What To Do If; Ph/Orp - wtw VWR MU 6100 H Operating Manual

MU 6100 H
Error message
OFL, UFL
Error message,
Error
ba77077e06 05/2021
15

What to do if...

15.1 pH/ORP

More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
The measured value is outside the measuring range.
Cause
Electrode:
– Air bubble in front of the junction
– Air in the junction
– Cable broken
– Gel electrolyte dried out
– The measured value is outside
the measuring range of the meter
Cause
Electrode:
– The values determined for zero
point and slope of the electrode
are outside the allowed limits.
– Junction contaminated
– Electrode broken
Buffer solutions:
– Incorrect buffer solutions
– Buffer solutions too old
– Buffer solutions depleted
What to do if...
Remedy
– Remove air bubble
– Extract air or moisten junction
– Replace the electrode
– Replace the electrode
– Use a suitable electrode
Remedy
– Recalibrate
– Clean the junction
– Replace the electrode
– Change calibration procedure
– Use only once.
Note the shelf life
– Change solutions
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