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Table of Contents
- 1 Table of Contents
- 2 Preliminary Examination
- 3 General Description
- 4 Functional Description
- 5 Specifications
- 6 Operational Guide
- 7 Ph CALIBRATION
- 8 Ph VALUES at VARIOUS TEMPERATURES
- 9 Ec/Tds Calibration
- 10 Ec/Tds Conversion Factor
- 11 Battery Replacement
- 12 Probe Maintenance
- 13 Accessories
- 14 Ce Declaration of Conformity
- Download this manual
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Table of Contents
Related Manuals for Hanna Instruments HI 9812
Summary of Contents for Hanna Instruments HI 9812
- Page 1 Instruction Manual HI 9812 & HI 9812-5 Portable pH/EC/TDS/°C Meters These Instruments are in w w w . h a n n a i n s t . c o m Compliance with the CE Directives www.ponpe.com sale@ponpe.com...
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Page 2: Table Of Contents
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 shipping costs prepaid. -
Page 3: Preliminary Examination
• HI 9812 is a pH/EC/TDS meter designed for simplicity of use in taking pH, µS/cm and ppm measurements. Suited for hydro- ponics, greenhouses, farming and ground water applications. • HI 9812-5 offers all the features of HI 9812 with the addition of temperature measurement in the °C scale. www.ponpe.com... -
Page 4: Functional Description
2) Liquid Crystal Display 3) pH range selection key 4) µS/cm (EC) range selection key 5) EC/TDS calibration knob 6) pH offset calibration knob 7) ppm (TDS) selection key 8) °C (Temperature) selection key, for HI 9812-5 only 9) ON/OFF key www.ponpe.com sale@ponpe.com... -
Page 5: Specifications
SPECIFICATIONS Range 0.0 to 14.0 0 to 1990 µS/cm 0 to 1990 °C 0 to 60 (HI 9812-5 only) Resolution µS/cm °C 1 (HI 9812-5 only) Accuracy ±0.1 (@20°C/68°F) ±2% f.s. µS/cm ±2% f.s. °C ±1 (HI 9812-5 only) Conversion Factor Typical EMC ±0.1... -
Page 6: Operational Guide
OPERATIONAL GUIDE INITIAL PREPARATION Each meter is supplied complete with a 9V battery. Remove the battery compartment cover on the back of the meter and install the battery while paying attention to its polarity. Connect the probe to the DIN socket on the top of the meter by aligning the pins with the socket and pushing in the plug. - Page 7 EC mode; no symbol indicates the meter is in TDS mode. TAKING TEMPERATURE MEASUREMENTS (for HI 9812-5 only) • Submerge the tip (4cm/1½") of the probe into the sample to be tested. • Select the °C mode. • Stir briefly and wait a couple of minutes for the reading to adjust and stabilize.
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Page 8: Ph Calibration
Wait a couple of minutes for the reading to stabilize. • Take the temperature of the buffer solution, e.g. 10.0°C, as follow: for HI 9812, with a ChecktempC (or another accurate thermometer); for HI 9812-5, select the °C mode and read the displayed value. -
Page 9: Ph Values At Various Temperatures
Note: The probe should be submerged approximately 4 cm (1½") into the solution. The ChecktempC thermometer has to be located close to the probe. Note: If turning the knob the needed value can not be reached, clean the probe (see the "Probe Maintenance" section). If also after the probe cleaning the value can not be reached, replace the probe. -
Page 10: Ec/Tds Calibration
The TDS value in aqueous solutions is directly proportional to the conductivity. The ratio between the two parameters depends on the solution. Both HI 9812 and HI 9812-5 models have a fixed conversion factor set to 0.5. This means that 1 µS/cm is equal to 0.5 ppm of TDS. www.ponpe.com... -
Page 11: Battery Replacement
BATTERY REPLACEMENT These meters are powered by a 9V battery that is located on the rear of the instrument. When the battery level is so low that it may cause unreliable measurements, the meter turns off. It is recommended to replace the battery immediately. Battery replacement must only take place in a nonhazardous area using a 9V alkaline battery. -
Page 12: Probe Maintenance
PROBE MAINTENANCE PERIODIC MAINTENANCE Inspect the probe and the cable. The cable used for the connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the probe stem or bulb. Connector must be perfectly clean and dry. -
Page 13: Accessories
Oil & Fat Cleaning Solution, 500 mL bottle OTHER ACCESSORIES CHECKTEMPC Electronic thermometer (-50.0 to 150.0°C) HI 710001 Soft carrying case HI 710031 Rugged carrying case Hanna Instruments reserves the right to modify the design, construc- tion and appearance of its products without advance notice. www.ponpe.com sale@ponpe.com... -
Page 14: Ce Declaration Of Conformity
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 areas could cause unacceptable interferences to radio and TV equipment. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. - Page 15 You can also e-mail us at: tech@hannainst.com All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., 584 Park East Drive, Woonsocket, Rhode Island, 02895 , USA.
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