Hanna Instruments HI 93701 User Manual

Instruction Manual

HI 93701

Free Chlorine ISM

www.hannainst.com

Warranty

HI 93701 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.

Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.

This Instrument is in

Compliance with the CE Directives

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.

Preliminary Examination

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.

General Description

The HI 93701 portable microprocessor meter measures the free chlorine (Cl2) content in water and wastewater in the

0.00 to 2.50 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 or powder form and are supplied in bottles or 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 Display Code Guide

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.

SPECIFICATIONS

Range 0.00 to 2.50 mg/L Resolution 0.01 mg/L Accuracy ±0.03 mg/L ±3% of reading Typical EMC Deviation ±0.01 mg/L Light Source Light Emitting Diode @ 555 nm Method Adaptation of the EPA recommended

DPD method 330.5. The reaction between free 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 Description Quantity

HI 93701-0 DPD 1 packet

LIQUID:

Code Description Quantity

HI 93701A-F DPD1 Indicator 3 drops HI 93701B-F DPD1 Buffer 3 drops

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 readable concentration (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.

SLIDE

OFF

Operational Guide Tips for an Accurate Measurement

• The instrument directly displays concentration in mg/L of free chlorine on the Liquid Crystal Display.

MEASUREMENT PROCEDURE

• Turn the meter on by pressing ON/OFF.

• When the LCD displays “- - -”, it is ready.

• Fill the cuvet with 10 mL of unreacted sample, up to the mark, and replace the cap.

10 mL

OFF

Liquid reagents procedure

• To an empty cuvet add 3 drops of HI 93701A-F DPD1 indicator, 3 drops of HI 93701B-F DPD1 buffer. Swirl gently to mix and immediately add 10 mL of unreacted sample.

The instruction listed below should be carefully followed during testing to ensure best accuracy.

• Do not touch the cuvet walls with hands.

• In order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvet to prevent any contamination.

• Do not let the test sample stand too long after reagent is added or accuracy will be lost.

• Whenever the cuvet is placed into the measurement cell, it must be completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth

• Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove.

• Press ZERO and “SIP” will appear on the display.

• Replace the cap and shake gently again.

prior to insertion.

• It is important that the sample does not contain any debris. This would corrupt the readings.

• It is possible to take multiple readings in a row, but it is recommended that a zero reading be taken for each sample and that the same cuvet is used for zeroing and

ZERO

• Reinsert the cuvet into the instrument.

measurement.

• It is important to discard the sample immediately after the reading is taken because the glass might become permanently stained.

• Wait for a few seconds and the display will show “-0.0-”. Now the meter is zeroed and ready for measurement.

• Remove the cuvet.

• Wait for 1 minute and then press READ DIRECT. The display will show “SIP” during measurements.

READ

DIRECT

• Shaking the cuvet can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the vial.

• All the reaction times reported in this manual are referred to 20°C (68°F). As a general rule of thumb,

Powder reagent procedure

• Add the content of one packet of

• The instrument directly displays concentration in mg/L of free chlorine on the Liquid Crystal Display.

they should be doubled at 10°C (50°F) and halved at 30°C (86°F).

HI 93701 DPD reagent. Replace the cap and shake gently for 20 seconds (or 2 minutes in case of seawater analysis).

• Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove.

• Wait for 1 minute and press READ DIRECT. The display will show “SIP” during measurements.

INTERFERENCES

Interference may be caused by: Bromine Iodine Chlorine dioxide Ozone Hydrogen peroxide Oxidized Chromium (Cr6+) and Manganese (Mn4+, Mn7+). Alkalinity above 250 mg/L or acidity above 150 mg/L will not reliably develop the full amount of color or it may rapidly fade. To resolve this, neutralize the sample with

Battery Replacement

Battery replacement must only take place in a non-hazardous area using a 9V alkaline battery.

Simply slide off the battery cover on the back of the meter. Detach the battery from the terminals and attach a fresh 9V battery while paying attention to the correct polarity. Replace the battery and the cover.

diluted HCl or NaOH.

READ

DIRECT

In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately 1 minute after adding the powder reagent.

Accessories

REAGENT SETS

HI 93701-F Reagents for 300 tests (liquid) HI 93701-01 Reagents for 100 tests (powder) HI 93701-03 Reagents for 300 tests (powder)

OTHER ACCESSORIES

HI 710009 Blue rubber boot HI 710010 Orange rubber boot HI 721310 9V battery (10 pcs) HI 731318 Tissue for wiping cuvets (4 pcs) HI 731321 Glass cuvets (4 pcs) HI 731325 Caps for cuvets (4 pcs) HI 93703-50 Cuvets cleaning solution (230 mL)

CE Declaration of Conformity

Recommendations for Users

Before using these products, make sure that they are entirely suitable for the environment in which they are used.

Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences.

Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance.

To avoid damages or burns, do not perform any measurement in microwave ovens.

IST93701R4 09/03