Milwaukee MW151 MAX - Troubleshooting

48 MW150 & MW151 Bench Meters
13. TROUBLESHOOTING
SYMPTOMS PROBLEM SOLUTION
Slow response /
excessive drift
Dirty pH electrode Soak the electrode tip in MA9016
cleaning solution for 30 minutes,
then follow the Cleaning procedure
Reading fluctuates
up and down (noise)
Clogged/Dirty junction.
Low electrolyte level
(refillable electrodes only)
Clean the electrode.
Refill with fresh MA9012 electrolyte
Full scale value
displayed blinking
Reading out of range Check if the sample is
within measurable range; check
electrolyte level and general
electrode status
mV scale out of range Dry membrane or
dry junction
Soak electrode in MA9015 storage
solution for at least 30minutes
°C or °F displayed blinking Out of order
temperature probe
Replace temperature probe
Meter does not work with
temperature probe
Broken temperature probe Replace temperature probe
Meter fails to calibrate or
gives faulty readings
Broken pH electrode Replace electrode
“WRONG CAL” is displayed
during pH calibration
Wrong or
contaminated buer
Check that buer solution is
correct and fresh
“Internal Er X” Internal error Restart the meter.
If error persists, contact Milwaukee
Technical Service.