JUMO AQUIS 500 RS, Руководство по эксплуатации

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8 Calibrating sensors
8.3 JUMO tecLine Cl2, TC, ClO2/O3, H2O2/PAA, Br
(types 20263x with digital interface)
8.3.1 General information
These sensors for disinfectants require defined and constant flow conditions
for measurement. These flow conditions can best be achieved in a suitable fit-
ting. The sensors are therefore not removed from the fitting for calibration.
Calibration methods
The JUMO AQUIS 500 RS offers two calibration methods for the sensors of
type JUMO tecLine 20263x:
• End value calibration (typical method), in which the slope of the sensor is
calibrated, see chapter 8.3.2 "End value calibration", page 79
• 2-point calibration, in which the zero point and slope of the sensor are cal-
ibrated – see, see chapter 8.3.3 "Two-point calibration", page 81
Preparatory work
• Fill the membrane cap with electrolyte for initial startup.
This procedure is described in detail in the operating manual for the sensors.
Calibration interval
The sensors must be calibrated:
• For initial startup
• After each replacement of electrolyte
• After each power failure
The sensors should be calibrated:
• One day after initial startup
• Weekly during operation, and more frequently if needed
NOTE
When starting the calibration, the device sets the analog outputs, switching
outputs and controllers to the following states by default:
• "Moving" (analog outputs)
• "Inactive" (switching outputs)
• "HOLD mode", output level frozen (controller)