Maintenance; Clean The Instrument; Sensor Cleaning; Warning Messages - Hach senslON+ MM 374 Manual De Instrucciones

6. Maintenance

6.1. Clean the instrument

Important note: Never use cleaning agents 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.

7. Warning messages

During calibration
CALIBRATION CALIBRATION
1st buffer
ATENTION ! ATENTION !
Asymmetry > 58 mV
Buffer or electrode
in poor conditions.
Continue...
CALIBRATION 2
nd buffer
ATENTION !
Sens. (a) < 70 %
Continue...
CALIBRATION CALIBRATION
X buffer
UNSTABLE READING ATENTION !
Time t> 100 s
Check temperature.
Check the electrode.
Continue...
CALIBRATION CALIBRATION
X buffer
BUFFER NOT RECOGNISED ATENTION !
Electrode in poor
conditions.
Continue...
CALIBRATION CALIBRATION
2/3 buffer
SAME BUFFERS ATENTION !
Check the electrode.
Continue...
During measurement
MEASURE STABLE MEASURE STABLE
pH 12.78 728
19˚C
Calibrate again Calibrate again
MEASURING MEASURING
by stability
pH CE
out of range out of range
Check the electrode. Check the cell.
MEASURING
by stability
˚C
out of range
Check temp. sensor
MEASURING MEASURING
by stability
UNSTABLE READING ATENTION! TC = 0
Time > 60 s
It's impossible to
meas. salinity
Check temperature.
Check the electrode. Continue...
MEASURING
MEASURING
by stability
UNSTABLE READING UNSTABLE READING
Time > 150 s
Time > 150 s
Check temperature.
Check temperature.
Check the electrode. Check the cell.
MEASURING
by stability
Measuring by stability.
UNSTABLE READING
Time > 300 s
Strict criterion.
Check temperature.
Check the electrode.
MEASURING
by stability
10.389 mg/l >>>>>
ISE: Measured value superior to the
highest standard used in calibration.
00012 00:13
MEASURING
by stability
0.086 mg/l <<<<<<
ISE: Measured value inferior to the
lowest standard used in calibration.
00018 00:11
1st buffer
X buffer
X buffer
2/3 buffer
23.2˚C
uS/cm @ 25˚C
by stability
by stability
by stability
23