OHAUS starter 3100, Instruction Manual

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13
5 Maintenance
5.1 Error message
Error 0 Memory access error Reset to factory settings
Error 1 Self-diagnosis failed Repeat the self-diagnosis procedure and make
sure that you finish pressing all five keys within
two minutes.
Error 2 Measured values out of range Check if the electrode is properly connected and
placed in the sample solution.
Error 3 Measured buffer temperature
out of range (<5 or >40 °C) Keep the pH buffer temperature within the range
for calibration
Error 4 Offset out of range
offset > 60mV or < - 60 mV Make sure the pH buffer is correct and fresh;
Clean or replace the pH electrode.
Error 5 Slope out of range Make sure the buffer is correct and fresh; Clean
or replace the pH electrode.
Error 6 Meter cannot recognize the
buffer Make sure the buffer is correct and fresh; check if
the buffer has not been used more than once.
Error 9 The current data set has
already been stored once An endpoint reading can only be stored once.
Perform a new measurement to store.
Error 10 The sample temperature out
of range Check the sample temperature, the temperature
sensor.
If error happens, the meter will also beep 3 times to alert.
Any more problems, you can contact Ohaus sales rep or email pH@ohaus.com .
5.2 Meter maintenance
Never unscrew the two halves of the housing!
The
STARTER 3100
series instruments do not require any maintenance other than occasional wipe
with a damp cloth and the replacement of depleted batteries.
The housing is made of acrylonitrile butadiene styrene (ABS). This material is attacked by some
organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be
immediately wiped off.
5.3 Electrode maintenance
Make sure the electrode is filled with electrolyte solution. Always store the electrode according to
the electrode instruction manuals and do not allow it to dry out.
If the electrode response becomes sluggish or the slope is not good enough, try:
o
Soak the electrode in 0.1M HCl for more than 8 hours.
o
For fat or oil contaminant, degrease the membrane with cotton wool soaked in either