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Check Fluid Resistivity
Graco Part No. 722886 Resistance Meter and 722860
Probe are available as accessories to check that the resis-
tivity of the fluid being sprayed meets the requirements
of an electrostatic air-assisted spray system.
Follow the instructions included with the meter and
probe. Readings of 25 megohms-cm and above provide
the best electrostatic results.
Check Fluid Viscosity
To check fluid viscosity you will need:
•
a viscosity cup
•
a stopwatch.
1. Completely submerge the viscosity cup in the fluid.
Lift the cup out quickly, starting the stopwatch as
soon as the cup is completely removed.
2. Watch the stream of fluid coming from the bottom
of the cup. As soon as there is a break in the stream,
shut off the stopwatch.
3. Record the fluid type, elapsed time, and size of the
viscosity cup.
4. If the viscosity is too high or too low, contact the
material supplier and adjust as necessary.
WARNING
Fire, Explosion, and Electric Shock
Hazard
Check the fluid resistivity in a non-hazard-
ous area only. Resistance Meter 722886 and
Probe 722860 are not approved for use in a
hazardous area.
Failure to follow this warning could cause
fire, explosion, electric shock and result in
serious injury and property damage.