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Log Book for January 22, 2007
Engineering Report
Brogan Hetrick Reporting

Generator/Electricity:

Casper: not used
Wendy Hobbs Meter: 2140.6 hrs (+12.3 hrs since yesterday)
Voltage: 140 VAC
Frequency: 60 Hz
Oil Level: 7/8
Oil Pressure: 40 PSI
Water Drained: no
Notes/Comments: The Generator was run from 2330, 21 January, until 0830, 22 January, to recover from the loss of power. From 0830 until 1330 the generator was secured, and battery discharge rates monitored. From 1330 until 1500 the generator was run to recharge the batteries, but was secured at 1500, because the crew left on an EVA, and we wanted to conserve fuel. At 1800, the generator was restarted to charge the batteries. Wendy's output voltage at the generator reads approximately 140 VAC. At the Inverter it reads approximately 113 VAC. This difference could be due to resistance in the cabling from the generator to the hab. It might also be due to inaccuracies in the meter located at the generator. This is how it has read since Exgamma has been on station. Yesterday's log reported the value from the inverter.

Xantrex Inverter/Dynasty Batteries:

Time - Voltage (Temp Comp) - Load - Temp - Generator Running
18:00 - 21.1 - -9 - 05 - No
Notes/Comments: When Wendy was started following the loss of power to the hab, the frequency failed to indicate and had no control. Wendy was secured and restarted and frequency control was regained. I believe the frequency regulator failed to start during the first attempt to start Wendy, but picked up on the second attempt. Comp Voltage at the 1800 reading is below the 22 Volt minimum. Wendy was started right after the reading was taken. Comp Volts jumped to 26.1 once the battery commenced charging. Load after Wendy start-up was 14.

Fuel Status (as of 18:10):

Diesel: Approximate Reading: 5/8
Notes/Comments: Slightly less then yesterday, but still above 1/2.
Propane Tank: Approximate Reading: 27% (270 gallons = 1022.1 L)
Notes/Comments: The gas water heater switch was left on for about 2 hours when not needed. We have discussed the need to turn off the water heater switches when not in use.
Gasoline Quantity Remaining: 83 gallons = 314.2 L (no change since yesterday)

Oil Status:

GenSet Quantity: 3 quarts (no change since yesterday)
ATV Quantity: 4 quarts (-3 quarts since yesterday)
V'ger Quantity: 3 quarts (no change since yesterday)

Water Status:

Outside Potable Water Tank Level: 300 gallons = 1135.6 L
Trailer Potable Water Tank Level: 49.5 cm from the base
Potable Water Meter Reading: 17647.1 gallons = 66801.3 L (+95.4 gallons since yesterday)
Out to Toilet Meter Reading: 5953.8 gallons = 22537.5 L (+19 gallons since yesterday)
In to GreenHab Meter Reading: 7257.4 gallons = 27472.2 L (no change since yesterday)
Flushes: 22
Showers: 2
Sponge Baths: 0
Notes/Comments: Flushes include all flushes, including liquid waste flushes. The trailer water tank level was measured in inches, and then converted to centimeters.

GreenHab:

Status: We added water to RFT2 from the gray water tank. We were unable to add enough water to restore water flow in RFT2. It is our intention to increase the number of crew showers to increase the amount of gray water to aid in Green Hab operations.
Crops Watered: yes
Crop Condition: RFT2 dose not have enough water to operate. We are working on increasing our gray water output, so we can fill RFT2.

Transportation:

V'ger Used: no
Oil Checked: no
Tire Status: good
Odometer: NaN miles

Kawasaki ATV-1 Used: no
Oil Checked: no
Tire Status: good

Kawasaki ATV-2 Used: no
Oil Checked: no
Tire Status: good

Kawasaki ATV-3 Used: no
Oil Checked: no
Tire Status: good

Notes/Comments: Nothing further to report.

Miscellaneous Infrastructure:

HVAC: After power was restored to the Hab last night, heating control was not restored. After troubleshooting, it was found the there was no 12VDC power to the heating control unit or the toilet flush system. The engineering team continued to troubleshoot the problem, but was unable to determine a cause for the loss of 12VDC power. Sometime in the early this morning 12VDC power returned. We have been unable to determine the cause of the loss or its subsequent return.

Mars Surface Suits: Suits 1, 3, 4, 6 were used this morning for a 2 hour science EVA. Suit 5 is missing its ampthenol cable to charge the fan batteries. We are currently sharing cables from the other suits. Suit 2 has a problem with radio transmissions. The engineering team will troubleshoot this problem tomorrow.

Computers/Networking Infrastructure: Nothing further to report.

Appliances: Nothing further to report.

Data Logger: Nothing further to report.

Upgrade Work: Insulation was added to the sink drain pipping from the hab to the gray water tank. We also propped the pipping up with some rocks to remove a dip in the pipes, to ensure complete drainage of the pipping. The pipes have thawed and all sinks are draining normally.

Notes/Comments: After the loss of power last night, we have been monitoring all power operations closely. We will continue to do so, to ensure no more power related issues. The engineering team has begun working on a program to optimize the usage off all power supply equipment and minimize power usage.

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