avantor VWR CO-330 Bedienungsanleitung Seite 4

TROUBLESHOOTING
Problem Cause
Meter not switching Discharged batteries
on / No power
Incorrect battery polarity
Battery failure
Power adapter failure
Unstable reading, lack Poor connection
of reading
Air bubbles in the conductivity sensor cell
Conductivity cell contaminated/broken
Break in cable, connector or internal in sensor
Measured value out of the sensor range
The temperature of the solution is fluctuating
There is a motor or other device causing
electrical interference.
To short result stabilisation time
Conductivity cell not immersed properly
Conductivity sensor defective
Meter is not Sensor, electrodes contaminated
calibrating
Calibration mode not entered properly
Intermittent or no connection of conductivity
sensor
The temperature of the standard solution is
fluctuating
Stabilisation time not long enough
Conductivity sensor defective
Result different than Conductivity sensor not calibrated
expected
Sensor polluted
Air bubbles in the conductivity sensor cell
Reading stabilisation time to short
The temperature of the solution is fluctuating
During calibration improper or old standard
solution used or standard temperature not
correct
Conductivity cell not immersed properly
Conductivity sensor defective
Temp. value incorrect Temperature sensor not connected or poor
connection
or symbol
Breakage in temp sensor cable or connector /
displayed defective sensor
Information: Conductivity sensor calibration data loss
conductivity
If the situation appears after each switching
calibration readout
on
error!
Information: Internal hardware or software problem /
Manufacturer's Losing factory settings
settings readout error!
4
Solution
Charge batteries
Check the polarity
Replace batteries with AA (R6) Rechargeable type
Check with other 5V USB power adapter (for
mobile)
Check conductivity sensor connection to the unit
Check for air bubbles, make few vertical moves with
the cell in the solution
Clean the electrodes according to its manual or
replace the conductivity sensor
Check cable and connector, replace the sensor
Use a different sensor or meter
Measure after the solution temperature stabilizes
Move the meter to a place where it is not subject to
dielectric effects. Be sure to ground devices that are
using commercial electricity.
Response time may slow down, depending on the
properties of the sample solution.
Make sure the sample entirely covers the probe
sensors Probe not immersed enough
Replace sensor
Clean electrodes or replace the sensor
Press the result to show frame around it. Press and
hold the CAL button till displaying red background
colour.
Check sensor connection to the unit
Measure after the standard solution temperature
stabilizes
Wait longer for result stabilisation
Replace sensor
Calibrate the sensor
Clean the sensor
Check for air bubbles, make few vertical moves with
the cell in the solution
Longer wait for result stabilisation
Measure after the solution temperature stabilizes
Repeat calibration with new, correct standard
solution value and correct settings in the meter and in
an accurately controlled temperature of 25 °C
Make sure the sample entirely covers the probe
sensors
Replace sensor
Connect the temp. sensor / check the connection
Check connection / replace sensor
Recalibrate the conductivity sensor sensor
Contact distributor or service agent
Contact distributor or service agent