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Manual abstract: user guide HANNA INSTRUMENTS HI 9813-0
Detailed instructions for use are in the User's Guide.
[. . . ] This warranty is limited to repair or replacement free of charge. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. [. . . ] After cleaning, it is recommended to rinse the probe with some of the next sample to be measured.
TAKING EC/TDS MEASUREMENTS
· Immerse the tip of the probe (4cm/1½") into the sample to be tested. If possible, use plastic beakers or containers to minimize any EMC interference. · Tap the probe lightly on the bottom of the beaker to remove any air bubbles which may be trapped inside the tip.
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· Select the appropriate measurement range (EC or TDS).
pH CALIBRATION
For greatest accuracy, frequent calibration of the instrument is recommended. The instrument should be recalibrated for pH: a) Whenever the electrode is replaced. e) Whenever the CAL-CHECK test fails (HI 9813-6 only).
· Wait for a couple of minutes for the temperature sensor to reach thermal equilibrium. The display then shows the measurement automatically compensated for temperature with the appropriate following indication: "mS" tag indicates the meter is in EC mode, while no symbol indicates the meter is in TDS mode.
PREPARATION
Pour small quantities of pH 7. 01 (HI 7007) or pH 4. 01 (HI 7004) or pH 10. 01 (HI 7010) solution into a clean beaker. To obtain accurate readings, use pH 7. 01 (HI 7007) if you are going to measure neutral or close to neutral samples, pH 4. 01 (HI 7004) if you are going to measure acidic samples or pH 10. 01 (HI 7010) for alkaline measurements. If you need to calibrate to NBS standards, use pH 6. 86 (HI 7006) instead of pH 7. 01 and pH 9. 18 (HI 7009) instead of pH 10. 01.
TAKING TEMPERATURE MEASUREMENTS (not for HI 9813-0)
· Submerge the tip (4cm/1½") of the probe into the sample to be tested. · Stir briefly and wait a couple of minutes for the reading to adjust and stabilize. The display shows the temperature value.
PROCEDURE
· Connect the probe and switch the meter on, then press the "pH" key to display pH measurement. · Remove the protective cap from the probe, rinse and immerse it in the buffer and stir gently. 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 9813-0, with a ChecktempC (or another accurate thermometer); for HI 9813-5 and HI 9813-6, select the °C mode and read the displayed value. · Adjust the pH calibration knob until the LCD shows the pH value at the above temperature (see the pH versus temperature chart).
Note: If the display shows only a "1" on the far left hand side, the reading is out of range. Note: It is recommended to clean often the probe with HI 700661 Cleaning Solution. Note: After measurements have been completed, the instrument should be switched off, and the probe cleaned and covered with the protective cap.
· The pH calibration is now complete.
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.
EC/TDS CALIBRATION
Accessories needed: · Use HI 70031 (1413 µS/cm = 1. 413 mS/cm) EC calibration solution or HI 70442 (1500 ppm) TDS calibration solution. Note: The conversion between EC and TDS is made by a built-in circuit, hence it is requested to calibrate the meter only in EC or TDS range. The other range is thus automatically calibrated.
pH VALUES AT VARIOUS TEMPERATURES
For temperature compensation during calibration, please refer to the following chart. [. . . ] (03) 3258. 9565 · Fax (03) 3258. 9567
Korea:
Tel. (02) 2278. 5147 · Fax (02) 2264. 1729
Malaysia:
Tel. (603) 5638. 9940 · Fax (603) 5638. 9829
Singapore:
Tel. 6296. 7118 · Fax 6291. 6906
South Africa:
Tel. [. . . ]
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