Hanna Instruments PH 210 User Manual

HANNA LITERATURE
Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as:
• Water Treatment
Instruction Manual
pH 210 pH 211 pH 212 pH 213
• Process
• Swimming Pools
• Agriculture
• Food
• Laboratory
• Thermometry
and many others. New reference material is constantly being added to the library.
For these and other catalogs, handbooks and leaflets, contact your dealer or the Hanna Customer Service Center nearest to you. To find the Hanna Office in your vicinity, check our home page at www.hannainst.com.
Microprocessor-based
Bench pH/mV/°C Meters
MANPH213R2 02/00
http://www.hannainst.com
Manufacturers since 1978
These Instruments are in
Compliance with the CE Directives
Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction
manual carefully before using the instrument. This manual will provide you with the necessary information for a
correct use of the instrument, as well as a precise idea of its versatil­ity.
If you need more technical information, do not hesitate to e-mail us at tech@hannainst.com.
These instruments are in compliance with directives.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
PRELIMINARY EXAMINATION ...................................................... 3
GENERAL DESCRIPTION ............................................................. 3
FUNCTIONAL DESCRIPTION pH 210 AND pH 211 ....................... 4
SPECIFICATIONS pH 210 AND pH 211 ...................................... 5
FUNCTIONAL DESCRIPTION pH 212 AND pH 213 ....................... 6
SPECIFICATIONS pH 212 AND pH 213 ...................................... 7
OPERATIONAL GUIDE ................................................................ 8
pH CALIBRATION ................................................................... 11
TEMPERATURE CALIBRATION (pH 212 AND pH 213 ONLY) ........ 14
mV CALIBRATION (pH 213 ONLY) ........................................... 15
INTERFACE WITH PC (pH 212 AND pH 213 ONLY) .................... 16
pH VALUES AT VARIOUS TEMPERATURES ................................. 18
ELECTRODE CONDITIONING & MAINTENANCE ............................. 19
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ..........22
TROUBLESHOOTING GUIDE ..................................................... 23
ACCESSORIES ......................................................................... 24
WARRANTY ............................................................................ 30
CE DECLARATION OF CONFORMITY ........................................... 31
CE DECLARATION OF CONFORMITY
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 24VAC or 60VDC. To avoid damages or burns, do not perform any measurement in microwave ovens.
2
31
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
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. The electrodes and the 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.
To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., 584 Park East Drive, Woonsocket, Rhode Island, 02895 , USA.
Hanna Instruments reserves the right to modify the design, con­struction and appearance of its products without advance notice.
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 or the nearest Hanna Custumer Service Center.
Each meter comes supplied complete with:
HI 1131B glass-body combination pH Electrode with 1 m (3.3') cable
HI 7669/2W Temperature Probe
HI 76404 Electrode Holder
• pH 4.01 & 7.01 Buffer Solutions (20mL each)
HI 7071S Electrolyte Solution
• 12VDC Power Adapter
• Instruction Manual
Note: Save all packing material until you are sure that the
instrument functions correctly. All defective item must be returned in the original packing with the supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
The Hanna pH 210, pH 211, pH 212 and pH 213 are micropro­cessor-based bench meters for pH and temperature measurements.
pH 211 and pH 213 can also measure ion concentration (ISE) and ORP (Oxidation Reduction Potential) in the mV range.
The pH measurements are compensated for temperature effect manu­ally or automatically with the HI 7669/2W temperature probe.
The meter comes equipped with a large easy-to-read LCD which shows the pH (or mV) and temperature simultaneously together with graphic symbols.
The calibration process is guided step by step through clear indications on the LCD. A stability indicator make the calibration procedure error­free.
Through the RS 232C serial port you can transfer the data to a PC (pH 212 and pH 213 only).
30
3
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
pp
HH
210 AND 210 AND
p
H
210 AND
pp
HH
210 AND 210 AND
pp
HH
211 211
p
H
211
pp
HH
211 211
1) Liquid Crystal Display (LCD)
2)
CFM key, to confirm calibration values
3) CAL key, to enter or exit calibration mode
4) WC key, to manually decrease temperature or select pH buffer
5) V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 (pH 211 only)
9) ON/OFF switch
10) Power adapter socket
11) BNC electrode connector
12) Electrode reference socket
13)
Temperature probe socket
14) RESET button
Extension cables for screw-type electrodes (screw to BNC adapter)
HI 7855/1 Extension cable 1m (3.3') long HI 7855/3 Extension cable 3m (9.9') long
HI 7855 SERIES CABLE CONNECTORS
CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC
CONNECT TO SCREW TYPE
ELECTRODES
OO
THER ACCESSORIESTHER ACCESSORIES
O
THER ACCESSORIES
OO
THER ACCESSORIESTHER ACCESSORIES
HI 710005 Voltage adapter from 115 VAC to 12 VDC (USA plug) HI 710006 Voltage adapter from 230 VAC to 12 VDC (European
plug)
HI 710012 Voltage adapter from 240 VAC to 12 VDC (UK plug) HI 710013 Voltage adapter from 230 VAC to 12 VDC (South
Africa plug)
HI 710014 Voltage adapter from 230 VAC to 12 VDC (Australia
plug)
ChecktempC Pocket-size thermometer (range -50.0 to 150.0C) HI 76405 Electrode holder HI 8427 pH and ORP electrode simulator with 1 m (3.3')
coaxial cable ending in female BNC connectors HI 931001 pH and ORP electrode simulator with LCD and 1 m (3.3') coaxial cable ending in female BNC connectors
HI 7669/2W Temp. probe with 1 m (3.3') cable HI 92000 Windows® compatible software HI 920010 9 to 9-pin RS232 cable
Windows® is registered Trademark of "Microsoft Co."
CONNECT TO THE
BNC SOCKET
OF THE METER
4
29
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 (Ultem®), gel-filled, combination platinum ORP elec- trode. Use: general purpose.
12 mm
0.5"
HI 3230
120 mm
"S" VERSION
4.7"
HI 4430B
Plastic-body (Ultem®), gel-filled, combination gold ORP electrode. Use: general purpose.
12 mm
0.5"
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
pp
H 210 AND H 210 AND
p
H 210 AND
pp
H 210 AND H 210 AND
Range pH 0.00 to 14.00
Resolution pH 0.01
Accuracy pH ±0.01 (@20°C/68°F) mV ±0.2 mV (ISE, pH 211 only)
Typical EMC pH ±0.03 Deviation mV ±2 mV (pH 211 only)
pH Calibration Automatic 1 or 2 points with 5 memorized buffers
Temperature Automatic or manual Compensation from 0 to 100C (32 to 212F)
Electrode HI 1131B glass-body combination
Temperature probe HI 7669/2W (included) Input impedance 10 Power supply 12 VDC adapter (included) Environment 0 to 50C (32 to 122F)
Dimensions 240x182x74 mm (9.4x7.1x2.9") Weight 1.1 kg (2.5 lb.); kit with holder: 2.5 kg (5.5 lb.)
mV ±399.9 (ISE, pH 211 only) mV ±1999 (ORP, pH 211 only)
°C 0.0 to 100.0
mV 0.1 (ISE, pH 211 only)
mV 1 (ORP, pH 211 only)
°C 0.1
mV ±1mV (ORP, pH 211 only)
°C ±0.5
°C ±0.3
pp
H 211H 211
p
H 211
pp
H 211H 211
(4.01, 6.86, 7.01, 9.18, 10.01)
refillable pH electrode (included)
12
max. 95% RH non-condensing
HI 4430
120 mm
"S" VERSION
4.7"
Consult the Hanna General Catalog for more electrodes with screw­type or BNC connectors.
Ultem® is registered Trademark of "General Electrics Co." Kynar® is registered Trademark of "Pennwalt Corp."
28
5
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
pp
HH
212 AND212 AND
p
H
212 AND
pp
HH
212 AND212 AND
pp
HH
213213
p
H
213
pp
HH
213213
FC 100B
Plastic-body (Kynar®), double junction, refillable, combination pH electrode. Use: general purpose for food industry.
12 mm
0.5"
FC 100
120 mm
4.7"
FC 200B
Plastic-body (Kynar®), 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"
1) Liquid Crystal Display (LCD)
CFM key, to confirm calibration values
2)
3) CAL key, to enter or exit calibration mode
4) WC key, to manually decrease temperature or select pH buffer
5) V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) COMM key, to set baud rate
9) RANGE key, to select measurement range
10) ON/OFF switch
11) Power adapter socket
12) BNC electrode connector
13) Electrode reference socket
14)
Temperature probe socket
15) RESET button
16) RS232C socket
6
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
Plastic-body (Kynar®), double junction, refillable with built-in ampli­fier, combination pH electrode. Use: very high humidity.
12 mm
0.5"
FC 911
110 mm
4.3"
27
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 (Ultem®), 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"
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
pp
HH
212 AND 212 AND
p
H
212 AND
pp
HH
212 AND 212 AND
Range pH -2.00 to 16.00 / -2.000 to 16.000
Resolution pH 0.01 / 0.001
Accuracy pH ±0.002 & ±0.01 (@20°C/68°F) mV ±0.05% f.s. (ISE and ORP, pH 213 only)
Typical EMC pH ±0.01 Deviation mV ±0.6 (pH 213 only)
pH Calibration Automatic 1 or 2 points with 5 memorized buffers
Temperature From 0 to 100C (32 to 212F) manual or Compensation automatic with HI 7669/2W probe (included)
Electrode HI 1131B glass-body combination
Temperature probe HI 7669/2W (included) Input impedance 10 Computer Interface Opto-isolated RS232C Power supply 12 VDC adapter (included) Environment 0 to 50C (32 to 122F)
Dimensions 240x182x74 mm (9.4x7.1x2.9") Weight 1.1 kg (2.5 lb.); kit with holder: 3.0 kg (6.5 lb.)
mV ±999.9 (ISE and ORP, pH 213 only)
°C 0.0 to 100.0
mV 0.1 (ISE and ORP, pH 213 only)
°C 0.1
°C ±0.5
°C ±0.5
pp
HH
213213
p
H
213
pp
HH
213213
(4.01, 6.86, 7.01, 9.18, 10.01)
refillable pH electrode (included)
12
max. 95% RH non-condensing
HI 2031
75 mm
"
"
2.95"
HI 1332B
Plastic-body (Ultem®), double junction, refillable, combination pH electrode. Use: general purpose.
12 mm
0.5"
HI 1332
"S" VERSION
120 mm
26
4.7"
7
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
Power connection
Plug the 12VDC adapter into the power supply socket (#10 on page 4; #11 on page 6).
Note: pH 212 and pH 213 use an EEPROM to retain the pH, mV
and temperature calibrations as well as the serial communica­tion setting. The instrument will retain the data after a calibration or serial communication setting, even when it is unplugged.
Note:Note:
Note: Make sure the main line is protected by a fuse.
Note:Note:
Electrode and Probe connections
For combination pH or ORP electrodes (with internal reference) connect the electrode's BNC to the socket on the back of the meter (#11 on page 4; #12 on page 6).
For electrodes with a separate reference, connect the single cell electrode's BNC to the BNC socket (#11 on page 4; #12 on page 6) and the reference electrode plug to the reference socket (#12 on page 4; #13 on page 6).
For temperature measurements and automatic temperature compen­sation connect the temperature probe to the appropriate socket (#13 on page 4; #14 on page 6).
Note: to prevent damage to the electrode, remove the pH electrode
from the solution before turning the meter off. If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
pH MEASUREMENTS
Make sure that the instrument has been calibrated before taking pH measurements.
• Switch the instrument on by pressing the ON/OFF switch.The meter automatically defaults to the pH mea­surement mode.
• Submerge the tip (4cm/1½") of the elec­trode and the temperature probe into the sample to be tested. Allow time for the electrode to stabilize.
8
(1½ ")
4 cm
ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing Pretreatment Solution, 460 mL HI 7092L Oxidizing Pretreatment Solution, 460 mL
pH ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable, as shown below :
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.
HI 1083
12 mm
0.5"
5 mm
0.2"
120 mm
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
25
9.5mm DIA
120 mm
4.7"
0.37"
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 Buffer Sachets, 20mL, 25 pcs HI 70007P pH 7.01 Buffer Sachets, 20mL, 25 pcs HI 70010P pH 10.01 Buffer Sachets, 20mL, 25 pcs HI 7004L pH 4.01 Buffer Solution, 460 mL HI 7006L pH 6.86 Buffer Solution, 460 mL HI 7007L pH 7.01 Buffer Solution, 460 mL HI 7009L pH 9.18 Buffer Solution, 460 mL HI 7010L pH 10.01 Buffer Sol., 460 mL HI 8004L pH 4.01 Buffer Solution in FDA approved bottle, 460 mL HI 8006L pH 6.86 Buffer Solution in FDA approved bottle, 460 mL HI 8007L pH 7.01 Buffer Solution in FDA approved bottle, 460 mL HI 8009L pH 9.18 Buffer Solution in FDA approved bottle, 460 mL HI 8010L pH 10.01 Buffer Solution in FDA approved bottle, 460 mL
ELECTRODE STORAGE SOLUTIONS
HI 70300L Storage Solution, 460 mL HI 80300L Storage Solution in FDA approved bottle, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P Electrode Rinse Sachets, 20 mL, 25 pcs HI 7061L General Cleaning Sol., 460 mL HI 7073L Protein Cleaning Sol., 460mL HI 7074L Inorganic Cleaning Sol., 460mL HI 7077L Oil & Fat Cleaning Sol.,460 mL HI 8061L General Cleaning Solution in FDA approved bottle, 460 mL HI 8073L Protein Cleaning Solution in FDA approved bottle, 230 mL HI 8077L Oil & Fat Cleaning Solution in FDA approved bottle,460mL
REFILL ELECTROLYTE SOLUTIONS
HI 7071 3.5M KCl + AgCl Electrolyte, 4x50mL, for single junc-
tion electrodes
HI 7072 1M KNO3 Electrolyte, 4x50 mL HI 7082 3.5M KCl Electrolyte, 4x50 mL, for double junction elec-
trodes
HI 8071 3.5M KCl + AgCl Electrolyte in FDA approved bottle,
4x50mL, for single junction electrodes
HI 8072 1M KNO3 Electrolyte in FDA approved bottle, 4x50 mL HI 8082 3.5M KCl Electrolyte in FDA approved bottle, 4x50 mL, for
double junction electrodes
• pH is displayed on the primary display and temperature on the secondary one.
• With pH 211 and pH 213 it is also possible to view the mV reading by pressing the "RANGE" key.
If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with deionized water or, if not available, tap water first and then with some of the next sample to condition the electrode before immersing it in the sample.
The pH reading is 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 feature, connect and 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 or the last recorded temperature reading with the "C" symbol blinking.
Note the temperature of the sample using a ChecktempC or an accurate reference thermometer.
The temperature can now be adjusted with the VC and WC keys.
24
9
ORP MEASUREMENTS (pH211 and pH213 only)
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.
• Switch the meter on and press the "RANGE" key to enter the mV mode.
• Submerge the ORP electrode tip (4cm/1½") into the sample. Allow a few minutes for the reading to stabilize.
• The meter displays the mV reading on the primary display.
(1½ ")
4 cm
TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
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:
The electrode is not work­ing or the reference junction is clogged
Out of order pH electrode
Defective pH electrode Out of range pH scale
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 specified range
c) Check the electrolyte level
and the general state of the pH electrode
• If readings are out of range, "---" will appear on the LCD.
TAKING TEMPERATURE MEASUREMENTS
Taking a
temperature measurement is very easy. Connect the HI 7669/2W turn the instrument on. Dip the temperature
temperature probe and
probe in the sample and allow the reading on the second­ary display to stabilize.
HOLD FUNCTION
Press and hold MEM. 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 and the previously memorized reading will be displayed with the MEM indicator on the LCD.
Display shows:
Display shows:
Display shows: "WRONG 1 "
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
"
2
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
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
10
23
TEMPERATURE CORRELATION FOR TEMPERATURE CORRELATION FOR
20
0 +10+20 +30+40 +50+60+70+80+90
C
TEMPERATURE CORRELATION FOR
TEMPERATURE CORRELATION FOR TEMPERATURE CORRELATION FOR
SENSITIVE GLASSSENSITIVE GLASS
SENSITIVE GLASS
SENSITIVE GLASSSENSITIVE GLASS
pp
HH
p
H
pp
HH
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-
-20 -10 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
1.0 Mol L-1 Na
+
+
13.00
13.50
14.00
12.50
13.00
13.50
14.00
0.10
0.14
0.20
0.10
0.18
0.29
0.40
RESET
The RESET button (#14 on page 4;#15 on page 6) should only be used when the instrument displays erroneous messages due to strong electrical interference or when the instrument's power supply was disconnected before the meter was switched off.
After pressing RESET always recalibrate the unit before proceeding.
pp
H CALIBRATIONH CALIBRATION
p
H CALIBRATION
pp
H CALIBRATIONH CALIBRATION
Calibrate the instrument often, especially if high accuracy is required. The instrument should be recalibrated :
a) Whenever the pH electrode is replaced. b) At least once a week. c) After testing aggressive chemicals. d) After pressing RESET. e) If higher accuracy is required.
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
HI 7004
HI 7004
beakers for each buffer solution. One for
HI 7007
RINSE
CALIBRATION
rinsing the electrode and the second for calibration.
HI 7007
HI 7007
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
Calibration has a choice of 5 memorized buffers: pH 4.01, 6.86,
7.01, 9.18 and 10.01. It is always recommended to perform a two-point calibration. The pH
meters however also provide for one-point calibration, as described below.
22
11
One-point calibration
••
• Immerse the pH electrode and the tem-
••
perature probe approximately 4 cm (1½") into a buffer solution of your choice (pH
4.01, 6.86, 7.01, 9.18 or 10.01) and stir gently. The temperature probe should
(1½ ")
4 cm
be close to the pH electrode.
• Press CAL. The "CAL" and " " indicators and the most common
"7.01" buffer will be displayed on the secondary LCD.
• If necessary, press "VC" or "WC" to
select a different buffer value.
• 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.
• If the reading is close to the selected buffer, the meter stores the
reading. The calibrated value is then displayed on the primary LCD and the secondary LCD will display the second expected buffer value.
• If the value measured by the meter 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 below. If necessary change the buffer or the electrode.
• Press CAL to quit calibration. The meter will return to
normal operation and memorize the one-point calibra­tion data.
CLEANING PROCEDURE
General Soak in Hanna HI 7061 or HI 8061 General Cleaning
Solution for approximately ½ hour.
Removal of films, dirt or deposits on the membrane/junction:
-
Protein
-
Inorganic
-
Oil/grease
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 or HI 80300 Storage Solution for at least 1 hour before taking measurements.
TROUBLESHOOTING
Evaluate your electrode performance based on the following.
Noise (Readings fluctuate up and down) could be due to:
– Clogged/Dirty Junction: Refer to the Cleaning Procedure above. – Loss of shielding due to low electrolyte level (in refillable
Dry Membrane/Junction: Soak in HI 70300 or HI 80300 Stor- age Solution for at least 1 hour.
Drifting: Soak the electrode tip in warm (approx. 50-60C) Hanna HI 7082 or HI 8082 Solutions for one hour and rinse the tip with distilled water. Refill with fresh HI 7071 or HI 8071 for single junction electrodes and HI 7082 or HI 8082 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 or HI 8061 Solutions for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above.
Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution for 15 minutes.
Soak in Hanna HI 7074 or HI 8074 Inorganic Clean­ing Solution for 15 minutes.
Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution.
electrodes only): refill with fresh HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes.
12
21
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 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 or HI 80300 Storage Solution or, in its absence, Filling Solution (HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes). Follow the Preparation Procedure above before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
Two-point calibration
Any two of the 5 memorized buffers can be used for this purpose. However, it is recommended that pH 6.86 or 7.01 is chosen as the first point and pH 4.01 (acidic) or pH 9.18/10.01 (alkaline) as the second point.
• Proceed as described in “One-point calibration” above but do not quit calibration by pressing CAL at the end.
••
• After the first calibration point is con-
•• firmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½") in the second buffer solution and stir gently. The temperature probe should
(1½ ")
be close to the pH electrode.
• If necessary, press "VC" or "WC" to
select a different buffer value.
Note: The meter will automatically skip the buffer used for the first
point. It also skips 6.86 if 7.01 was used, and viceversa. Likewise, it will skip 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
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 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction elec­trodes). Allow the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.
AmpHel® is a registered Trademark of "Hanna Instruments"
20
• If the reading is close to the selected buffer, the meter stores the reading and returns to normal operational mode.
• If the value measured by the meter 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 regenarate the electrode by following the cleaning procedure below. If necessary change the buffer or the electrode.
Note: Press RANGE to display the temperature reading
on the LCD during calibration (pH211, pH212, pH213 only).
13
TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
pp
H 212 AND H 212 AND
p
H 212 AND
pp
H 212 AND H 212 AND
pp
H 213 ONLYH 213 ONLY
p
H 213 ONLY
pp
H 213 ONLYH 213 ONLY
(for technical personnel only)
All the meters are factory calibrated for temperature. The temperature probes are interchangeable and no temperature
calibration is needed when they are replaced. If, for any reason, the temperature measurements are inaccurate,
temperature recalibration may be carried out. For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center.
• Prepare a vessel containing ice and water and another one containing hot water (at a temperature of around 50C). Place insulation material around the vessels to minimize temperature changes.
• Use a ChecktempC or a calibrated ther­mometer with a resolution of 0.1C as a reference thermometer.
• With the instrument off, press and hold CAL and then the ON switch. The "CAL" indicator will come on and the secondary LCD will show 0.0C.
(32 °F)
°C
0 °C
50 ºC
(122 ºF)
ELECTRODE CONDITIONING &ELECTRODE CONDITIONING &
ELECTRODE CONDITIONING &
ELECTRODE CONDITIONING &ELECTRODE CONDITIONING &
MAINTENANCEMAINTENANCE
MAINTENANCE
MAINTENANCEMAINTENANCE
Note: To prevent damage to the electrode, remove the pH electrode
from the solution before turning the meter off. If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
° C
• Immerse the temperature probe in the vessel with the ice and water as near to the ChecktempC as possible. Allow a couple of minutes for the probe to stabilize.
• Use the "VC" or "WC" key to set the reading on the secondary LCD to that of ice and water, measured by checktempC (for example, 0.1 ºC).
• Press CFM to confirm. The secondary LCD will show
50.0C.
• Immerse the temperature probe in the second vessel as near to the ChecktempC as possible.
14
0 °C
(32 °F)
50 °C
(122 °F)
°
C
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
°
C
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 or
HI 80300
Storage Solution for at least one hour.
19
pp
H VALUES AT VARIOUSH VALUES AT VARIOUS
p
H VALUES AT VARIOUS
pp
H VALUES AT VARIOUSH VALUES AT VARIOUS
TEMPERATURESTEMPERATURES
TEMPERATURES
TEMPERATURESTEMPERATURES
Temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. During calibration the meter will automatically calibrate to the pH value corresponding to the measured or set temperature.
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
7.04
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
9.10
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
4.07
6.84
6.98
8.99
9.79
60
140
4.09
6.84
6.98
8.97
9.77
65
149
4.11
6.85
6.99
8.95
9.76
70
158
4.12
6.85
6.99
8.93
9.75
Allow a couple of minutes for the probe to stabilize.
• Use the "VC" or "WC" key to set the reading on the secondary LCD to that of the hot water
• Press CFM to confirm. The meter returns to normal operational mode.
mm
V CALIBRATIONV CALIBRATION
m
V CALIBRATION
mm
V CALIBRATIONV CALIBRATION pp
H 213 ONLYH 213 ONLY
p
H 213 ONLY
pp
H 213 ONLYH 213 ONLY
(for technical personnel only)
All the meters are factory calibrated for mV. The ORP electrodes are interchangeable and no mV calibration is
needed when they are replaced. If, for any reason, the mV measurements are inaccurate, mV
recalibration may be carried out. For an accurate recalibration, contact your dealer or the nearest
Hanna Customer Service Center.
• Attach to the electrode BNC connector a mV simulator with a range of at least ±500.0 mV and an accuracy of ±0.1 mV.
• With the instrument off, press and hold CFM and then the ON switch. The "CAL" indicator will come on and the primary LCD will show 380.0 mV.
• Set 380.0 mV on the simulator.
For instance, if the buffer temperature is 25C, the display will show pH 4.01 or 7.01 or 10.01. If the buffer temperature is 20C, it will show pH 4.00/7.03/10.06 or at 50C, the display will show pH 4.06/
6.98/9.82.
18
• Wait for 3 sec. and press CFM. The LCD will display -380.0 mV asking for this value to be set.
• Set -380.0 mV on the simulator.
• Wait for 3 sec. and press CFM. The LCD will display 500.0 mV.
• Set 500.0 mV on the simulator.
• Wait for 3 sec. and press CFM. The LCD will display -500.0 mV.
• Set -500.0 mV on the simulator.
• Wait for 3 sec. and press CFM.
• The secondary LCD will display 0.0C. It is now possible to proceed with the temperature calibration, if neces­sary, as described above, or return to normal operation by pressing CAL.
15
INTERFACE WITH INTERFACE WITH
INTERFACE WITH
INTERFACE WITH INTERFACE WITH
(p(p
H 212 AND H 212 AND
(p
H 212 AND
(p(p
H 212 AND H 212 AND
Data transmission from the instrument to the PC is now much easier with the new HI 92000 Windows® compatible application software (optional). HI 92000 also offers an on-line help feature.
Simply run your desired spread sheet and open the file downloaded by HI 92000. Data can be further elaborated with graphics, statis­tical analysis, etc. using the most diffused spread sheet programs (e.g. Excel©, Lotus 1-2-3©).
To install HI 92000 you need a 3.5" drive and a few minutes to follow the instructions printed on the disk label.
To connect your meter to the PC use the optional Hanna HI 920010 cable connector. Make sure that your meter is switched off and plug the connectors, one into the meter RS232C socket and the other into the serial port of your PC.
Note: Cables other than HI 920010 may use a different configura-
tion, in which case, communication between the meter and the PC may not be possible.
If you are not using Hanna Instruments HI 92000 software, please find below some additional information to help you link-up to your PC.
Setting the Baud Rate and the Command Prefix
The baud rate of the meter and of the external device must be the same. To set the baud rate of the meter press COMM, the primary LCD shows the current baud rate.
The following baud rates can be selected with the "VC" or "WC" key: 150, 300,
600, 1200 (factory setting) and 2400. Press CFM to confirm the setting. The primary LCD will show the
current command prefix (factory setting is 16).
Note: The Command Prefix must not be changed when using
Hanna HI 92000 Software.
pp
H 213 ONLY)H 213 ONLY)
p
H 213 ONLY)
pp
H 213 ONLY)H 213 ONLY)
Windows® is registered Trademark of "Microsoft Co."
16
PCPC
PC
PCPC
application
Excel© Copyright of "Microsoft Co."
Lotus 1-2-3© Copyright of "Lotus Co."
Select, if necessary, a different command prefix (between 0 and 47) by pressing the "VC" or "WC" key.
Press CFM to confirm the setting.
Sending Commands from PC
With any terminal program it is possible to remotely control your meter. Use HI 920010 cable to connect the meter to a PC, start the terminal program and set the communication options as follows: 8, N, 1, no flow control.
Command Types
To send a command to the pH meter the scheme is:
<DLE> <
This line makes the computer send a Data Link Escape character, the command expressed as a 3-character sequence and a CR character.
Note: All the terminal programs that support the ANSI escape se-
quence, represent the DLE character by the string '^P' and the CR character by the string '^M'.
Commands not requiring an answer from the pH meter:
PHR sets the range to pH MVR sets the range to mV (pH 213 only) CAL is equivalent to pressing the CAL key CFM is equivalent to pressing the CFM key UPC is equivalent to pressing the VC key DWC is equivalent to pressing the WC key MEM is equivalent to pressing the MEM key MRR is equivalent to pressing the MR key COM is equivalent to pressing the COMM key OFF sets the meter in standby mode
Commands requiring an answer:
pH? Causes the meter to send the pH reading ("Err 1" is sent if
out of range). If the range is set to mV, "Err 6" is sent.
MV? Causes the meter to send the mV reading ("Err 2" is sent if
out of range). If the range is set to pH, "Err 6" is sent.
TM? Causes the meter to send the temperature reading ("Err 3" is
sent if out of range).
These commands may be sent with either capital or small letters. Invalid commands will be ignored. The characters sent by the meter are always capital letters. When the meter receives an unknown or a corrupted command, it will send a character CAN (ASCII Code 24).
command>
17
<CR>
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