Bacharach PCA 2 24-9448, Operating & Maintenance Instructions

Page: 79 / 108

Instruction 24-9448 5-13
Calibration
cause the message “Bad Calibration Wrong CAL Entry” to appear in the
following step.
5. Adjust regulator for a flowmeter ndcaton of approxmately 2 SCFH.
Wat untl the Measured readng stablzes (approxmately 3 mnutes),
and then press
ENT
to calbrate the NO
2
Measured value to that of the
Appled value. The message “Good Calbraton” should brefly appear
followed by the CALIBRATION LIST screen beng re-dsplayed.
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 cylnder.
5.10 CO-HI Sensor Calibration
Ths procedure spans the optonal carbon monoxde hgh sensor (4,001 to
20,000 ppm) to a known gas level.
Material Required:
Calbraton Kt, P/N 24-7059
Gas Cylnder: 4,000 ppm CO n Ar, P/N 24-1155
Procedure:
1. If not already done, turn ON the analyzer and dsplay the
CALIBRATION LIST screen per Secton
5.2
.
2. Use the buttons to hghlght CO-HI, and
then press
ENT
to dsplay the CALIBRATE
CO-HI 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 cylnder to the
regulator of the calbraton fxture shown n
Fgure 5-
2
on Page 5-14.
•
•
CALIBRATION LIST
(more)
T-Air
CO-LO
SO
2
NO
NO
2
CO-HI
T-Ref
MENU
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