Panasonic PT-DZ12000U Operating Instructions Manual page 149

C. Generators
Generators can be an effective way of powering portable or
temporary air sampling equipment.
Use the following table and equation to determine your
generator capacity requirements and time between refueling
of your generator fuel tank.
Example: You have a vacuum pump that uses 750 watts per
hour. Your want to continuously operate your vacuum pump
for 8 hours. You need a generator with more than 750 watts
generating capacity and the watt-hrs you need from your
generator is 750 watts times 8 hours (6,000 watt-hrs).
Typical gasoline generators will deliver about 3,000 watt-
hrs per gallon of fuel. If you choose a gasoline generator with
a capacity of 1,000 watts or more your generator would use
about 2 gallons of fuel to operate your vacuum pump for 8
hours continuously.
Typical diesel generators will deliver about 10,000 watt-hrs
per gallon of fuel. If you choose a diesel generator with a
capacity of 1,000 watts or more your generator would use
less than 1 gallon of fuel to operate your vacuum pump for 8
hours continuously.
Gasoline powered generators are readily available with
capacities from less than 1,000 watts up to 10,000 watts.
Diesel powered generators are readily available with
capacities from about 5,000 watts up to 20,000 watts. Diesel
generators tend to be heavier and more expensive than the
gasoline equivalent.
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