14
Symptom
Possible Solution
Instrument will
not calibrate
dissolved oxygen.
1. Verify calibration routine - correct
barometric pressure, salinity input,
and calibration environment.
2. Allow sufficient stabilization time for
dissolved oxygen and temperature.
3. Check sensor cap. Clean, rehydrate
or replace as necessary.
4. Contact YSI Tech Support.
DO readings are
inaccurate.
1. Verify temperature readings are accurate.
2. Sample temperature should be
between 0 and 45 ºC, the temperature
compensation range for DO mg/L.
3. DO sensor not properly calibrated,
recalibrate the sensor.
4. Check sensor cap. Clean, rehydrate or
replace as necessary. Recalibrate.
5. Contact YSI Tech Support.
Dissolved Oxygen
values display
Over or Undr on
Run screen.
1. Sample dissolved oxygen concentration
is more than 20 mg/L or 200%, or
less than 0.0 mg/L or 0.0%.
2. Verify temperature readings are accurate.
3. DO sensor not properly calibrated,
recalibrate the sensor.
4. Check sensor cap. Clean, rehydrate or
replace as necessary. Recalibrate.
5. Contact YSI Tech Support.
S P E C I F I C A T I O N S
These specifications represent typical performance and are subject to
change without notice. For the latest product specification information,
please visit YSI’s website at ysi.com or contact YSI Tech Support.
Parameter
Range
Resolution
Accuracy
Temperature
0 to 50°C*
0.1°C
± 0.3°C
Dissolved
Oxygen
0.0 to 200%
air saturation
1% or 0.1%, user
selectable
± 1.5% of reading or
± 1.5% air saturation,
whichever is greater
0.00 to
20.0 mg/L
0.1 or 0.01 mg/L
± 1.5% of reading
or ± 1.5 mg/L,
whichever is greater
Barometer
500 to 1125
mBar
1.0 mBar
manual entry
