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

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The TDS value in aqueous solutions is directly proportional to the
conductivity. The ratio between the two parameters depends on the
solution.
HI 9811-5 model hasa fixed conversion factor set to 0.5. This
means that 1 µS/cm is equal to 0.5mg/L of TDS.
Accessories needed:
•Use HI 70031 (1413 µS/cm) EC calibration solution or
HI 70032 (1382 ppm, or mg/L) 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.
PROCEDURE
•Pour approximately 4 cm (1½") of a conductivity calibration
solution (e.g. HI 70031) into a beaker. If possible, use plastic
beaker to minimize any EMC interference.
•Immerse the probe in the solution.
•Wait for a couple of minutes for thermal equilibrium to be
reached.
•Tap the probe on the bottom, then shake it lightly while rotating
to make sure no air bubbles remain trapped inside the probe.
•Press the µS/cm (or mg/L) key.
•Turn the EC/TDS calibration knob until
the display shows the EC or TDS reading
at 25°C.
EC/TDSEC/TDS
EC/TDSEC/TDS
EC/TDS CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOR

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The meters is powered by a 9V battery that is located on the rear of
the instrument.
When battery symbol is empty a low battery condition is indicated.
When the low battery indication appears, only a few hours of working
time remains.
It is recommended to replace the battery immediately.
When the battery level is so low that it may cause unreliable
measurements, the meter turns off.
Battery replacement must only take place in a nonhazardous area
using a 9V alkaline battery.
Unscrew the three screws on the rear of the meter, remove the battery
compartment cover and replace the 9V battery with a new one while
observing its polarity.
Make sure the battery contacts are tight and secure before replacing
the cover.
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT

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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. If any scratches or cracks
are present, replace the electrode. Rinse off any salt deposits with
water.
CLEANING PROCEDURE
For better accuracy in measurements and to ensure a good
performance of the probe, a frequent cleaning is recommended.
For this purpose, soak it in Hanna HI 700661 Cleaning Solution for
5 minutes.
Notes:• For particular dirty (as for example protein, oil or grease)
see the “Accessories” section for Hanna specific solutions.
•After cleaning the probe, it is recommended to recalibrate
the meter. If it is not possible to calibrate, the probe has
to be replaced with a new one.
•For field applications, it is always recommended to keep a
spare probe handy. When anomalies are not resolved with
simple maintenance, change the probe and recalibrate the
meter.
PROBE MAINTENANCEPROBE MAINTENANCE
PROBE MAINTENANCEPROBE MAINTENANCE
PROBE MAINTENANCE

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PROBES
HI 1285-0 Combination, amplified pH/EC/TDS probe with built-in
temperature sensor, 8-pin DIN connector and 1 m
(3.3') cable
HI 1285-5 Combination, amplified pH/EC/TDS/temperature probe
with built-in temperature sensor, 8-pin DIN connector
and 1 m (3.3') cable
pH BUFFER SOLUTIONS
HI 7004L pH 4.01 buffer solution, 500 mL bottle
HI 7006L pH 6.86 buffer solution, 500 mL bottle
HI 7007L pH 7.01 buffer solution, 500 mL bottle
HI 7009L pH 9.18 buffer solution, 500 mL bottle
HI 7010L pH 10.01 buffer solution, 500 mL bottle
CONDUCTIVITY & TDS CALIBRATION SOLUTIONS
HI 7031L 1413 µS/cm solution, 500 mL bottle
HI 7032L 1382 ppm (mg/L) solution, 500 mL bottle
OTHER SOLUTIONS
HI 700661P Cleaning Solution, 20 mL sachet (25 pcs)
HI 70300L Storage Solution, 500 mL bottle
HI 7073L Protein Cleaning Solution, 500 mL bottle
HI 7074L Inorganic Cleaning Solution, 500 mL bottle
HI 7077L Oil & Fat Cleaning Solution, 500 mL bottle
OTHER ACCESSORIES
HI 710007 Shockproof rubber boot, blue
HI 710008 Shockproof rubber boot, orange
HI 710050 Blue protective case
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES

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RECOMMENDATIONS FOR USERS
Before using these products, make sure 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 requiring the
operator to follow all necessary steps to correct interferences.
The glass bulb at the end of the electrode is sensitive to electrostatic
discharges. Avoid touching this glass bulb at all times.
During operation, ESD wrist straps should be worn to avoid possible
damage to the electrode by electrostatic discharges.
Any variation introduced by the user to the supplied equipment may
degrade the instrument's EMC performance.
To avoid electrical shock, do not use these instruments when voltages
at the measurement surface exceed 24 VAC or 60 VDC.
To avoid damages or burns, do not perform any measurement in
microwave ovens.
Hanna Instruments reserves the right to modify the design, construction and
appearance of its products without advance notice.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com