LABEC M-PL-600 - Manual (Page 16)

good quality, then recalibrate the electrode. If the error still occurs,
please change the electrode and calibrate the electrode.
Err9：During 2 point/3point calibration, instrument judge 1point ( or 2 points)
which used buffer solution are same ( or the electrode has
damaged), the instrument will judge the reliable calibration
operation and modify the relative electrode parameter. If this
occurs, please recalibrate the pH electrode.
11. Maintenance of the instrument
The performance of the instrument, is not only rely on the self
construction of the instrument, but also on good maintenance. Especially
for pH meter, which high impedance is needed, and corrosive chemical
agents is sometimes contaminated, therefore, necessary maintenance is a
must
Please, only when the instrument is power off, the plug of the adaptor
could be removed.
Please keep the instrument away from directly sunshine, otherwise
the life time of the LCD will be shortened.
The pH value of the sample solution should be between the pH buffer
solutions you selected. If the temperature of the buffer solution during
calibration is same as the temperature of the sample, the highest
resolution will be reached by the instrument.
Temperature compensation function in the instrument is only
effected to compensate the sample temperature changes
according to pH sensor.
The electrode plug should always keep high cleaning and dry. In order
to protect the electrode from broken, please do not contact the head of the
electrode with hard materials, since it is very thin. Please refer to the
instruction manual of the electrode for the storage, cleaning and
maintenance of the electrode. .
Please do not contact the central part of the BNC electrode plug by
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