Hach EZ Series Basic User Manual page 19

If the analyzer uses flammable reagents, make sure to obey the safety precautions that follow:
• Do not plumb the drain line to a floor drain.
• Dispose of waste in accordance with local, state and national environmental regulations.
5.4.3 Vent line guidelines
Fire hazard. The user is responsible to make sure that sufficient precautions are taken when the
equipment is used with methods that use flammable liquids. Make sure to obey correct user
precautions and safety protocols. This includes, but is not limited to, spill and leak controls, proper
ventilation, no unattended use, and that the instrument is never left unattended while power is
applied.
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
Do not connect the vent line (exhaust gas port) to other lines because backpressure or damage to the analyzer
can occur. Make sure that the vent line is open to air at the building exterior.
To prevent backpressure and damage to the analyzer, make sure that the analyzer is higher than the facility
vent(s) used and that the vent line has a constant downward slope. Install the vent line with a 2.54 cm (1 inch) or
more vertical decrease for each 0.3 m (1 ft) length of tubing.
The analyzer uses the vent line to release exhaust gases during analysis. Correct installation of the
vent line is important to make sure that all of the gas is removed from the analyzer. Incorrect
installation can cause gas to go back into the analyzer and cause damage. The recommended
external diameter for the header tube of the vent line is 32 mm.
• Make the vent line as short as possible.
• Make sure that the vent line has a constant slope down.
• Make sure that the vent line does not have a sharp bend and is not pinched.
• Make sure that the vent line is closed to the ambient of the installation room and is at zero
pressure.
• Do not block or submerge the vent line.
If the analyzer uses flammable reagents, make sure to obey the safety precautions that follow:
• Do not plumb the vent line to a floor drain.
• Dispose of waste in accordance with local, state and national environmental regulations.
If the analyzer uses ozone, make sure to obey the safety precautions that follow:
• Make sure to plumb the exhaust gas port to the building exterior in accordance with local, regional
and national requirements.
5.4.4 Plumb the analyzer
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
Reagents, standards and cleaning solutions are supplied by the user. The tubing is factory installed.
Read the label on each tube to identify the correct plumbing connection. Do the steps that follow to
install all of the necessary fluid connections.
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