METER HYDROS 21 GEN 1, Руководство пользователя, Страница: 17 / 22

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SERVICE
2. If the sediment does not all come off with running water, soak the sensor in a mixture of
water and dish soap for 1 h.
3. Repeat step 1 .
4.2.2 ELECTRICAL CONDUCTIVITY SENSOR
The four-electrode conductivity measurement is less sensitive to sensor fouling than a
two-electrode sensor, but contamination of the electrodes can still affect the measurement.
Follow these steps to clean the HYDROS 21 EC array:
1. Put on gloves.
NOTE: Do not touch the screws without gloves or contact allow contact with any source of oil or other
nonconducting residue.
2. Insert a swab into the slot on the side of the sensor housing.
3. Rub the screws vigorously with the swab.
NOTE: Take care not to damage the pressure sensor with the swab.
4. Rinse the sensor and screws thoroughly with tap or distilled water.
4.3 TROUBLESHOOTING
Table 3 lists common problems and their solutions. If the problem is not listed or these
solutions do not solve the issue, contact Customer Support .
Table 3 Troubleshooting the HYDROS 21
Problem Possible Solutions
Sensor not responding
Ensure sensor is installed correctly.
Check power to the sensor.
Check sensor cable and stereo plug connector integrity.
Check data logger wiring to ensure brown is power supply, orange is
digital out, and bare is ground.
Sensor is not logging
readings
Ensure the data logger batteries are not dead or weakened.
Check configuration of the data logger in ZENTRA Utility to ensure
the HYDROS 21 is selected.
Ensure the most recent software and firmware are installed from
metergroup.com .
Inaccurate pressure
readings
Check pressure sensor to ensure it is clean and free of sediment or
other debris ( Customer Support ).
Check for anything interfering with the opening of the vent.