Questions And Answers - TESTO 206 Instruction Manual

7. Questions and Answers

Question
Readings instable.
lights up.
Instrument switches
itself off.
Er1 lights up.
Er2 lights up.
Er3 lights up.
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7. Questions and Answers
Possible causes
Static charge.
Air cushion from measurement
electrode gets into measurement
tip.
pH electrode has dried out.
Remaining capacity of battery
< 10h.
Auto Off function is switched on.
Invalid gradient value
of pH electrode.
pH electrode defective.
Invalid offset value
of the pH electrode.
pH electrode defective.
Invalid gradient value
of pH electrode following
3 point calibration.
pH electrode defective.
Possible solution
Rinse off pH electrode
with tap water or
low concentration
soap water.
Shake pH electrode in a
downward direction like
with a fever thermometer.
Place pH electrode for
several hours in water or
diluted hydrochloric acid.
Change battery (See
6.4 Changing battery,
P. 13)
Auto Off.
(See 5.2 Setting
instrument, P. 8)
Recalibrate instrument,
a new buffer solution
could be used.
When using a probe
without temperature
sensor: check set
temperature value.
Change probe.
Recalibrate instrument,
a new buffer solution
could be used.
Change probe.
Recalibrate instrument,
a new buffer solution
could be used.
Change probe.
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