Bacharach PCA 3 Manual De Propietario
PCA
3 Manual
70
0024-9472 Rev 2
6.7.2. Procedure
1. If not already done, turn ON the analyzer and display the
CALIBRATION LIST screen (refer to Calibration on page 62).
2. Use the
▲▼ buttons to highlight CO-LO, and then press ENT to display
the CALIBRATE CO screen.
NOTE: “Measured” is the current CO reading, while
“Applied” is a known CO level that will be applied for
calibration purposes.
“Applied” is a known CO level that will be applied for
calibration purposes.
3. Attach a 500
ppm CO cylinder to the regulator of the calibration fixture
shown in Figure 6-12 on page 76.
4. Use the
▲▼ and ◄► buttons to enter an applied value that exactly
equals the concentration stamped on the CO cylinder.
NOTE: The calibration range is from 9 to 1,500
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.
message “Applied Value High” (or Low) to appear at the
bottom of the screen.
Figure 6-7. CO
LOW
Sensor Calibration
5. Adjust the regulator for a flow meter indication of approximately 2
SCFH.
Wait until the measured reading stabilizes (approximately 3
minutes),
and then press ENT to calibrate the CO Measured value to that of the
applied value. The message “Good Calibration” should briefly appear
followed by the TEST GAS CO/H
applied value. The message “Good Calibration” should briefly appear
followed by the TEST GAS CO/H
2
screen.
NOTE: 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.
the message “Good Calibration WARNING Low Sensor”
will appear. The sensor will now be marked as being Low
in the DIAGNOSTICS screen.