Specifications

Calibration and Maintenance Monoxor



Plus Manual

46 0019-9370 Rev 0

Step Manual CO Zero Procedure

4 From the CO Zero Setting screen, use the DOWN () arrow button to select

the Manual Zero option then press ENTER. A reminder screen to place the

instrument in fresh air is displayed.

5 Press ENTER and wait for the manual zero to complete.

5.6.3. CO Sensor Span Procedure

Step CO Span Procedure

1 From the Calibration Menu (see page 27), use the UP () and DOWN ()

arrow buttons to highlight CO, and then press ENTER to display the

CALIBRATE CO screen. This requires password validation (see page 27).

“Measured” is the current CO reading, while “Applied” is a known CO level

that will be applied for calibration purposes.

2 Use the UP (), DOWN (), LEFT (), and RIGHT () arrow buttons to enter

an Applied value that exactly equals the concentration stamped on the CO

cylinder.

NOTE: Bacharach recommends using a 500 ppm calibration gas,

however the calibration range is from 20 to 1,000 ppm. An attempt

to calibrate outside this range will cause the message “Applied

Value High” (or Low) to appear at the bottom of the screen.

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