YSI 3200 User Manual

YSI Model 3200

Conductance, Resistance, Salinity, Total Dissolved Solids and Temperature Instrument

Operations Manual

CONTENTS

1. Introduction.............................................................................................................................................1

1.1 Capabilities .......................................................................................................................................1

1.2 User Features ....................................................................................................................................2

1.3 Controls.............................................................................................................................................3

Front Panel .......................................................................................................................................3

Rear Panel.........................................................................................................................................5

2. Getting Started ........................................................................................................................................7

2.1 Unpacking.........................................................................................................................................7

2.2 Warranty Card...................................................................................................................................7

2.3 What You Need ................................................................................................................................7

2.4 Setting Up.........................................................................................................................................7

3. System Configuration and Operation..................................................................................................11

3.1 Menu...............................................................................................................................................11

3.2 Cell Calibration...............................................................................................................................12

Configure........................................................................................................................................12

Cal K ..............................................................................................................................................14

3.3 Temperature Compensation............................................................................................................16

Temp...............................................................................................................................................17

3.4 Platinization....................................................................................................................................19

3.5 Display Configuration.....................................................................................................................19

Measurement Units.........................................................................................................................20

Contrast ..........................................................................................................................................21

Time/Date.......................................................................................................................................21

Alarms............................................................................................................................................21

Beeper.............................................................................................................................................22

Ranging ..........................................................................................................................................23

3.6 Making Measurements....................................................................................................................25

4. Data Storage and Retrieval...................................................................................................................27

4.1 Store................................................................................................................................................27

4.2 Review............................................................................................................................................28

Recall..............................................................................................................................................29

Send All..........................................................................................................................................29

Clear ...............................................................................................................................................29

Clear All.........................................................................................................................................30

4.3 Send ................................................................................................................................................31

Send Setup......................................................................................................................................31

Data Logging..................................................................................................................................33

5. Diagnostics .............................................................................................................................................35

5.1 Send ................................................................................................................................................35

5.2 Beep................................................................................................................................................35

6. Maintenance...........................................................................................................................................37

6.1 Cell Cleaning and Storage ..............................................................................................................37

6.2 Platinization....................................................................................................................................37

7. Troubleshooting.....................................................................................................................................39

Error Messages...............................................................................................................................39

8. Principles of Operation.........................................................................................................................41

8.1 Ratiometric Conductivity................................................................................................................41

8.2 Conductivity Principles...................................................................................................................41

Introduction....................................................................................................................................41

Conductivity Fundamentals............................................................................................................41

Cell Constant..................................................................................................................................42

Choosing a Conductivity Cell ........................................................................................................43

Cell Constant Calculation...............................................................................................................45

Conductivity Cell Calibration - Some Things To Remember......................................................45

Conductivity Law...........................................................................................................................46

Low Conductivity Measurements...................................................................................................46

General Conductivity Measurement Precautions...........................................................................47

Platinization.................................................................................................................. ..................47

Temperature Correction..................................................................................................................47

Small Sample Measurements..........................................................................................................49

Conductivity System Accuracy Considerations.............................................................................49

8.3 Salinity............................................................................................................................................50

8.4 Total Dissolved Solids....................................................................................................................50

8.5 Temperature....................................................................................................................................50

8.6 Sources of Errors ............................................................................................................................50

Cell Contamination.........................................................................................................................50

Cell Platinizing...............................................................................................................................50

Electrical-Noise Errors...................................................................................................................51

Contact Resistance .........................................................................................................................51

Cable Series Resistance and Shunt Capacitance ............................................................................51

Galvanic and Miscellaneous Effects ..............................................................................................51

9. Warranty & Repair...............................................................................................................................53

Cleaning Instructions.....................................................................................................................56

Packing Instructions.......................................................................................................................57

9.1 Software Upgrade Procedure..........................................................................................................58

9.2 Disassembly/Assembly Procedures ................................................................................................59

9.3 Test and Verification Procedure .....................................................................................................60

10. Accessories and Replacement Parts...................................................................................................63

10.1 YSI Conductivity Cells.................................................................................................................64

10.2 Standard Calibrator Solutions.......................................................................................................65

Appendix A - Specifications .....................................................................................................................67

Appendix B - Required Notice..................................................................................................................69

Appendix C - RS232 Connections............................................................................................................71

Appendix D - Temperature Correction Data for Typical Solutions.....................................................73

Appendix E - Conversion Factors............................................................................................................77

Appendix F - Glossary of Terms..............................................................................................................79

SECTION 1 INTRODUCTION

The Model 3200 is a microprocessor based; menu-driven instrument designed to perform laboratory measurement of conductivity, resistivity, salinity, total dissolved solids and temperature. The instrument’s menu system makes it simple to use.

The new YSI 3200 series conductivity cells contain internal temperature sensors for temperature measurement and automatic temperature compensation. The Model 3200 is compatible with YSI 3400 series conductivity cells when used with the YSI Model 3232 cell adapter.

Internal memory for storing up to 100 sets of data and an RS232 port allow you to upload data from the Model 3200 directly to your computer or serial printer.

1.1 CAPABILITIES

• Adjustable cell constant

0.005 to 100

• Readout units selectable

uS/cm, uS, ppt, ohm-cm, ohm, TDS

• Auto or manual ranges

• Adjustable reference temperature

0 to 100°C

• Adjustable automatic temperature compensation factor

0-10%/°C linear, prestored non-linear curves

• Six cell setup memory, with solution memories

Remembers cell constant, compensation method, multi-point cals and linear or non-linear solution curves

• 100 data point memory

Stores date, time, temperature and conductivity

• Field software updates

Via RS232 port

• RS232 serial port

Output suitable for import to any spreadsheet

• Serial printer output

• AC line power

• 7-pin mini-DIN probe connector

• Separate connection for standard YSI temperature probes

YSI Incorporated Model 3200 1

Introduction Section 1

1.2 USER FEATURES

• Audio feedback

• Soft key/menu system

• Real time clock

• Auto linear temperature compensation calibration

Two temperature points are tested in a known solution to automatically determine the solution’s compensation slope. Alternatively, the user may input a temperature compensation factor directly (0 - 10%/°C).

• Auto non-linear temperature compensation calibration

This is a technique where a known solution is used to calibrate over a wide range of temperature. The solution is ramped though a temperature range while the instrument automatically and continuously generates calibration data. The calibration would be done once and the results stored in non-volatile memory for recall any time that solution is tested. Data for six solutions can be stored at any one time.

The user may also select from 2 pre-programmed non-linear temperature compensation curves.

• Single or multi-point cell calibration

The cell constant can be calibrated at several points and stored in permanent memory. During a reading, the closest calibration point is used as the cell constant.

• High/low alarm

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Introduction Section 1

1.3 CONTROLS

FRONT PANEL

The front panel of the instrument contains the display and keypad as shown below.

CONDUCTIVITY INSTRUMENT

3200

OPERATION

1.372

12:40

CELL SETUP DIAG RANGE

24.99°c

Display

Power

ON/OFF

MODE Key

ENTER Key

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Introduction Section 1

Soft k

The 3200 has two main operating modes, Data and Operation. The current mode is displayed in the dark bar at the top right corner of the display. The following diagram shows the typical display while the instrument is in the Operation mode.

Conductance: S

Conductivity: S/cm

Resistance: Ω

Resistivity: Ωcm

Tem

The bottom row of the display identifies the function of the four soft keys, which are located on the keypad below the display. The function of each of these keys changes with each mode.

The [Mode] key and soft keys are used to navigate through the menus. The [Mode] key is used to cycle between the two main operating modes. Pressing a soft key will bring up a new set of soft key functions (menu). The [Mode] key is also used to backup through the menus to the top level.

mS/cm

MΩcm

Salinity: ppt

TDS: mg/L

erature: °C

uS/cm

KΩ

MΩ

KΩcm

1.953uS/cm

11:33AM 24.38°C

MESSAGES DISPLAYED HERE CELL SETUP DIAGNOSTICS RANGE

Operation

K=10.100

25.0°C

1.91%/°C T CELL

Message line

Mode

Cell constant

emperature compensation data

emperature

source

functions

The right side of the display shows the cell constant, temperature compensation data and current temperature source.

K= 10.100 indicates that a single fixed cell constant of 10.100 is being used. K= would change to Km= when using multipoint calibration.

25.0°C indicates that readings are temperature corrected to 25°C using a coefficient of 1.91%/°C, as indicated just below on the screen. When non-linear temperature compensation is used, N.L. is displayed here. When a standard non-linear curve is selected, the name of the curve (Pure, Natural) is displayed here. When no temperature compensation is being used, these two lines of the 3200 display are blank.

T CELL indicates that the temperature source is a conductivity cell with an internal temperature sensor (YSI 3200 series). T PROBE is displayed when the temperature source is an external temperature probe.

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Introduction Section 1

REAR PANEL

The rear panel contains the connections for the power supply, cell, external temperature probe and RS232 serial port. It also has a mounting post for the 3232 adapter as shown below.

Adapter mounting post

POWER SUPPLY CONNECTION

The power supply connection requires a 12 VDC power supply (included) with at least 300 ma current. The polarity is marked on the instrument.

CELL CONNECTION

The connector for the cell is a 7-pin mini DIN connector and is marked with an arrow to show proper alignment. Be sure to align the arrows when plugging in the cell.

YSI 3200 series cells utilize a mini DIN connector that plugs directly into the 3200. If, however, you have a YSI 3400 series cell, the YSI 3232 cell adapter and a YSI 3220 or YSI 700 series temperature probe will be required. The YSI 3232 cell adapter mounts on the post on the rear of the 3200. It has a 7-pin mini-DIN connector and two binding posts. The mini-DIN connector plugs into the 3200 cell socket and a YSI 3400 series cell (or equivalent) connects to the binding posts.

RS232 CONNECTION

The RS232 connection is a standard DB9 connector. This connector allows the 3200 to be connected to the serial port of a computer or serial printer. A standard straight (NOT a null modem) cable is required for connecting to a computer. To connect to a serial printer, use a straight 9-pin male to 25 pin female cable (see Appendix - B).

EXTERNAL TEMPERATURE CONNECTION

The external temperature probe connection is used for temperature measurement and compensation whenever the conductivity cell currently connected does NOT contain an internal

YSI Incorporated Model 3200 5

Introduction Section 1

temperature sensor. All YSI 3200 series cells contain an internal temperature sensor; therefore, an external temperature probe is NOT necessary when using a 3200 series cell. However, if an external temperature probe is used with a YSI 3200 series cell, the external temperature probe will override the temperature sensor in the cell.

YSI 3400 series cells do not contain an internal temperature sensor; therefore, an external temperature probe (YSI 3220 or YSI 700 series) is needed for temperature measurement or compensation.

CE COMPLIANCE

Use of an external temperature probe or the YSI Model 3232 cell adapter with this instrument may cause non-compliance with CE standards. See the Declaration of Conformity.

YSI Incorporated Model 3200 6

SECTION 2 GETTING STARTED

2.1 UNPACKING

When you unpack your new YSI Model 3200 for the first time, check the packing list to make sure you have received everything you should have. If there is anything missing or damaged, call the dealer from whom you purchased the Model 3200. If you do not know which of our authorized dealers sold the system to you, call YSI Customer Service at 800-765-4974 or 937767-7241, and we'll be happy to help you.

2.2 WARRANTY CARD

Please complete the Warranty Card and return it to YSI. This will record your purchase of this instrument in our computer system. Once your purchase is recorded, you will receive prompt, efficient service in the event any part of your YSI Model 3200 should ever need repair.

2.3 WHAT YOU NEED

Several things are needed in order to make accurate conductivity measurements using the YSI

3200. The following list shows the basic items required.

• Instrument

• Power Supply

• Conductivity Cell

• Standard Solution(s)

• Beakers

• Rinsing Solution

2.4 SETTING UP

1. Power

Plug the power supply into its mating connector on the back of the instrument. Depress the (on/off) key to turn the instrument on. The following screen should be displayed.

OPERATION

0.0000 uS/cm

11:33AM -10.00°C

CELL SETUP DIAG RANGE

Notice that the units displayed are “uS/cm” indicating that the 3200 is in conductivity mode (conductivity = conductance x cell constant). If the units are displayed as “uS” (no “/cm”), the 3200 is reading only conductance (as shown on the following page).

YSI Incorporated Model 3200 7

K=1.000

25.0°C

1.91%/°C T CELL

Getting Started Section 2

OPERATION

0.0000 uS

11:33AM -10.00°C

CELL SETUP DIAG RANGE

It is important to remember that the cell constant is NOT used when displaying conductance. To change the measurement units, see 3.5 Display Configuration, Measurement Units.

The bottom row of the display shows the soft key menu.

K=1.000

25.0°C

1.91%/°C T CELL

Soft key

2. Set the Date and Time

Press the [SETUP] soft key to enter the Setup menu.

SETUP

0.0000 uS/cm

11:33AM -10.00°C

K=1.000

25.0°C

1.91%/°C T CELL

DISPLAY TIME/DATE SYSTEM RANGE

Then, press the [TIME/DATE] soft key to enter the Time/Date menu. The following screen will be displayed.

TIME/DATE [ 8:34:04] AM [ 2/15/1997]

[AM/PM] time format [MM/DD/YY] date format

UP DOWN DIGIT NEXT

The cursor (underline) starts at the first digit of the time field. Use the [UP] or [DOWN] soft key to change the underlined digit. When you have the correct digit displayed, press the [DIGIT] soft key to move the cursor to the next digit, then use the [UP] or [DOWN] soft key to change that digit. After you have entered the correct time, press the [NEXT] soft key to move the cursor to the date field, then enter the correct date using the [UP], [DOWN] and [DIGIT] soft keys.

After you have entered the correct date and time, press the [MODE] key two times to save and exit to the Setup menu.

YSI Incorporated Model 3200 8

Getting Started Section 2

3. Connect the Cell

Plug the cell (YSI 3200 series) into the connector on the back of the instrument marked cell. NOTE: If you are using a YSI 3400 series cell, you will need the following:

• 3232 adapter

• YSI 3220 or 700 series temperature probe

4. Configure the 3200

Next, you must configure the 3200 with the correct cell constant of the cell you are using. From Operation mode, press the [CELL] soft key to enter the Cell menu.

[0] # Configuration number CELL

[CONFIG 0] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.91] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp ENTER TO SEND CONFIGURATION

CONFIGURE CAL K TEMP PLATIN

Then, press the [CONFIGURE] soft key to enter the Configure menu. Configure is used to select and configure the current cell and temperature compensation. The 3200 stores six configurations numbered 0 to 5.

K field (cell constant)

[0] # Configuration number CONFIG

[CONFIG 0] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.91] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp ENTER TO SEND CONFIGURATION

UP DOWN DIGIT NEXT

Press the [UP] or [DOWN] soft key until you have selected configuration 0. The default configuration is a single fixed cell constant of K = 1, linear temperature compensation corrected to 25°C using a coefficient of 1.91%/°C.

Press the [NEXT] soft key to move the cursor (underline) to the Title field. Using the [UP], [DOWN] and [DIGIT] soft keys, you may enter a name for this configuration.

Press the [NEXT] soft key four times to move the cursor to the K field. Using the [UP], [DOWN] and [DIGIT] soft keys, enter the manufacturer’s stated cell constant for the cell that you are using (K= 0.1, 1.0, 5.0, 10.0 etc.).

Press the [MODE] key two times to return to the Operation menu.

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Getting Started Section 2

5. Measurement

After setting up the 3200 instrument and cell as described above, the following basic steps should be used to make measurements.

1. Immerse the cell (YSI 3200 series) in the solution to be measured. If using a YSI 3400

series cell, also place the temperature probe in the solution.

2. Gently tap the cell to remove any air bubbles and dip the cell in the solution 2 or 3 times

to ensure proper wetting. The cell electrodes must be submerged and the electrode chamber must not contain any trapped air. If using a flow through or fill cell, be certain it is completely full.

3. Allow time for the temperature to stabilize.

4. Read the display, send the reading to a computer or serial printer (see section 4.3 Send),

or store the reading in memory (see section 4.1 Store).

5. Remove the cell (and temperature probe, if used) from the sample solution and rinse with

distilled or deionized water.

YSI Incorporated Model 3200 10

SECTION 3 SYSTEM CONFIGURATION AND OPERATION

3.1 MENU

The following section shows the software flow chart for the 3200. The two operating modes, Data and Operation, are shown at the top with the soft key functions that are accessed in each mode below them.

Data

Store

Review

Down

Digit

Store

Recall

Send All

Clear

Clear All

Down

Digit

Send

Down

Digit

Delete

Operation

Cell

Configure

Cal K

Offset

Remove

Measure

Single Point

Multi Point

Send

Temp

L. Temp

Point 1

Point 2

N. L. Temp

Start

End

Send

Platin

Send

Send Setup

Set Com

Set Sen

Setup

Display

Size

Light

Dark

Time/Date

System

Range

Diag

Send Beep

Range

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System Configuration and Operation Section 3

3.2 CELL CALIBRATION

Before operating the 3200, or whenever you change cells, you must configure the 3200 to match the cell used. There are two ways to do this. Choose the one that best meets your needs.

1. You may directly enter the manufacturer’s stated (or your manually calculated) cell

constant (K). See 3.2 Cell Calibration, Configure.

2. Allow the 3200 to calculate the cell constant and calibrate the system using standard

conductivity solution(s). See 3.2 Cell Calibration, Cal K.

The cell constant of up to six different cells (# 0 - 5) can be stored in non-volatile memory. The 3200 can determine the cell constant for a cell at a single point or up to five points using different standard solutions.

Remember that Conductance (uS, mS or S) or Resistance (Ω, KΩ or MΩ) readings do NOT use the cell constant. The 3200 must be set up to read Conductivity (uS/cm, mS/cm or S/cm) or

Resistivity (Ω-cm, KΩ-cm or MΩ-cm) for the cell constant to be used. See 8.2 Conductivity Principles, Conductivity Fundamentals.

From the Operation mode, press the [CELL] soft key to enter the Cell menu. The bottom row of the display shows the soft key menu.

[0] # Configuration number CELL

[CONFIG 0] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.91] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp ENTER TO SEND CONFIGURATION

CONFIGURE CAL K TEMP PLATIN

The Cell screen shows the configuration for the currently selected cell. The first two soft keys are used to select the current cell configuration and calculate the cell constant (K). The cell constant can be calculated at a single point with a standard solution or up to five points with different solutions.

The last two soft keys are used to calculate the temperature coefficient of solutions and to replatinize the electrodes of the cell.

CONFIGURE

Configure allows the user to directly input the cell constant (K), temperature compensation mode and factor and total dissolved solids (TDS) multiplier. It also allows you to select a standard nonlinear temperature compensation curve for ultrapure or natural water. Alternatively, you may calibrate the cell constant (K) and measure the temperature compensation factor in menus Cal K and Temp. See 3.2 Cell Calibration, Cal k and 3.3 Temperature Compensation, Temp.

From the Cell menu, press the [CONFIGURE] soft key to enter the Configure menu. The bottom row of the display shows the soft key selections.

YSI Incorporated Model 3200 12

System Configuration and Operation Section 3

[0] # Configuration number CONFIG

[CONFIG 0] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.91] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp ENTER TO SEND CONFIGURATION

UP DOWN DIGIT NEXT

Press the [UP] or [DOWN] soft key to select one of the six (0-5) stored configurations. Each configuration contains the single cell constant, zero offset, multiple cell constants, total dissolved solids (TDS) multiplier, linear temperature compensation coefficient and non-linear temperature compensation data.

To change the currently selected configuration, press [NEXT] to move the cursor to the field you want to change. Then, use the [UP], [DOWN] and [DIGIT] soft keys to change the field, except Offset. The Offset field can only be changed from the Offset menu. The following table shows the choices for each field.

Example: To select the standard non-linear temperature compensation curve for ultrapure water,

press [NEXT] three times, to move the cursor to the Comp field, then, press the [UP] or [DOWN] soft key to cycle through the selections until Pure is displayed. Press [MODE] two times to exit to the Operation menu.

Field Range / options Description

Title A - Z or 0 - 9 User defined name for this configuration. Cell Cal Single or Multi Selects between a single fixed cell constant

and multiple cell constants.

Comp Linear, N. Linear, Pure, Natural

or Off

Selects between a linear temperature compensation coefficient, non-linear temperature compensation curve, standard non-linear temperature compensation curve (pure or natural) or no temperature compensation.

TDS mult 0.55 - 0.90 Factor used to calculate the total dissolved

solids from the conductivity.

uS offset 0.0000 - 0.0150 Zero offset. Used only when measuring

conductance below 10uS to offset cell lead insulation resistance. This value can only be changed from the Offset menu.

K 0.001 - 100.999 Single fixed cell constant value (K). This

value is only used when the Cell Cal field is set to Single.

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System Configuration and Operation Section 3

Field Range / options Description

%/°C comp val 0.0 - 10 Linear temperature compensation value. This

value is only used when the Comp field is set to Linear.

°C comp temp 0.0 - 100 Reference temperature that readings are

compensated to when temperature compensation is used.

After you have finished changing the current configuration, press [MODE] two times to return to Operation mode.

From the Config menu, the [ENTER] key may be used to send the current configuration data to a computer or serial printer via the RS232 port.

CAL K

From the Cell menu, press the [CAL K] soft key to enter the Calibrate K menu. This menu is used to measure the cell constant (K) of the current cell and store it in the currently selected configuration. The cell constant can be measured at a single point using a single standard solution or at multiple points using different value standard solutions. Alternatively, you may directly input the cell constant in Cell Configuration. See 3.2 Cell Calibration, Configure.

[0] # Configuration number CALIBRATE K

[CONFIG 5] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.91] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp

OFFSET SINGLE PT MULTI PT SEND

Single Point

To calculate and store the cell constant (K) at a single point:

1. From the Calibrate K menu, press the [SINGLE PT] soft key.

2. Clean the container and cell (and temperature probe, if used) with deionized water.

3. Rinse the cell (and temperature probe, if used) with some of the standard solution.

4. Place the cell (and temperature probe, if used) in the standard solution and wait for the

temperature reading and measured K value to stabilize.

5. Using the [UP], [DOWN] and [DIGIT] soft keys, enter the value of the standard solution

at the current temperature. Temperature compensation is OFF during cell calibration. Example: YSI 3161 Conductivity Calibrator is 1000uS at 25°C, but at 23°C you would enter 961uS.

6. Press [ENTER] to store the current cell constant (K). Press [MODE] three times to exit.

7. Remove the cell (and temperature probe, if used) from the solution and rinse with

deionized water.

YSI Incorporated Model 3200 14

System Configuration and Operation Section 3

Entered standard solution

Measured K

[961.00] uS/cm Conductivity

1.024 measured K 23.0°C

[1.00] K Cell ENTER TO STORE

UP DOWN DIGIT

CAL CELL K

Current temperature

Multi Point

To calculate and store the cell constant (K) at multiple points using different value standard solutions:

1. From the Calibrate K menu, press the [MULTI PT] soft key.

2. Clean the container and cell (and temperature probe, if used) with deionized water.

3. Rinse the cell (and temperature probe, if used) with some of the standard solution.

4. Place the cell (and temperature probe, if used) in the solution and wait for the temperature

reading and measured K value to stabilize.

5. Using the [UP], [DOWN] and [DIGIT] soft keys, enter the value of the standard solution

at the current temperature. Temperature compensation is OFF during cell calibration. Example: YSI 3161 Conductivity Calibrator is 1000uS at 25°C, but at 23°C you would enter 961uS.

6. Press [ENTER] to store the current cell constant (K). Stored values are displayed at the

bottom of the screen.

7. Repeat steps 3 - 6 for the remaining solutions.

8. If you have entered less than 5 solutions, enter 0.0uS for each remaining (unused) point

and press [ENTER] to store each one.

9. When you have measured all the solutions and stored all 5 points, press [MODE] two

times to exit to the Cell menu.

10. Press the [CONFIGURE] soft key to enter the Configure menu, then press [NEXT] two

times to move the cursor to the Cell Cal field. Press the [UP] or [DOWN] soft key to select Multi cell calibration. Press [MODE] two times to exit to Operation mode.

11. Remove the cell (and temperature probe, if used) and rinse with deionized water.

Entered standard solution

Current temperature

[961.00] uS/cm conductivity CAL MULT K

10.11 measured K 23.0°C [1] K point index

10.110 K value

95.48uS conductance ENTER TO STORE

UP DOWN DIGIT NEXT

Point numbe

Stored value

After calculating and storing multiple cell constants, the Operation screen shows the current cell constant used during measurements. Notice that the K= changes to Km= to show that multiple cell constants are in use.

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System Configuration and Operation Section 3

OPERATION

3.150 uS/cm

11:33AM 24.38°C

CELL SETUP DIAG RANGE

Km=1.124

25.0°C

1.50%/°C T CELL

Offset

When measuring conductance below 10uS (resistance above 100KΩ), the insulation resistance of the cell leads may be a source of error. This error may be greatly reduced by allowing the 3200 to calculate and store a zero offset value.

From the Calibrate K menu, press the [OFFSET] soft key to enter the Offset menu.

OFFSET Offset value is only used below 10uS

Current offset

0.0000uS offset To measure, connect a clean, dry cell and press MEASURE

REMOVE MEASURE

Current cell constan

To measure and store the offset for the current cell in the currently selected configuration, connect a clean, dry cell to the 3200, then, press the [MEASURE] soft key. The current offset is displayed on the screen.

OFFSET Offset value is used below 10uS

Current offset

To remove a stored offset (set the offset to zero), press the [REMOVE] soft key.

0.0015uS offset To measure, connect a clean, dry cell and press MEASURE

REMOVE MEASURE

Send

From the Calibrate K menu, the [SEND] soft key may be used to send the current cell constant data to a computer or serial printer via the RS232 port.

3.3 TEMPERATURE COMPENSATION

There are four options for temperature compensation on the YSI 3200.

1. Directly enter a linear temperature compensation factor (0 - 10%/°C)

2. Select a standard non-linear compensation curve (ultrapure, natural).

YSI Incorporated Model 3200 16

System Configuration and Operation Section 3

3. Measure a linear temperature compensation factor.

4. Measure a non-linear temperature compensation curve.

The previous section, 3.2 Cell Calibration, describes the first two options. The following section, Temp, describes how options 3 and 4 are used.

TEMP

From the Cell menu, press the [TEMP] soft key to enter the Cell Temp menu. This menu is used to calculate the linear or non-linear temperature compensation coefficient of a particular solution and store it in the currently selected configuration. Although the cell used is recorded, the temperature compensation information can be used with any cell. Non-linear temperature compensation [N.L. Temp] records multiple points over a temperature range and stores the overall curve. Linear temperature compensation [L. Temp] measures a solution at only two points and calculates a linear temperature coefficient in %/°C. Alternatively, you may input a linear temperature compensation factor (0 - 10%/°C). See 3.2 Cell Calibration, Configure.

[5] # Configuration number CELL TEMP

[CONFIG 5] Title 0.0000uS offset [Single] Cell Cal [1.00] K [Linear] Comp [1.50] %/°C Comp val [0.68] T.D.S. mult [25.0] °C Comp Temp

L. TEMP N. L. TEMP SEND

Linear Temperature Compensation

From the Cell Temp menu, press the [L. TEMP] soft key to enter the Lin Temp menu. This menu enables the user to calculate the linear temperature compensation coefficient of a solution by measuring it at two temperature points.

NOTE : If you already know the linear temperature compensation coefficient of the solution, you may enter it directly in the Configure menu. See 3.2 Cell Calibration, Configure.

[25.00] °C p1 LIN TEMP [0.00] uS p1 22.61 °C [25.00] °C p2 895.1 uS [0.00] uS p2

[0.00] %/°C calculated ENTER TO STORE

POINT 1 POINT 2

To calculate and store the linear temperature compensation coefficient:

1. Verify that the current configuration contains the correct cell constant for the current cell.

2. Clean the container and YSI 3200 Series cell (or YSI 3400 Series and temperature probe)

with deionized water.

3. Rinse the cell (and temperature probe, if used) with some of the solution to be analyzed.

Stored points

Current

Calculated temperature coefficient

YSI Incorporated Model 3200 17

System Configuration and Operation Section 3

4. Place the cell (and temperature probe, if used) in the solution at the first desired

temperature point and wait for the reading to stabilize. Ensure that the cell and temperature probe are submerged and that no air bubbles are trapped in the cell.

5. Press the [POINT 1] soft key to store point 1.

6. Place the cell (and temperature probe, if used) in the same solution at the second desired

temperature point and wait for the reading to stabilize.

7. Press the [POINT 2] soft key to store point 2.

8. Remove the cell (and temperature probe, if used) and rinse with deionized water.

The linear temperature compensation coefficient has now been calculated and stored under the current cell configuration.

NOTE: Any non-linear temperature compensation curve stored under the current configuration will be retained.

Non-linear Temperature Compensation

From the Cell Temp menu, press the [N. L. TEMP] soft key to enter the NL Temp menu. This menu enables the user to calculate a non-linear temperature compensation curve for a solution by measuring it while the temperature is changed.

NL TEMP [20.00] °C High 17.34 °C [0.00] °C Low 1.34 S

CURRENT CURVE WILL BE ERASED START END

Current

Temperature end

To calculate and store the non-linear temperature compensation curve:

1. Verify that the current configuration contains the correct cell constant for the current cell.

2. Clean the container and YSI 3200 Series cell (or YSI 3400 Series and temperature probe)

with deionized water.

3. Rinse the cell (and temperature probe, if used) with some of the solution to be analyzed.

4. Place the cell (and temperature probe, if used) in the solution at one end of the

temperature range that you want to compensate over and wait for the reading to stabilize.

5. Press the [START] soft key.

6. Change the temperature of the solution while the cell (and temperature probe, if used) is

measuring it.

7. When the temperature reaches the end of the range you want to compensate over, press

the [END] soft key.

8. Remove the cell (and temperature probe, if used) and rinse with deionized water.

The non-linear temperature compensation curve has now been calculated and stored under the current cell configuration.

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System Configuration and Operation Section 3

Send

From the Cell Temp menu, the [SEND] soft key may be used to send the current temperature compensation data to a computer or serial printer via the RS232 port.

3.4 PLATINIZATION

The 3200 can be used to replatinize the electrodes of the cell. See section 6.2 Platinization for details.

3.5 DISPLAY CONFIGURATION

The 3200 display is extremely flexible. The user may select from two screen sizes and may select what data is displayed in each field.

SETUP

3.150 uS/cm

11:33AM 24.38°C

K=10.100

25.0°C

1.50%/°C T CELL

DISPLAY TIME/DATE SYSTEM RANGE

From Operation mode, press the [SETUP] soft key, then press [DISPLAY] to enter the Setup Disp menu. The default display is the large display with three user selectable fields. Conductivity is in the large field and temperature and time are in the smaller fields.

SETUP DISP

13.15uS/cm

11:33AM 24.38°C

ENTER TO CHANGE UNITS SIZE NEXT LIGHT DARK

To change the display size, press the [SIZE] soft key. The small display contains six user selectable fields. The first three fields in the small display correspond to the fields of the large display. The following is an example of the small display.

K=10.100

25.0°C

1.50%/°C T CELL

1006 uS/cm 11:33AM

24.38°C 994.7Ωcm

YSI Incorporated Model 3200 19

SETUP DISP

K=0.098

25.0°C

System Configuration and Operation Section 3

684

ENTER TO CHANGE UNITS SIZE NEXT LIGHT DARK

mg/L TDS

0.4

ppt SAL

1.91%/°C T CELL

MEASUREMENT UNITS

Each of the six fields on the small display (three fields on the large display) may be setup by the user. Selection of fields is important, even if only the large display is used, because, when a reading is stored in the 3200 memory, the date, time, temperature and conductivity are stored, along with the first two additional fields (fields other than date, time, temperature and conductivity) currently on the display. These same selected fields are also used when logging data to a computer or serial printer.

1006 uS/cm 9999uS

65.68°F 97.8 Ω 684

ENTER TO CHANGE UNITS SIZE NEXT LIGHT DARK

mg/L TDS

0.4

ppt SAL

SETUP DISP

K=0.098

25.0°C

1.91%/°C T CELL

From the Setup Disp screen, press the [NEXT] soft key to select the field you want to change, then press [ENTER] repeatedly to change the field until the information you want is displayed. Each field may contain one of the following:

• Conductance, S, mS, uS

• Conductivity, S/cm, mS/cm, uS/cm

• Resistance, Ω (ohms), KΩ, MΩ

• Resistivity, Ω-cm, KΩ-cm, MΩ-cm

• Total Dissolved Solids, mg/L

• Salinity, ppt

• Time

• Date

• Temperature, °C

• Temperature, °F

• Blank

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System Configuration and Operation Section 3

CONTRAST

The display contrast is adjusted from the Setup Display menu.

SETUP DISP

13.15 uS/cm

11:33AM 24.38°C

ENTER TO CHANGE UNITS SIZE NEXT LIGHT DARK

Press the [LIGHT] or [DARK] soft keys to change the display contrast as necessary.

K=0.100

25.0°C

1.50%/°C T CELL

TIME/DATE

From Operation mode, press the [SETUP] soft key, then press [TIME/DATE] to enter the Time/Date screen. This screen is used to set the time and date values and format.

TIME/DATE [ 8:34:04] AM [ 2/15/1997]

[AM/PM] time format [MM/DD/YY] date format

UP DOWN DIGIT NEXT

The first two fields are used to enter the current time and date. Use the [UP], [DOWN] and [DIGIT] soft keys to enter the correct time. Press [NEXT] to change to the date field, then enter the correct date. The default time and date formats are AM/PM and Month/Day/Year. To change these formats, use the [NEXT] soft key to select the field, then use the [UP] or [DOWN] soft key to change the format to 24Hr or Day/Month/Year. After you have entered the correct values, press [MODE] to save and exit to the Setup menu. Press [MODE] again to return to the Operation menu.

ALARMS

The 3200 has both high and low user programmable alarms. When an alarm is triggered, the 3200 screen will display “ send the information to a computer or serial printer via the RS232 port.

To activate the alarm(s):

YSI Incorporated Model 3200 21

ALARM! READINGS OUT OF LIMITS” and can also be set to beep and/or

System Configuration and Operation Section 3

1. From Operation mode, press the [SETUP] soft key, then, press [SYSTEM] to enter the Setup Sys menu. The following menu will be displayed.

[Yes] key beep SETUP SYS

[Off] alarm status [0.00] low [Off] beep on alarm [0.00] high [On] send on alarm [Conductance] uS alarm source

UP DOWN DIGIT NEXT

2. Use the [NEXT] soft key to select the Alarm status field, then press [UP] or [DOWN] to

change the Alarm status to “On”.

3. Press [NEXT] to select the Low field, then use the [UP], [DOWN] and [DIGIT] soft keys to

enter the set point for the low alarm.

4. Press [NEXT] to select the High field and use the [UP], [DOWN] and [DIGIT] soft keys to

enter the set point for the high alarm.

5. Press [NEXT] to select the alarm source, then press [UP] or [DOWN] to change the source.

The source may be conductance, conductivity or resistance.

6. Press [NEXT] to select “beep on alarm”, then press [UP] or [DOWN] to turn the alarm beeper

on or off.

7. Press [NEXT] to select “send on alarm”. When this parameter is enabled (On), readings will

be sent to a computer or serial printer whenever the alarm is triggered. Press [MODE] once, to return to the Setup menu, or two times to return to Operation mode. NOTE: To setup the communications parameters or select the report format and which data fields

will be sent over the RS232 serial port, see 4.3 Send, Send Setup.

BEEPER

The 3200 contains a beeper to indicate when a key has been pressed. The beeper may be turned on or off from the Setup Sys menu. Press the [SETUP] soft key, while Operation mode, then press [SYSTEM] to enter the Setup Sys menu .

[No] key beep SETUP SYS

[Off] alarm status [0.00] alarm low [Off] beep on alarm [0.00] alarm high [On] send on alarm [Conductance] uS alarm source

UP DOWN DIGIT NEXT

Beeper status

YSI Incorporated Model 3200 22

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