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Instruction Manual

HI 93719

Magnesium Hardness

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 93719 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

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 93719

 meter measures the magnesium hardness

content, as CaCO

3

, in water and wastewater in the 0.00 to

2.00 mg/L (ppm) 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 liquid form and are supplied in bottles.

The amount of reagent is precisely dosed to ensure maxi-

mum 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

0.00 to 2.00 mg/L

Resolution

0.01 mg/L

Accuracy

±0.11 mg/L ±5% of reading

Typical EMC

±0.02 mg/L

Deviation
Light Source

Light Emitting Diode @ 555 nm

Method

Adaptation of the 

Standard Methods for

the Examination of Water and Wastewa-
ter, 18

th

 edition, 

EDTA colorimetric method.

The reaction between Mg and reagents

causes a violet 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  93719

A

-0

Mg indicator

0.5 mL

HI  93719

B

-0

Alkali solution

0.5 mL

HI  93719

C

-0

EDTA solution

1 drop

HI  93719

D

-0

EGTA solution

1 drop

REAGENT SETS

HI 93719-01

Reagents for 100 tests

HI 93719-03

Reagents for 300 tests

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

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