Instruction Manual
HI 93711
Free & Total Chlorine
ISM
w w w . h a n n a i n s t . c o m
This Instrument is in
Compliance with the CE Directives
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
WARRANTY
HI 93711 is warranted for two years
against defects in workman-
ship and materials when used for its intended purpose and maintained
according to instructions.
This warranty is limited to repair or replacement free of charge.
Damages due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of pur-
chase, serial number and the nature of the failure. If the repair is not
covered by the warranty, you will be notified of the charges incurred. If
the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization Number from the Customer Service de-
partment and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protec-
tion.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instru-
ments Inc., Woonsocket, Rhode Island, 02895 , USA.
Dear Customer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information for the correct
operation of the meter. Please read it carefully before using
the meter. If you need additional technical information, do
not hesitate to e-mail us at [email protected].
This instrument is in compliance with directives.
Remove the instrument from the packing material and
examine it carefully to make sure that no damage has
occurred during shipment. If there is any damage, notify
your Dealer.
Each Ion Specific Meter is supplied complete with
• 9V Battery
• Two Sample Cuvets and Caps
• One Transport Cap
Note:
Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing.
PRELIMINARY EXAMINATION
GENERAL DESCRIPTION
The
HI 93711
meter measures the free and total chlorine
(Cl
2
) content in water and wastewater.
The meter uses an exclusive positive-locking system to ensure
that the cuvet is in the same place every time it is placed
into the measurement cell.
The reagents are in liquid and powder form and are
supplied in bottles and in packets. The amount of reagent
is precisely dosed to ensure maximum repeatability.
Display codes aid the user in routine operations.
The meters have an auto-shut off feature that will turn the
instrument off after 10 minutes of non-use.
SPECIFICATIONS
SPECIFICATIONS
Range
Free Cl
2
0.00 to 2.50 mg/L
Total Cl
2
0.00 to 3.50 mg/L
Resolution
0.01 mg/L
Accuracy
±0.03 mg/L ±3% of reading
Typical EMC
±0.01 mg/L
Deviation
Light Source
Light Emitting Diode @ 555 nm
Method
Adaptation of the EPA recommended
DPD method 330.5. The reaction
between the chlorine and the DPD
reagent causes a pink tint in the sample.
Light Detector
Silicon Photocell
Environment
0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type/Life
1 x 9 volt/40 hours
Auto-Shut off
After 10' of non-use
Dimensions
80 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight
290 g (10 oz.).
REQUIRED REAGENTS
POWDER:
Code
Unit
Description Quantity
HI 93701-0 Free Cl
2
DPD
1 packet
HI 93711-0 Total Cl
2
DPD
1 packet
LIQUID:
Code
Unit
Description
Quantity
HI 93701A-T Free and Total Cl
2
DPD1 indicator 3 drops
HI 93701B-T Free and Total Cl
2
DPD1 buffer
3 drops
HI 93701C Total Cl
2
only
DPD3 solution 1 drop
This indicates that the meter is in a
ready state and zeroing can be per-
formed.
Sampling in Progress. This prompt ap-
pears each time the meter is performing
a measurement.
This indicates that the meter is in a
zeroed state and measurement can be
performed.
A zero reading was not taken. Insert a
sample before adding reagent and press
ZERO.
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.
Over range. A flashing value higher than
the maximum concentration readable (see
specifications) indicates that the sample
absorbs too much light, meaning that
the concentration is too high. Dilute the
sample.
Light over range. The cuvet is not in-
serted correctly and an excess ambient
light is reaching the detector. If the cover
is properly installed, then contact your
dealer or the nearest Hanna Customer
Service Center.
Light under range. The zero sample is
too dark for proper zeroing. If this is not
the case, contact your dealer or the
nearest Hanna Customer Service Center.
The "V" indicates that the battery volt-
age is getting low and the battery needs
to be replaced.
This indicates that the battery is dead
and must be replaced.
Note:
once this indication is displayed,
the meter will lockup. Change the bat-
tery to restart.
DISPLAY CODE GUIDE
V
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