Hanna Instruments HI 902 Color User manual

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HI 902 Color
AUTOMATIC
POTENTIOMETRIC TITRATOR
Revision 2.00
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Dear customer,
Congratulations on choosing a Hanna Instruments product.
This guide has been written for HI 902 titrators with color display, USB interface and software
version 2.00 and higher.
Please read this Quick Start Guide carefully before using the instrument. This guide will
provide you with the necessary information for the correct use of the instrument.
The purpose of this guide is to present a quick overview of setting up and using the
instrument.
For detailed information illustrating the extensive capabilities of your titrator, please refer to
the Instruction Manual.
© 2010 Hanna Instruments
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.
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Contents
INTRODUCTION ..........................................................................................................4
SAFETY MEASURES.....................................................................................................5
TITRATOR CONNECTIONS .........................................................................................6
USER INTERFACE .........................................................................................................7
HOW TO SELECT YOUR LANGUAGE ............................................................................8
HOW TO USE THE CONTEXTUAL HELP .......................................................................8
METHODS ....................................................................................................................8
HOW TO CALIBRATE A pH ELECTRODE .....................................................................9
HOW TO PERFORM A TITRATION ..............................................................10
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INTRODUCTION
The HI 902 automatic titrator is designed to perform a wide variety of potentiometric titrations
with high accuracy, flexibility and reproducibility, allowing the user to obtain both accurate
results and high-speed analysis.
The titrators can perform fixed endpoint or equivalence point titrations by measuring the pH/
mV and temperature of the sample.
Titration reports and methods can be transferred to a PC via a USB interface, saved to a USB
storage device or printed directly from the titrator. An external monitor and keyboard can
also be attached for added convenience.
How can I find certain information?
-The Quick Start Guide will help the user learn how to operate the titrator
within a short period of time.
-The Instruction Manual provides a complete description of the operating
principles (user interface, general options, methods, titration mode, pH, mV
and ISE mode, maintenance, etc.).
-The Titration Theory outlines the basic concepts of titration.
-The contextual Help screens contain detailed explanations of every screen.
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SAFETY MEASURES
The following safety measures must be followed:
1. Always ensure that the power supply cable is connected to a grounded main power plug.
2. Never connect or disconnect the pump assembly with the titrator turned on.
3. Verify that the burette and the attached tubing are assembled correctly.
4. Always check that the titrant bottle and the titration beaker are placed on a flat, stable
surface.
5. Always wipe up spills and splashes immediately.
6. Avoid the following environmental working conditions:
• Severe vibrations
• Direct sunlight
• Atmospheric relative humidity above 95% non-condensing
• Environment temperatures below 10 ° C and above 40 ° C
• Explosion hazards
7. Have the titrator serviced by qualified service personnel only.
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TITRATOR CONNECTIONS
Front View
Rear View
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USER INTERFACE
Keypad
The titrator keypad has 29 keys grouped in five categories, as follows:
Display
The titrator has a 7.5’’ graphical backlit display. The main screen is shown below with short
explanations.
The user interface contains several screens. In each screen, many information fields are present
at the same time. The information is displayed in an easy-to-read manner.
Virtual option keys describe the function performed when the corresponding option key is pressed.
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HOW TO SELECT YOUR LANGUAGE
To change the language, press from the main
screen. Highlight the Language option and then press
. Using the and keys, select the language
from the options listed in the Set Language screen
and press .
Restart the titrator in order to apply the new language
setting.
HOW TO USE THE CONTEXTUAL HELP
Information about the titrator can be easily accessed by pressing . The contextual help
can be accessed at any time and it provides useful information about the current screen.
METHODS
The HI 902 titrator can store up to 100 methods.
Standard Methods
Each titrator is supplied with a package of standard methods. Standard method packs are
developed at Hanna Instruments laboratories to meet analysis requirements of specific
industries (e.g., water treatment, wine, dairy, etc.).
User Defined Methods
User defined methods allow the user to create and save their own methods. Each new
method is based on an existing method which is altered to suit a specific application.
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HOW TO CALIBRATE A pH ELECTRODE
To enter pH calibration mode, press then to enter pH mode. Once in pH
mode, press to enter pH calibration mode.
PREPARATION
Pour small quantities pH 4.01, pH 7.01 and pH 10.01 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 one for calibration.
CALIBRATION PROCEDURE
Three buffer entry types are available: Automatic, Semi-automatic and Manual Selection.
The default option is Manual Selection.
• If the instrument has been previously calibrated and calibration was not cleared, the old
calibration can be cleared by pressing .
Note: It is very important to clear calibration history when a new electrode is used
because most errors and warning messages that appear during calibration depend
on calibration history.
• Use the or to select pH 4.01 buffer solution.
• Use the second beaker of pH 4.01 buffer solution to rinse the pH electrode, temperature
probe and propeller stirrer.
• Immerse the pH electrode, temperature probe and propeller stirrer in the pH 4.01 buffer
solution. The pH electrode’s bulb must be completely immersed in the buffer solution and
the reference junction needs to be 5-6 mm below the surface. Add additional buffer if
necessary.
• Press to turn on the propeller stirrer.
• Once the reading has stabilized, press to update the calibration.
• Repeat this procedure for pH 7.01 and 10.01 buffer solutions.
• Press to accept and exit pH calibration mode.
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HOW TO PERFORM A TITRATION
Required Solutions
• Titrant - 500 mL of 0.1 M (mol/L) Sodium Hydroxide (NaOH) in a titrant bottle.
• Sample - 0.1 mol/L Hydrochloric Acid (HCl).
• Distilled or deionized water.
Note: Analytical grade reagents and water should be used for accurate results.
Priming the Burette
• Insert the aspiration tube in the titrant bottle and the dispensing tube in a waste
beaker.
• From the main screen press .
• Highlight the Prime Burette option and then press .
• Enter the number of burette rinses. At least 3 rinses are recommended.
• Press to start.
• The message “Executing...” will be displayed.
Note: Make sure you have continuous liquid flow inside the burette. For accurate results, the
aspiration tube, the dispensing tube and the syringe must be free of air bubbles.
Method Selection
For this analysis we will use the HI1009EN Neutralization w/ NaOH .
To select this method:
• Press . Use the and keys to highlight HI1009EN Neutralization w/ NaOH.
• Press .
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Setting Method Parameters
To display the method parameters, press . The View/Modify Method screen will be
displayed.
Only certain parameters can be changed.
For this titration, the NaOH titrant concentration and the size of the HCl sample need to be
entered.
To accomplish this:
• Highlight Titrant Conc. option, then press .
The Titrant Concentration screen will be displayed.
• Enter the correct value, then press .
• Highlight Analyte Size option, then press .
• Enter the volume of the sample (ex: 5 mL), then
press .
• Press , highlight Save Method option and then
press .
Setup Titration Report
Users can select the information that is stored for each titration.
To setup the titration report, follow the procedure below:
• From the main screen, press . The Data Parameters screen will be dis-
played.
• Highlight Setup Titration Report and press .
• Mark the fields to be included in the titration report with the “*” symbol. Use the
and keys to highlight a field and / to toggle the field.
• Press to save the customized report .
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Preparing the Sample
• Add 50 to 65 mL of distilled / deionized water to the titration beaker.
• Use a pipette or burette to add 5.0 mL of the sample (0.1M Hydrochloric Acid (HCl))
into the same beaker.
• Slide the stirrer assembly up.
• Place the beaker under the stirrer assembly.
• Lower the stirrer assembly until it rests on the positioning collar.
• Adjust the height of the stirrer assembly so it is as close as possible to the bottom of
the beaker.
• Adjust the level of the sample solution with distilled / deionized water so that the pH
electrode bulb is completely immersed in the sample solution and the reference
junction of the electrode is 5-6 mm below the surface.
Note: Make sure that the pH electrode, temperature probe and propeller do not touch each
other or the beaker.
Performing a Titration
• From the main screen, press . You will be prompted to enter the analyte size.
Enter 5 mL and press . The titrator will start the analysis.
• At the end of the titration, the message “Titration Completed” will appear on the
display with the final concentration of the analyte in the sample and the equivalence
endpoint volume.
Understanding the Displayed Information
During a titration the following screen is displayed:
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Viewing Graph During Titration
After a few doses are dispensed will become active. Press to display the
real-time titration graph.
The curves displayed are plots of the pH and the 1st derivative versus Titrant Volume (for
details, see the Instruction Manual).
The two graphs are scaled to fit in the same screen window. Press to change the y-axis
scale to either the pH values or the 1st derivative values.
Titration Termination
The titration is normally terminated when the first equivalence endpoint is detected according
to the selected algorithm. To ensure the correct detection and interpolation of the equivalence
endpoint, the titrator will dispense a few additional doses after the endpoint was reached.
The titration result can be displayed either in the main screen or in the Graph of Titration
Data
screen:
When the titration has ended,the titrator will display the equivalence endpoint volume and the
final concentration of the analyte together with the Titration Completed message.
To view the titration graph and/or results, press .
When the titration ends, an “x” will mark the endpoint on the pH versus titrant volume curve
in the Graph of Titration Data screen. The value of the endpoint volume is also displayed
next to the endpoint.
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Results
The results obtained from a titration are stored in a report file that can be viewed, transferred
to a USB Storage Device or PC, or printed.
Viewing the last titration data
• From the main screen, press . The Data Parameters screen will be displayed.
• From the Data Parameters screen highlight the Review Last Titration Report option and
press . The Review Result screen will be displayed.
• Use the and keys to display information related to the last titration performed.
See titration report on page 15.
Printing the titration report
Connect a DOS / Windows compatible printer directly to the DB 25-pin connector located on
the back of the titrator.
Note: When connecting the printer, please turn off the titrator and the printer.
Printing out the report:
• From the Review Report screen, press .
•During the information transfer to the printer, the message “Printing” will be
displayed on the screen.
• Press to return to the Data Parameters screen.
• Press again to return to the main screen.
Saving data to USB Storage Device
This feature allows saving the results of titrations or pH / mV / ISE logging sessions on a USB
storage device.
• From the main screen, press ,the General Options screen will be displayed.
• Highlight the Save Files to USB Storage Device option using the and keys.
•Insert the USB storage device into the USB socket.
• Press , the List of Files on Titrator
screen will be displayed.
• Use the or keys to select the file type:
“report files”.
• Press to transfer all available reports to
the USB storage device, or highlight the name
of the report file to be transferred and press
.
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• Transferring a report file will automatically transfer the corresponding log file and
titration graph (.BMP file, if applicable).
• Press to return to the General Options screen.
• Press again to return to the main screen.
Titration report
While scrolling with the and keys, the fields below can be seen on the titrator
display or printed. The same information is available on the saved report file (Ti_00007.rpt
in this example).
Titration Report
Method Name: Neutralization w/NaOH
Time & Date: 10:43 Apr 16, 2010
Titration ID: Ti_00007
Standardization Data
Buffer Potential Efficiency Temperature
Time and Date
4.006pH 169.9mV 100.7% A 22.00C
10:20 Apr 16, 2010
7.020pH -7.8mV 96.5% A 22.00C
10:23 Apr 16, 2010
10.040pH -178.6mV 96.5% A 21.90C
10:25 Apr 16, 2010
GLP & Instrumentation Data
Sample Name: Sample HCl-1
Company Name: Hanna Instruments
Operator Name:
Electrode Name: HI 1131 NO -2
Field 1: Any text
Field 2: Any text
Field 3: Any text
Titrator Software Version v2.00
Base Board Software Version: v2.00
Pump 1 Software Version: v1.4
Base Board Serial Number: 01040409
Analog Board Serial Number: 30040409
Pump 1 Serial Number: 70040207
Factory Calibration Date: Jan 28, 2010
Method Parameters
Name: Neutralization w/NaOH
Method Revision: 1.0
Pump Configuration:
Titrant Pump : Pump 1
Analog Board: Analog 1
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Stirrer Configuration: Stirrer 1
Dosing Type: Dynamic
min Vol: 0.050 mL
max Vol: 0.500 mL
delta E: 20.000 mV
End Point Mode: pH 1EQ point, 1st Der
Recognition Options:
Threshold: 50 mV/mL
Range: NO
Filtered Derivatives: NO
Pre-Titration Volume: 0.000 mL
Pre-Titration Stir Time: 15 Sec
Measurement Mode: Signal Stability
delta E: 1.0 mV
delta t: 2 Sec
t min wait: 2 Sec
t max wait: 15 Sec
Electrode Type: pH
Calculations: Sample Calc. by Volume
Titrant Name: NaOH
Titrant Conc.: 0.1000 M (mol/L)
Analyte Size: 5.000 mL
Analyte Entry: Manual
Maximum Titrant Volume: 20.000 mL
Stirring Speed: 1400 RPM
Potential Range: -2000.0 to 2000.0 mV
Volume/Flow Rate: 25 mL / 50.0 mL/min
Signal Averaging: 1 Reading
Final Result Format: X.XX
M (mol/L) —> M (mol/L)
V mol mol
-*—*—-
L mol
—————
mL L
—*———
1000mL
V = volume dispensed in liters.
0.100 mol/L -> titrant conc.
1.000 mol/mol -> (sample/titrant)
5.000 mL -> sample volume
Nr Volume[ml] mV pH Graphic Temp[0C] Time
00.000 235.2 2.857 0.0 A19.1 00:00:00
10.050 234.6 2.866 -10.2 A19.0 00:00:21
20.100 233.9 2.880 -15.8 A19.1 00:00:27
30.200 232.2 2.908 -16.7 A19.1 00:00:39
40.390 231.1 2.928 -6.0 A19.1 00:00:45
50.590 228.6 2.970 -12.3 A19.1 00:01:04
60.790 226.9 3.000 -8.7 A19.1 00:01:20
70.990 225.5 3.024 -6.9 A19.1 00:01:37
81.190 224.7 3.038 -4.0 A19.1 00:01:43
91.390 223.9 3.051 -4.0 A19.1 00:01:49
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10 1.590 223.0 3.066 -4.3 A19.1 00:01:55
11 1.790 222.1 3.082 -4.6 A19.1 00:02:01
12 1.990 221.2 3.098 -4.6 A19.1 00:02:06
13 2.190 220.1 3.115 -5.1 A19.1 00:02:11
14 2.390 219.0 3.134 -5.6 A19.1 00:02:17
15 2.590 217.8 3.155 -6.0 A19.1 00:02:23
16 2.790 216.5 3.177 -6.6 A19.1 00:02:29
17 2.990 215.1 3.202 -7.3 A19.1 00:02:34
18 3.190 213.4 3.231 -8.4 A19.1 00:02:40
19 3.390 211.5 3.263 -9.3 A19.1 00:02:46
20 3.590 209.2 3.302 -11.4 A19.1 00:02:51
21 3.790 206.6 3.348 -13.4 A19.1 00:02:57
22 3.990 203.2 3.406 -16.8 A19.1 00:03:02
23 4.190 198.9 3.479 -21.4 A19.1 00:03:08
24 4.390 193.1 3.578 -29.0 A19.1 00:03:14
25 4.556 186.2 3.697 -41.7 A19.1 00:03:20
26 4.670 179.6 3.810 -57.8 A19.1 00:03:25
27 4.753 172.9 3.925 -81.2 A19.1 00:03:31
28 4.812 166.4 4.036 -110.0 A19.2 00:03:37
29 4.856 160.1 4.144 -143.5 A19.2 00:03:43
30 4.889 153.7 4.253 -189.9 A19.2 00:03:54
31 4.915 147.1 4.367 -259.9 A19.2 00:04:00
32 4.934 141.0 4.471 -322.7 A19.2 00:04:11
33 4.949 135.2 4.571 -388.0 A19.2 00:04:17
34 4.964 127.5 4.702 -512.0 A19.2 00:04:23
35 4.979 117.3 4.877 -680.0 A19.2 00:04:29
36 4.994 104.2 5.102 -875.3 A19.2 00:04:35
37 5.009 87.9 5.381 -1088.0 A19.2 00:04:41
38 5.024 69.6 5.695 -1221.3 A19.2 00:04:50
39 5.039 51.2 6.010 -1226.0 A19.2 00:05:08
40 5.054 31.6 6.344 -1301.3 A19.2 00:05:36
41 5.069 7.3 6.762 -1625.3 A19.2 00:06:07
42 5.084 -37.9 7.557 -3010.0 A19.2 00:06:38
43 5.099 -120.0 9.024 -5476.0 A19.2 00:06:48
44 5.114 -144.7 9.464 -1642.7 A19.2 00:06:54
45 5.129 -158.2 9.705 -900.7 A19.2 00:07:01
46 5.144 -168.1 9.883 -664.0 A19.2 00:07:08
Titration Results
Method Name: Neutralization w/NaOH
Time & Date: 10:43 Apr 16, 2010
Analyte Size: 5.000 mL
End Point Volume: 5.090 mL
pH Equivalence Point: 8.131
Results: 0.10 meq/L
Initial & Final pH: 2.857 to 9.884
Titration Duration: 7:09 [mm:ss]
Operator Name:
Analyst Signature: _______________________________
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QS 902C
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INSTRUCTION MANUAL
HI 902 Color
AUTOMATIC
POTENTIOMETRIC TITRATOR
Revision 2.00
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2
Dear customer,
Congratulations on choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instrument. This manual will
provide you with the necessary information for the correct use of the instrument.
This instruction manual has been written for the HI 902 titrators with color display, USB
interface and software version 2.00 or later.
© 2010 Hanna Instruments
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.
[email protected]
www.ponpe.com