Hanna Instruments HI 9811-5 User manual

1
www.hannainst.com
Instruction Manual
HI9811-5
Portable
pH/EC/TDS/°C Meters

2
Dear Customer,
Thank you for choosing a Hanna Instruments 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. If you
need additional technical information, do not hesitate to e-mail us at
[email protected].
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
HI9811-5 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 your local Hanna Instruments Office.
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.
WARRANTY
TABLE OF CONTENTS

3
All rights are reserved. Reproduction in whole or in part is prohibited without
the written consent of the copyright owner.
Remove the instrument from the packing material and examine
it carefully to make sure that no damage has occurred during ship-
ment. If noticeable damage is found, please contact your local
Hanna Instruments Office.
Each meter is supplied with:
• HI1285-5, pH/EC/TDS/°C combination probe with 8-pin DIN
connector and 1 m (3.3’) cable
•HI70007, pH7.01 sachet, 1 pc.
•HI70031, 1413 µS/cm sachet, 1 pc.
•HI70032, 1382 ppm (mg/L) sachet, 1 pc.
•HI700661 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.
HI9811-5 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 tem-
perature changes with a built-in temperature sensor. The temperature
coefficient is fixed at 2%/°C.
HI9811-5 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.
PRELIMINARY EXAMINATION
GENERAL DESCRIPTION

4
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 DESCRIPTION

5
Range
0.0 to 14.0 pH
0 to 6000 µS/cm
0 to 3000 mg/L (ppm)
0.0 to 70.0 °C
Resolution
0.1 pH
10 µS/cm
10 mg/L (ppm)
0.1 °C
Accuracy
(@ 20 °C/68 °F)
±0.1 pH
±2% f.s. µS/cm
±2% f.s. mg/L (ppm)
±0.5 °C
Typical EMC Deviation
±0.1 pH
±2% f.s. µS/cm
±2% f.s. mg/L (ppm)
±0.5 °C
Conversion Factor 0.5
pH Calibration Manual, 1-point through offset trimmer
EC/TDS Calibration Manual, 1-point through slope trimmer
EC/TDS Temperature
Compensation
Automatic from 0 to 70 °C
(32 to 158 °F) with b=2%/°C
Probe (included) HI1285-5
Battery Type 1 x 9V alkaline
Battery Life Approx. 450 hours of continuous use
Environment 0 to 50 °C (32 to 122 °F)
100% RH
Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4”)
Weight 230 g (8.1 oz.)
SPECIFICATIONS

6
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 mea-
surements or calibrating, and stir briefly the electrode in tap water to
remove the storage solution. 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 HI70300 storage solution
for 30 minutes to reactivate it.
• To take a pH measurement simply
submerge the tip (4 cm/ 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 (4 cm/
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 GUIDE

7
• 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 (4 cm/ 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 HI700661
Cleaning Solution.
• After measurements have been
completed, the instrument should
be switched off, and the probe
cleaned and covered with the
protective cap.

8
For greatest accuracy, frequent calibration of the instrument is recom-
mended. 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 pH7.01 (HI7007) or pH4.01 (HI7004) or
pH10.01 (HI7010) solution into a clean beaker.
To obtain accurate readings, use pH7.01 (HI7007) if you are going
to measure neutral or close to neutral samples, pH4.01 (HI7004) if
you are going to measure acidic samples or pH10.01 (HI7010) for
alkaline measurements.
If you need to calibrate to NIST standards, use pH6.86 (HI7006)
instead of pH7.01 and pH9.18 (HI7009) instead of pH10.01.
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.
pH CALIBRATION

9
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.

10
For temperature compensation during calibration, please refer to the
following chart.
pH VALUES AT VARIOUS TEMPERATURES
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0 32 4.01 6.98 7.13 9.46 10.32
5 41 4.00 6.95 7.10 9.39 10.24
10 50 4.00 6.92 7.07 9.33 10.18
15 59 4.00 6.90 7.05 9.27 10.12
20 68 4.00 6.88 7.03 9.22 10.06
25 77 4.01 6.86 7.01 9.18 10.01
30 86 4.02 6.85 7.00 9.14 9.96
35 95 4.03 6.84 6.99 9.11 9.92
40 104 4.04 6.84 6.98 9.07 9.88
45 113 4.05 6.83 6.98 9.04 9.85
50 122 4.06 6.83 6.98 9.01 9.82
55 131 4.08 6.84 6.98 8.99 9.79
60 140 4.09 6.84 6.98 8.97 9.77
65 149 4.11 6.84 6.99 8.95 9.76
70 158 4.12 6.85 6.99 8.93 9.75
For instance, if the buffer temperature is 25 °C, the display should
show pH4.0 or 7.0 or 10.0.
If the buffer temperature is 10 °C, the display should show pH4.0 or
7.0 or 10.1.