Bacharach PCA 2 24-9448, Operating & Maintenance Instructions

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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, meanng
that the calbraton data for each sensor s stored n nonvolatle memory
on the sensor’s prnted crcut board.
Benefits of Smart Sensors:
New sensors can be nstalled wthout needng to be calbrated.
Sensors can be pre-calbrated and nstalled when needed.
Sensors can be moved from one analyzer to another.
The analyzer’s dagnostcs screen shows what sensors are nstalled,
and ther current end-of-lfe condton (Good, Low, Bad).
Each sensor stores ts calbraton hstory and operatng parameters,
whch can be downloaded to a computer and analyzed. Ths nforma-
ton s useful n determnng when the sensor was last calbrated, and
predctng ts end-of-lfe.
The smart sensors should be calbrated by an authorzed Bacharach
Servce Center (Secton
8.3
) every 6 months to assure that the analyzer
contnues to meet ts publshed accuracy specfcatons. The smart sensors,
however, can be calbrated n the feld f your faclty has the necessary
equpment and qualfed personnel to perform the procedures descrbed n
the followng sectons of ths nstructon manual.
5.2 Starting a Calibration
Start any calbraton procedure by dong the followng:
1. Place the probe n an area of fresh ar, turn ON the analyzer, allowng
t to cycle through ts 60 second warm-up perod. Durng warm-up,
the analyzer’s operaton s checked and the sensors are set to the fol-
lowng ambent condtons:
Oxygen sensor spanned to 20.9%
All gas sensors are zeroed
The pressure sensor s zeroed
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