FIELD TROUBLESHOOTING
The Stingray uses an ultrasonic level sensor to determine water LEVEL and an ultrasonic Doppler
sensor to measure flow VELOCITY.
The QZ02L transducer combines both sensors in one housing.
SYMPTOMS
FAULTS SOLUTIONS
Pressing display button
does not turn on LCD
display
Batteries not installed properly Check battery polarity
Battery latch not fully closed Slide latch to the fully closed
position
Batteries dead Replace batteries with 4 premium
quality Alkaline D-Cell
Operating below minimum
temperature
Rated for operation above -4°F /
-20°C
New batteries just installed Allow 10 seconds for Stingray to
activate after installation of new
batteries
Level reading zero with
level >1” / 25.4 mm
Sensor not connected Connect sensor
No echo detected Sensor misaligned. Use a level to
confirm sensor mounting is
horizontal
Sensor coated with debris or
sediment
Clean sensor with a soft brush
Level reading correct but
not changing
Batteries discharged Replace batteries with 4 premium
quality Alkaline D-Cell
Sample rate Stingray LCD display and
Greyline Logger real-time display
are refreshed every 10 seconds.
Level reading not correct
and not changing
Extreme turbulence Relocate sensor where water
surface is calm and evenly
distributed
Debris attached to sensor or
mounting structure
Clean sensor with a soft brush and
remove debris
Level reading is erratic Extreme turbulence and highly
aerated water
Relocate sensor where water
surface is calm and evenly
distributed
Sensor coated with debris or
sediment
Clean sensor with a soft brush
Stingray Level-Velocity Logger
Manual Series A.3
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