Section 9. Maintenance
Replacing the intake filter
The air intake filter should be replaced approximately once every two or three
months, typically. In some conditions, the filter will not need to be replaced as
often. In dusty conditions, it may need to be replaced more often.
Low flow rate or high drive voltage may indicate the filter is due for replacement.
You can replace the filter and filter O-ring with new ones from the spares kit. This
procedure describes how to replace the filter.
Description Part Number
Filter Replacement Kit 9971-015
Filter Pack (5) 6571-002
O-ring Pack (5) 192-19986
Table 9-1. The filter replacement kit includes five filters and O-rings.
Caution: Do not use a pliers or other metal tools on the air intake! Doing so may
deform the parts or alter the alignment of transducers. Instead, use the plastic air
intake tool that is included in the spares kit (part number 6371-021).
The intake filter is on the bottom of the lower transducer housing.
1
Power off the LI-710 - disconnect the cable.
2
Align the intake removal tool with the keys on the air intake and turn it counterclockwise.
Caution: Do not apply torque to the transducer housings. Doing so can affect the
alignment and damage the sensor.
Once it is loosened, you can remove the air intake with your fingers. Be sure that
both the filter and O-ring come out when the intake is removed.
9-2 LI-710 Evapotranspiration Sensor Instruction Manual
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