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Instruction Manual

HI 93704

Hydrazine ISM

w w w . h a n n a i n s t . c o m

This Instrument is in

Compliance with the        Directives

HI 93704 is warranted for two years 

against defects in

workmanship 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

purchase, 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 department and then send it with shipment costs

prepaid. When shipping any instrument, make sure it is properly

packaged for complete protection.
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 Instruments
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 the   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.

The 

HI 93704

 meter measures the hydrazine content in

boiler water/feedwater, water and seawater in the 0 to
400 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 reagent is in liquid form and is supplied in bottles. 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

Range

0 to 400 µg/L

Resolution

1 µg/L

Accuracy

±3% of full scale

Typical EMC

±2 µg/L

Deviation
Light Source

Light Emitting Diode @ 470 nm

Method

Adaptation of the ASTM Manual of Water

and Environmental Technology, method

D1385-88 for natural and treated

water. The reaction between hydrazine

and the liquid reagent causes a yellow

tint in the sample

Light Life

Life of the instrument

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 REAGENT

Code

Description

Quantity

HI  93704-0

Liquid Reagent

2x12 drops

REAGENT SETS

HI 93704-01

Reagents for 100 tests

HI 93704-03

Reagents for 300 tests

Warranty

General Description

Specifications

Preliminary Examination

This indicates that the meter is in a
ready state and zeroing can be
performed.
Sampling in Progress. This prompt
appears 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" 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
inserted 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
voltage 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 battery to restart.

Display Code Guide

HANNA instruments®

 reserves the right to modify the design,

construction and appearance of its products without advance notice.

IST93704R4

02/07

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