10
“Error”: the concentration of the calibration solution used is not correct.
Repeat the
calibration procedure
with the right standard solution, and
verify it is not expired. If the calibration procedure fails again, contact your
dealer or the nearest Hanna Customer Service Center.
ERROR MESSAGES
a) on zero reading
This indicates that the zeroing procedure failed due to a low signal-to-noise
ratio. In this case press ZERO again.
“No Light”: the instrument cannot adjust the light level. Please check that
the sample does not contain any debris.
“Light Low”: there is not enough light to perform a measurement. Please
check the preparation of the zero cuvet.
“Light High”: there is too much light to perform a measurement. Please check
the preparation of the zero cuvet.
b) on sample reading
There is too much light for the sample measurement. Please check if the right
sample cuvet is inserted.
“Inverted”: the sample and the zero cuvet are inverted.
“Zero”: a zero reading was not taken. Follow the instruction in the
measurement procedure
for zeroing the meter.
Under range. A blinking "0.00" indicates that the sample absorbs less
light than the zero reference. Check the procedure and make sure you
use the same cuvet for reference (zero) and measurement.
A flashing value of the maximum concentration indicates an over range
condition. The concentration of the sample is beyond the programmed
range: dilute the sample and re-run the test.
A flashing value lower than the maximum concentration indicates a low
signal-to-noise ratio condition. In this case accuracy of the result is not
guaranteed. Repeat the
measurement procedure
.
15
• Remove the cuvet and place the CAL
CHECK™ Standard HI 95724-11 Cuvet
B
into the holder. Ensure that the notch on
the cap is positioned securely into the
groove.
• Press CAL CHECK and “SIP” will blink during
measurement.
• Wait for a few seconds and the display will
show the validation standard value.
The reading should be within specifications
as reported on the CAL CHECK™ Standard
Certificate. If the value found is out of
specifications, please check that the cuvets
are free of fingerprints, oil or dirt and
repeat validation. If results are still found
out of specifications then recalibrate the
instrument.
CALIBRATION PROCEDURE
Note
: It is possible to interrupt calibration procedure at any time by pressing ON/OFF.
Warning:
do not validate or calibrate the instrument with standard solutions other than the Hanna
CAL CHECK™ Standards, otherwise erroneous results will be obtained. For accurate Validation and
Calibration, please perform test at room temperature: 18 to 25°C (64.5 to 77.0°F).
• Turn the meter on by pressing ON/OFF.
• When the LCD displays “724”, it is ready.
• Enter the
calibration mode
by holding CAL
CHECK
for three seconds
.
• The date of the last calibration appears (e.g.:
month “01”, day “08”). “F.CAL” means that
the factory calibration is selected.
or