AQ COMFORT Instruction & Operations Manual
Version 1.01
Page 24 of 44
ZERO TIME
: This is the countdown time for the zero procedure. The zero cycle time
should set at 20-60 seconds.
SPAN TIME
: When carrying out a span calibration, you must introduce the span gas for
an appropriate amount of time before the monitor executes the span calibration. This
setting, which is the same for all sensors, controls this time interval. The span time is
indicated in seconds.
SPAN LOCKOUT
: This controls access to the remaining span calibration menu
options. Span lockout prevents accidental or mistaken calibrations. Span lockout is
enabled and disabled by entering a 4-digit code. See section D below for the code.
SENSOR HISTORY
: The date that each sensor was installed is displayed, along with
the date the sensor was last calibrated and the span gas concentration used.
SPAN XXXX
: The remaining lines of the CALIBRATION MENU are used for carrying
out span calibrations of the CO and CO
2
sensors. For detailed use of these settings,
please refer below.
A. ZEROING THE AQ COMFORT
Select
CALIB
key to go into Calibration Mode
There are two (2) methods to Field-Calibrate the GAS & CO
2
Sensors on the AQ
Comfort.
1. ZERO Gas Sensors using the ZERO AIR Cylinder (to zero all gas sensors)
2. Using Outside fresh Air to Calibrate the gas sensors (except the CO
2
sensor)
1. ZEROing ALL GAS Sensors using a certified Cylinder of ZERO AIR
If you have a gas cylinder/bottle of ZERO AIR you can use this for Zeroing ALL of the
gas sensors in the AQ Comfort. If you do not have this cylinder, please contact
E Instruments to purchase our optional Calibration Kit consisting of ZERO AIR &
regulator for proper calibration of the AQ Comfort (part #: AQCAL).
ZERO GAS SENSORS
: This will set the zero point of the CO value. 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.
Have the cursor (reverse color) point to the line:
Zero Gas Sensors
