CO-Guard Calibration
1. Press and hold the MENU button until EXIT is displayed
2. Press the MENU button once so that ZERO will be displayed
3. Apply 20.9% oxygen cylinder until the balloon is 2-3 inches in
diameter
4. Press the SELECT button. The display will flash between ZERO and
PV
5. Wait for PV number to stabilize the press SELECT
a. If BAD SPAN displays on screen, press SELECT twice to retry
span or follow notes at the bottom of the page label Factory
Calibration
b. If CAL OK or SPAN display continue to 6
6. Remove 20.9% oxygen cylinder and install 20PPM gas until the
balloon is 2-3 inches in diameter
7. Press SELECT button once. The CAL 20 and PV will begin flashing
8. Wait for PV number to stabilize the press SELECT
a. If BAD SPAN displays on screen, press SELECT twice to retry
span or follow notes at the bottom of the page label Factory
Calibration
b. If CAL OK display continue to 9
9. Press MENU button until EXIT is displayed then press the SELECT
button. Note: Reintroduce clean air to the sensor before
pressing the SELECT button. 20PPM gas will be in sensor and
will cause the system to alarm
Factory Calibration
1. If a new sensor assembly has been installed, a factory calibration
must be performed. It is suggested to allow the sensor to stabilize for
3 – 4 hours
2. Press and hold the MENU button for 2-4 seconds while viewing the
ZERO in step 2 above. F will appear indicating the instrument is in
factory mode
3. Perform the calibration ZERO and Span procedures as shown above