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sension 4
Instruction Manual
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Hach sension 4 Instruction Manual

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Page 1
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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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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SECTION 1, continued
Table 2 Main Display Elements (Continued)
Item No. Description
31 Indicates the displayed number is the electrode slope. 32 Indicates Time is being set or displayed. 33 When on or flashing,
disappears, the reading is stable. 34 Indicates meter is in recall mode and the data displayed is stored data. 35 (CAL) Indicates meter is in Calibration mode. If the
Stabilizing... indicates signal from sample is not yet stable. When it
? is flashing, calibration is necessary.
1.5 Audible Signals
The meter will beep under certain conditions:
• a non-functional key press is made (one beep)
• when display lock is enabled and measurement stability is
reached during reading mode (three beeps)
• any time measuremen t stability is reached during calibration
mode, regardless of the Display Lock setting
• to signal an error condition (two beeps)
• if the number entry and a press of the ENTER key causes two
beeps, the meter will automatically return to the beginning of number entry.
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SECTION 2 INSTRUMENT SETUP
2.1 Instrument Description
This sension™4 Lab o ra tor y pH/IS E/m V meter is des ign ed for
laboratory use and operates on 115/230 VAC power. Two channels are available for electrode connection.
The meter measures from -2.0 to 19.99 pH units and the sample temperature. Displayed pH values are temperature corrected using the measured sample temperature or a default temperature setting. To display mV and pH values, press the toggle between the units.
In the ISE mode, the meter measures from 0 to 19900 with the highest resolution as ten thousandths (0.0001). To display mV and concentrati on values, press the the units.
2.2 Power Connections
A 115 or 230 AC to DC converter is required to power the meter. Plug the power jack of the adapte r into the meter power conn ector (see Figure 3). Then plug the adapter into the wall.
ISE/mV key to togg le between
pH/mV key to
2.3 pH/ISE and Temperature Probe Connections
2.3.1 pH/ISE Probe Connections
Electrodes may be simult aneousl y atta ched to t he 5-pin a nd BNC connectors of the same channel as long as they are not in contact with the s ame solution. To select either of t he connectors for measurement, go to
Five-pin Connec tors
Attach pH electrodes with 5-pin connectors to the meter input by lining th e pins up with the holes in the m eter port (see Figure 3). Push towards the instrument.
BNC Connectors
For pH or ISE probes with BNC connectors, slide the connector into the input. Push towards the instrument and turn the metal sleeve clockwise to lock into position. Do not use a pH probe with tem perature sensor to measure temperature while using a n ISE probe.
Setup 1 and choose one.
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SECTION 2, continued
Pin-type Connectors
When using half-cells, conne ct reference electrodes with p in tip connectors by pushing the connector straight into the center reference input.
Note: If using a combination electrode with a BNC or 5-pin connector,
the reference pin-tip jack is not used.
Figure 3 sension4 Power, RS232, and Probe Connections
2.3.2 Temperature Probe Connection
Hach pH electrodes with the 5-pin connector have the temperature sensing unit included in the electrode probe and require only the 5-pin connector. If using a pH electrode with BNC connector, connect the Hach Temperature Probe (Cat. No. 51980-00) to the 5-pin connector on the meter (see Figure 3). The user can also measure the temperature manually and enter the value as the default temperature on the meter (see Section 2.6 on page 23). Do not use a pH probe with temperature sensor to measure temperature while using an ISE probe.
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SECTION 2, continued
2.4 Printer and Computer Connections
The meter can send data to a computer or printer via the 9-pin serial port on the meter (see Figure 3). The printer cable and computer cable are d ifferent. The printer cable is a 9-pin to 25-pin cable and the computer cable is a 9-pin to 9-pin cable. Be sure to use the correct cable.
The meter can print to serial printers without an adapter. For parallel printers, a converter and cable adapter are required. The Citizen PN60 printer (Cat. No. 26687-00) requires a special Citizen adapter (supplied with the printer). Pressing the key will send the currently displayed data to the printer or the user can enable the autoprint function (see 3.1.10 on page 30). The data may be eit her a curr ent measurement or recalled data.
T o commun icate with a computer , conn ect the 9-pin seria l port on the meter to a 9-pin serial port of the computer using a 9-pin to 9-pin cable. Pressing the displayed data to the computer. The data may be either a current measurement or recalled data. To send commands from a computer, see the Table 6 on page 51.
PRINT key will send the currently
PRINT
2.5 Turning the Meter On
After plugging the correct p ower adapter into the wall, turn the instrument on using the side of the keypad). Press the key once to power the instrument up. The display will show the software version number, then move to the Reading mode.
2.6 Temperature Measurement
The meter displays temperatur e in the ran ge of -10.0 to +110 °C simultaneously with sample results. If a temperature probe is properly connected, actual temperature measurements are displayed in the temperature/mV field.
The meter requires a temperature to calculate temperature­corrected pH readin gs. The meter uses tempera ture data from one of three sources:
• The temperature sensor in the sample
• The factory default setting (20 °C)
I/O/EXIT key (located on the upper left
• A user-entered default setting
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SECTION 2, continued
If a temperature probe is connected properly, the meter will display the current sample temperature and will not allow the temperature to be manually set.
To manually set the temperature
When a temperature probe is not used to supply the temperature for pH temperature compensation, th e default te mperature (20 °C) will be used. In either case,
Default will be displayed
above the temperature. To change the defaul t temperature, first put the meter in Readi ng
or Calibration mode . Pr ess the arrow keys to increase or decr eas e the displayed default temperature value to the desired temperature. The value adjusts in 0.1 °C (0.1 to 0.2 °F) increments. To scroll rapidly, hold the arrow key down.
Note: Acceptable temperatures range from -10 to 110 °C.
To change the units of temperature measurement, see Section
3.1.3 on page 26.
2.7 Millivolt Measurements
The meter can be used to measure absolute millivolts (mV). To display a c urrent mi lli v olt reading, press t he The mV value is displayed with key again to return to pH or ISE measurement units.
Absolute millivolts are displayed with 0.1 mV resolution in the range of -2000.0 to +2000.0. The millivolt mode is useful when measuring oxidation-reduction potential, performing potentiometri c titrat ions, or p reparing c alibration curves . Detailed instructions for any Hach electrode are given in the electrode instruction manual. T itr ation inst ructions are i ncluded in the Hach ORP Electrode Instruction Manual, or in standard analytical chemistry texts.
pH/mV or ISE/mV key .
mV in the units field. Press the
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SECTION 3 INSTRUMENT OPE RATION
3.1 Setup Menu
The sension™4 Laboratory pH/ISE meter has a setup menu for
each channel which allows the analyst to choose options for connector choice, display lock, temperature units, display resolution, automatic buffer recognition, time, date and others (see Table 3). Each channel can have separate setup options except date and time.
To access the Setup menu, press the
SETUP key. The arrow icons
will be displayed, indicating that additional options are available within the menu. Press the up or down arrow key to scroll to the desired option, then press
EXIT until the meter retu rns to Reading mode.
ENTER. To exit the setup menus, press
When using the Setup menu, the screen will display a number in the upper right numerical field, indicating which option is being changed. Table 3 describes these options.
Table 3 sensION4 Setup Options
Setup
Number
1 Use BNC or 5-pin connector 2 Display lock (On or Off) 3 Temperature units (°C or °F) 4 pH measurement resolution (0.0, 0.00, or 0.000) 5 Buffer auto recognition (6.86 or 7.00)
Setup Description
3.1.1 Choosing the Probe Connector
6 Stability criteria 7 Time of day (24-hour clock) 8 Date (mm/dd) 9 Year (4 digits)
10 Print interval settings
This setup ensures the potential from the appropriate electrode is detected b y th e met er. Do not use both a pH electrode and an ISE electrode from the same channel in the same solution. Both can be connected if they are in separate solutions, but only the electrode on the selected connector (BNC or 5-pi n) will be activ e.
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SECTION 3, continued
1. From the reading mode, press SETUP.
2. The
Setup icon and the number 1 (flashing) will be displayed.
Change the connec tor c hoice b y pressi ng the selection between
3. When the desired option is selected, press
the reading mode.
3.1.2 Turning Display Lock Off and On
Setup 2 is the Display Lock option. This feature stops measurement reading fluctuation on the display once a stable reading is reached. The default setting is Off.
When this feature is not used, th e measurement value may continue to fluctuate.
1. From the reading mode, press
2. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow once so the Setup number is 2.
ENTER; this toggles
BNC and 5 pin.
EXIT to return to
SETUP.
3. Change the Display Lock status by pressing ENTER; this
toggles the Display Lock between off and on. When the Display Lock is disabled, the Display Lock icon and displayed. When this feature is enabled, the Display Lock icon is displayed when the sta bilizatio n criteria are met.
4. When the desired option is selected, press
the reading mode.
3.1.3 Selecting Temperature Units
1. From the reading mode, press SETUP.
2. The
3. Change the temperature unit by pressing
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow twice so the Setup number is
toggles the temperature units between °C and °F. The default is °C.
Off are
EXIT to return to
3.
ENTER; this key
4. When the desired option is selected, press
EXIT to return to
the reading mode.
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SECTION 3, continued
3.1.4 Selecting Measurement Resolution
The meter can display pH measurement values to tenths (0.0), hundredths (0.00) or thousandths (0.000). The default is hundredths. The choice of resolution affects the stability criteria.
1. From the reading mode, press SETUP.
2. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is
3. Change the resolution by pressing
between the three resolution options.
4. When the desired option is selected, press EXIT to return to
the reading mode.
3.1.5 Selecting Auto Buffer Recognition
The sension4 Meter is designed to auto-recognize and calibrate
on 1.68, 4.01, 6.86 or 7.00, 10.01, and 12.45 pH buffers. The only selection option for pH buffer auto recognition is
choosing 6.86 or 7.00. The default is pH 7.00. To change this option:
1. From the reading mode, press
2. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is
4.
ENTER; this toggles
SETUP.
5.
3.1.6 Selecting Stability Criteria
3. Change the buffer value by pressing
ENTER; this toggles the
between the choices 6.86 and 7.00.
4. When the desired option is selected, press
EXIT to return to
the reading mode.
The meter is designed to recognize a stable ISE reading based on the rate of drift in mV/min (criteria are automatically selected for pH measu rement based on resolution). If the elec trode voltage is drifting s l ower than the chosen mV stability criteria, the disp lay will show a stabilized r eading. If the electrode voltage is drifting faster than the chosen mV stability criteria, the display will continue to display
Stabilizing... and measuremen t values
will fluctuate.
27
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SECTION 3, continued
The default stabilit y drift rate is 0.500 mV/min. Lower stability criteria (i.e., 0.300 mV/min) will require longer stabilization times, but the measur emen t will be more precise . Higher st abili ty criteria will require shorter stabilization times, but measurements may be less precise.
To change this option:
3.1.7 Setting the Time
1. From the reading mode, press
SETUP.
2. The Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is 6.
3. Change the stability criteria by pressing ENTER. The display
will show _ _ _ _. The numbered keypad will become active.
4. Enter the desired mV value using the keypad. Press ENTER
when entry is complete.
5. If a number entry error occurs, start over by pressing
SETUP/CE.
6. When the desired value has been accepted , press EXIT to
return to the Reading mode.
1. From the reading mode, press SETUP.
2. The
3. Change the time by pressing
4. Press the desired number key for the left most digit. The
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is
ENTER. The main display will
change to
_ _:_ _, with the left place holder flashing. The
7.
numerical keypad will become active.
meter uses a 24-hour military clock (12 a.m. = 00:00; 1 p.m. = 13:00). All four digit places must have a number. If the left-mos t digit(s) is not necessary, use zero for t he value (i.e., 08:15 for 8:15 a.m. or 00:30 for 12:30 a.m.).
28
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SECTION 3, continued
5. Once a number ke y is presse d, the ne xt digit plac e holder wil l
flash. Continue to enter the desired numbers until all four places have a value. Press
6. If a number entry error occurs, start over by pressing
SETUP/CE.
7. When the desired value has been accepted , press EXIT to
return to the Reading mode.
3.1.8 Setting the Month and Day
1. From the reading mode, press SETUP.
ENTER.
2. The
3. Change the date b y pressin g
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is will show
change to
Date and a date near the bottom of the display.
ENTER. The numeric display will
_ _/_ _, with the left place holder fl ashing . The dat e
8. The display
format has two places for the month on the left side of the slash and two place s for the day of the month on th e right side of the slas h.
4. The numerical keypad will become active. Press the desired
number key for the left most digit. All four digit places must have a number. If the left- most digit is not nec essary, use zero for the value (i.e., 02/06 is February 6).
5. Once a number ke y is presse d, the ne xt digit plac e holder wil l
flash. Continue to enter the desired numbers until all four places have a value. Press
ENTER.
6. If an number entry error occurs, start over by pressing
SETUP/CE.
7. When the desired value has been accepted , press
return to the Reading mode.
29
EXIT to
Page 30
SECTION 3, continued
3.1.9 Setting the Year
1. From the reading mode, press SETUP.
2. The
Press the up arrow until the Setup number is will show
3. Change the year by pressing
change to numerical keypad will become active.
4. Press the desired number key for the left most digit. Once a
number key is pressed, the next digit place holder will flash. Continue to enter the desired numbers until all four places have a value. Press
5. If a number entry error occurs, start over by pressing
SETUP/CE.
6. When the desired value has been accepted , press
return to the Reading mode.
3.1.10 Setting the Print Interval
The default for this option is Off. To transfer data when this option is disabled, press the PRINT key. When this option is enabled, the meter will automatically send data at the selected interval to a computer or printer via the RS232 port.
Setup icon and the number 1 (flashing) will be displayed.
9. The display
Date and a year in the main display.
ENTER. The main display will
_ _ _ _, with the left place holder flashing. The
ENTER to accept the value.
EXIT to
1. From the reading mode, press
2. The
3. To change the print interval, press ENTER.
4. Use the arrow keys to scroll through the options:
5. Press ENTER to select the desired option. Press EXIT to leave
SETUP.
Setup icon and the number 1 (flashing) will be displayed.
Press the up arrow until the Setup number is
10. The display
will show the current setting.
Off 30 sec 0:01 min (1 minute), 0:05 min., 0:20 min. 1:00 hr, 2:00 hr, 6:00 hr
the setup.
30
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SECTION 3, continued
3.2 Calibrating the Meter
The sension4 Meter is designed to auto-recognize and calibrate
on 1.68, 4.01, 6.86 or 7.00, 10.00, and 12.45 pH buffers. Calibrating with buffers that have pH values other than these requires a modified procedure. Each channel requires independent calibration.
Hach recommends a daily t wo-poi nt calib ration us ing b uf fer s that bracket the sample pH. This will verify the electrode is working properly and allow the slope value to be stored.
3.2.1 Performing a Calibration Using pH 1.68, 4, 6.86, 7, 10, and 12.45 Buffers
1. Select the desired channel. If using a probe without a
temperature sensor, see Sections 2.3.2 on page 22 and 2.6 on page 23 for information about obtaining and using a default temperature.
2. Prepare p H buffers that bracket the sa mple pH ac cording to
the electrode instr uction man ual. the m eter can be calibrated with two to five autorecognized buffers.
Note: Use a 6.86 or 7.0 pH buffer for the mid-range buffer. To view or
change the setting for the mid-range buffer see Section 3.1.5.
Note: The pH values for the buffers are given for 25 °C. If the sample
temperature i s n ot 25 °C, the pH val ues d isp layed fo r the buffers wil l reflect the correct pH value for the sample temperature.
3. Press I/O/EXIT to turn the instrument on. Select the desired
channel. If necessary, press the reading mode (
pH will be displayed).
4. From the pH reading mode, press
appear in the upper display area, along with
PH/mV key to get into t he pH
CAL. CAL and ? will
Standard and 1.
5. Place the pH electrode in one of the buffers.
6. Press
READ/ENTER. The temperature and pH values will be
updated until a stable reading is reached.
Note: If the meter is measu ring in pH mo de, it automati cally m ov es to the
next calibration step when stabilization is reached (indicated by three beeps). If measuring in mV mode, the three beeps will still sound when the stabilization occurs, but you must press
ENTER to
31
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SECTION 3, continued
accept the reading. This lets the operator control the acceptance point of the buffer.
7. When the reading has been accepted, the standard number
will change to
2.
8. Remove the probe from the first buffer and rinse with
deionized water. Place the probe in the second buffer.
9. Press
READ/ENTER. The temperature and pH values will be
updated until a stable reading is reached.
10. When the reading has been accepted, the standard number
will change to
11. Repeat steps 8 and 9 for the third, fourth, or fifth buffer or
press EXIT. The slope value and the Store and ? icons w ill appear . Verify the slope v alue is within the range s specif ied in the electrode manual.
12. To save the calibration and return to the reading mode, press
ENTER. To exit the calibration without saving it and return to
the reading mode, press
3.2.2 Calibrating With Other Buffers
1. Select the desired channel. If using a probe without a
temperature sensor, see Sections 2.3.2 on page 22 and 2.6 on page 23 for information about obtaining and using a default temperature.
3.
EXIT.
2. Prepare two pH buffers that bracket the sample according to
3. Turn the instrument on. Select the desired channel. If
4. From the reading mode, press
the electr ode instruction man ual.
necessary, press the mode (
pH will be displayed).
appear in the lower left part of the display.
PH/mV key to get into the pH reading
CAL. Functional keys will
CAL and ? will
appear in the upper display area, along with The numeric keypad will become active.
32
Standard and 1.
Page 33
SECTION 3, continued
5. Place the pH electrode in a buffer (starting with the lowest pH
makes it ea sy to keep track).
6. Enter the pH value of the buffer using the number keys and
press
ENTER. A flashing underscore (__) indicates wh ere the
next number will be placed. It is not necessary that all four places have a number entered in them.
7. The temperature and pH value will be updated until a stable
reading is reached.
8. When the reading has stabilized, the standard number will
change to
2. If measuring in the mV mode, press ENTER
to continue.
9. Rinse the electrode and place it in the next buffer.
10. Enter the pH value of the buffer using the number keys as
describe d above. Press ENTER.
11. When the reading has stabilized, the standard number will
change to 3. Repeat steps 9–10 for other calibration buffers.
12. Press
appear . Verify the slope v alue is within the ra nges specif ied in the electrode manual.
13. To save the calibration and return to the reading mode, press
ENTER. To exit the calibration without saving it a nd return to
the reading mode, press EXIT.
3.2.3 One-Point Calibration
The one-point calibration is used to adjust the calibration offset and cannot be done unless a prior calibration using at least two points is being used for measurements.
1. From the reading mode, press
will be displayed.
2. Place the electrode in a pH calibration buffer.
EXIT. The slope v al ue and the Store and ? icons will
CAL. Cal, 1, ?, and Standard
3. Press
READ/ENTER. The temperature and pH values will be
continuously updated until a stable reading is reached.
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SECTION 3, continued
4. When the reading has stabilized, the standard number will
change to
2.
3.3 ISE Calibration
5. Press
and
EXIT. The adjusted offset value, the slope, and the Store
? icons will appear. Verify the offset value (isopotential
point) is within the range specified in the electrode manual.
6. To save the adjusted calibration and return to the reading
mode, press ENTER. To exit the calibration without saving it and return to the reading mode, press
EXIT.
Calculation for ISE values does not require temperature compensation, so a temperature probe is not necessary for ISE testing. However, a temperature probe will still function properly and display the correct sample temperature. Use the 5-pin temperature probe available from Hach, Cat No. 51980-00.
1. Prepare standards according to the electrode instruction
manual or the instructions for the standard. Use two to five standards for calibration. Pour 25 mL of each standard into a 50-mL beaker.
2. Turn the instrument on. Select the desired channel and the
BNC connector (Setup 1). If necessary, press the
ISE/mV key
to get into the ISE reading mode (the last concentration units entered
3. Press
of the display.
will be displayed).
CAL. Functional keys will appear in the lower left p art
CAL, ?, and flashing units will appear.
4. To change the units, use the arrow keys to scroll to the
desired choice (g/L, mg/L, µg/L, ppm, ppb, M). Press
ENTER.
5. Add ionic strength adjustor to 25 mL of the least
concentrated sta nda rd.
Standard, and 1 will appear in the upper display. If the meter
6.
has been calibrated, the last value for standard 1 will appear. The numeric keypad will become active.
7. Place the ISE electrode in the standard with the lowest value.
While measuring, stir the solution slowly and steadily.
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SECTION 3, continued
8. To enter or change th e standar d’s concentration value, use the
number keys, then press
ENTER. A flashing underscore (__)
indicates where the next number will be placed. It is not necessary that al l four places have a num ber ente red in them.
To retain the standard concentration value, just press ENTER.
Note: Once a ne w v alue is ente red, the meter w ill assume the calibrati on
values have changed and will no longer display values for other standards from the previous calibration.
9. The concentration value selected will be displayed until a
stable reading is reached. mV values may be observed during calibration by pressing the
Note: If the meter is measuring in ISE mode, it automatically moves to
the next calibration step when stabilization is reached (indicated by three beeps). If measuring in mV mode, the three beeps will still sound when the stabilization occurs, but you must press accept the reading. This lets the operator control the acceptance point of t he standard.
ISE/mV key.
ENTER to
10. When the reading has stabilized, the standard number will
change to 2. The previous value for standa rd 2 will be displayed if a new value for Standard 1 has not been entered.
11. Add ISA to 25 mL of the standard with the next highest
concentration.
12. Rinse the electrode and place it in the standard with the next
highest concentration. While measuring, stir the solution slowly and st eadily.
13. Enter or change the standard’s concentration value using the
number keys as described above. Press
14. To retain the standard concentration value, just press
ENTER.
ENTER.
15. When the reading has stabilized, the standard number will
change to 3. Repeat steps 10–12 for each st andard . The me ter will accept up to seven ISE calibration points and five pH calibration points.
16. After the last standard is measured, press
? icons will appear.
35
EXIT. The Store and
Page 36
SECTION 3, continued
17. To save the calibration and return to the reading mode, press
ENTER. To exit the calibration without saving it and return to
the reading mode, press EXIT.
18. After the calibration is stored, the meter is immediately ready
to begin measuring samples. See Section 3.6 on page 38.
3.4 Reviewing Calibrations
pH calibrations result in a linear calibration curve, so only one slope v alue and i ts corre lation co ef fi cient (r Review mode. ISE calibration result in a linear, piecewise calibration for each pair of standards (see Figure 4). Therefore, the meter will di splay a sl ope for ea ch “calibration” between each pair of standards. The first slope displayed is for Standards 1 and
2. The second slope displayed is for standards 2 and 3, and so forth. Use the arrow keys to scroll to these values.
The mV values for the standards can be viewed by pressing the
ISE/mV or pH/mV key. This toggles between concentration and
mV values.
Figure 4 pH and ISE Calibration Curves
2
) are displayed in Cal
pH
36
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SECTION 3, continued
1. Select the desired channel. From the pH or ISE reading
mode, press the
REVIEW key. T o re vie w th e pH calibr ation, be
sure the meter is in pH mode. To review the ISE calibration, be sure the met er is in ISE rea ding mode . View mV value s b y pressing the
pH/mV or ISE/mV key.
2. The meter will display the time the ca libration was stored.
Press the up arrow key once.
3. The display will show the standard number, standard
concentration and temperature. Press the up arrow once .
4. The meter will continue to scroll through the standard
information wit h each pre ss of the u p arro w k ey. When all the standards have been displayed, press the up arrow key again.
5. For pH calibrations, The meter will display the slope and
offset of the calib rat ion c urv e. Pres s the up ar row again to see
2
the r
value for the curve. Skip to step 8 if reviewing a
pH calibration. For ISE cali brati ons, the mete r will displa y the sl ope v al ue of
the curve between standards 1 and 2. Press th e up arr ow o nce.
6. The meter will display the slope value for the curve between
standards 2 and 3.
7. Each press of the up arrow will display the remaining slope
values until all the slope values have been displayed.
8. To exit Cal Re view mode, press
EXIT. To review any st andard
or slope information again, press the down arrow.
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SECTION 3, continued
3.5 Measuring Sample pH
See instructions in the electrode manual for more information and specific steps for using the electrode.
1. Place the electrode in the sample. Press READ/ENTER.
Stabilizing... will be displayed, along with the sample
temperature and the pH or mV reading. These values may fluctuate until the system is stable.
2. When the reading is stable,
Stabilizing... will disappear. If the
Display Lock is enabled, the display will “lock in” on the pH or mV and sample temperature. If the Display Lock is off,
Stabilizing... will still disappear, but the display will show the
current reading and temperature and the values may fluctuate.
3. Record or store the pH or mV value. See SECTION 4 on
page 41 to store or recall data.
4. Remove the electrode from the sample, rinse with deionized
water and place the electrode in the next sample. Repeat steps 1–3 for each sample.
5. When measurements are complete, press the
I/O/EXIT key to
turn the meter off. Rinse the electrode with deionized water and blot dry. Replace the protective cap on the electrode. For proper electrode storage, see the electrode manual for specific instructions.
3.6 Measuring Samples Using ISEs
This is a general guide for ISE measurements. Most measurements require reagent addition. See instructions in the electrode manual for more information and specific steps.
1. After calibration, rinse the electrode and blot dry. If
2. When the reading is stable
necessary, add ISA to 25 mL of sample. Place the electrode( s) into the sam ple.
Stabilizing... will disappear. If the
Display Lock is enabled, the display will show the concentration or mV and sample temperature when a stable reading is reached. If Display Lock is off,
Stabilizing... will
disappear, but the current readings may fluctuate.
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SECTION 3, continued
3. Record or store the concentration or mV value. See
SECTION 4 on page 41 to store o r recall data.
4. Remove the electrode from the sample, rinse with deionized
water, and blot dry. Place the electrode in the next prepared sample. Repeat steps 1–3 for each sample.
5. When measurements are complete, press the
turn the meter off. Rinse the electrode with deionized water and blot dry. Replace the protective cap on the electrode. For proper electrode storage, see the electrode manual for specific inst ructions.
3.7 Measuring Samples Using Standard Additions
This method should only be used within the linear range of the sensing electrode (see the electrode manual). In this mode, the user may also set the stabilization criteria for the channel used. The slope of the electrode being used must be known.
1. If necessary, add ISA to the sample. Rinse the electrode and
blot dry. Place the electrode in the sample.
2. Select the desired channel. From the Reading mode, press
STD ADDN.
3. The display will show
units will be flashing. Use the arrow keys to scroll to the desired units, then press
STANDARD ADDITIONS, and the
ENTER.
I/O/EXIT key to
4. The display will show the slope that was used for the last
standard addition measurement. If desired, enter another value using the numerical keypad. To enter a negative slope, enter the number first, then press the – sign should appear in front of the slope. Press
5. The display will show
Sample, mL, a flashin g ?, and a value
REVIEW/. ± key. The
ENTER.
for the sample v olu me .
6. To change the sample volume, use the numerical keypad.
When entry is comple te or no change is needed, pr ess
ENTER.
7. The meter will measure the sample for a b aseline voltage.
Stabilizing... will appear until the mV read ing is stable.
39
Page 40
SECTION 3, continued
8. After stabilizing, the display will show Standard, a flashing ?,
mL, and a value for the standard volume.
9. To change the standard volume, use the numerical keypad.
When entry is c ompl ete or no change is needed, pre ss ENTER.
10. The display will show
Standard, a flashing ?, units, and a
value for the standard concentration.
11. To change the standard concentration, use the numerical
keypad. Immediately add the selected volume of the selected standard to the sample. Press
ENTER. Do not press ENTER
until the standard has been added to the sample.
12. The meter will return to Reading mode. The + icon in front of
Standard indicates that standard has been added to
the sample.
13. During measurement t he meter wi ll display a mV value.
After stabilization, the meter will calculate and display the value of the original sample.
14. If desired, press
recalled
STANDARD ADDTIONS will appear in the display.
STORE to store this data . When this data is
40
Page 41
SECTION 4 STORING AND RECALLING DATA
4.1 Storing pH/ISE Measurements
The sension™4 meter can store up t o 99 mea sur ement readings.
Data must be stored to recall it later for review, downloading, or printing. Although the meter display will only show the temperature, data location, and pH/IS E value, the following information is stored (and can be downloaded or printed) for each sample:
• storage location • mV reading
• software ver sion • sample tempera tur e
• date • pH or ISE value
• time
• channel
The new data is saved in the next available memory l ocation, numbered from 1 to 99. If no memory locations higher than the current one are available, the meter will “wrap around” and choose the next av aila ble locati on. The user also has the option of choosing the storage location.
To store data:
1. Press
the next av ailable location).
2. Press
location number. To sto re the data i n another lo cation, use the arrow keys to scrol l to anot her locati on or enter a locatio n using the number keys. Press
Note: If al l memory loca tions are fu ll, th e mete r will prompt to o v erw rite a
data point by displaying the data in that location with the current data. Press EXIT to retur n to the previous screen without replacing the data.
STORE. The display will prompt Store Sample #? (# is
ENTER to store the measurement reading in that
• instrument model and serial
number
The question mark will be f lashi ng.
ENTER.
Erase Sampl e ##? Press ENTER to replace
3. The meter will store the reading and ret urn to Read ing mode.
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SECTION 4, continued
4.2 Recalling Stored Data
1. To recall stored d ata, press the RECALL key while in the
Reading mode. The screen will display the most recently saved or recalled measurement data.
2. Use the arrow keys to scroll to the desired storage location.
Press location. The question mark will flash. Enter the number of the desired storage location. Press storage location or
RECALL again to allow number entry of a storage
ENTER to accept the
EXIT to escape.
3. To display the mV value of the reading, press the
ISE/mV key.
4. To review the time of the calibration, press
review the date of the calibration, press
EXIT to return the reading value.
5. When recalling is complete, press EXIT to return to the
Reading mode.
4.3 Erasing Data
4.3.1 Erasing Single Data Points
1. To erase data, it must be recalled first. Press the RECALL key
while in the Reading mode. See Section 4.2 for more information.
2. When the desired data point is displayed, press
pH/mV or
TIME once. To
TIME twice. Press
ERASE.
3. The meter will displ ay
4. The meter will recall the most recently stored or recalled.
5. Repeat steps 2-3 for each data point that needs to be deleted.
Erase Sample # and a flashing ?. Press
ENTER to erase the data. T he data will disappear.
There are three options at this point:
• Press ERASE, then ENTER, to erase the displayed data.
• Press EXIT to exit Recall mode.
• Press an arrow key to scroll to other data points.
42
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SECTION 4, continued
4.3.2 Erasing All Data Points
1. To erase data, it must be recalled first. Press the RECALL key
while in the Reading mode. See Section 4.2 for more information.
2. When the data point is displayed, press
3. Press the up arrow. Th e instrument will show
with the ? (flashing). At this point the options are:
ERASE.
Erase and All
• Press EXIT to return to Recall mode without erasing.
• Press the down arrow to return to the single point
erase prompt.
• Press ENTER to erase all da ta and return to Reading
mode.
4. After all t he data is erased, the meter will return to the
Reading mode.
43
Page 44
44
Page 45
SECTION 5 PRINTING/TRANSFER RING DATA
5.1 Connecting to Printers/Computers
5.1.1 Connecting with the RS232 Cable
The standard 9-p in RS232 connect or on the meter connects with a 9-pin D-sub connector. A suitable cable is listed under Optional Apparatus page 57.
The RS232 interfac e output is an 8-bit d ata w ord plus one stop bit and no parity with a baud rate of 1200 . It can commu nicate wit h a serial printer or a serial port on a computer.
5.1.2 Connecting to a Printer
Connecting a ser ial pr inter to the meter requir es a 9-pin to 25-pin RS232 cable. See Figure 5. The cable provides a direct link between the instrument and the 25-pin connector used for the serial port on most serial printers. Table 4 shows the proper pin connections for 25-pin printer cables. Using cables that do not match the pin information in the table may cause undesirable operation.
Parallel printers require a serial-to-parallel adapter. This allows use of printers that are normally used for IBM-compatible applications.
The Citizen PN60 pr inter requires a sp ecial cabl e to fit into the printer. This cable is shipped with the printer when ordered from Hach Company.
Table 4 Standard 9-pin to 25-pin Printer Cable
9-pin D Connector
Socket
Pin Signal Name Pin Signal Name
2 RXD no connection 3TXD 3 RXD 4 DTR no connection 5 GND 7 GND 6DSR 20 DTR
Serial Printer 25-pin D Connector, plug
7 RTS no connection 8CTS 20 DTR
45
Page 46
SECTION 5, continued
Connect the RS232 cable to the meter by lining up the holes in the cable connector with the pins of the meter serial port. Gently and firmly push the cable into the meter. Then secure the connection by screwing in the screws on either side of the cable port. Connect the cable to the printer in the same manner. Once the communication link is esta blished, pres s the computer.
Note: For optimum performance and ESD protection, use a five-
conductor shielded cable. Use a metal shell for the printer or computer terminal connector, and connect the shield of the cable to the metal shell and the sleeve (signal ground) of the RS232 plug.
Follow the printer manufacturer’s instructions to configure the printer for compat ibility with the meter.
Figure 5 RS232 Cable Connector
PRINT to send data to
5.1.3 Connecting to a Personal Computer
Connect the meter to a personal computer (PC) with the computer interface cable (Cat. No. 48129-00) listed under Optional Accessories page 57. The cable pro vides a direct l ink betwee n the meter and the 9-pin D connector used for the serial port on most personal computers. If your computer has a 25-pin D connector, use a 9-pin to 25-pin adapter (available at most computer supply stores).
46
Page 47
SECTION 5, continued
Table 5 shows the proper pin connections for 9-pin computer cables. Using cables that do not match the pin information in the table may cause undesirable operation.
Table 5 Standard 9-pin to 9-pin Computer Cable
9-pin D Connector Socket Computer 9-pin D Connector, plug
Pin Signal Name Pin Signal Name
2 RXD 3 TXD 3 TXD 2 RXD 4 DTR no connection --­5 GND 5 GND 6 DSR no connection --­7 RTS 8 CTS 8 CTS 7 RTS
Connect the RS232 cable to the meter by lining up the holes in the cable connector with the pins of the meter serial port. Gently and firmly pus h the cable into the meter. Then secure the connection by screwing in the screws on either side of the cable port (see Figure 5). Connect the cable to the computer in the same manner.
To transfer data, th e commun ication p arameters (baud rate, data bits and parity) of the meter and the computer must match. Once the communication link is esta blished, pres s
PRINT to send data to
the computer. Use a communicat ions software, such as HachLink™
(Cat. No. 49665-00) to collect data from the instrument. HachLink is a Windows-based application that allows a personal computer to capture data from several Hach instruments, including the sens
ion electrochemi cal meter s. The captu red data
can be stored in a text file as a spread-sheet compatible format or a free-format text. Data captured in the sp readsheet format is easily transferred into most spreadsheet programs (i.e., MS
®
Excel, Microsoft® Works, Lotus 1 23) f or graphi ng and
reporting.
To install and run HachLink™ Data Capture, the computer and software must meet the following minimum requirements:
47
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SECTION 5, continued
• IBM PC/AT or compatible with a 386SX processor (16 MHz
or better)
• 4 megabytes of RAM
• Hard disk drive with 2 megabytes or more of free space
• 3-1/2 inch, 1.44 megabyte floppy disk drive
• VGA graphics with 640 x 480 or higher resolution, 16 or
more colors
• Mouse or other pointing device
• A 9-pin serial port (or 25-pin serial port with 9-pin adapter)
• Windows 3.1 or later
• DOS 3.3 or later
5.2 Sending Data to Printers/Computers
5.2.1 Printing Data at Intervals
The last option in the Setup menu lets the user choose a print interval. When this option is enabled, the mete r will automatically send data to a printer or computer at the selected time interval. See Section 3.1.10 on page 30 for more information on enabling this option
5.2.2 Sending Currently Displayed Data
To print or transfer a current reading:
1. Wait until the display is stable. Press
Note: Data can be printed before the reading is stable. An asterisk will
be printed with the measurem ent data to indicate the stab ility crit eria were not met.
PRINT.
2. The word PRINT will be briefly displayed, then the meter
3. The printout for data that is printed without being stored will
will return to Reading mode.
not have a storage location number.
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SECTION 5, continued
5.2.3 Sending Recalled Data Points
1. To transfer data, it must be recalled first. Press the RECALL
key while in the Reading mode. See Section 4.2 on page 42 for more information.
2. When the desired sample data is displayed, press
3. The word
PRINT will be briefly displayed, then the meter
will return to Reading mode.
5.2.4 Sending All Stored Data and the Average pH Value
1. To transfer all data, it must be recalled first. Press the
RECALL key while in the Reading mode. See Section 4.2 on
page 42 for mo re informa tion.
2. When a data poi nt i s d is played, press PRINT. The display will
show
Print Sample # ?.
3. Press the up arrow. Th e instrument will show
and All with the flashing ?. At this point the options are:
• Press EXIT to return to Reading mode without printing.
• Press the down arrow to return to the prompt for pr inting
single data points.
PRINT.
Print, Sample
• Press ENTER to pr int all d ata a nd the a v er age pH of the s tored
data (data that is printed but not stored will not be included). The word printed. Then the meter will return to the most recently stored sample data. Press arrow key to scroll to another data point.
PRINT will be displayed until all the data has been
EXIT to return to Reading mode or an
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SECTION 5, continued
5.2.4.1 Printed Data Format
Printed data will have the following format:
Storage
Location
# 1 <1> 7.53 pH 22.7 C -30.0 mV 10/03/99 08:30 sensIon4 12344577 PX.X # 2 <1> 6.13 pH 13.6 C 50.0 mV 10/04/99 09:11 sensIon4 12344577 PX.X. # 3 <2> 7.01 pH 20.1 C -0.0 mV 10/10/99 12:44 sensIon4 12344577 PX.X
Channel
Number
Reading Temperature
mV
Reading
Date Time
Meter
Model
Serial
Number
Software
Version
*Average: 6.54 pH
* This line will not be included unless Print All is chosen. This calculation is included for some reporting regulations, but is not just an average of the pH readings. The calculation for the pH average is:
n
pH
AVG
 
∑

i=1

-log
=
------------------------------- -
10
 
pH–i()
10
()
n
 
5.2.5 PC Control of the Meter through the RS232 Interface
The meter can be controlled remotely using a PC. The communication protocols are 1200 baud rate, 8-bit word, 1-stop bit, no parity. A summary of the commands is shown in Table 6.
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SECTION 5, continued
Table 6 sension4 RS232 Commands
Key
Instrument ID IID Exit Key EXT OK
Up Arrow UPA OK Down Arrow DOW OK Enter ENT OK Recall REC OK Store STO OK Erase ERA OK ISE/mV ISE OK pH/mV PHM OK Std Addn STD OK Print PRI OK Channel CHA OK Time/Date TIM OK Cal CAL OK
Command (upper or
lower case)
Returns
ion4 xxxx
sens (serialized part of serial number)
Review REV OK Setup SET OK Calibrate Offset (cur rent channel
and connector)
CRD OK
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SECTION 6 TROUBLESHOOTING
6.1 Introduction
Correcting problem conditions with the sension electrochemical
meters is limited to responding to the error message displayed. Other problems must be handled b y a Hach technic ian at a service center. Refer to Repair Service. Do not attempt to service the meter as there are no field-serviceable parts. Opening the meter case will void the warranty.
6.2 Shorting Test
This test detects the mete r offset
1. Turn the meter on. Connect the shorting cap to the BNC
connector (see Figure 6). Make sure the channel with the shorting cap is selected. Select BNC from Setup 1 choices.
2. Change the output to display in mV (press the ISE/mV or
pH/mV key to toggle between mV and concentration). After
the meter has stabilized, simultaneously press
ENTER. The display should show 0.0 mV. If it does not,
contact Hach Service. Repeat for the other channel.
CAL and
Figure 6 Attaching Shorting Caps to the BNC Connector
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SECTION 6, continued
6.3 Error Codes And Errors
Errors and error codes indicate a functional problem with the meter and/or the electrode. Error codes numbers will appear in the temperature field along with other icons. Table 7 describes the possible error codes, errors, and some possible solutions to eliminate the cause.
Table 7 Error Codes
Error Code Error Name & Display Icons Description
Calibration slope is too high or low. Ensure correct pH buffers are used. Be sure a pH probe is connected to the meter. Disconnect any probe connected to the BNC connector.
The value read will not work in the calibration algorithm. Repeat calibration with new buffers or standards.
Service.
E2
E3
E9
Cal slope error.
SLOPE will be displayed.
Cal Std Error.
ERROR, CAL and Standard
will be displayed. Corrupt data Recalled data had a bad checksum. Call Hach
ERROR and
6.4 Meter Service Request Questionnaire
1. What is the complete l ot code of the meter and electrode?
2. On what date was the meter purchased?
3. How long has th e meter been in use?
4. What types of samples are being tested?
5. What is the temperature of the samples being tested?
6. How often is the meter being used?
7. How is the meter being stored bet w een use s?
8. If the meter has been in use for a while, what maintenance
9. Describe the suspected problem or failure of the meter.
10. Please have your meter, electrode, buffers/standards , and this
has been performed?
completed questionnaire near the phone before calling technical support.
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GENERAL INFORMATION
At Hach Company, customer service is an important part of ev e ry product we make.
With that in mind, we have compiled the following informa t ion for your convenience.
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REPLACEMENT PARTS
REPLACEMENT REAGENTS
Quantity Required
Description Per Test Unit Cat. No.
Buffer Powder Pillows:
pH 4.01, color-coded red................................................... 1..........50/pkg..............22269-66
pH 7.00, color-coded yellow............................................. 1..........50/pkg..............22270-66
pH 6.86 (NIST)................................................................. 1.......... 15/pkg..............14098-95
pH 10.00, color-coded blue............................................... 1..........50/pkg ..............22271-66
Buffer Solutions:
pH 4.00, color-coded red, NIST.................................... 25 mL....500 mL..............22834-49
pH 7.00, color-coded yellow, NIST ..............................25 mL ....500 mL..............22835-49
pH 10.00, color-coded blue, NIST................................25 mL ....500 mL..............22836-49
pH Electrode Storage Powder Pillows ................................... 1..........20/pkg..............26573-64
pH Electrode Storage Solution........................................... 50 mL ....475 mL..............50301-49
Standards and reagents for ISE testing are listed in the specific electrode manuals
REPLACEMENT APPARATUS
Beaker, poly, 50 mL ............................................................... 1..............each................1080-41
ion ion
™
4 Benchtop pH/ISE Meter, 115 V .......................... 1..............each..............51775-10
™
4 Benchtop pH/ISE Meter, 230 V .......................... 1..............each..............51775-11
sens sens
Shorting Cap, BNC ................................................................ 1..............each..............51895-00
Temperature Probe, 5-pin....................................................... 1..............each..............51980-00
OPTIONAL APPARATUS
Ammonia Combination Electrode, BNC ................................................each..............50250-00
Calcium Half-cell....................................................................................each..............50240-00
Chloride Combination Electrode, BNC ..................................................each..............50225-00
Computer Interface Cable, 9-pin to 9-pin D-sub.....................................each..............48129-00
Cyanide/Iodide Electrode........................................................................each..............50260-00
Demineralizer Bottle, 177 mL................................................................ each..............14299-00
Electrode Stand .......................................................................................each..............45300-00
Electrode Stand with Electromagnetic Stirrer, 115 Vac..........................each..............45300-01
Electrode Stand with Electromagnetic Stirrer, 230 Vac..........................each..............45300-02
Fluoride Combination Electrode.............................................................each..............50265-00
Fluoride Half-cell....................................................................................each..............44500-71
HachLink™ Data Capture software........................................................each..............49665-00
Low Ionic strength Chamber...................................................................each..............51899-00
Nitrate Combination Electrode, Platinum Series, BNC..........................each..............51920-00
ORP Combination Electrode, BNC.........................................................each..............50230-00
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REPLACEMENT PARTS, continued
OPTIONAL APPARATUS (continued)
Description Unit Cat. No.
Platinum Series pH Flat Combination Electrode, 5-pin connector..........each .............51915-00
Platinum Series pH Combination Electrode, w/temp., 5-pin connector..each .............51910-00
pH Gel-filled Electrode, w/temp., 5-pin connector .................................each.............51935-00
Potassium Half-cell..................................................................................each.............50245-00
Printer Interface Cable, 9-pin to 25-pin...................................................each.............49503-00
Printer, Citizen PN60I, 115 V, North American Style Plug.................... each.............26687-00
Power Cord, for Citizen PN60I, Continental European Style Plug.........each.............46836-00
Reference Electrode, double junction......................................................each .............50225-00
Reference Electrode, single junction.......................................................each.............50220-00
ion ion
ion
™
1 Portable pH Meter................................................................ each.............51700-00
™
2 Portable pH/ISE Meter......................................................... each.............51725-00
™
3 Benchtop pH Meter, 115 V, No. American style plug..........each.............51750-00
™
3 Benchtop pH Meter, 230 V, European style plug .................each.............51750-01
7
/16 x 3/16....................................................................................each.............45315-00
sens sens
sension
sens
Sodium Combination Electrode, Platinum Series, BNC.........................each.............51925-00
Stir Bar,
Temperature Probe, 5-pin ........................................................................each .............51980-00
Thermometer, mercury, -20 to 110 °C.....................................................each .............20959-11
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HOW TO ORDER
Information Required
By Telephone: By Mail:
6:30 a.m. to 5:00 p.m. MST Hach Company Monday through Friday P.O. Box 389 (800) 227-HACH Loveland, Colorado 80539-0389 (800-227-4224) U.S.A.
By FAX: Ordering informationby E-mail:
(970) 669-2932 orders@hach.com
• Hach account number (if available) • Billing address
• Your name and phone number • Shipping address
• Purchase order number • Catalog number
• Brief description or model number • Quantity
Technical and Customer Service (U.S.A. only)
Hach Technical and Customer Service Department personnel are eager to answer questions about our products and their use. Specialists in analytical methods, they are happy to put their talents to work for you. Call 1-800-227-4224 or E-mail
techhelp@hach.com.
International Customers
Hach maintains a worldwide network of dealers and distributors. To locate the representative nearest you, send E-mail to
intl@hach. com or
In Canada:
Hach Sales & Service Canada Ltd.; Manitoba, Canada Telephone: (204) 632-5598; FAX: (204) 694-5134
call (970) 669-3050.
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REPAIR SERVICE
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WARRANTY
Hach warrants most products against defective materials or workmanship for at least one year from the date of shipment; longer warranties may apply to some items.
HACHWARRANTSTOTHE ORIGINAL BUYERTHAT HACH PRODUCTSWILL CONFORMTO ANY EXPRESSWRITTEN WARRANTY GIVEN BY HACHTOTHE BUYER. EXCEPT AS EXPRESSLY SET FORTH INTHE PRECEDING SENTENCE, HACH MAKES NOWARRANTY OF ANY KINDWHATSOEVER WITH RESPECTTO ANY PRODUCTS.HACH EXPRESSLY DISCLAIMS ANYWARRANTIES IMPLIED BY LAW, INCLUDING BUT NOT BINDINGTO ANYWARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
LIMITATION OF REMEDIES:
Hach shall, at its option, replace or repair nonconforming products or refund all amounts paid by the buyer.
BREACH OFWARRANTY.
LIMITATION OF DAMAGES: IN NO EVENT SHALL HACH BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND FOR BREACH OF ANYWARRANTY, NEGLIGENCE, ONTHE BASIS OF STRICT LIABILITY, OR OTHERWISE.
THIS ISTHE EXCLUSIVE REMEDY FOR ANY
This warranty applies only to Hach products purchased and delivered in the United States.
Catalog descriptions, pictures and specifications, although accurate to the best of our knowledge, are not a guarantee or warranty.
For a complete description of Hach Company’s warranty policy, request a copy of our Terms and Conditions of Sale for U.S. Sales from our Customer Service Department.
Hach warr ants the meter against defective materials or workmanship thr ee years from the dat e of shipment. The Docking Station is warranted for one year after the date of shipment.
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HACH COMPANY WORLD HEADQUARTERS
P.O. Box 389 Loveland, Colorado 80539-0389 Telephone: (970) 669-3050 FAX: (970) 669-2932
FORTECHNICAL ASSISTANCE, PRICE INFORMATION AND ORDERING:
In the U.S.A. ­Outside the U.S.A. ­On the Worldwide Web - ; E-mail -
Call 800-227-4224
toll-free
Contact the HACH office or distributor serving you.
www.hach.com techhelp@hach.com
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