Hanna Instruments HI 701 - User Manual

Free Chlorine
Preliminary examination:
Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occurred during shipment, please notify your Dealer.
Each HI 701 meter is supplied complete with:
• Two Sample Cuvettes and Caps
• HI 701-25 Reagents for 25 tests
• 1 x 1.5V AAA Battery
• Instruction Manual and Quick Reference
HI 701
Technical specifications:
Range 0.00 to 2.50 ppm
Resolution 0.01 ppm
Accuracy ±0.03 ppm ±3% of reading @ 25 °C / 77 °F
Light Source Light Emitting Diode @ 525 nm
Light Detector Silicon Photocell
Method Adaptation of USEPA method 330.5. The reaction
between free chlorine and the DPD reagent causes a
pink tint in the sample.
Environment 0 to 50 °C (32 to 122 °F);
max 95% RH non-condensing
Battery Type 1 x 1.5V AAA
Auto-Shut off After 2 minutes of non-use
Dimensions 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight 64 g (2.3 oz.)
Functional description:
Errors and warnings:
Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.
Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.
Inverted Cuvettes: The sample and the zero cuvette are inverted.
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 cuvette for reference (zero) and measurement.
Over Range: A flashing value of the maximum concentration indicates
the reading is over range. Dilute the sample and re-run the test.
Battery Low: The battery must be replaced soon.
Dead Battery: This indicates that the battery is dead and must be
replaced. Once this indication is displayed, normal operation of the
instrument will be interrupted. Change the battery and restart the
meter.
1. Dust cover.
2. Cuvette with cap.
3. Cuvette holder.
4. Liquid Crystal Display.
5. Button.
For more details about spare parts and accessories
see “Accessories”.
www.hannainst.com
Dear Customer,
Thank you for choosing a Hanna Instruments Product.
Please read this instruction manual carefully before using the instrument. If you need
additional technical information, do not hesitate to e-mail us at tech@hannainst.com
or view our worldwide contact list at www.hannainst.com.
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Hanna Instruments HI 701 Specifications

General

Range (ppm)	0.00 to 2.50 ppm
Resolution (ppm)	0.01 ppm
Light Source	LED @ 525 nm
Light Detector	Silicon photocell
Auto-off	After 10 minutes of non-use
Environment	0 to 50°C (32 to 122°F); max 95% RH non-condensing
Temperature Compensation	Automatic
Battery Type	1.5V AAA
Power Supply	Battery
Dimensions	81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
Weight	64 g (2.25 oz.)

Summary

Functional Description

Dust Cover

Protects the instrument lens when not in use.

Cuvette with Cap

Used to hold the sample for measurement.

Cuvette Holder

Secures the cuvette within the measurement chamber.

Liquid Crystal Display

Displays measurement results, error messages, and status indicators.

Button

Controls instrument operation, including power and measurement initiation.

Technical Specifications

Range

Specifies the measurement range from 0.00 to 2.50 ppm.

Resolution

Indicates the smallest detectable change in measurement, 0.01 ppm.

Accuracy

Defines the measurement precision: ±0.03 ppm ±3% of reading.

Method

Based on USEPA method 330.5 using DPD reagent for free chlorine.

Environment

Operational conditions: 0 to 50 °C, max 95% RH non-condensing.

Battery Type

Uses a single 1.5V AAA battery.

Errors and Warnings

Light High

Indicates too much light for measurement; check zero cuvette preparation.

Light Low

Indicates insufficient light; check zero cuvette preparation.

Inverted Cuvettes

Occurs when the sample and zero cuvettes are swapped.

Under Range

Sample absorbs less light than reference; check procedure and cuvette use.

Over Range

Reading exceeds maximum; dilute sample and re-test.

Battery Low

Indicates the battery needs replacement soon.

Dead Battery

Battery is depleted; normal operation is interrupted. Replace battery.

Measurement Procedure

Turning On and Zeroing

Turn meter on, wait for 'Add', 'C.1' prompt, fill cuvette, and press button to zero.

Sample Preparation

Fill cuvette with sample, add reagent, mix, and place into meter.

Measurement Initiation

Press and hold button for timer display or wait for auto-shutoff.

Tips for Accurate Measurement

Sample Integrity

Ensure sample is free of debris and bubbles for precise readings.

Cuvette Handling

Keep cuvette exterior clean and free of fingerprints before insertion.

Reagent Reaction Time

Do not let reacted sample stand too long; process immediately for accuracy.

Battery Management

Auto-Shut Off

Instrument shuts down after 2 minutes of non-use to save battery.

Battery Replacement

Turn off, unscrew cover, replace battery, reassemble with screwdriver.