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Instruction 24-9448 5-1
Calibration
5 Calibration
IMPORTANT: Before performing any calibration procedure,
ensure that fresh batteries are installed or use the optional AC
power adapter. Also ensure that the analyzer is at room temper-
ature and will be sampling fresh air when turned ON.
5.1 Smart Sensors
The PCA 2 uses Bacharach’s new “Smart Sensor” technology, meaning
that the calibration data for each sensor is stored in nonvolatile memory
on the sensor’s printed circuit board.
Benefits of Smart Sensors:
New sensors can be installed without needing to be calibrated.
Sensors can be pre-calibrated and installed when needed.
Sensors can be moved from one analyzer to another.
The analyzer’s diagnostics screen shows what sensors are installed,
and their current end-of-life condition (Good, Low, Bad).
Each sensor stores its calibration history and operating parameters,
which can be downloaded to a computer and analyzed. This informa-
tion is useful in determining when the sensor was last calibrated, and
predicting its end-of-life.
The smart sensors should be calibrated by an authorized Bacharach
Service Center (Section
8.3) every 6 months to assure that the analyzer
continues to meet its published accuracy specifications. The smart sensors,
however, can be calibrated in the field if your facility has the necessary
equipment and qualified personnel to perform the procedures described in
the following sections of this instruction manual.
5.2 Starting a Calibration
Start any calibration procedure by doing the following:
1. Place the probe in an area of fresh air, turn ON the analyzer, allowing
it to cycle through its 60 second warm-up period. During warm-up,
the analyzer’s operation is checked and the sensors are set to the fol-
lowing ambient conditions:
Oxygen sensor spanned to 20.9%
All gas sensors are zeroed
The pressure sensor is zeroed
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