Hanna HI 701 Free Chlorine Meter
Introduction
Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. For additional technical information, please contact tech@hannainst.com or view our worldwide contact list at www.hannainst.com.
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
- Six powder reagents for Free Chlorine
- 1 x 1.5V AAA Battery
- Instruction Manual
? For more details about spare parts and accessories, see "Accessories".
Functional Description
The Hanna Checker HI 701 features a compact design with the following components:
- 1. Dust cover
- 2. Cuvette with cap
- 3. Cuvette holder
- 4. Liquid Crystal Display (LCD)
- 5. Button
Technical Specifications
| Parameter | Value |
|---|---|
| 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 | 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5″) |
| Weight | 64 g (2.25 oz.) |
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.
Measurement Procedure
Step 1: Power On
Turn the meter on by pressing the button. All segments are displayed. When the display shows “Add”, “C.1” with “Press” blinking, the meter is ready.
Step 2: Zeroing
Fill the cuvette with 10 mL of unreacted sample and replace the cap. Place the cuvette into the meter and close the meter's cap. Press the button. When the display shows “Add”, “C.2” with “Press” blinking, the meter is zeroed.
Step 3: Reagent Addition
Remove the cuvette from the meter and unscrew the cap. Add the content of one packet of HI 701-25 reagent. Replace the cap and shake gently for 20 seconds. Replace the cuvette into the meter.
Step 4: Measurement
Press and hold the button until the timer is displayed on the LCD (the display will show the countdown prior to the measurement), or, alternatively, wait for 1 minute and press the button.
Step 5: Reading
The instrument directly displays the concentration of free chlorine in ppm. The meter automatically turns off after 2 minutes.
Tips for an Accurate Measurement
- It is important that the sample does not contain any debris.
- Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil and dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion.
- Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.
- Do not let the reacted sample stand for too long after reagent is added, as accuracy will be affected.
- After the reading, it is important to immediately discard the sample, otherwise the glass might become permanently stained.
Battery Management
To save the battery, the instrument shuts down after 2 minutes of non-use. One fresh battery lasts for a minimum of 5000 measurements. When the battery is dead, the instrument will display “bAd” then “bAt” for 1 second and then turns off. To restart the instrument, the battery must be replaced with a new one.
To Replace the Battery:
- Turn the instrument off by holding the button until the meter shuts off.
- Turn the instrument upside down and remove the battery cover with a screwdriver.
- Remove the battery from its location and replace it with a new one, inserting the negative end first.
- Insert the battery cover and replace the screw with a screwdriver.
Accessories
Reagent Sets
- HI 701-25: Reagents for 25 Free Chlorine tests
Other Accessories
- HI 701-11: Free Chlorine Certified Standard Kit
- HI 731318: Cloth for wiping cuvettes (4 pcs.)
- HI 731321: Glass cuvettes (4 pcs.)
- HI 731225: Cuvette black cap for checker HC (4 pcs.)
- HI 731353: Cuvette seal cap for checker HC (4 pcs.)
- HI 740028: 1.5V AAA batteries (4 pcs.)
- HI 93703-50: Cuvette cleaning solution (230 mL)
Recommendations for Users
Before using this product, make sure that it is entirely suitable for your specific application and for the environment in which it is used. Operation of this instrument may cause unacceptable interferences to other electronic equipment, thus requiring the operator to take all necessary steps to correct interferences. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance.
To avoid damage or burns, do not put the instrument in a microwave oven. For the safety of you and the instrument, do not use or store the instrument in hazardous environments.
Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
For Additional Information
Contact your dealer or the nearest Hanna Customer Service Center. To find a Hanna Office in your area, visit our web site: www.hannainst.com.
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