YSI MultiLab 4010P-1 - Manual (Page 88)

What to do if... MultiLab 4010-1
88 ba76141e03 03/2014
14 What to do if...
14.1 pH
Error message
OFL, UFL
Error message,
Error
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
IDS pH sensor:
– Measured value outside the
measuring range
– Use suitable IDS pH sensor
– Air bubble in front of the junction – Remove air bubble
– Cable broken – Exchange IDS pH sensor
– Gel electrolyte dried out – Exchange IDS pH sensor
Cause Remedy
IDS pH sensor:
– The values determined for zero
point and slope of the pH sensor
are outside the allowed limits.
– Recalibrate
– pH sensor contaminated – Clean IDS pH sensor
– pH sensor broken – Exchange IDS pH sensor
Buffer solutions:
– The used buffer solutions do not
agree with the set buffer set
– Set different buffer set
or
– Use different buffer solutions
– Buffer solutions too old – Use only once.
Note the shelf life
– Buffer solutions depleted – Change solutions