Hanna Instruments HI 9811-5 User manual

1
Instruction Manual
HI 9811-5
Portable
pH/EC/TDS/°C Meters
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

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Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the meter.
This manual will provide you with the necessary information for
correct use of the instrument, as well as a precise idea of its versatility.
WARRANTY .................................................................................. 2
PRELIMINARY EXAMINATION ........................................................ 3
GENERAL DESCRIPTION ................................................................ 3
FUNCTIONAL DESCRIPTION .......................................................... 4
SPECIFICATIONS........................................................................... 5
OPERATIONAL GUIDE ................................................................... 6
pH CALIBRATION ......................................................................... 8
pH VALUES AT VARIOUS TEMPERATURES ................................... 10
EC/TDS CALIBRATION ................................................................. 11
EC/TDS CONVERSION FACTOR..................................................... 11
BATTERY REPLACEMENT .............................................................. 12
PROBE MAINTENANCE ................................................................ 13
ACCESSORIES ............................................................................. 14
HI 9811-5 is guaranteed for two years against defects in workmanship
and materials when used for their intended purpose and maintained
according to instructions. Electrodes and probes are guaranteed for six
months. 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 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 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 Returned 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.
WARRANTYWARRANTY
WARRANTY
WARRANTY
WARRANTY
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS

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All rights are reserved. Reproduction in whole or in part is prohibited without the written
consent of the copyright owner.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipment.
If noticeable damage is found, notify your Dealer.
Each meter is supplied with:
•HI 1285-5, pH/EC/TDS/°C combination probe with 8-pin DIN
connector and 1 m (3.3') cable
•HI 70007, pH 7.01 sachet, 1 pc
•HI 70031, 1413 µS/cm sachet, 1 pc
•HI 70032, 1382 ppm (mg/L) sachet, 1 pc
•HI 700661 cleaning solution sachet, 2 pcs
•Instruction manual
•1 x 9V alkaline battery.
Note:Save all packing material until you are sure that the
instrument functions correctly. Any defective item must be
returned in the original packing together with the supplied
accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
HI 9811-5 is the complete, versatile, with a large LCD and splash-
proof portable combination meter designed with the utmost precision
and simplicity. The instrument provides measurements for pH, EC and
TDS ranges, which are easily selectable through the keypad on the
front panel.
Conductivity measurements are automatically compensated for
temperature changes with a built-in temperature sensor. The
temperature coefficient is fixed at 2%/°C.
HI 9811-5 is a pH/EC/TDS meter designed for simplicity of use in
taking pH, µS/cm, mg/L and temperature measurements. Suited for
hydroponics, greenhouses, farming and ground water applications.

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1) 8-pin DIN connector for probe
2) Liquid Crystal Display
3) pH range selection key
4) µS/cm (EC) range selection key
5) mg/L (TDS) selection key
6) pH offset calibration knob
7) EC/TDS calibration knob
8) °C (Temperature) selection key
9) On/Off key
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION

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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS

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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 observing 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.
Always remove the electrode protective cap before taking any
measurements and make sure the meter has been calibrated before
taking any measurements.
Turn the meter on by pressing the On/Off key.
TAKING pH MEASUREMENTS
If the probe has been left dry, soak the tip in HI 70300 storage
solution for 30 minutes to reactivate it.
•To take a pH measurement simply
submerge the tip (4cm/1½") of the
probe into the sample to be tested.
•Select the pH mode.
•Stir briefly and wait a couple of
minutes for the reading to adjust
and stabilize. The display shows
the pH value.
•If measurements are taken in different samples successively, it is
recommended to rinse (clean) the probe thoroughly to eliminate
cross-contamination. 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.
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE

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•Select the appropriate measurement range (EC or TDS).
•Wait a couple of minutes for the temperature sensor to reach
thermal equilibrium. The display will then show the measurement
automatically temperature compensated for temperature with the
appropriate indication among the following:
“µS”symbol indicates the meter
is in EC mode;
“mg/L” symbol indicates the meter
is in TDS mode.
TAKING TEMPERATURE MEASUREMENTS
•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. The display shows the
temperature value.
Notes:•If the display shows only a “E”
on the right side of the LCD,
the reading is out of range.
•It is recommended to clean
often the probe with HI 700661
Cleaning Solution.
•After measurements have been completed, the instrument
should be switched off, and the probe cleaned and covered
with the protective cap.

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For greatest accuracy, frequent calibration of the instrument is
recommended. The instrument should be recalibrated for pH:
a) Whenever the electrode is replaced.
b) At least once a month.
c) After testing aggressive chemicals.
d) Where extreme accuracy is required.
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 NIST standards, use pH 6.86 (HI 7006)
instead of pH 7.01 and pH 9.18 (HI 7009) instead of pH 10.01.
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:
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).
•The pH calibration is now complete.
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION

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Notes:• The probe should be submerged approximately 4 cm
(1½") into the solution. The thermometer has to be close to
the probe.
•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.

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For temperature compensation during calibration, please refer to the
following chart.
For instance, if the buffer temperature is 25°C, the display should
show pH 4.0 or 7.0 or 10.0.
If the buffer temperature is 10°C, the display should show pH 4.0 or
7.0 or 10.1.
PMET SEULAVHp
Cº Fº 10.4 68.6 10.7 81.9 10.01
0 23 10.4 89.6 31.7 64.9 23.01
5 14 00.4 59.6 01.7 93.9 42.01
01 05 00.4 29.6 70.7 33.9 81.01
51 95 00.4 09.6 50.7 72.9 21.01
02 86 00.4 88.6 30.7 22.9 60.01
52 77 10.4 68.6 10.7 81.9 10.01
03 68 20.4 58.6 00.7 41.9 69.9
53 59 30.4 48.6 99.6 11.9 29.9
04 401 40.4 48.6 89.6 70.9 88.9
54 311 50.4 38.6 89.6 40.9 58.9
05 221 60.4 38.6 89.6 10.9 28.9
55 131 80.4 48.6 89.6 99.8 97.9
06 041 90.4 48.6 89.6 79.8 77.9
56 941 11.4 48.6 99.6 59.8 67.9
07 851 21.4 58.6 99.6 39.8 57.9
pp
pp
pH VALUES AT VARIOUS TEMPERATURESH VALUES AT VARIOUS TEMPERATURES
H VALUES AT VARIOUS TEMPERATURESH VALUES AT VARIOUS TEMPERATURES
H VALUES AT VARIOUS TEMPERATURES