Hach Lange sensION+ EC71 Manual page 24

6. Maintenance
6.1. Clean the instrument
Important note: Never use cleaning such as turpentine, acetone
or similar products to clean the instrument including the display
and accessories.
Only clean the housing and accessories using a soft, damp cloth.
Mild soap solution may also be used. Dry the cleaned parts care-
fully with a soft cotton cloth.
CAUTION
When using chemicals or solvents, comply with the instruc-
tions of the producer and all local safety regulations.
6.2. Sensor cleaning
See the manual of the sensor in use.
20
sensION+ EC71 HACH LANGE 7010.indd ANG:20 sensION+ EC71 HACH LANGE 7010.indd ANG:20
7. Warning messages
During calibration
CALIBRATION CALIBRATION
X standard
BUFFER NOT RECOGNISED ATENTION !
Check temperature.
Check the cell.
Continue...
CALIBRATION 2 CALIBRATION 2
standard
ATENTION ! ATENTION !
C < 0.05 ó > 50.00
Check the cell.
Check the standards.
Continue...
CALIBRATION 2 CALIBRATION 2
standard
ATENTION ! ATENTION !
C difference > 30 %
Check the cell.
Check the standards.
Continue...
CALIBRATION
CALIBRATION
2/3 standard
SAME STANDARDS ATENTION !
Check the cell.
Continue...
CALIBRATION
X standard
STANDARD TEMPERATURE
< 15˚C or > 35 ˚C
Continue...
During measurement
MEASURE STABLE
23.2˚C
728
uS/cm @ 25˚C
Calibrate again
MEASURE
by stability
CE
out of range
Check the cell.
MEASURE
by stability
˚C
out of range
Check temp. sensor
MEASURING
by stability
ATENTION! TC = 0
It's impossible to
meas. salinity
Continue...
MEASURE
by stability
UNSTABLE READING
Time > 150 s
Check temperature.
Check the cell.
X standard
standard
standard
2/3 standard
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