10
The flashing digits indicate that:
1) the month can be set
2) the day can be set
“Storage”: this prompt appears for 1 second at the end of the
calibration procedure
, to indicate that the calibration data has
been stored.
“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.
15
or
• Hold READ/TIMER for three seconds. The display
will show the countdown prior to measurement.
Alternatively, wait for:
Free Chlorine:
Total Chlorine:
1 minute
2 minutes and 30 seconds
Then just press READ/TIMER.
In both cases “SIP” will blink during
measurement.
• The instrument directly displays concentration
in mg/L of free or total chlorine on the Liquid
Crystal Display.
or
INTERFERENCES
• Alkalinity:
• Acidity:
• Hardness:
• Bromine (Br
2
):
• Chlorine dioxide (ClO
2
):
• Iodine (I
2
):
• Oxidized Manganese
and Chromium:
• Ozone (O
3
):
above 1,000 mg/L CaCO
3
if present as bicarbonate (HCO
3
-
, sample pH
< 8.3); above 250 mg/L CaCO
3
if present as carbonate (CO
3
2-
,
sample pH > 9.0).
In both cases, it will not reliably develop the full amount of color or it
may rapidly fade (negative error). To resolve this, neutralize the
sample with diluted HCl.
above 150 mg/L CaCO
3
. May not reliably develop the full amount of
color or it may rapidly fade (negative error). To resolve this, neutralize
the sample with diluted NaOH.
in case of water with hardness greater than 500 mg/L CaCO
3
, shake
the sample for approximately 2 minutes after adding the powder
reagent.
positive error.
positive error.
positive error.
positive error.
positive error.
