Rev. 0-401
5
Model GLI-93711 Portable Chlorine Meter
solve this, neutralize the sample with diluted
HCl or NaOH.
In case of water with hardness greater than
500 mg/l CaCO
3
, shake the sample for about
1 minute after adding the reagent.
TIPS FOR AN ACCURATE
MEASUREMENT
The tips listed below should be carefully fol-
lowed during testing to ensure best accuracy:
•
Do not touch the cuvet walls with hands.
•
To maintain the same conditions during
the zeroing and measuring phases, it is
necessary to close the cuvet to prevent
any contamination.
•
Do not let test sample stand too long after
reagent is added or accuracy will be lost.
•
Whenever the cuvet is placed into the
measurement cell, it must be completely
free of fingerprints, oil or dirt. Wipe it thor-
oughly with a lint-free cloth prior to
insertion.
•
It is important that the sample does not
contain any debris. This would corrupt the
readings.
•
It is possible to take multiple readings in a
row, but it is recommended that a zero
reading be taken for each sample and that
the same cuvet is used for zeroing and
measurement.
•
It is important to discard the sample im-
mediately after the reading is taken
because the glass might become perma-
nently stained.
•
Shaking the cuvet can generate bubbles
in the sample, causing higher readings.
To obtain accurate measurements, re-
move such bubbles by swirling or by
gently tapping the vial.
All the reaction times reported in this manual
are referred to 20°C (68°F). As a general
rule, they should be doubled at 10°C (50°F)
and halved at 30°C (86°F).
BATTERY REPLACEMENT
When the battery is low,
"BA" is displayed to indicate
that it must be replaced.
Battery replacement must only take place in a
non-hazardous area. To replace a run-down
battery, simply remove the battery compart-
ment cover on the rear of the meter and
replace the battery, observing correct polarity.
WARRANTY
GLI International, Inc. warrants the Model
GLI-93711 Hand-held/Portable Chlorine Me-
ter to be free from defects in material or
workmanship for a period of one year (12
months) from the date of shipment of this
product from our facility. A warranty claim will
not be honored if defects are not reported
within the warranty period, or if GLI Interna-
tional determines that defects or damages
are due to normal wear, misapplication, lack
of maintenance, abuse, improper installation,
alteration or abnormal conditions. GLI Inter-
national’s obligation under this warranty shall
be limited to, at its option, replacement or re-
pair of this product. The product must be
returned to GLI International, freight prepaid,
for examination. The product must be thor-
oughly cleaned and any process chemicals
removed before it will be accepted for re-
placement or repair. GLI International’s
liability shall not exceed the cost of the prod-
uct. Under no circumstances will GLI
International be liable for any incidental or
consequential damages, whether to person
or property. GLI International will not be liable
for any other loss, damage or expense of any
kind, including loss of profits, resulting from
the installation, use, or inability to use this
product.
