HANNA instruments HI770 Silica High Range Instruction Manual

: June 17, 2024
: HANNA instruments

Table of Contents

HI770 Silica High Range
Preliminary Examination
Specifications
Functional Description
Errors and Warnings
Measurement Procedure
Tips for an Accurate Measurement
Battery Management
Recommendations for Users
Accessories
Warranty
References
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HI770 Silica High Range

INSTRUCTION MANUAL
HI770
**Silica High Range

**

Thank You
Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instrument.
For more information about Hanna Instruments and our products, visit www.hannainst.com.
For technical support, contact your local Hanna Instruments Office or e-mail us at tech@hannainst.com.
Find your local Hanna Instruments Office on 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 contact your local Hanna Instruments Office.
Each HI770 meter is supplied complete with:

Sample Cuvettes and Caps (2 pcs.)
Reagents for 6 tests
1.5V AAA Battery (1 pc.)
Instruction Manual and Quick Reference Guide

Specifications

Range	0 to 200 ppm
Resolution	1 ppm
Accuracy	±2 ppm ±5% of reading @25 °C/77 °F
Light Source	Light Emitting Diode @470 nm
Light Detector	Silicon Photocell
Method	Adaptation of the USEPA method 370.1 and Standard Method 4500-SiO C.
Environment	0 to 50 °C (32 to 122 °F); max 95% RH non-condensing
Battery Type	1.5V AAA (1 pc.)
Auto-Shut off	After 10 minutes of non-use and 2 minutes after reading
Dimensions	86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight	52 g (1.84 oz.)

Functional Description

HANNA instruments HI770 Silica High Range - Cuvette
holder

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” 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

Fill both cuvettes with 10 mL of unreacted sample. Replace the cap on one of the cuvettes, this is the zero.
To the second cuvette add one packet of HI770A-25 reagent. Replace the cap and shake gently until the reagent is completely dissolved.
Unscrew the cap and add one packet of HI770B-25 reagent. Replace the cap and shake vigorously until the reagent is completely dissolved. Wait 10 minutes.
Unscrew the cap and add one packet of HI770C-25 reagent. Replace the cap and shake gently until the reagent is completely dissolved.
Wait 2 minutes.
Duringthe two minute reaction time. Turn the meter on by pressing the button. All segments will be displayed. When the display shows “Add”, “C.1” with “Press” blinking, the meter is ready.
Place the first cuvette (unreacted) 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.
After the two minute reaction time, place the second cuvette (reacted) into the meter and close the meter’s cap. Press the button.
The instrument directly displays the concentration in ppm of silica on the LCD. To convert the reading to ppm silicon (Si) multiply the reading by 0.467. The meter automatically turns off after 2 minutes.

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

Tips for an Accurate Measurement

Itis 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 HI731318 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 10 minutes of non-use and 2 minutes after reading.
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 instrument’s 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.

Recommendations for Users

Before using Hanna Instruments products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. Operation of these instruments may cause unacceptable interferences to other electronic equipment, thus requiring the operator to take all necessary steps to correct such interferences. Any variation introduced by the user to the supplied equipment may degrade the instrument’s EMC performance. To avoid damages or burns, do not put the instrument in microwave oven. For yours and the instrument safety do not use or store the instrument in hazardous environments.

Accessories

Reagent Sets

HI770-25	Reagents for 25 Silica High Range tests

Other Accessories
HI770-11| Silica HR Certified Standard Kit
HI731225| Cuvette Black Cap for Checker ® HC Colorimeters (4 pcs.)
HI731318| Cloth for wiping cuvettes (4 pcs.)
HI731321| Glass Cuvettes and Seal Cap for Checker ® HC Colorimeters (4 pcs.)
HI731353| Cuvette Seal Cap for Checker ® HC Colorimeters (4 pcs.)
HI740028P| 1.5V AAA batteries (12 pcs.)
HI93703-50| Cuvette cleaning solution (230 mL)

Warranty

HI770 is warranted for a period of one year after date of purchase against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number 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 instrument is to be returned to Hanna Instruments, first obtain a Return Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for complete protection.

IST770 05/18