Hanna Instruments HI 93735 User Manual

Hanna Instruments Measuring instruments

Instruction Manual

HI 93735

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

HI 93735 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

• Instruction Manual

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 93735 meter measures the total hardness in drink-
ing, surface 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

Range

0 to 250 ppm

MR 200 to 500 ppm
HR 400 to 750 ppm

Resolution

1 ppm from 0 to 100 ppm
5 ppm from 100 to 750 ppm

Accuracy

LR ±5 ppm or ±4% of reading,

whichever is greater
MR ±7 ppm or ±3% of reading,

whichever is greater
HR ±10 ppm or ±2% of reading,

whichever is greater

Typical EMC Deviation ±5 ppm
Light Source

Light Emitting Diode @ 470 nm

Method

Adaptation of the EPA recommended

method 130.1. The reaction between cal-

cium, magnesium and the reagents causes

a red-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 93735A-LR Hardness Indicator reagent LR 9.5mL/test

HI 93735A-MR Hardness Indicator reagent MR 9.5mL/test

HI 93735A-HR Hardness Indicator reagent HR 9.5mL/test

HI93735B

Hardness Buffer reagent

2 drops

HI93735C

Fixing Reagent

1 packet

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.
Under range. A flashing value lower
than the minimum concentration read-
able (see specifications) 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 "LOW BATTERY" indicates that the
battery voltage is getting low and the
battery needs to be replaced.

DISPLAY CODE GUIDE

REAGENT SETS

HI 93735LR Reagents for 100 tests LR (0 to 250 ppm)
HI 93735MR Reagents for 100 tests MR (200 to 500 ppm)
HI 93735HR Reagents for 100 tests HR (400 to 750 ppm)
HI 93735-0 Reagents for 100 tests (0 to 750 ppm)