Okolab LEO - Troubleshooting

90
20 Troubleshooting
The table below shows some frequently asked questions. Please contact Okolab if you need assistance.
Effect
Main Causes
Secondary Causes
Solution
Auto measurement
terms for time-out.
Gas flow rate sent to
LEO is lower than
values suggested in
this manual.
Sent to LEO a gas flow rate higher than 60
ml/min in diffusion mode or 130 ml/min in
Aspiration Mode.
Data download does
not start.
USB key is not
correctly formatted.
Make sure that USB flash drive is FAT32
formatted.
USB key is damaged.
Use a new USB key
The touch screen
does not respond
properly, or not at all.
The display is not
calibrated.
Press and hold the power button for more than
5 seconds to calibrate the touch screen.
The device does not
log data in internal
memory.
Internal memory is
full (A warning icon
appears on the
Homepage.)
Erase all memory data; save data before erasing.
Humidity Alarm
Possible Moisture
Trap absence or
wrong connections
Please verify that Moisture Trap is properly
connected.
High O2 level and low
CO2 level in
measurement
Possible air
infiltration
Wrong Connections
Verify that all the connectors are correctly
plugged on LEO and (eventually) on Moisture
Trap
Verify that Tube B is properly connected on
incubator, eventually using fittings provided in
the Hard case
Pump Leakage
Use and external mass flow meter on the output
line of LEO, in order to verify if the Pump flow
rate chose is correctly elaborated.
Leakage test is required and possibly a Pump
substitution.
Sensing Cell out of
calibration
Wrong offset CO2 and
O2 value due to a
possible incorrect
user calibration
procedure
Please restore Factory Calibration
CO2 drift due to long
term of LEO usage
Please proceed with CO2 Zero Reset and Span
Calibration
Pump stops working
Possible hydrophobic
filter occlusion
Please verify that filter and inlet/outlet lines are
clean
Possible Inlet/Outlet
occlusion