Maintenance - Triplett AM250 User Manual

Maintenance

Battery Replacement
The AM250 has a low battery indicator (battery symbol). Important: Turn the meter off before
opening the battery compartment. Using a coin, turn the battery compartment cover CLOCKWISE
to remove it. Once opened, observe the position of the battery, placing the new one in the same
position. Secure the battery compartment cover and dispose of the lithium battery in accordance
with local, state, or national disposal codes.
All EU users are legally bound by the Battery Ordinance to return all used
batteries to community collection points or wherever batteries / accumulators
are sold.
Disposal in household trash or refuse is prohibited.
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at
the end of its lifecycle
Other Battery Safety Reminders
Never dispose of batteries in a fire. Batteries may explode or leak.
Never mix battery types. Always install new batteries of the same type.
Impeller Replacement
Remove the set screw next to the impeller assembly (on the rear of the meter). Twist the impeller
assembly counter-clockwise to the OPEN position and remove
it.
Install impeller by inserting & twisting the new impeller assembly clockwise Tighten
the set screw.
CFM Measurements
Measure the area of the duct using the diagrams below for rectangular and circular ducts (If the
duct measurements are made in inches, divide the inches by 144 to get the area in square feet).
Plug the area value (in square feet) in the cubic equations below. Note that the air velocity must be
plugged into the cubic equations also.
3
CFM (ft /min) = Air Velocity (ft/min) x Area (ft
3
CMM (m /min) = Air Velocity (m/sec) x Area (m
2
)
2
) x 60