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sension 4
Instruction Manual
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Hach sension 4 Instruction Manual

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Laboratory
pH/ISE Meter
Instruction Manual
51775-18
© Hach Company, 1999. All rights reserved. Printed in the U.S.A. te/dk 1/02 2ed
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TABLE OF CONTENTS
CERTIFICATION ..................................................................................................................... 5
SAFETY PRECAUTIONS ....................................................................................................... 9
SPECIFICATIONS.................................................................................................................. 11
OPERATION........................................................................................................................13
SECTION 1 INTRODUCTION...................................................................................... 15
1.1 Unpacking the Instrument................................................................................................. 15
1.2 Standard Accessories......................................................................................................... 15
1.3 Keypad Description........................................................................................................... 16
1.4 Display Fields and Icons ................................................................................................... 18
1.5 Audible Signals................................................................................................................. 20
SECTION 2 INSTRUMENT SETUP............................................................................ 21
2.1 Instrument Description...................................................................................................... 21
2.2 Power Connections............................................................................................................ 21
2.3 pH/ISE and Temperature Probe Connections.................................................................... 21
2.3.1 pH/ISE Probe Connections...................................................................................... 21
2.3.2 Temperature Probe Connection ............................................................................... 22
2.4 Printer and Computer Connections................................................................................... 23
2.5 Turning the Meter On........................................................................................................ 23
2.6 Temperature Measurement................................................................................................ 23
2.7 Millivolt Measurements .................................................................................................... 24
SECTION 3 INSTRUMENT OPERATION ................................................................ 25
3.1 Setup Menu ....................................................................................................................... 25
3.1.1 Choosing the Probe Connector................................................................................ 25
3.1.2 Turning Display Lock Off and On........................................................................... 26
3.1.3 Selecting Temperature Units.................................................................................... 26
3.1.4 Selecting Measurement Resolution ......................................................................... 27
3.1.5 Selecting Auto Buf fer Recogniti on........................................................ ......... ......... 27
3.1.6 Selecting Stability Criteria....................................................................................... 27
3.1.7 Setting the Time....................................................................................................... 28
3.1.8 Setting the Month and Day...................................................................................... 29
3.1.9 Setting the Year........................................................................................................ 30
3.1.10 Setting the Print Interval........................................................................................ 30
3.2 Calibrating the Meter........................................................................................................ 31
3.2.1 Performing a Calibration Using pH 1.68, 4, 6.86, 7, 10, and 12.45 Buffers........... 31
3.2.2 Calibrating With Other Buffers ............................................................................... 32
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TABLE OF CONTENTS, continued
3.2.3 One-Point Calibration ............................................................................................. 33
3.3 ISE Calibration ................................................................................................................. 34
3.4 Reviewing Calibrations..................................................................................................... 36
3.5 Measuring Sample pH ...................................................................................................... 38
3.6 Measuring Samples Using ISEs........................................................................................ 38
3.7 Measuring Samples Using Standard Additions................................................................ 39
SECTION 4 STORING AND RECALLING DATA.................................................. 41
4.1 Storing pH/ISE Measurements ......................................................................................... 41
4.2 Recalling Stored Data....................................................................................................... 42
4.3 Erasing Data...................................................................................................................... 42
4.3.1 Erasing Single Data Points...................................................................................... 42
4.3.2 Erasing All Data Points........................................................................................... 43
SECTION 5 PRINTING/TRANSFERRING DATA.................................................. 45
5.1 Connecting to Printers/Computers.................................................................................... 45
5.1.1 Connecting with the RS232 Cable .......................................................................... 45
5.1.2 Connecting to a Printer............................................................................................ 45
5.1.3 Connecting to a Personal Computer........................................................................ 46
5.2 Sending Data to Printers/Computers................................................................................. 48
5.2.1 Printing Data at Intervals......................................................................................... 48
5.2.2 Sending Currently Displayed Data.......................................................................... 48
5.2.3 Sending Recalled Data Points ................................................................................. 49
5.2.4 Sending All Stored Data and the Average pH Value............................................... 49
5.2.4.1 Printed Data Format............................................................................................. 50
5.2.5 PC Control of the Meter through the RS232 Interface............................................ 50
SECTION 6 TROUBLESHOOTING............................................................................ 53
6.1 Introduction....................................................................................................................... 53
6.2 Shorting Test..................................................................................................................... 53
6.3 Error Codes And Errors.................................................................................................... 54
6.4 Meter Service Request Questionnaire............................................................................... 54
GENERAL INFORMATION........................................................................................... 55
REPLACEMENT PARTS....................................................................................................... 57
HOW TO ORDER .................................................................................................................. 59
REPAIR SERVICE................................................................................................................. 60
WARRANTY.......................................................................................................................... 61
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CERTIFICATION
Product Safety:
EMI Immunity:
Hach Company certifies this instrument was tested thoroughly, inspected and found to meet its published specifications when it was shipped from the factory.
The sension™4 Laboratory pH/ISE Mete r has been teste d and is
certified as indicated to the following instrumentation standards:
External Power Supplies Only: 115 VAC Supply: UL listed and CSA certified or 230 VAC Supply: CE marked per 73/23/EEC, VDE listed
Instrument tested with e xt er nal 230V, 50 Hz power supply. Per 89/336/EEC EMC: EN 61326:1998 (Electrical Equipmen t
for measurement, control, and laboratory use— EMC requirements) Supporting test records by Hach Company, certified compliance by Hach Company.
Standards include:
IEC 1000-4-2: 1995 (EN 61000-4-2:1995) Electro-Static Discharge Im munity (Criteria B)
IEC 1000-4-3: 1995 (EN 61000-4-3:1996) Radiated RF Electro-Magnetic Fields (Criteria B)
IEC 1000-4-4: 1995 (EN 61000-4-4:1995) Electrical Fast Transients/Burst (Criteria B)
IEC 1000-4-5: 1995 (EN 61000-4-5:1995) Surge (Criteria B) IEC 1000-4-6: 1996 (EN 61000-4-6:1996) Conducted
Disturbance Induced by RF Fields (Criteria A) IEC 1000-4-11: 1994 (EN 61000-4-11:1994) Voltage Dips,
Interruptions and Variations (Criteria B) ENV 50204:1996 Radiated Electro-Magnetic Field from
Digital Telephones (Criteria B)
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CERTIFICATION, continued Emissions:
Instrument tested with external 230V, 50 Hz power supply. Per 89/336/EEC EMC: EN 61326:1998 (Electrical Equipment
for measurement, control, and laboratory use— EMC requirements). Class B emission limits. Supporting test records by Hewlett Packard Hardware Test Center, Ft. Collins, CO (A2LA #0905-01), certified compliance by Hach Company.
Standards include:
EN 61000-3-2 Harmonic Disturbances Caused by Electrical Equipment
EN 61000-3-3 Voltage Fluctuations (Flicker) Disturbances Caused by Electrical Equipment
Additional Standards include: EN 55011 (CISPR 11) Emissions, Class B Limi ts
Additional Emissions Standard/s include:
CANADIAN INTERFERENCE-CAUSING EQUIPMENT REGULATION, IECS-003: Class A emission limits.
Supporting test records by Hewlett Packard Hardware Test Center, Ft. Collins, CO (A2LA #0905-01), certified compliance by Hach Company.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
FCC PART 15, Class “A” Limits:
Supporting test records by Hewlett Packard Hardware Test Center, Ft. Collins, CO (A2LA #0905-01), certified compliance by Hach Company.
This dev ice co mplies with P art 15 of the FCC Rules. Operat ion i s subject to the following two conditions:
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CERTIFICATION, continued
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digita l de vic e, pursua nt to P art 15 of th e FCC Rules. These l i mits are designed to pr o vide reasonable prote cti on against ha rmful interferenc e when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a resid ential are a is likely to cause harmful interference, in which case the user will be required to correct the interference at his own expense. The following techniques of reducing the interference problems are applied easily.
1. Disconnect the external power supply from sens
Laboratory pH meter to verify that the meter is not the source of interference.
2. Move the meter away from the device receiving
the interference.
3. Reposition the receiving antenna for the device receiving
the interference.
4. Try combinations of the above.
ion4
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8
SAFETY PRECAUTIONS
Section 2.2 on page 21 Section 2.3 on page 21 Section
2.4 on page 23
Section 5.1 on page 45
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SPECIFICATIONS
Specification subject to change without notice.
pH mode
Range -2.00 to 19.99 Resolution 0.001/0.01/0.1 (selectable) Slope range 45 to 65 mV/decade at 25 °C
ISE mode
Range 0.000 to 19900 Resolution Auto-ranging
Millivolt mode
Range -2000 to 2000 mV Resolution 0.1 mV Accuracy ±0.2 mV or ±0.05% of reading,
Temperature mode
Range -10.0 to 110 °C (can also display °F) Resolution 0.1 °C Accuracy ±0.3 °C from 0–70 °C
whichever is greater
±1.0 °C from 70–110 °C
Display: Custom LCD Inputs: 2 BNC; two 5-pin Hach pH /temperature or Hach
temperature probe; 2 pin-tip; (one combination input type for each of th e two channels or two half-cells per chan nel).
Outputs: Two-way RS232 Power Re quirements: 6–9 VDC provided by 120 V 50/60 Hz or
230 V, 50 Hz external power supply or a customer-provided supply with 50 mA output, 5.5-mm power plug with a 2.5 mm center post opening.
Installation Cate gory: II (for external power supplies) Input Impedance: >10
12
ohms
Instrument Drift: <40 µV/°C Input Bias Current: <±1 picoamp at 25 °C; <±4 picoamp over
full range
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SPECIFICATIONS, continued
Envi ronmental Requirements: 0 to 50 °C at 85%
non-condensing relative humidity. Enclosure is water resistant, chemical resistant, dust proof.
Dimensions: 25.4 x 15 x 8.37 (10.15 x 6 x 3.35 in.)
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OPERATION
DANGER
Handling chemical samples, standards, and reagents can be dangerous. Review the necessary Material Safety Data Sheets and become familiar with all safety procedures before handling any chemicals.
DANGER
La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse. Lire les Fiches de Données de Sécurité des Produits (FDSP) et se f amiliariser avec toutes les procédures de sécurité avant de manipuler tous les produit s chimiques.
PELIGRO
La manipulación de muestras química s, estándares y reactivo s puede ser peligrosa. Revise las fichas de seguridad de materiales y familiarícese con los procedimientos de seguridad antes de manipular productos químicos.
Das Arbeiten mit chemischen Proben, Standards und Reagenzien ist mit Gefahren verbunden. Es wird dem Benu tzer di eser Pr oduk te empf ohlen , sic h v or der Arbei t mit s ich eren Verfahrensw eisen und dem richtigen Gebrauch der Chemikalien vertraut zu machen und alle entsprechenden Materialsicherheitsdatenblätter aufmerksam zu lesen.
A manipulação de amostras, padrões e reagentes químic os pode ser perigosa. Reveja a fo l ha dos dados de segurança do material e familiarize-se com todos os procedimentos de segurança antes de manipular quaisquer produtos químicos.
GEFAHR
PERIGO
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SECTION 1 INTRODUCTION
Hach provides pH and ISE meters for applications from pH measurements to accurate Ion Sel ect ive Electrode work. This manual describes the operation and use of the Hach sens Portable p H/ISE/mV/Temperature Meter (see Figure 1).
This meter features a custom digital LCD display whic h simultaneously displays temperature and measurement results. This meter has all the features of a simple pH/ISE meter plus:
• two measurement channels
• a millivolt mode
• standard additions program
• automatic buffer recognition when in the pH mode
• pH averaging
• calibration review
ion™4
• datalogging
• bi-directional RS232 communication for printing results to a
computer or print er, or controlling the meter from a PC.
The meter is designed to be maintenanc e- fr ee. If the met er get s dirty, wipe the surface with a damp cloth. Use a cotton-tipped applicator to clean or dry the connectors if they get wet.
1.1 Unpacking the Instrument
Remove the instrument and accessories from the shipping container and inspect each item for any damage that may have occurred during shipping. Verify that all ite ms listed on the packing slip are included. If any items are missing or damaged, contact Hach Customer Service, Loveland, Colorado for instructions. Hach’s toll free phone number for customers within the United States is 800-227-4224. For customers outside the United States, contact the Hach office or distributor serving you.
1.2 Standard Accessories
• AC to DC wall adapter
• Instrument Manual
• Include electrode and related accessories (covered in the
electrode manual).
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SECTION 1, continued
1.3 Keypad Description
Fi gure 1 illustrate s the meter’s keypad. The description and function of each key are given in Table 1.
Figure 1 Hach sension4 Meter
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SECTION 1, continued
Table 1 Keys and Description
Key Description
Exit/Power On-Off Tur ns the instrument on; turns it off from a Reading mode.
Acts as a NO or Cancel key when the question mark icon is flashing. In Setup mode, backs up one step toward the Reading mode. Performs the following and returns to the most recent Reading mode:
• Exits the Store or Recall mode
• Aborts a calibration
• Exits a calibration review
Arrow Keys Scrolls between op tions in Setup mode.
Scrolls through data points in Store and Recall modes. Scrolls between the option to print or erase one data point and all data points. Changes the default temperature when a temperature probe is not in use.
READ/ENTER Key
Recall Key Recalls stored sample data (from Reading mode only). Store Key Stores the current (displayed) measurement (from Reading mode only). Erase Key Erases recalled data points. ISE/mV Key Toggles between ISE concentration value and mV in Reading, Calibr ation, and Cal
pH/mV Key Toggles between pH value and mV value in Reading, Calibration, and Cal
Std Addn Moves meter into program to use for standard additions. Print Key Sends current or recalled data to a printer or a computer via the RS232 port. Channel Toggles between channel 1 and 2. Will not toggle in Calibration, Cal Review, and
Accepts numerical input. Acts as a “YES” answer when the question mark is flashing. Allows user to edit a setup when the setup number is flashing. Accepts the current Setup option when that option is flashing. Initiates a new measurement when the meter has stabilized in the Display Lock
Enabled mode.
Review modes.
Review modes.
Recall modes.
Time Key In Reading mode, allows user to view the current time and date. In Recall Data
mode, it toggles between the time and date of the stored measurement. Cal Key Enters Calibration mode (from Reading mode only) Review Key Enters Calibration Review mode (from Reading mode only) Setup/CE K e y Enters Setup mo de (from Rea ding mode only) or clears a numeric entry when the
keypad icon is displayed.
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SECTION 1, continued
1.4 Display Fields and Icons
The display has two screens. The upper screen displays measurements or standard values, operation mode, slope, sample/default temperature, pH or mV units, error codes, and indicates if the meter reading is stable. The lower screen displays keys that are active.
Fi gure 2 shows the icons and screens displayed by the meter and Table 2 describes each element. All icons on the display will be
displayed if the power key is held down for several seconds.
Figure 2 sension4 Display
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SECTION 1, continued
Table 2 Main Display Elements
Item No. Description
1 Indicates meter is in Standard Addition mode. 2 (Cal
Review) 3Used with 4 Indicates the meter is measuring/reviewing a sample (sample # is displayed to the right). 5 Indicates data is being sent to a printer/computer. 6 Indicates recalled data that is currently displayed is being erased. 7 Indicates meter is in Setup mode. 8 Indicates all data points are being printed or erased. 9 Numerical field tha t dis pl ays Setup, Sampl e . an d Sta nda rd numbers when those words are
10 Flashing
11 Indicates the meter is measuring/reviewing a standard (standard # is displayed above). 12 Numerical field that displays the values of standards and samples, slope, pH or mV. 13 Indicates measurement units (pH, mV, mg/L, µg/L, ppm, ppb, M). 14 When
Indicates meter is in Calibration Review mode.
? to ask if user wants to store calibration, standard value, or sample value
displayed with the number. If Standard 1.
Standard and 1 are displayed, the meter is measuring
? and CAL indicate calibr ati on is nece ssary. Also a prompt to pres s the ENTER or
EXIT key.
Default is displaye d, the meter is using the def ault tempera ture valu e to calculate the
temperature correction for the pH value. 15 Temperature units (choice of °C or °F). 16 Indicates value displayed in small numerical field (item 20) is in millivolts. 17 Indicates channel 2 is in use. 18 Indicates an inactive key has been pressed and that function is not allowed. 19 Indicates ENTER key is active. 20 Numerical field that displays temperature value. 21 Indicates arrow keys are active. 22 Indicates the date is being set or displayed. 23 Indicates EXIT key is active. 24 Faulty probe connection or incorrect probe attached. Usually displayed with an error code. 25 Indicates numeric part of the keys is active. 26 Indicates channel 1 is in use. 27 NA 28 Display Lock icon. Indicates reading is locked after stability is achieved. 29 In setup mode, indicates whether Display Lock setting is 30 Indicates a meter function problem.
On or Off.
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