Hanna Instruments HI 9813-6N User Manual

HI 9813-6 pH/EC/TDS/°C meter

with Clean & Cal procedure

Quick Reference Guide

TAKING MEASUREMENTS

• Connect the HI 1285-6 probe and switch the meter ON.

• Submerge the probe into the sample to be tested.

• Select the desired measurement range (pH, mS/cm, ppm, °C)
by pressing the correspondent key.

Note: If the display shows only a “1”, the

meter is out of range.

• Wait for a couple of minutes for reaching
the thermal equilibrium before taking any
measurements.

• After use switch off the instrument, clean and cover the probe
with the protective cap.

Note: It is recommended to clean often the probe with HI 700661

Cleaning Solution.

BATTERY REPLACEMENT

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.
Unscrew the three screws on the rear of the meter, remove the
battery compartment cover and replace the 9V alkaline battery
with a new one while observing its polarity.
Make sure the battery contacts are tight and secure before
replacing the cover.

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CALIBRATION PROCEDURE

• Connect the probe and switch the meter ON.

• Immerse the probe in the calibration solution.

• pH calibration: use HI 7007 (pH 7.01) buffer if you are
going to measure neutral or close to neutral samples, HI 7004
(pH 4.01) if you are going to measure acidic samples or

HI 7010 (pH 10.01) for alkaline measurements.

Note: If you need to calibrate to NBS standards, use HI 7006

(pH 6.86) instead of HI 7007 and HI 7009 (pH 9.18)
instead of HI 7010.

• EC or TDS calibration: use HI 70031 (1.41 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.

• Press °C and record the temperature of the calibration solution.

• Adjust the pH or the EC/TDS knob to display the solution
value at the measured temperature (refer to the tables “pH
vs. temperature” or “Conductivity vs. temperature” on the
solution packet).

CAL-CHECK™ FEATURE / CLEAN & CAL PROCEDURE

• Rinse the probe with water and immerse it in HI 50021 Check
Solution.

Note: If the reading is around pH 4.0, the probe is broken and

has to be replaced.

• Press the Check key: if the message “Probe is OK” appears,
the meter is calibrated; if the message “Clean Probe and
Calibrate” appears, cleaning is needed:

1. immerse the probe in HI 700661 Cleaning Solution for 5
minutes, then rinse it with tap water;

2. immerse again in HI 50021 Check Solution and press the
Check key: if the message “Probe is OK” appears, the
meter does not need calibration; if the message “Clean

Probe and Calibrate” appears, calibration is needed.

Note: If it is not possible to calibrate, the probe has to be

replaced with a new one.

QR9813-6N 01/10