Calibration; Co 2 Calibration - Honeywell IAQPoint2 User Manual

IAQPoint2™

Calibration

For the highest possible accuracy when the ABC function is off, the sensor can be
recalibrated by a qualified operator� ABC cannot be disabled on a unit without a
display�
CO Calibration
2
By default, the CO sensor uses an Automatic Baseline Calibration (ABC) algorithm
2
to maintain accuracy� However, ABC is inappropriate for environments with
continuously elevated concentration and should be disabled� With ABC disabled,
the CO sensor can be manually calibrated� The sensor's response coefficient
2
is fixed during manufacture� The baseline calibration affects only the offset, not
the slope of the sensor's response� This calibration can be performed at any CO
concentration level� However, calibration with 1,000 ppm CO
is simplest and is recommended� For non-ABC applications, the unit should be
calibrated in the environment in which it will be used�
The calibration procedure (possible only if ABC is disabled):
1� Enter the level 2 password� By default, this is 2967�
2� Navigate to Calibrate\Calibrate Gas� This screen will flash every second to
indicate calibration mode�
3� A message may be displayed indicating that ABC is enabled and calibration
is not possible� If ABC is not desired, it can be disabled in the Configure\
Configure Outputs\Auto Baseline menu�
4� Connect a cylinder of a test gas of known concentration (e�g� Honeywell
part M-501010, 1,000 ppm CO
M-502585)�
5� Connect the regulator's tube into the calibration port on the side of the
IAQPoint2 monitor�
6� The top line of the display shows the mode of the CO
"normal" and not some other message�
7� The second line of the display shows the current concentration� Verify that this
shows a reasonable number� Since the calibration gas flow has not yet been
started, this should show an ambient CO
than 500 ppm in a room�
8� Open the regulator's valve to start the flow of gas�
9� Wait three minutes for test gas to purge all of the ambient air out of the sensor�
10� Verify that the concentration reading stabilizes to match the cylinder CO
concentration within ±200 ppm�
11� Verify that the "Target" concentration matches the concentration of the cylinder
of test gas� If pure nitrogen is used, this should be zero� If needed, enter the
correct concentration by pressing [Target]�
12� Press [Base Cal Now]�
13� The mode display should show "in base cal" for about ten seconds�
14� Verify that the mode display shows "base cal pass"�
44
) to a 0�5 lpm regulator (e�g� Honeywell part
2
concentration� It is normally greater
2
calibration gas
2
sensor� Verify that this is
2
2
2