10
It is advisable to accept the calibration even though it displays 20
ppm (i.e. the ideal reading). This will reset the
‘calibration due’
timer.
Turn OFF the device if the calibration was incorrectly performed.
Do not press the Select Function key
.
To prevent incorrect calibration, only the readings within the range
of 16-
24 can be calibrated. An ‘Error’ message will be displayed if
the calibration is accepted for readings outside this range.
9. Turn OFF the device; wait for a minute and it is now ready for use.
If the device is not calibrated for six months, the device will beep three
times before the countdown starts and will display the following message:
Calibration Expired
Please Calibrate
the unit
The reading is not
Guaranteed
The message will appear for three seconds and then the device will
operate as normal. Calibration should be performed as soon as possible.
Set Environment Mode
To enter the
‘User Menu’, press the ON/OFF Power key
and the Select
Function Key
simultaneously. Do not release the key until the user
menu appears.
User Menu
Calibrate
E
E
E
n
n
n
v
v
v
i
i
i
r
r
r
o
o
o
n
n
n
m
m
m
e
e
e
n
n
n
t
t
t
M
M
M
o
o
o
d
d
d
e
e
e
Breath Hold Time
Set Light colors
Exit
