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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.
3. SPECIFICATIONS Range 0.00 to 3.00 mg/L (as NH ‑N) Resolution 0.01 mg/L Ammonia Accuracy ±0.04 mg/L ±4% of reading at 25 °C Low Range Adaptation of the ASTM Manual of Water Method and Environmental Technology, D1426 Nessler method Light source Light Emitting Diode Bandpass filter 420 nm...
5. DESCRIPTION 5.1. GENERAL DESCRIPTION AND INTENDED USE HI97700 is an auto‑diagnostic portable meter that benefits from Hanna’s years of experience as a manufacturer of analytical instruments. It has an advanced optical system that uses a Light Emitting Diode (LED) and a narrow band interference filter that allows for accurate and repeatable readings.
5.2. FUNCTIONAL DESCRIPTION 1) ON/OFF power button 3) Liquid Crystal Display (LCD) 5) Indexing mark 2) Keypad 4) Cuvette holder 6) Battery cover Keypad Description The keypad contains 3 direct keys and 3 functional keys with the following functions: Press the functional keys to perform the function displayed above them on the LCD. Press and hold to power off/on.
5.3. PRECISION AND ACCURACY Precision is how closely repeated measurements are to one another. Precision is usually expressed as standard deviation (SD). Accuracy is defined as the closeness of a test result to the true value. Although good precision suggests good accuracy, precise results can be inaccurate.
5.5. OPTICAL SYSTEM Instrument Block Diagram The internal reference system (reference detector) of the HI97700 photometer compensates for any drifts due to power fluctuations or ambient temperature changes, providing a stable source of light for your blank (zero) measurement and sample measurement.
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To perform a CAL Check: 1. Press CAL Check key from measurement mode. The “Not Available“ message or the date/time and status of the last CAL Check will be displayed on the screen. 2. Press the Check key to start a new CAL Check. Press the key at any time to abort the validation process.
‑ “OUT OF SPECIFICATION“: A user calibration is not allowed, the measured value is outside of the toler‑ ance window. Check the certified value, expiration date and clean the outside of the cuvette. Repeat the CAL Check procedure. If this error continues contact your nearest Hanna Customer Service Center.
Use the functional keys to highlight a log and press Info to view additional information about the log. From this screen the Next and Previous keys can be used to view other logs. Use the Delete key to erase logged data. After pressing Delete a prompts on display is asking for confirmation.
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Date / Time Press the Modify key to change the date/time. Press the keys to highlight the value to be modified (year, month, day, hour, minute or second). Press Edit to modify the highlighted value. Use the keys to change the value. Press the Accept key to confirm or the key to return to the previous screen.
Beeper Option: Enable or Disable When enabled, a short beep is heard every time a key is pressed. A long beep alert sounds when the pressed key is not active or an error is detected. Press the functional key to enable/disable the beeper. Tutorial Option: Enable or Disable When enabled, the user will be guided step‑by‑step...
6.7. CONTEXTUAL HELP HI97700 offers an interactive contextual help mode that assists the user at any time. To access the help screen press the key. The instrument will display additional information related to the current screen. To read all the available information, scroll the text using the ...
7.2. CUVETTE PREPARATION Proper mixing is very important for reproducibility of the measurements. Invert the cuvette a couple of times or for a specified time: hold the cuvette in the vertical position. Turn the cuvette upside‑down and wait for all of the solution to flow to the cap end, then return the cuvette to the upright vertical position and wait for all of the solution to flow to the cuvette bottom.
8. METHOD PROCEDURE REQUIRED REAGENTS Code Description Quantity HI93700A‑0 Ammonia Low Range Reagent A 4 drops HI93700B‑0 Ammonia Low Range Reagent B 4 drops REAGENT SETS HI93700‑01 Ammonia LR Reagent ‑ 100 tests HI93700‑03 Ammonia LR Reagent ‑ 300 tests For other accessories see page 22.
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• Add 4 drops of HI93700A‑0 Ammonia Low Range Reagent A. Replace the plastic stopper and the cap. Invert 5 times to mix. • Add 4 drops of HI93700B‑0 Ammonia Low Range Reagent B. Replace the plastic stopper and the cap. Invert 5 times to mix.
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• Press and use the keys to select Chemical Form. • Press Select to change the displayed chemical form to mg/L of ammonia (NH and ammonium (NH INTERFERENCE Interference may be caused by: Acetone Alcohols Aldehydes Glycine Hardness above 1 g/L Iron Organic chloramines Sulfide...
9. ERROR DESCRIPTIONS The instrument shows clear warning messages when erroneous conditions appear and when measured values are outside the expected range. These messages are described below. No Light: The light source is not functioning properly. Light Leak: There is an excess amount of ambient light reaching the detector.
10. BATTERY REPLACEMENT To replace the instrument’s batteries, follow these steps: • Turn the instrument off by pressing and holding the key. • Remove the battery cover by turning it counterclockwise. • Remove the old batteries, replace them with three new 1.5V AA batteries. •...
(engraved on the bottom of the meter) and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the meter is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid.
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World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com Local Office Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Phone: 800.426.6287 Fax: 401.765.7575 e‑mail: tech@hannainst.com MAN97700...
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