Standard Pressure Readings - Extech Instruments CO80 Manual

5.1.1.

Standard Pressure Readings

Press "Scroll" to select Display 4. Pressing the "Pressure" button once
automatically calibrates the CO80 to atmospheric pressure.
5.1.1. Standard Pressure Readings (Cont.)
Four bars (----) will initially appear on the display, which will change to 0.00
mbar (or selected pressure scale) once calibrated to atmosphere. The
instrument is now ready to take pressure readings.
For gauge pressure,
connect one length of
silicon tubing supplied
to the 'Pressure (+)'
port (see 2.7).
To record the pressure, press and hold "Clock" -
commence and "P1" is displayed at the bottom of the screen. Press and
hold "Light" until a "beep" is heard and the bottom display alternated
between the "dropped" reading and "P1".
For differential pressure,
connect the two supplied lengths
of silicon tubing to both the
'Pressure (+)' and 'Pressure (-)'
ports. The difference in the
readings is displayed and logged
(if required).
25
a counter will
CO80 V3.1 04/06