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All FAQs (1717 total: showing 921-940)

Would there be any issues with installing 900 MHz wireless devices at stations that use 900 MHz radios for communication? Would this cause too much noise interference?
What should be done if the content of a water source to be sampled is unknown?
To determine how much tubing is needed to cover the distance from a water sampler to the water source, how is slope length calculated?
In water sampling, when are sinkers or strainers used?
How long can a water sample be held before it is analyzed?
What are the special needs for water samples with metals or petrochemicals?
Do oil and grease coat water sampling equipment and contaminate subsequent samples?
Should glass or plastic water sample containers be used?
What is the standard refrigerator temperature for a stationary water sampler?
Does ice have to be used with a portable water sampler?
How easy is it to program a water sampler?
What is the proper way to replace the internal battery of a water sampler?
What might indicate that the internal battery of a water sampler is failing?
Does the internal battery in a water sampler controller ever need to be replaced?
If an external battery is replaced on an automatic water sampler, will the sampling program automatically resume?
Does replacing an external battery cause the water sampler program memory to be deleted?
How can the external battery voltage of the water sampler be checked?
If no ac power source is available, can just one external battery power a water sampler?
To run a water sampler, does a backup battery need to be used with an ac power source?
Should an ac power supply or a battery be used with a water sampler?

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