HI 9812-5 Portable pH/EC/TDS/��C Meter

HI 9812-5 Portable pH/EC/TDS/��C Meter
Instruction Manual
HI 9812-5
Portable
pH/EC/TDS/°C Meter
w w w. h a n n a i n s t . c o m
1
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.
If you need additional technical information, do not hesitate to e-mail
us at [email protected]
WARRANTY
HI 9812-5 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.
TABLE OF CONTENTS
WARRANTY .................................................................................. 2
PRELIMINARY EXAMINATION ........................................................ 3
GENERAL DESCRIPTION ................................................................ 3
FUNCTIONAL DESCRIPTION .......................................................... 4
SPECIFICATIONS ........................................................................... 5
OPERATIONAL GUIDE ................................................................... 6
pH CALIBRATION ......................................................................... 8
pH VALUES AT VARIOUS TEMPERATURES ..................................... 9
EC/TDS CALIBRATION ................................................................. 10
EC/TDS CONVERSION FACTOR ..................................................... 11
BATTERY REPLACEMENT .............................................................. 12
PROBE MAINTENANCE ................................................................ 13
ACCESSORIES ............................................................................. 14
2
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:
• Combination probe with 8-pin DIN connector & 1 m (3.3') cable
HI 1285-5, pH/EC/TDS/°C probe
• HI 70007, pH 7.01 sachet, 1 pc
• HI 70031, 1413 µS/cm sachet, 1 pc
• HI 70032, 1382 ppm 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 items must be returned in the
original packing together with the supplied accessories.
GENERAL DESCRIPTION
HI 9812-5 is the complete, versatile and splash-proof portable
combination meter specially dedicated to aquariums, fish-farming and
seawater applications.
The instrument provides measurements for pH, EC, TDS and temperature
ranges, which are easily selectable through a 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 9812-5 is a pH/EC/TDS meter designed for simplicity of use
in taking pH, µS/cm, ppm and temperature measurements.
Suited for hydroponics, greenhouses, farming and ground water
applications.
All rights are reserved. Reproduction in whole or in part is prohibited without the written
consent of the copyright owner.
3
FUNCTIONAL DESCRIPTION
1)
2)
3)
4)
5)
6)
7)
8)
9)
8-pin DIN connector for probe
Liquid Crystal Display
pH range selection key
µS/cm (EC) range selection key
ppm (TDS) selection key
pH offset calibration knob
EC/TDS calibration knob
°C (Temperature) selection key
On/Off key
4
SPECIFICATIONS
Range
0.0 to 14.0 pH
0 to 1990 µS/cm
0 to 1990 ppm
0 to 60 °C
Resolut ion
0.1 pH
10 µS/cm
10 ppm
1°C
Accuracy
(@ 20 °C/68 °F)
±0.1 pH
±2% f.s. µS/cm
±2% f.s. ppm
±1 °C
Typical EMC Deviat ion
±0.1 pH
±2% f.s. µS/cm
±2% f.s. ppm
±1 °C
Conversion Fact or
0.5
pH Calibrat ion
Manual, 1-point through offset
trimmer
EC/TDS Calibrat ion
Manual, 1-point through slope
trimmer
EC/TDS Temperat ure
Compensat ion
Automatic from 0 to 50 °C
(32 to 122 °F) with β=2%/°C
Probe (included)
HI 1285-5
Bat t ery Type
1 x 9V alkaline
Bat t ery Life
Approx. 150 hours of continuouse 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.)
5
OPERATIONAL GUIDE
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.
6
• 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;
“ppm” 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 a “1” on
the far left hand side and a
“0” on the far right hand side,
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.
7
p H CALIBRATION
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 NBS 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.
• Select the °C mode by pressing the °C
key and read the displayed value to
take the temperature of the buffer
solution, e.g. 10.0°C.
• 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.
Notes: • The probe should be submerged approximately 4 cm
(1½") into the solution.
• 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.
8
pH VALUES AT VARIOUS TEMPERATURES
For temperature compensation during calibration, please refer to the
following chart.
TEMP
pH VALUES
ºC
ºF
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 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.
9
EC/TDS CALIBRATION
Accessories needed:
• Use HI 70031 (1413 µS/cm) EC calibration solution or
HI 70032 (1382 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.
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 ppm) key.
• Turn the EC/TDS calibration knob until
the display shows the EC or TDS reading
at 25°C.
10
EC/TDS CONVERSION FACTOR
The TDS value in aqueous solutions is directly proportional to the
conductivity. The ratio between the two parameters depends on the
solution.
The instrumen has a fixed conversion factor set to 0.5. This means
that 1 µS/cm is equal to 0.5 ppm of TDS.
11
BATTERY REPLACEMENT
These meters are 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.
12
PROBE MAINTENANCE
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.
13
ACCESSORIES
PROBES
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
14
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.
15
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
Technical Support for Customers
Tel. (800) 426 6287
Fax (401) 765 7575
E-mail [email protected]
www.hannainst.com
Local Sales and Customer Service Office
Printed in EUROPE
(ROMANIA)
MAN9812 09/10
16
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