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44 MW105 & MW106 Portable Meters
13. TROUBLESHOOTING
Symptoms
Slow response/
excessive drift
Display shows
blinking full scale
value
mV scale
out of range
Display shows
blinking °C or °F
Meter fails to
calibrate or gives
faulty readings
LCD tags displayed
continuously at
startup
"Internal Er X"
Problem
Dirty pH electrode
Reading out of
range
Dry membrane or
dry junction
Disconnected
temperature sensor
Broken probe
ON/OFF key is
blocked
Internal hardware
error
Solution
Soak the electrode tip in
MA9016 for 30 minutes,
then follow the Cleaning
procedure.
Check if the sample is
within measurable range;
check general electrode
status.
Soak electrode in MA9015
storage solution for at
least 30 minutes.
Reconnect temperature
sensor or replace the
electrode.
Replace the probe.
Check the keyboard.
If error persists, contact
Milwaukee Technical
Service.
Restart the meter.
If error persists, contact
Milwaukee Technical
Service.
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