Specifications

PCA
®
3
83
If the sensor’s output is low, but still usable, then the
message “Good Calibration WARNING Low Sensor” will
appear. The sensor will now be marked as being Low in the
DIAGNOSTICS screen.
If the sensor’s output is too low to be usable, then the
message “Bad Calibration Sensor End of Life, Entry Not
Saved” will appear followed by the CALIBRATION LIST
screen being re-displayed. The sensor will now be marked
as being BAD in the DIAGNOSTICS screen.
6. Turn OFF regulator and remove gas cylinder.
5.11 CO
High
Sensor Calibration
This procedure spans the optional carbon monoxide high sensor (4,001 to
20,000 ppm) to a known gas level.
Material Required:
• Calibration Kit, P/N 0024-7059
• Gas Cylinder: 4,000 ppm CO in Air, P/N 0024-1155
Procedure:
1. If not already done, turn ON
the analyzer and display the
CALIBRATION LIST screen per
Section 5.2.
2. Use the ▲▼ buttons to highlight
CO
High
, and then press ENT to display
the CALIBRATE CO
High
screen.
“Measured” is the current CO reading,
while “Applied” is a known CO level
that will be applied for calibration
purposes.
3. Attach a 4,000 ppm CO cylinder to
the regulator of the calibration fi xture
shown in Figure 5-2 on Page 85.
4. Use the ▲▼ and ◄► buttons to enter
an Applied value that exactly equals
the concentration on the CO cylinder.
The calibration range is from 250 to
11,000 ppm. An attempt to calibrate outside this range will
cause the message “Bad Calibration Wrong CAL Entry” to
appear in the following step.