11
piCO
+
Operating Manual
English
3
2
4
1
●
Ensure that the instrument is surrounded
by fresh air. With the pointer now
opposite the ‘zeroing’ symbol, double
click the button to set the instrument
to zero. If the zeroing has been
successful, a tick
will be displayed.
If the zeroing fails, a
will be displayed
(see Troubleshooting –
page 15). Double click
the button to return to the
calibration menu.
1.5 l/m
1.0 l/m
0.5 l/m
1
2
Calibration
●
Instruments are calibrated before leaving
Bedfont.
●
Calibration reminders
will prompt the user to
calibrate the unit every six
months
●
The calibration gas
required is Bedfont 20ppm carbon
monoxide in air.
●
Ensure the fine control valve is in the ‘off’
position.
●
Screw the fine control valve and flow
indicator assembly to the gas can. This
is best done by screwing the gas can
into the valve.
●
Turn the instrument on in
the normal way. When the
main menu appears, scroll
down to the symbol of the
gas cylinder with a single
click of the button. Double
click the button to select
the symbol.
Bedfont Calibration Kit
1. Fine control valve
2. Flow indicator
3. Gas cylinder, 20ppm CO
in air
4. Calibration adapter and
tube
