44
MAINTENANCE
CALIBRATION REQUIREMENT
Calibration of the PCA 300 and PCA 301 series of Chlo-
rine Analyzers is not normally required. The DPD technique
for measuring Chlorine concentration is well established and
consistent. Also, by measuring the sample blank absorbancy
to establish the zero reference with each measurement, the
accuracy of the analyzer is assured.
If, for any reason, the Chlorine measurements are inaccurate
proceed with the calibration procedure (see page 48).
HYDRAULIC SYSTEM
A visual check of the hydraulic compartment can detect leaks,
pump tubing fatigue or breakage.
These periodic checks help ensure reliable analyzer perfor-
mance.
If a pump tube is interrupted and the
reagents are not added to the sample,
the system error LED and relay will be
activated to notify the user.
REAGENTS SUPPLY
PCA 300 and PCA 301 warn the user
when the reagents level reaches ap-
proximately 20%.
The green LED (mg/L) will start blink-
ing and, working at maximum capacity
(5 minutes sampling rate), the analyz-
ers can operate for 4 more days.
The alarm system is based on an in-
ternal counter that has to be reset every
time the reagents are replaced.
The counter keeps track of the number
of measurements taken and informs the user when it reaches
the 8640
th
sample.
