YSI Pro1030 - Manual (Page 18)

28 29
Symptom Possible Solution
Instrument will not
calibrate pH or oRP;
instrument displays
“Calibration over”,
“Calibration Under”,
or “Unstable Reading”
during calibration. 1. Verify correct sensor type selection
in the System Setup menu.
2. Verify the calibration
solution is accurate.
3. If calibrating pH, make sure you
are calibrating buffer 7 first.
4. Clean the pH or oRP sensor.
5. Contact YSI Tech Support.
pH or oRP readings are
inaccurate. 1. Verify correct sensor type selection
in the System Setup menu.
2. Verify temperature readings
are accurate.
3. Recalibrate the pH or oRP sensor.
4. Clean the pH or oRP sensor.
5. Contact YSI Tech Support.
pH values display over
or Undr on Run screen. 1. Verify correct sensor type selection
in the System Setup menu.
2. Sample pH value is outside the
measurement range of 0 to 14.
3. Verify temperature readings
are accurate.
4. Recalibrate the pH sensor.
5. Clean the pH sensor and recalibrate.
6. Contact YSI Tech Support.
oRP values display over
or Undr on Run screen. 1. Verify correct sensor type selection
in the System Setup menu.
2. Sample oRP value is outside
the measurement range of
-1500 to 1500 mV.
3. Verify temperature readings
are accurate.
4. Recalibrate the oRP sensor.
5. Clean the oRP sensor and recalibrate.
6. Contact YSI Tech Support.
Symptom Possible Solution
Instrument will
not calibrate the
Conductivity sensor;
instrument displays
“Calibration over”,
“Calibration Under”,
or “Unstable Reading”
during calibration. 1. Ensure the conductivity sensor is
clean. Follow the cleaning procedures
in the Care, Maintenance and
Storage section of this manual.
2. Verify the calibration solution
is above the two holes near
the cable, see figure 8.
3. Verify the calibration solution is
not expired or contaminated. Try
a new bottle of solution.
4. Ensure you are entering in the correct
value for the solution according to the
measurement units. 1 mS = 1,000 uS.
5. Allow sufficient stabilization time
for conductivity and temperature
AND wait at least 3 seconds
before confirming a calibration.
6. Contact YSI Tech Support.
Conductivity readings
are inaccurate. 1. Ensure the conductivity sensor is
clean. Follow the cleaning procedures
in the Care, Maintenance and
Storage section of this manual.
2. Verify the sample is above the two
holes near the cable, see figure 8.
3. Verify calibration.
4. Verify temperature readings
are accurate.
5. Verify the correct units are setup in the
System Setup menu, i.e. uS vs mS and
Conductivity vs. Specific Conductance.
6. Contact YSI Tech Support.
Conductivity values
display over or Undr
on Run screen. 1. Ensure the conductivity sensor is
clean. Follow the cleaning procedures
in the Care, Maintenance and
Storage section of this manual.
2. Verify the sample is above the two
holes near the cable, see figure 8
3. Verify calibration.
4. Verify temperature readings
are accurate.
5. Sample conductivity is outside
the measurement range of the
instrument, i.e. 0-200 mS.
6. Contact YSI Tech Support.