Maintenance; Error Message; Meter Maintenance; Electrode Maintenance - OHAUS STARTER 2100 Instructions Manual

STARTER 2100 Bench pH Meters
5

MAINTENANCE

5.1

Error message

If the measurement out of range, pH: < 0.00 or > 14.00;mV: < -1999 or > 1999; the buffer
temperature T[°C] < 5 or > 40, then the meter will display "- - -".
If meter display "Err", it means
Err
Self-diagnosis failure
Or Calibration failure
For further technical support please contact Ohaus. (US & Canada please call 1-800-672-7722)
5.2

Meter maintenance

Attention: Never unscrew the two halves of the housing!
The STARTER 2100 series instruments do not require any routine maintenance.
To clean, use a damp cloth.
The housing is made of acrylonitrile butadiene styrene (ABS). This material is susceptible to
damage by some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any
spillage should be immediately wiped off.
5.3

Electrode maintenance

Attention: 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:
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
o
acetone or a soap solution.
After electrode treatment, a new calibration should be performed. If the electrode slope is still not
good, the electrode might need to be replaced.
Repeat the self-diagnosis. (See 5.4)
Calibration failure (slope < 85%, offset > 60mV);
you need to use fresh buffer to do calibration
again properly; if still not good, need to replace
the pH electrode.
EN-13