Product Overview

Table Of Contents
FlexStat (General) 27 Application Guide, Rev S
or buycalgas.com) for aaching a regulator and tube to a cylinder of
reference gas.
2. On the FlexStat, turn the hex screws in the boom and top clockwise
until they clear the cover.
3. Carefully pull the FlexStat cover away from the backplate (mounting
base).
4. Aach the adapter plate (with aached power cable) for the BAC-
13xxxx/14xxxx FlexStat from the HTO-1103 (or HTO-1104) FlexStat
Firmware Upgrade Kit to the back of the cover. (See the HTO-1103
Installation Guide for more information.)
5. Remove the protective rubber cap from the power adaptor cable’s two
pins and insert the pins into the 24 VAC power section (Com and ~ on
lower right) of the wall-mounted terminal blocks. (Keep the cap on the
pins when not in use.) Allow the unit to warm up for several minutes
before proceeding.
6. Remove the protective caps from both of the calibration tube ings
on the back of the FlexStat board.
NOTE: Although the caps are not required for maintaining the accu-
racy of the sensor, they protect against insects, dust, or other
contaminants from geing inside the tubes. If a cap is lost, the
sensor will still function normally, but the cap should still be
replaced as soon as is feasible.
7. Connect the tubing from the reference gas cylinder to either of the
FlexStat calibration tube ings using the 3.5"-long adapter tubing
(201-403-03) from the HTO-1103 FlexStat Firmware Flash Upgrade
Kit. One end of the adapter tubing ts over one of the FlexStat cali-
bration tube ings. The other end ts inside the standard 1/4” OD
tubing that comes from the regulator.
NOTE: It may be easier to aach the adapter tubing to the ing be-
fore aaching the backplate to the FlexStat.
NOTE: The programming pod and USB cable in the HTO-1103 kit are
not used during CO
2
calibration. The BAC-13xxxx/14xxxx back-
plate adapter in the kit is used for both CO
2
calibration and
rmware upgrades for those models.
8. From the FlexStat’s Main Menu, select the Advanced > CO
2
Sensor >
Calibration menu.
9. Enter the elevation and ppm of the reference gas used. (Elevation for
any particular location can be found at such sources as www.earth-
tools.org.)
10. Open the cylinder’s regulator to allow 7 psi of gas through the sen-
sor.
11. Change Mode from Monitor to Calibrate and press the Enter buon.
The Calibration Time will begin counting at the boom of the screen.
NOTE: After initiating, the calibration process takes approximately 4
minutes and cannot be stopped by any buon presses until the
cycle is complete. If power is removed before the calibration
process is completed, the old values will be retained.
NOTE: No maer what the normal inactivity time-out seing is (in
Advanced > User Interface menu), time-out for the calibration
screen is 10 minutes.
12. After the calibration process is complete, Mode will change from
Calibrate to Monitor. Press the Left buon and information about the
most recent calibration (date, elevation, and ppm of reference gas)
will be displayed in the lower part of the screen.
13. Turn o the gas, remove the connected tubing, and reinstall the
protective caps in the calibration tubes.
14. Carefully remove the adapter plate and power cable and reinstall
the FlexStat on its backplate while being careful not to pinch or
dislodge any wiring.
15. Back the hex screws (counterclockwise) out of the brackets until they
engage the FlexStat cover and hold it in place.