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7
Troubleshooting
Problem
No display
"LO" displays
in the LCD
Unstable
readings
Slow response
Inaccurate
readings /
can't calibrate
"Er1"
COND / TDS
"Er2"
Temperature
calibration error
24
Cause
Batteries are not installed, were
improperly installed, or are too weak
Low battery
a) Air bubbles in probe
b) Dirty probe
c) Probe not immersed enough
d) External noise pickup or
induction caused by nearby
electric motor
e) Broken probe
Dirty / Oily probe
Probe guard not installed or
calibration solution incorrect
Attempted calibration value
was not within the ±40%
auto calibration window
Auto calibration was not within
(0 - 50°C) temperature range
Solution
Install batteries with correct +/- polarity.
Replace with new batteries
Replace batteries
a) Tap probe to remove bubbles
b) Clean probe & recalibrate
c) Make sure sample entirely
covers the probe sensors
d) Move or switch off
interfering motor
e) Replace probe
Clean & recondition probe
Install probe guard & replace
calibration solutions
Check the value of the conductivity
calibration solution. Switch to manual
calibration mode and re-calibrate
Ensure that the temperature is
within the acceptable range
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