15
piCO
+
Operating Manual
English
●
If, after attempting to calibrate with
20ppm CO gas, the display shows a
, it means that the gas value was not
within the permitted limits. The reading
achieved is displayed underneath the
. If the value is much lower than
20ppm, there may have been a problem
with the supply of gas from the cylinder
during the calibration process. If the
value is much higher than 20ppm, it is
possible that the wrong concentration of
calibration gas is being used. In either
case, check the cylinder, connections
and flow-rate before double clicking
the button to repeat the gas calibration
process. If, after a third repeated attempt
to calibrate the instrument, the display
shows a again, the unit will have
to be reset or restored using the reset
button located in the battery bay. If the
problem persists please return the unit
to Bedfont or your local distributor for
investigation and repair. In this case, the
display shows a telephone and envelope
symbol. The unit can be turned off by
pressing the button for three seconds.
It is then possible to re-start the unit
and use it with the previous calibration
settings, or to attempt the complete
calibration process again.
Troubleshooting
●
If the unit fails to turn on properly, or if
either low battery symbols
or
are showing, replace the 2 × AA batteries.
Ensure that the batteries are inserted
the correct way around, matching the
symbols moulded into the plastic.
●
If a breath test on a non-smoker gives
an indication of CO being present, it may
be because of a high ambient level of
CO (possibly due to a faulty combustion
appliance or exhaust fumes), or due to
the effects of passive smoking. A false
reading can be obtained when there is
alcohol on a person’s breath, or from
the presence of hydrogen, which can be
generated in the human digestive system.
●
If a appears after zeroing, a second
attempt can be made to zero the unit in
fresh air. Check that the unit is in fresh
air and double-click the button to restart
the zero process. If, after a third zeroing
attempt, the display shows a again,
the unit will have to be reset or restored
using the reset button located in the
battery bay. If the problem persists,
please return the piCO
+
to Bedfont or its
distributor for investigation and repair. In
this case, the display shows a telephone
and envelope symbol. The unit can be
turned off by pressing the button for
three seconds. It is then possible to
re-start the unit and attempt the zeroing
process again.
