Micro Direct CO Check Pro Operating Manual page 10

1. Connect the short plastic tubing connected to the regulator
(#MC22) to the reducing connector found in the carry case
(#MEC1007).
2. Connect the regulator to the 20-ppm calibration gas cylinder
(#MC10) as shown in the diagram on the device page
3. To enter the User Menu, press the ON/OFF Power key
Select Function Key
until the user menu appears.
4. Calibrate is already highlighted. Press and hold the Select
Function Key
5. The device will countdown from 15 to 0 and then will display the
calibration icon.
6. Attach the reducing connector to the CO Check Pro and turn the
regulator knob fully counter-clockwise until knob will not turn any
further. This will supply gas to the CO Check Pro at approximately
0.25 L/min.
7. Apply this flow for approximately 20 seconds until the device
beeps then turn the regulator clockwise to shut off the flow of gas.
The device will display the gas concentration reading.
If the reading is not 20 ppm, press the Select Function key
8.
at least 3 seconds to accept the new calibration value. The device
will say 'done' and then will show 20 ppm.
simultaneously. Do not release the key
User Menu
C a l i b r a t e
C a l i b r a t
C a l i b r a t
Environment Mode
Breath Hold Time
Set Light colors
Exit
for at least 3 seconds to confirm the selection.
9
e
e
and the
for