EN-16
STARTER 2200 Bench pH Meter
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:
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
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.
5.4
Self-diagnosis
Press and hold button-
and button-
simultaneously until the meter display
the full screen. Each icon blinks one after the other.
This way you may check whether all icons are correctly shown. The next step is to check that the
keys are functioning correctly. This requires user interaction.
When
b
blinks, five icons are displayed.
Press the five keys in any order. Each time you press a key an icon disappears from the
screen, continue to press the other keys until all the icons have disappeared.
When the self-diagnosis has been completed successfully,
appears, means “pass”. If self-
diagnosis fails, error message
Err
appears.
Note:
You have to finish pressing all five keys within
2 minutes
, otherwise
Err
appears and you
will have to repeat the procedure.
5.5
Recover factory settings
When the meter is off, press and hold button-
& button-
& button-
together for 3 seconds, the screen displays
and blinks,
means “Reset”.
Then we have 2 choice:
Press button-
to reset factory settings (MTC, slope and offset, etc.), display
then restart the meter.
Or press button-
to quit the setting, display
then turn off the meter.
