TSI Instruments ALNOR LOFLO BALOMETER Series, Owner'S Manual

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8
SECTION 8
Troubleshooting
Symptom Possible Cause and Corrective Action
Meter does not turn on.

Battery holder snap connector not connected.
Connect battery holder to instrument.

Batteries may be discharged. Charge or replace
them.

Switch failure, wiring failure, or circuit failure. Call
TSI.
Meter reading lower than expected.

Wrong vent mode chosen. Choose correct vent
mode, open or closed.

Wrong air direction mode chosen. Choose
correct direction, supply or return.

Back pressure effects could be significant. Use 2-
point measurement mode.

Hood frame not sealing properly around diffuser
or grill. Press hood evenly against diffuser.

Odd air flow pattern present. Perform traverse
and use proportional balancing.

Hood torn. Replace, or repair tear with duct tape
or other non-porous material.

Meter out of calibration. Call TSI.

Damage to manifold. Call TSI.
Meter reading higher than expected.

Wrong vent mode chosen. Choose correct vent
mode, open or closed.

Wrong air direction mode chosen. Choose
correct direction, supply or return.

Odd air flow pattern present. Perform traverse
and use proportional balancing.

Meter out of calibration. Call TSI.
Meter not at zero at zero flow.

Instrument not at room temperature. Allow
instrument to acclimate before turning on the
power.

The LoFlo Balometer
®
Capture Hood is reading
real room air currents. Place on floor with a piece
of cardboard over the top to determine if it is
measuring real air currents.

Meter out of calibration. Call TSI.
Meter displays Er.

Self test failed. Call TSI.
Handle button not working.

Call TSI.