Hach ORBISPHERE Manual Básico Del Usuario página 17

Problem
Calibration is out of specification
or response time is too slow.
Probable cause
Sensor incorrectly setup.
Temperature
measurement incorrect.
Barometric pressure
incorrect.
Cartridge incorrectly
assembled on sensor.
Sensor electrodes are
dirty.
Sensor maintenance is
required.
Possible solution
Check the sensor parameters on the instrument.
Re-calibrate the sensor.
Control the temperature with an external
reference.
Re-calibrate the sensor.
Calibrate the barometric pressure sensor using
the instrument.
Re-calibrate the sensor.
Verify the cartridge assembly is firmly screwed
onto the sensor and that the membrane is tight.
Re-calibrate the sensor.
Clean the sensor using the ORBISPHERE
32301 cleaning and regeneration center as
explained in this section.
Re-calibrate the sensor.
Replace the membrane by installing a new sensor
cartridge as explained in this section.
Re-calibrate the sensor.
English 17