AQ COMFORT Instruction & Operations Manual
Version 1.01
Page 25 of 44
Press the
OK
key to execute a zero cycle of all the gas sensors. This procedure should
last 60 seconds.
At the end of the zero period, the AQ Comfort reads the output of all gas sensors and
sets them all to zero.
If no error messages appear at the end of the countdown, proceed with your
measurements.
ZERO CO
2
: This will set the zero point of CO
2
.
You must use cylinder of ZERO AIR
for CO
2
ZERO CALIBRATION
. Connect Cylinder to the “A” inlet connection on the
bottom of the AQ Comfort using the optional accessories included in the CALIBATION
KIT (Part #: AQCAL). See CALIBRATION APPARATUS section below for how to
connect.
Scroll down using down arrow key and have the cursor (reverse color) point to
the line
Zero CO2 Sensors
Press the
OK
key to execute a zero cycle of the CO
2
Sensor. The monitor will count
down from the Zero Time setting as explained above. The recommended Zero Time for
the CO2 sensor is 60 seconds.
If no error messages appear at the end of the countdown, proceed with your
measurements.
2. ZEROing Sensors using OUTDOOR FRESH AIR (with the exception of CO
2
)
If you are
not
using bottled ZERO AIR, it is important to select a location where the
ambient environment of the monitor is clean from traces of carbon monoxide or other
toxic gases. The user should be at least 20-30 feet (6-10 meters) away from any
buildings, parking lots, highways, and any other possible exhaust sources. If in doubt of
the ambient air, please use the ZERO AIR cylinder.
When you turn the instrument on in clean ambient air, wait at least one (1) minute to
allow the monitor to warm up before carrying out the zero calibration.
ZERO GAS SENSORS
: This will set the zero point of CO, Pressure and Velocity
values based on the clean ambient conditions.
Have the cursor (reverse color) point to the line:
Zero Gas Sensors
