Chapter 4
14
Symptom Possible
Causes
Corrective Actions
Display reads
“
LO
” and the
BAT
indicator is
on
Batteries are
low
Replace the
batteries
Dirty
battery
contacts
Clean the battery
contacts
Velocity reading
fluctuates badly
The flow is
fluctuating
Reposition the
probe in a less
turbulent section of
the flow or set the
RESPONSE
switch to
SLOW
Velocity reading
blinks 4000
ft/min or 20.32
m/s
The velocity
exceeds 4000
ft/min or
20.32 m/s
Use an alternate
method to measure
the velocity
Sensor
may
be damaged
Contact TSI
Display
indicates over 10
ft/min (0.05 m/s)
with probe
retracted
Sensor may
be damaged
Contact TSI
