Instruction Manual
HI 93749
Chromium VI Low
Range ISM
http://www.hannainst.com
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
WARRANTY
WARRANTY
WARRANTY
WARRANTY
HI 93749 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 tech@hannainst.com.
This instrument is in compliance with directives
EN 50081-1 and EN 50082-1.
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
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The
HI 93749
meter measures the hexavalent chromium (Cr
VI) content in water and wastewater in the 0 to 300 µg/
L (ppb) range.
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 powder form and are supplied 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
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
Range
0 to 300 µg/L
Resolution
1 µg/L
Accuracy
±1 µg/L ±4% of reading
Typical EMC
±1 µg/L
Deviation
Light Source
Light Emitting Diode @ 555 nm
Method
Adaptation of the
ASTM Manual of Water
and Environmental Technology, D1687-
92
, diphenyl-carbohydrazide method. The
reaction between chromium VI and the
reagent causes a purple 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
180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight
290 g (10 oz.).
REQUIRED REAGENTS
Code
Description
Quantity
HI 93749-0
Powder reagent 1 packet
REAGENT SETS
HI 93749-01
Reagents for 100 tests
HI 93749-03
Reagents for 300 tests
READ TIMED
ZERO
CUVET HOLDER
CUVET
ALIGNMENT INDICATOR
ON/OFF
READ DIRECT
ins
e
rum n s
ON
OFF
ZERO
READ
DIRECT
READ
TIMED
HI 93749
CHROMIUM VI
LOW RANGE
Range: 0 to 300 ppb
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
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDE
V
