Troubleshooting - YSI Pro2030 User Manual

to air dry completely. Next, use a new clean, dry cap membrane to screw over the
sensor. This will keep the sensor dry and protect the anode and cathode during
storage. Ensure the conductivity sensor is clean and dry.
After storing for a long period of time, it is necessary to "condition" the dissolved
oxygen sensor by installing a new membrane with electrolyte solution.
Long Term Storage Temperature: -5 to 70°C (23 to 158°F)
T R o U B L E S H o o T I N G
Symptom
Instrument will not turn on,
a battery symbol appears,
or "Critical Shutdown"
displays on the screen.
Barometer reads over/undr and
calibrating Dissolved oxygen
results in a Barometric Pressure
over/Undr error message.
Temperature values display
over or Undr on Run screen.
Instrument will not calibrate
dissolved oxygen; instrument
displays "Calibration over",
"Calibration Under", or "Unstable
Reading" during calibration.
Possible Solution
1. Low battery voltage, replace batteries.
2. Batteries installed incorrectly,
check battery polarity.
3. Return system for service.
1. Barometer failure, return
system for service
1. Sample temperature is less than -5° C or
more than +55°C. Increase or decrease
the sample temperature to bring within
the allowable range.
2. Contact YSI Tech Support.
1. Verify barometer reading.
2. Verify correct sensor and membrane
type selection in the System Setup menu.
3. Calibration sleeve may not be
100% water saturated, ensure
sponge is moistened.
4. Ensure adequate sample movement if
performing mg/L or ppm calibration.
5. Allow sufficient stabilization time for
dissolved oxygen and temperature AND
wait at least 3 seconds before confirming
a Do% or Do Local% calibration.
6. Replace membrane and electrolyte.
7. Clean sensor electrodes.
8. Contact YSI Tech Support.
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Symptom
Do readings are inaccurate. 1.
2.
3.
4.
5.
6.
7.
8.
Dissolved oxygen values display 1.
over or Undr on Run screen.
2.
3.
4.
5.
6.
7.
8.
Possible Solution
Verify correct sensor/membrane type
selection in the System Setup menu.
Verify conductivity readings are
accurate. Conductivity is used
in the calculation of mg/L.
Verify temperature readings
are accurate.
Sample temperature should be
between 0 and 45 ºC, the temperature
compensation range for Do mg/L.
Do sensor not properly calibrated,
recalibrate the sensor.
Replace membrane and
electrolyte. Recalibrate.
Clean sensor electrodes.
Contact YSI Tech Support.
Verify correct sensor/membrane type
selection in the System Setup menu.
If using a polarographic sensor,
allow instrument to warm up for
5 – 15 minutes before use.
Sample dissolved oxygen concentration
is more than 50 mg/L or 500%, or
less than –0.02 mg/L or -0.3%.
Verify conductivity
readings are accurate.
Verify temperature readings
are accurate.
Replace membrane and
electrolyte. Recalibrate.
Clean sensor electrodes.
Contact YSI Tech Support.
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