continues to be a little soft.

ATV fuel levels:

ATV #1: half full

ATV #2: three quarters full

ATV #3: half full

Pressurized Rover: The Blue truck has slightly less than half a tank of fuel, and seems to use it fast from observations made while jump-starting the generator in the last few days. If we wish to take it on long-distance EVAs like the previous crew did can we use the ATV fuel in the Blue Truck if we run low? Please advise. We checked the oil level of the truck also. This is well and truly full. Attempted to check the coolant, as previous crew indicated overheating was a significant problem. How full should the radiator be? And is it ok that there is a plastic bag taped over the top of the radiator overflow tank?

Mars Suits:
MDRS suits used by 5 crew members today. PLSS #5 still not working, to be investigated. Repair to PLSS #4 switch successfully tested on EVA.

• One helmet faceplate severely damaged when an octopus strap snapped and the hook hit the faceplate. Large 2 inch (5cm) hole caused. Astronaut has small scratch on forehead but otherwise ok. Thank goodness for the helmet! Faceplate will be replaced with a spare located in EVA prep room. See image sent through to Engineering Support for details of damage.
• One water bag connection gasket broken. Replaced.
• Faulty PPT button reported yesterday is behaving itself today. Seems to be an intermittent fault which I now cannot replicate, though 2 crew have observed this problem. Have marked this helmet to be used only when others not available.

HVAC: Heating not required in last 24hrs.

Computers & Network: Operational.

GreenHab:
Images of each tank sent through with other image upload, in folder 'GreenHab'. TFT moved to Tank #4 again as pump hose is too short to reach low water level in Tank #5.

• Tank #1: Full
• Tank #2: Full
• Tank #3: Full, but not flowing through to Tank #4
• Tank #4: Full, but not flowing through to Tank #5
• Tank #5: Half Full. We have just discovered that this tank is twice as deep as we thought. So Day 1 and 2 reports noting tank was almost empty, the tank was just over half full.

Please advise if is ok to still have the TFT pump in Tank #4.

Miscellaneous: None.