19
Chapter 5
Troubleshooting
Table 5-1 lists the symptoms, possible causes, and recommended solutions
for common problems encountered with the V
ELOCI
C
ALC
Plus. If your
symptom is not listed, or if none of the solutions solves your problem, please
contact TSI.
Table 5-1: Troubleshooting the V
ELOCI
C
ALC
Plus
Symptom
Possible Causes
Corrective Action
No display
Unit not switched on
Switch the unit on
Low or dead batteries
Replace the batteries or
plug in the AC adapter
Dirty battery contacts
Clean the battery contacts
Display reads “LO” Low battery charge
Replace or recharge
batteries
Wrong AC adapter
Replace with the correct
AC adapter
Low AC line voltage
Correct the AC line
voltage or use batteries
Dirty battery contacts
Clean the battery contacts
Display reads
“CAL”
The V
ELOCI
C
ALC
Plus
has detected an internal
fault
Return to factory for
service
Display reads
“OVER”
The velocity, pressure or
temperature is too high
Use an alternate method
Sensible heat factor is
less than -1.5 or greater
than +1.5
Take heat flow data again
Velocity reading
fluctuates badly
The flow is fluctuating
Reposition the probe in a
less turbulent section of
the flow or use a longer
time constant
Display reads
“Err 6”
Low lithium battery
Return to TSI for
replacement.
Display reads
“Err 5”
Datalogging RAM is
inoperable
Return to TSI for service
“nO rEF” is
displayed
Not enough data has been
taken to calculate heat
flow
section of Chapter 3 to
see what data is required
