Hanna Instruments pH 211R User Manual

Instruction Manual
pH211R
Microprocessor-based
Bench pH/mV/°C Meter
with Analog Output
www.hannainst.com
ment. This manual will provide you with all the necessary information for
correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications.
If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com.
This instrument is in compliance with the directives.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer.
Each meter is supplied with:
HI 1131B glass body pH electrode with BNC and 1 m cable
HI 7669/2W temperature probe
HI 76404 electrode holder
• pH 4.01 & pH 7.01 buffer solutions (20 mL each)
HI 7071S electrolyte solution
• 12 Vdc power adapter
• Instruction manual
Note: Save all packing material until you are sure that the
instrument functions correctly. Any defective items must be returned in the original packing with the supplied accessories.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION......................................................... 3
GENERAL DESCRIPTION ................................................................3
FUNCTIONAL DESCRIPTION ...........................................................4
SPECIFICATIONS .......................................................................... 5
OPERATIONAL GUIDE ................................................................... 6
pH CALIBRATION.......................................................................... 9
ELECTRODE CONDITIONING & MAINTENANCE............................... 12
TEMPERATURE-RESISTANCE CORRELATION
FOR pH SENSITIVE GLASS .......................................................... 15
TROUBLESHOOTING GUIDE......................................................... 16
ACCESSORIES ............................................................................ 17
WARRANTY ................................................................................ 23
GENERAL DESCRIPTION
The Hanna pH 211R is an advanced microprocessor based bench pH meter easy to operate, perfect for quality control laboratories.
pH 211R also measures in the temperature and mV ranges. Temperature compensation is automatic thanks to the HI 7669/2W
temperature probe supplied with the instrument. If necessary the user can also set temperature compensation manually.
The large display shows pH (or mV) and temperature values simultaneously.
The user is guided through the calibration process with simple instructions on the display.
The meter also features 0 to 5 V analog output.
32
FUNCTIONAL DESCRIPTION
1) Liquid Crystal Display (LCD)
2) CFM key, to confirm calibration values
3) CAL key, to enter or exit calibration mode
4) °C key, to manually decrease temperature or select pH buffer
5) °C key, to manually increase temperature or select pH buffer
6) MR key, to recall the stored value
7) MEM key, to store a value in memory
8) RANGE key, to select measurement range
9) ON/OFF button, to switch the meter on and off
10) Socket for power adapter
11) BNC connector for measurement electrode
12) Reference electrode connector
13) Temperature probe socket
14) RESET button
15) Positive (+) analog output connector
16) Negative (-) analog output connector
SPECIFICATIONS
Range -2.00 to 16.00 pH
±399.9 / ±2000 mV
-9.9 to 120.0°C
Resolution 0.01 pH
0.1 / 1 mV
0.1°C
Accuracy (@20°C/68°F) ±0.01 pH
±0.2 / ±1 mV
±0.5°C
Typical EMC Deviation ±0.03 pH
±2 mV / ±0.3°C
pH Calibration Automatic, 1 or 2 point
with 5 memorized buffers (pH 4.01, 6.86, 7.01, 9.18, 10.01)
Temperature Compensation
Automatic (with HI 7669/2W probe) or manual
-9.9 to 120°C (14 to 248°F)
pH Electrode HI 1131B glass body, double junction, refillable,
BNC connector and 1 m cable (included)
Temperature Probe HI 7669/2W (included) Input Impedance 10 Analog Output 0 to 5 VCC not isolated Analog Output Accuracy ±10 mV Power supply 12 Vdc adapter (included) Environment 0 to 50°C (32 to 122°F); RH max 95% Dimensions 240 x 182 x 74 mm (9.4 x 7.1 x 2.9") Weight 1.1 kg (2.4 lb.)
12
54
OPERATIONAL GUIDE
Power Connection
Plug the 12 Vdc adapter into the power supply socket.
Note: Make sure the mains line is protected by a fuse.
Electrode and Probe Connections
Connect the BNC of the pH or ORP electrode to the BNC socket on the rear panel.
For electrodes with a separate reference, connect the reference elec­trode plug to the reference socket (#12 on page 4).
For temperature measurements and automatic temperature compen­sation, connect the temperature probe to the appropriate socket.
Note: To prevent damage to the pH electrode, remove it from the
solution before turning the meter off. With the meter OFF, detach the electrode from the meter and
immerse it in the storage solution.
TAKING pH MEASUREMENTS
Make sure that the instrument has been calibrated for pH before taking pH measurements.
• Switch the instrument on by pressing the ON button. The meter automatically de­faults to the pH measurement mode.
• Submerge the tip (4 cm / 1½") of the electrode and temperature probe into the sample to be tested. Allow a couple of minutes for the electrode to stabilize.
(1½")
If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with water and then with some of the next sample to be measured.
pH readings are affected by temperature. In order for the meter to measure the pH accurately, temperature must be taken into consid­eration. To use the Automatic Temperature Compensation (ATC) feature, submerge the HI 7669/2W temperature probe into the sample as close to the electrode as possible and wait for a couple of minutes.
If the temperature of the sample is known or tests are always performed at the same temperature, you can simply manually compensate for it. For this purpose the temperature probe must be disconnected.
The display will then show the default tem­perature of 25°C with the "°C" symbol blinking.
Note the temperature of the sample using a ChecktempC (HI 98501) or another accurate thermometer as reference.
The temperature can now be adjusted with the °C and °C keys.
4 cm
• The pH reading is displayed on the primary LCD and temperature on the secondary one.
• To view the mV reading, press the RANGE key.
TAKING ORP MEASUREMENTS
An optional ORP electrode must be used to perform ORP measure­ments (see accessories).
Oxidation-reduction potential (REDOX) measurements provide the quantification of the oxidizing or reducing power of the sample tested.
To correctly perform a redox measurement, the surface of the ORP electrode must be clean and smooth.
76
• Switch the meter on and press the RANGE key to enter the mV mode.
• Submerge the ORP electrode tip (4 cm / 1½") into the sample. Allow a few minutes for the reading to stabilize.
• The meter displays the mV reading on the primary LCD.
• If reading is out of range, "---" will appear on the LCD.
(1½")
4 cm
OUTPUT RECORDER FUNCTION
Connect the recorder to the analog output socket and turn the instrument ON. The value on the analog output will be related with the pH or mV value displayed on the LCD as follows:
pH: 0 7 14 mV: -2000 0 2000 analog output: 0 V 2.5 V 5 V
RESET
The RESET button (#14 on page 4) should only be used when the instrument displays erroneous messages due to strong electrical inter­ference or when the power supply was disconnected before switching the meter off.
After pressing RESET, always recelibrate the unit before proceeding.
pH CALIBRATION
TAKING TEMPERATURE MEASUREMENTS
Connect the HI 7669/2W temperature probe to the proper socket on the rear panel and turn the instrument on. Dip the temperature probe in the sample and allow the reading to stabilize.
HOLD FUNCTION
Press and hold the MEM key. The last reading will be frozen on the display until MEM is released. During this operation, the MEM indicator is also shown on the LCD.
Press MR to recall the previously memorized reading. The value will be displayed with the MEM indicator on the LCD.
Frequent calibration is recommended. Moreover, the instrument should be re-calibrated for pH:
a) whenever the pH electrode is replaced b) at least once a week c) after testing aggressive chemicals d) if higher accuracy is required e) after the RESET button has been pressed
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If possible use plastic beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross contamination use two beakers for each buffer solution. One for rinsing the electrode and the second for calibration.
If you are measuring in the acid range, use pH 4.01 as second buffer; if you are measuring in the alkaline range, use pH 10.01 or pH 9.18 as second buffer.
PROCEDURE
Five memorized buffer values are available for calibration: pH 4.01,
6.86, 7.01, 9.18 and 10.01. Calibration can be performed at 1 or 2 points. For best accuracy, a 2
point calibration is recommended.
98
One-Point Calibration
Immerse pH electrode and temperature
probe approximately 4 cm (1½") into any of the available buffer solutions (pH
4.01, 6.86, 7.01, 9.18 or 10.01) and
(1½")
stir gently. The temperature probe should be close to the pH electrode.
• Press CAL. The "CAL" and " " indicators, and "7.01" will be
displayed.
Note: The buffer value displayed on the secondary LCD, varies with
temperature. For example, at 20ºC it shows 4.00, 7.03 and
10.06, while at 25ºC it shows 4.01, 7.01 and 10.01.
• If necessary, press °C or °C to select
a different buffer value.
• The "NOT READY" indication will blink on
the LCD until the reading has stabilized.
• When the reading is stable, "READY" and "CFM" will blink. Press
CFM to confirm the calibration.
4 cm
• Press CAL to quit calibration. The meter will save the one-point calibration data and return to normal mode.
Two-Point Calibration
Any two of the 5 memorized buffers can be used for this purpose. However, it is recommended to choose pH 6.86 or 7.01 as the first point and pH 4.01 (acidic sample) or pH 9.18/10.01 (alkaline environment) as the second point.
After the first calibration point is con­firmed, immerse pH electrode and temperature probe approx. 4 cm (1½") in the second buffer solution and stir gently.
(1½")
The temperature probe should be close to the pH electrode.
• If necessary, press °C or °C to select a different buffer value.
Note: The meter will automatically skip the buffer used for the first
point. It also skips pH 6.86 if 7.01 was used, and viceversa, and pH 9.18 if 10.01 was used, and viceversa.
• The "NOT READY" indication will blink on LCD until the reading has stabilized.
• When the reading is stable, "READY" and "CFM" will blink. Press CFM to confirm the calibration.
4 cm
• If the reading is close to the selected buffer value, the meter stores the calibration point. The "Stor" message appears on the LCD for 1 second, then the buffer value is displayed on the primary LCD and the secondary LCD displays the second expected buffer value.
• If the measured value is not close to the selected buffer, the "WRONG " and "WRONG " symbols will blink alter­nately.
In this case check if the correct buffer has been used or refresh the electrode by following the maintenance procedure (see "Electrode Maintenance" section). If necessary change the buffer or the electrode.
• If the reading is close to the selected buffer, the meter stores the calibration point, displays the "Stor" message for 1 second and returns to normal operational mode.
• If the measured value is not close to the selected buffer, "WRONG " and "WRONG
" will blink alternately. In this case check if the correct buffer has been used, or refresh the electrode by following the maintenance procedure (see "Elec­trode Maintenance" section). If necessary change buffer or electrode.
Note: Press RANGE to display the temperature reading on the LCD
during calibration.
1110
ELECTRODE CONDITIONING & MAINTENANCE
Note: To prevent damage to the pH electrode, remove it from the
solution before turning the meter off. With the meter OFF, detach the electrode from the instrument
and immerse it in the storage solution.
For refillable electrodes
If the filling solution (electrolyte) is more than 2.5 cm (1") below the fill hole, add HI 7082 3.5M KCl electrolyte solution for double junction or HI 7071 3.5M KCl+AgCl electrolyte solution for single junction electrodes.
For a faster response, unscrew the fill hole screw during measure­ments.
For AmpHel® electrodes
If the electrode does not respond to pH changes, the battery is run down and the electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water. Immerse the tip (bottom 4 cm /1½") in the sample and stir gently for a few seconds.
For a faster response and to avoid cross contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements.
STORAGE
To minimize clogging and assure a quick response time, the glass bulb and the junction should be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of HI 70300 storage solution or, in its absence, filling solution (HI 7071 for single junction or HI 7082 for double junction electrodes). Follow the Preparation Procedure above before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
PREPARATION
Remove the protective cap. DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. If the bulb and/or junction is dry, soak the electrode in HI 70300 storage solution for at least one hour.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Rinse off any salt deposits with water.
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 for single junction or HI 7082 for double junction electrodes). Allow the elec- trode to stand upright for 1 hour.
Follow the Storage Procedure above.
AmpHel® is a registered Trademark of "Hanna Instruments"
1312
CLEANING PROCEDURE
0
0+10+20+30+40+50+60+70+80+90
C
General Soak in Hanna HI 7061 general cleaning solution for
approximately 30 minutes.
Removal of films, dirt or deposits on the membrane/junction:
- Protein Soak in Hanna HI 7073 protein cleaning solution for 15 minutes.
- Inorganic Soak in Hanna HI 7074 inorganic cleaning solution for 15 minutes.
- Oil/grease Rinse with HI 7077 Oil & Fat cleaning solution.
IMPORTANT: After performing any of the cleaning procedures rinse the electrode thoroughly with distilled water, refill the reference cham­ber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode in HI 70300 storage solution for at least 1 hour before taking measurements.
TROUBLESHOOTING
Evaluate the performance of your electrode based on the following.
Noise (readings fluctuate up and down) could be due to:
– Clogged/Dirty Junction: refer to the Cleaning Procedure. – Loss of shielding due to low electrolyte level (in refillable
electrodes only): refill with fresh HI 7071 for single junction or HI 7082 for double junction electrodes.
Dry Membrane/Junction: soak in HI 70300 storage solution for
at least 1 hour.
Drifting: soak the electrode tip in warm (approx. 50-60°C)
Hanna HI 7082 solution for one hour and rinse the tip with distilled water. Refill with fresh HI 7071 for single junction electrodes and HI 7082 for double junction electrodes (refillable electrodes only).
Low Slope: refer to the cleaning procedure above.
No Slope: check the electrode for cracks in glass stem or bulb
and replace the electrode.
Slow Response/Excessive Drift: soak the tip in HI 7061
solution for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above.
TEMPERATURE-RESISTANCE CORRELATION FOR
HANNA pH SENSITIVE GLASS
The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the resistance. It takes longer time for the reading to stabilize if the resistance is higher. In addition, the response time will suffer to a greater degree at temperatures below 10°C.
9
2x10
-10
9
1x10
-10
8
-10
2x10
8
1x10
-10
7
2x10
-10
-10
7
1x10
-10
-20-2
-2 0 -1 0 0 +10 +20+30+40 +50 +60 +70 +80 +90 °C
Since the resistance of the pH electrode is in the range of 200 Mohm, the current across the membrane is in the pico Ampere range. Large currents can disturb the calibration of the electrode for many hours.
For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable pH reading.
The pH electrode's life also depends on the temperature. If constantly used at high temperatures, the electrode life is drastically reduced.
Typical Electrode Life Ambient Temperature 1- 3 years 90 °C Less than 4 months
120°C Less than 1 month
High concentrations of sodium ions interfere with readings in alkaline solutions; the pH at which the interference starts to be significant depends upon the composition of the glass. This interference is the alkaline error and causes the pH to be underestimated. Hanna's glass formulations have the indicated characteristics.
Alkaline Error
Sodium Ion Correction for the Glass at 20-25°C Concentration pH Error
0.1 Mol L-1 Na
+
13.00
13.50
14.00
12.50
1.0 Mol L-1 Na
+
13.00
13.50
14.00
°
0.10
0.14
0.20
0.10
0.18
0.29
0.40
1514
TROUBLESHOOTING GUIDE
ACCESSORIES
Symptoms Problem Solution
The meter is slow in responding or gives faulty readings
The meter does not ac­cept the 2nd buffer solution for calibration
The reading drifts Display shows:
Display shows:
Display shows:
Display shows: "WRONG " and
"WRONG "
Display shows: "WRONG "
and "WRONG "
The meter does not work with the tempera­ture probe
The meter fails to cali­brate or gives faulty readings
The electrode is not work­ing or the reference junction is clogged
Out of order pH electrode
Defective pH electrode Out of range pH scale
Out of range tempera­ture scale
Out of range mV scale
Erroneous buffer solution used for offset calibra­tion
Defective electrode Erroneous buffer solution
used for slope calibration
Defective electrode
Out of order temperature probe
Out of order pH electrode
Leave the electrode in a stor­age solution after cleaning the junction. If problem per­sists, replace the electrode
Follow the cleaning proce­dure. If this doesn't work replace the electrode
Replace the electrode a) Recalibrate
b) Make sure the pH sample
is in the 0 to 14 range
c) Check the electrolyte level
and the general state of the pH electrode
Make sure the temperature is in the 0 to 100°C range and the temperature probe is plugged in
Electrode not connected
Make sure the buffer setting is correct and the solution is fresh. Replace the buffer if necessary
Replace the electrode Make sure the buffer setting
is correct and the solution is fresh. Replace the buffer if necessary
Replace the electrode
Replace the probe
Replace the electrode
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 buffer solution, 20 mL sachet, 25 pcs HI 70007P pH 7.01 buffer solution, 20 mL sachet, 25 pcs HI 70010P pH 10.01 buffer solution, 20 mL sachet, 25 pcs 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 HI 8004L pH 4.01 buffer solution in FDA bottle, 500 mL HI 8006L pH 6.86 buffer solution in FDA bottle, 500 mL HI 8007L pH 7.01 buffer solution in FDA bottle, 500 mL HI 8009L pH 9.18 buffer solution in FDA bottle, 500 mL HI 8010L pH 10.01 buffer solution in FDA bottle, 500 mL
ELECTRODE MAINTENANCE SOLUTIONS
HI 70300L Storage solution, 500 mL bottle HI 80300L Storage solution in FDA bottle, 500 mL HI 70000P Rinsing solution, 20 mL sachet, 25 pcs HI 7061L General cleaning solution, 500 mL bottle HI 8061L General cleaning solution in FDA bottle, 500 mL HI 7073L Protein cleaning solution, 500 mL bottle HI 8073L Protein cleaning solution in FDA bottle, 500 mL HI 7074L Inorganic cleaning solution, 500 mL bottle HI 7077L Oil & Fat cleaning solution, 500 mL bottle HI 8077L Oil & Fat cleaning solution in FDA bottle, 500 mL HI 7071 3.5M KCl+AgCl electrolyte solution, 4 x 50 mL bottle,
for single junction electrodes
HI 8071 3.5M KCl+AgCl electrolyte solution in FDA bottle, 4 x 50
mL, for single junction electrodes
HI 7072 1M KNO3 electrolyte solution, 4 x 50 mL bottle HI 8072 1M KNO3 electrolyte solution in FDA bottle, 4 x 50 mL HI 7082 3.5M KCl electrolyte solution 4 x 50 mL bottle, for
double junction electrodes
HI 8082 3.5M KCl electrolyte solution in FDA bottle, 4 x 50 mL,
for double junction electrodes
1716
ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing pretreatment solution, 500 mL bottle HI 7092L Oxidizing pretreatment solution, 500 mL bottle
pH ELECTRODES
All electrode part numbers ending in B are supplied with BNC connector and 1 m (3.3') cable.
HI 1043B
Glass body, double junction, refillable, combination pH electrode. Use: strong acid/alkali.
12 mm
0.5"
HI 1043
"S" VERSION
9.5mm DIA
120 mm
4.7"
0.37"
HI 1053B
Glass body, triple ceramic, conic shape, refillable, combination pH electrode. Use: emulsions.
12 mm
0.5"
HI 1053
"S" VERSION
120 mm
4.7"
HI 1083B
Glass body, micro, Viscolene, non-refillable, combination pH electrode. Use: biotechnology, micro titration.
12 mm
HI 1083
0.5"
5 mm
0.2"
120 mm
4.7
3 mm
0.12"
"
3.0 mm DIA
0.12"
HI 1131B
Glass body, single junction, refillable, combination pH electrode. Use: general purpose.
12 mm
0.5"
HI 1131
"S" VERSION
9.5mm DIA
120 mm
4.7"
0.37"
HI 1330B
Glass body, semimicro, single junction, refillable, combination pH electrode. Use: laboratory, vials.
HI 1330
"S" VERSION
120 mm
4.7"
5mm DIA
0.2"
5mm
0.2"
HI 1331B
Glass body, semimicro, single junction, refillable, combination pH electrode. Use: flasks.
HI 1331
"S" VERSION
8 mm
0.3"
7.5mm DIA
210 mm
8.25"
0.29"
HI 1230B
Plastic body, double junction, gel-filled, combination pH electrode. Use: general, field.
12 mm
0.5"
HI 1230
120 mm
"
"
4.7"
HI 2031B
Glass body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products.
6 mm
0.25"
HI 2031
75 mm
"
"
2.95"
HI 1332B
Plastic body, double junction, refillable, combination pH electrode. Use: general purpose.
12 mm
0.5"
HI 1332
"S" VERSION
120 mm
4.7"
1918
FC 100B
PVDF body, double junction, refillable, combination pH electrode. Use: general purpose for food industry.
12 mm
0.5"
FC 100
120 mm
4.7"
FC 200B
PVDF body, open junction, conic, Viscolene, non-refillable, combination pH electrode. Use: meat & cheese.
6 mm
0.25"
FC 200
75 mm
2.95"
FC 210B
Glass body, double junction, conic, Viscolene, non-refillable, combina­tion pH electrode. Use: milk, yogurt.
12 mm
0.5"
FC 210
120 mm
4.7"
FC 220B
Glass body, triple-ceramic, single junction, refillable, combination pH electrode. Use: food processing.
12 mm
0.5"
FC 220
9.5mm DIA
120 mm
4.7"
0.37"
FC 911B
PVDF body, double junction, refillable with built-in amplifier, combi­nation pH electrode. Use: very high humidity.
12 mm
0.5"
HI 1413B
Glass body, single junction, flat tip, Viscolene, non-refillable, combina­tion pH electrode. Use: surface measurement.
12 mm
0.5"
HI 1413
110 mm
4.3"
ORP ELECTRODES
HI 3131B
Glass body, refillable, combination platinum ORP electrode. Use: titration.
12 mm
0.5"
HI 3131
150 mm
"S" VERSION
5.9"
HI 3230B
Plastic body, gel-filled, combination platinum ORP electrode. Use: general purpose.
12 mm
0.5"
HI 3230
120 mm
"S" VERSION
4.7"
HI 4430B
Plastic body, gel-filled, combination gold ORP electrode. Use: general purpose.
12 mm
0.5"
HI 4430
120 mm
"S" VERSION
4.7"
FC 911
110 mm
4.3"
2120
Extension cables for screw-type electrodes (screw to BNC adapter)
HI 7855/1 Extension cable 1 m (3.3') long HI 7855/3 Extension cable 3 m (9.9') long
HI 7855 SERIES CABLE CONNECTORS
CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC
CONNECT TO SCREW TYPE ELECTRODES
CONNECT TO THE
BNC SOCKET
OF THE METER
OTHER ACCESSORIES
HI 710005 Voltage adapter, 115 Vac / 12 Vdc, US plug HI 710006 Voltage adapter, 230 Vac / 12 Vdc, European plug HI 710012 Voltage adapter, 230 Vac / 12 Vdc, UK plug HI 710013 Voltage adapter, 230 Vac / 12 Vdc, S.Africa plug HI 710014 Voltage adapter, 230 Vac / 12 Vdc, Australian plug HI 76404 Electrode holder
WARRANTY
All Hanna Instruments meters are 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 a period of six months. This warranty is limited to repair or replacement free of charge. Damage due to accident, misuse, tampering or lack of prescribed maintenance are 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 failure. 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 Customer Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection.
All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner.
HI 7669/2W Temperature probe with 1 m (3.3') cable HI 8427 pH/ORP electrode simulator HI 931001 pH/ORP electrode simulator with LCD HI 98501 ChecktempC pocket-size thermometer (range: -50.0
to 150.0°C)
Hanna Instruments reserves the right to modify the design, construction and
appearance of its products without advance notice.
Recommendations for Users
Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment, requiring the operator to take all necessary steps to correct interferences. The glass bulb at the end of the pH 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 this instrument 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.
2322
SALES AND TECHNICAL SERVICE CONTACTS
CE DECLARATION OF CONFORMITY
Australia:
Tel. (03) 9769.0666 • Fax (03) 9769.0699
China:
Tel. (10) 88570068 • Fax (10) 88570060
Egypt:
Tel. & Fax (02) 2758.683
Germany:
Tel. (07851) 9129-0 • Fax (07851) 9129-99
Greece:
Tel. (210) 823.5192 • Fax (210) 884.0210
Indonesia:
Tel. (21) 4584.2941 • Fax (21) 4584.2942
Japan:
Tel. (03) 3258.9565 • Fax (03) 3258.9567
Korea:
Tel. (02) 2278.5147 • Fax (02) 2264.1729
Malaysia:
Tel. (603) 5638.9940 • Fax (603) 5638.9829
Singapore:
Tel. 6296.7118 • Fax 6291.6906
South Africa:
Tel. (011) 615.6076 • Fax (011) 615.8582
Taiwan:
Tel. 886.2.2739.3014 • Fax 886.2.2739.2983
Thailand:
Tel. 66.2619.0708 • Fax 66.2619.0061
United Kingdom:
Tel. (01525) 850.855 • Fax (01525) 853.668
USA:
Tel. (401) 765.7500 • Fax (401) 765.7575
For e-mail contacts and complete list of Sales and Technical offices, please see www.hannainst.com
24
MANPH211R-R1 08/05
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