17
7+Series Version 2.0
temperature value blinks when press
key, press
and
key to adjust the temperature value, and
when press
key, conductivity value blinks.
Only 1-point calibration for customer-defined calibration. The value set in “customer-defined” is at a fixed
temperature. There is no regulations of temperature coefficient and reference temperature. The meter has to perform
calibration and measurement at the same temperature to avoid large error. The meter cannot recognize customer-
defined calibration solution.
As for the standard calibration also in customer calibration the meter show on the LCD one icon indicating the suited
range.
Display icon
Suited range
< 1300 μS/cm
1300 -
1500 μS/cm
> 1500 µS/cm
Measure
Rinse conductivity electrode in pure water, allow it to dry, and submerge it in the sample solution. Stir the solution
briefly and allow it to stay in the sample solution until a stable reading is reached and stability
icon appears on LCD, then get the reading value which is the conductivity value of the solution.
During the process of calibration and measurement, the meter has self-diagnosis functions
Display Icons
Contents
Checking
Wrong conductivity calibration solution or
the meter recognition of calibration
solution out of range
1.Check whether conductivity calibration
solution is correct.
2.Check whether the meter connects the
electrode well.
3.Check whether the electrode is damaged.
Press
key when measuring value is
not stable during calibration.
Press
key
when
icon appears
During calibration, the measuring value is
not stable for ≥3min.
1.Shake the electrode to eliminate bubbles in
electrode head.
2.Replace with new pH electrode.
Factory default setting
For factory default setting, please refer to parameter P2.8. All calibration data is deleted and the meter restores to the
theory value. Some functions restore to the original value (refer to appendix -1). When calibration or measurement fails,
please restore the meter to factory default setting and then perform re-calibration or measurement. Please note once
set the factory default, all the data deleted will not be retrievable.
