YSI ProDSS User Manual

USER MANUAL

DOCUMENT #626973-01REF

ProDSS

USER MANUAL

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Contents

Introduction 3

Safety information 3

Precautionary symbols 3

Product components 3

Battery use and battery life 4

Charging the battery pack 5

Battery replacement 6

Connect the handheld to the cable assembly 8

ProDSS sensor installation/removal 9

Operation 13

Keypad and navigation 13

Startup 14

Navigation 14

Main display description 15

System menu 16

Sensor menu 22

Calibration menu 28

Files menu 29

Taking measurements 32

Calibration 33

Before calibration 33

Calibration setup (pH, ORP, ISE, conductivity, turbidity) 33

Conductivity 35

Barometer 36

Dissolved oxygen 37

pH/ORP 39

Depth 41

Turbidity 42

ISEs: Ammonium, Nitrate, & Chloride 44

Maintenance and storage 51

ProDSS handheld instrument 52

Cable, bulkhead, and connectors 53

Sensor guard 53

Depth sensor maintenance and storage 54

Turbidity sensor 55

Conductivity/temperature sensor 56

Dissolved oxygen sensor 57

pH - pH/ORP sensors 61

ISE sensors 63

KorDSS software installation 67

Install the KorDSS software 68

ProDSS driver installation 69

KorDSS startup wizard 72

Accessories 73

Ordering 73

ProDSS handhelds 74

ProDSS cable assemblies (No sensors included) 74

ODO/OBOD sensor and cable assemblies - DO/Temp only 75

ProDSS smart sensors 75

Replacement sensor modules and ODO sensor caps 75

ProDSS accessories 76

Calibration standards 77

Safety and support 79

Rechargeable Lithium-Ion battery pack safety warnings and precautions 79

Service information 81

Technical support 81

Declaration of Conformity 82

Warranty 84

Appendix A - DO% calibration values 85

Appendix B - oxygen solubility table 87

Introduction

Thank you for purchasing the YSI Professional Digital Sampling System (ProDSS).

ProDSS features include:

• Digital smart probes that are automatically recognized by the instrument when connected

• Waterproof (IP-67) case

• Long-life rechargeable lithium-ion battery pack

• Color display and backlit keypad

• User-selectable cable options

• USB connectivity

• Global Positioning System (GPS) (optional)

• Depth sensor (optional)

• Large memory with extensive site list capabilities

• Rugged enclosure with rubber over-molded case and miltary-spec (MS) connectors

Safety information

Please read this entire manual before unpacking, setting up or operating this equipment. Pay attention to all precautionary statements. Failure to do so could result in serious injury to the operator or damage to the equipment. Make sure that the protection provided by this equipment is not impaired. Do not use or install this equipment in any manner other than that speciﬁed in this manual.

NOTICE: The manufacturer is not responsible for any damages due to misapplication or misuse of this product

including, without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent permitted under applicable law. The user is solely responsible to identify critical application risks and install appropriate mechanisms to protect processes during a possible equipment malfunction.

Precautionary symbols

NOTE: Information that requires special emphasis

NOTICE: Indicates a situation which, if not avoided, may cause damage to the instrument

CAUTION: Indicates a potentially hazardous situation that may result in minor or moderate injury

WARNING: Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death

or serious injury

Product components

Carefully unpack the instrument and accessories and inspect for damage. If any parts or materials are damaged, contact YSI Customer Service at 800-897-4151 (+1 937 767-7241) or the authorized YSI distributor from whom the instrument was purchased.

Introduction

Battery use and battery life

The ProDSS uses a rechargeable lithium-ion (Li-Ion) battery pack as a power source. The battery comes pre-installed in the ProDSS and does not need to be replaced until the battery charge capacity is deemed unacceptable by the user. The battery is shipped at ~50% full capacity and charging the battery is not required before ﬁrst use.

Battery life depends on use, enabled parameters, LCD brightness, and GPS use. As with all lithium-ion batteries, battery life will decline over time and use. This decay is typical and should be expected.

A new ProDSS battery is expected to last for the following durations (25 °C (77 °F), auto sampling, GPS on, keypad backlight off):

• ProDSS instrument only - 48 hours

• ProDSS with fully loaded cable assembly and 25% (Default) LCD brightness - 20 hours

• ProDSS with fully loaded cable assembly and 100% LCD brightness - 14 hours

To increase battery life, enable manual sampling mode (Sampling on page 20). Manual sampling mode powers the sensor/s on to take a measurement and then powers down to conserve battery life. Battery life may also depend on the battery charging practices used. For maximum battery life, keep the battery 40% to 80% charged. Also, a larger discharge (e.g. to 50%) is better than a small discharge (e.g. to 90%) between recharges.

Introduction

Charging the battery pack

A USB cable is included with the ProDSS to charge the instrument battery pack and connect the instrument to a PC. The instrument battery pack can be charged from the AC power adapter, directly from a computer USB connection or from an external, portable USB battery pack (sold separately, see ProDSS accessories on page 76).

Plug the USB connector into the AC power adapter, computer USB connector or external USB battery pack, then plug the micro USB connector into the ProDSS instrument (Figure 1).

NOTE: The ProDSS internal charge controller only allows the battery pack to be charged if the temperature is

between 0 and 45 °C (32 and 113 °F).

WARNING: Charge the battery pack in an open area away from ﬂammable materials, liquids, and surfaces. Read

Rechargeable Lithium-Ion battery pack safety warnings and precautions on page 79.

The ProDSS will charge faster when plugged into an AC outlet for charging rather than a PC’s USB port. For the instrument to recognize that it is using AC power, you must start charging the ProDSS while on. After the instrument recognizes it is being charged, it can be turned off to ﬁnish charging.

When using the AC adapter, it takes approximately 14 hours to charge the ProDSS battery when the instrument is turned off during the charge. The amount of time required to completely charge the battery pack when the ProDSS is initially turned on during the charge is approximately 9 hours.

Figure 1 Connecting the ProDSS to AC power supply

Introduction

Battery replacement

NOTE: The battery pack is pre-installed in the ProDSS instrument.

WARNING: Do not charge or handle a battery pack that is hot to the touch. Failure to follow the safety warnings

and precautions can result in personal injury and/or instrument damage not covered under warranty. Read Rechargeable Lithium-Ion battery pack safety warnings and precautions on page

79.

1. Remove the battery pack cover by unscrewing (counter-clockwise) the four screws with a ﬂat or Phillips head screwdriver (Figure 2 on page 7).

NOTE: The retaining screws are captured into the battery pack cover and are not removable.

2. If replacing an existing battery pack, remove the Li-Ion battery pack and battery pack gasket/cradle. With two ﬁngers, grasp the battery pack connector and pull the connector straight up to disconnect and remove.

NOTE: Properly dispose of the old battery pack (Battery Disposal on page 80).

NOTE: A new gasket/cradle is included with a new battery pack to prevent water leaking into the instrument case.

When replacing the battery pack, use the new battery pack gasket/cradle supplied with the replacement battery pack.

3. Inspect the replacement battery pack and battery pack gasket/cradle for damage. Contact YSI customer service if the new battery pack and/or replacement gasket/cradle is damaged.

4. Correctly align and seat the battery pack gasket/cradle and battery pack into the instrument.

5. Align the battery pack connector wire terminals with the three instrument pins, then connect the battery pack to

the instrument.

NOTICE: Make sure that the three wire terminal connectors and three instrument pins are correctly aligned

before connecting the battery pack connector. Incorrect installation can damage the battery pack connectors or instrument pins.

6. Install the battery pack cover, then tighten the cover screws. Make sure that the cover sealing surface is correctly aligned and free of any contamination or damage.

NOTICE: Overtightening the cover screws can damage the battery cover.

Introduction

Figure 2 Battery replacement

1 Battery pack cover 4 Instrument pin connectors

2 Battery pack 5 Battery pack gasket/cradle*

3 Battery pack connector 6 Battery pack gasket/cradle installed

*Color shown for reference

Introduction

Connect the handheld to the cable assembly

The ProDSS cable connectors are keyed for positive mating and to prevent connector damage (Figure 3). The ProDSS instrument retains its IP-67 rating when the cable is disconnected. However, the connectors are not wet-mateable and should be clean and dry before connecting.

Align the keys on the cable assembly connector with the slots on the instrument connector. Push together ﬁrmly, then twist the outer ring clockwise until it locks into place.

Figure 3 Keyed connectors

1 Handheld female

connector

2 Cable male connector

3 Keyed area of

connectors

ProDSS sensor installation/removal

NOTICE: The ProDSS bulkhead and sensor connectors are not wet-mateable. Make sure that the sensor and

bulkhead connectors are clean and dry before sensor installation.

Introduction

Figure 4 Sensor installation

1 Sensor 4 Sensor retaining nut

2 Port plug 5 Sensor installation/removal tool

3 Bulkhead

Sensor installation

The ports on the ProDSS bulkhead are universal; therefore, you can install any sensor into any port. For highest accuracy, always install a conductivity/temperature sensor to compensate all measurement data for temperature and dissolved oxygen data for conductivity.

1. Remove and discard the dust plugs shipped with the instrument (Figure 5 on page 10).

2. Inspect the bulkhead port for contamination. If the port is wet, clean it with compressed air.

3. Apply a thin coat of Krytox o-ring lubricant to the sensor o-rings. Wipe off any excess o-ring grease with a lint-

free cloth.

4. Carefully align the sensor and bulkhead connectors by inserting the sensor into the port then gently rotating the sensor until the connectors align. Once aligned, push the sensor toward the bulkhead until the sensor seats in the port.

5. Carefully ﬁnger-tighten the retaining nut clockwise.

NOTICE: If any resistance is felt, loosen the retaining nut completely to prevent cross-threading. Incorrect

installation may cause damage to the sensor or bulkhead that is not covered by the warranty.

6. Use the sensor installation/removal tool to tighten the retaining nut clockwise until snug, about a 1/4 to 1/2 additional turn of the retaining nut.

NOTICE: Do not over-tighten the retaining nut. Over-tightening can cause damage to the sensor or bulkhead

not covered by the warranty.

Introduction

Sensor removal

To remove a sensor, insert the sensor installation/removal tool into the retaining nut, then rotate the retaining nut counterclockwise to loosen. After the retaining nut has been completely unscrewed from the bulkhead, pull the sensor straight out of the port and place it on a clean surface.

NOTICE: Install a port plug if not reinstalling a sensor in the exposed port. Exposure to water can cause

damage or corrosion to the bulkhead connectors not covered by the warranty.

Port plugs

Figure 5 Port plugs

1 Shipping dust cover* 2 Port plug

*Color shown for reference

To protect the bulkhead connectors from damage, install a port plug into any port without an installed sensor. Port plugs and a tube of o-ring lubricant are included in the maintenance kit that ships with all ProDSS cables. Refer to the accessories section if an additional maintenance kit is needed (Ordering on page 73).

NOTICE: The shipping dust covers installed on the bulkhead when purchased (not sensor installation/removal

tool compatible) are not o-ring sealed and must be replaced with a port plug before ﬁeld use.

NOTICE: Do not submerge the bulkhead without a sensor or port plug installed in all ports.

Installation

1. Apply a thin coat of Krytox o-ring lubricant to the o-rings on the plug port.

2. Remove any excess lubricant from the o-rings and port plug with a lint-free cloth.

3. Insert the port plug into the empty port and press until ﬁrmly seated.

4. Finger-tighten the port plug clockwise to install. If necessary, use the sensor installation tool to make sure that

the plug is fully seated into the port.

NOTICE: The o-rings will not be visible if a port plug is correctly installed.

NOTICE: Do not over-tighten the port plug. Over-tightening can cause damage to the port plug or bulkhead

not covered by the warranty.

Introduction

Sensor guard and weight installation

1. Carefully slide the sensor guard over the bulkhead and attached sensors/port plugs. Push the sensor guard

toward the bulkhead until the sensor guard threads align with the bulkhead threads.

2. Carefully ﬁnger-tighten the sensor guard clockwise.

NOTICE: If any resistance is felt, loosen the sensor guard completely to prevent cross-threading. Incorrect

installation may cause damage to the sensor guard or bulkhead that is not covered by the warranty.

NOTICE: Do not submerge the bulkhead without a sensor or port plug installed in all ports.

Figure 6 Sensor guard and weight installation

1 Sensor guard 4 Depth sensor (if equipped)

2 Bulkhead 5 Weight

3 Bulkhead threads

Introduction

Sensor guard weights

To help stabilize the sensors when proﬁling at deeper depths, a sensor guard weight is supplied with cables 10 meters and longer. To attach the weight, carefully hand-tighten it clockwise on to the bottom of the sensor guard (Figure 6 on

page 11).

NOTICE: If any resistance is felt, loosen the sensor guard weight completely to prevent cross-threading.

Incorrect installation may cause damage to the sensor guard.

The bottom of the weight is threaded so that additional weights can be added if needed. See ProDSS accessories on

page 76.

NOTE: Do not have any weights installed on the sensor guard when calibrating using the calibration cup.

Operation

Keypad and navigation

1112

System Probe Calibration File

Cal

Esc

ENTER

5 6

Figure 7 Keypad description

1 System: Opens the system menu. Use to adjust

system settings

2 Exit/Escape key: Exits to the Run screen. When in

an alpha/numeric entry screen, returns to previous menu

3 Left arrow key: Navigate left in an alpha/numeric

entry screen. Push to return to previous menu in all screens except alpha/numeric entry. On the Run screen, push to show graphical representations of the displayed measurements. Push the right or left arrow to return to the Run screen

4 Help: Shows context sensitive help 10 File: Opens the ﬁle menu. Use to view logged data

5 Up/down arrow keys: Scroll through menus or

enter numbers and letters

6 Enter key: Push to conﬁrm selections. On the Run

screen, push to log a single data point or start continuous data logging

7 ON/OFF: Turn on or turn off the instrument

8 Right arrow key: Navigate right in an alpha/

numeric entry screen. On the Run screen, push to show graphical representations of the displayed measurements. Push the right or left arrow to return to the Run screen. In the View Data screen, push to view additional parameters in the data set

9 Backlight: Turns the keypad backlight on or off for

use in low light conditions

and GLP ﬁles, backup data to a USB stick, and delete data

11 Calibrate: Opens the calibration menu. Use to

calibrate all parameters except temperature

12 Probe: Opens the sensor menu. Use to setup

sensors, change the measurements shown on the run screen, and turn on/off Auto Stable and GPS

Operation

Esc

Startup

Push the key to turn on the handheld. If the handheld does not turn on, make sure that the battery pack is correctly

installed and charged. Push and hold the

key for 1.5 seconds to turn the handheld off.

Navigation

The ProDSS contains menus to change user-deﬁned options, functions, and parameters. Use the arrow keys

(

and ) to highlight different options within menus and sub-menus, then push the

Push the key to return to the previous menu.

NOTE: When in an alpha/numeric screen, the

return to the previous menu.

Push the key. Enabled functions appear as a circle with a dot

circle only or an empty box .

key to return to the Run screen. To enable or disable an option, highlight the option, then push the

key is for alpha/numeric navigation only. Push the

or a box with a check mark . Disabled functions appear as a

ENTER

key to select the option.

key to

ENTER

Alpha/numeric entry

When required, an alpha or alpha/numeric entry screen will be shown. When ﬁnished entering information, highlight

ENTER, then push the

NOTE: When in an alpha/numeric screen, the

return to the previous menu.

ENTER

key to save the entry (Figure 8).

key is for alpha/numeric navigation only. Push the

key to

Figure 8 Alpha/numeric and numeric entry screens

1 User entry ﬁeld 4 Enter selection

2 Delete entire entry 5 Upper/lowercase

3 Backspace

Operation

Main display description

The main display (Run screen) shows the current measurements as deﬁned in the Sensor Display menu (Sensor Display on page 25). If more measurements are selected than can be displayed on the Run screen, a scroll bar will be shown. Use the and arrow keys to view the additional measurements (Figure 9).

The message area shows status messages, error messages, and information about selected functions.

Figure 9 Main display example

1 Log or sampling (update measurements) prompt on

Run screen (single or continuous)

2 Current screen/menu 7 USB/PC connection indicator

3 Date/Time 8 Scroll bar

4 GPS signal indicator 9 Message area

5 Battery charging indicator 10 Displayed measurements

6 Battery charge %

Operation

System menu

Push the System key to view and adjust instrument settings. Highlight a sub-menu then push the the sub-menu options (Figure 10).

Pre-deﬁned or user-selected options are noted within brackets ([]). See Alpha/numeric entry on page 14.

Use the System menu to:

• Set the date and time (Date/Time on page 17)

• Change the user-deﬁned Good Laboratory Practices (GLP) options

(GLP menu on page 17)

• Change the instrument language setting (Language on page 19)

• Change the radix point (Radix Point on page 19)

• Change logging options (Logging on page 19)

• Change sampling options (Sampling on page 20)

• Set the handheld auto-shutoff time (Auto-Shutoff on page 20)

• Set the backlight mode (Backlight on page 21)

• View the software version (Alpha/numeric entry on page 14)

• View the handheld serial number (Serial # on page 21)

• View and adjust the Unit ID (Unit ID on page 21)

• View the sensor speciﬁc information (Sensor info on page 22)

Figure 10 System menu

• Adjust the display brightness (Brightness on page 22)

ENTER

key to view

Operation

Date/Time

→ Date/Time

For accurate logging and GLP data, correctly set the date and time options (Figure 11). Select any of the following options to set the Date/

Figure 11 Date/Time

GLP menu

Detailed sensor calibration information is stored in the Good Laboratory Practice (GLP) ﬁle for later review.

One GLP ﬁle is used to store all calibration records. The instrument’s internal memory can save up to 400 individual calibration records. After 400 records, the instrument will overwrite previously stored calibration records, starting with the oldest.

Time in the ProDSS.

Date/Time options:

• Set YY/MM/DD, MM/DD/YY, DD/MM/YY or YY/DD/MM date format

• Set the correct date

• Select 12 or 24 hour time format

• Set the correct time

To prevent the permanent loss of GLP records, periodically download the GLP ﬁle to a computer using the KorDSS software.

NOTE: GLP ﬁles uploaded to the PC will overwrite a previously downloaded GLP ﬁle if it has the same ﬁle name.

To prevent data loss, move or rename previously downloaded GLP ﬁles before downloading the GLP ﬁle.

GLP saved information

See Figure 12.

• Sensor calibrated

• Date/time stamp

• Sensor ID

• Sensor software version

• Calibration method (Conductivity and ODO calibrations)

• Calibration value

• Temperature

• User ID (optional)

• Probe ID (optional)

• User ﬁelds #1 and #2 (optional)

• Calibration status

Figure 12 GLP record example (single

point % DO calibration)

Operation

GLP Options

→ GLP → Options

User ID, Probe ID, or User Field #1 or 2 can be user-deﬁned for positive GLP ﬁle identiﬁcation of:

• The person calibrating the instrument.

• The sensor/cable serial number used during calibration (or other,

user-deﬁned Probe ID).

• Other user-speciﬁc identiﬁcation (User Field #1 and #2) (Figure 13).

Figure 13 GLP Options

Figure 14 Re-Cal Prompts

NOTE: User Field can be used to describe the condition of the

probe. For example, new sensor or new ODO cap.

Re-Cal Prompts

→ GLP → Options → Re-Cal Prompts

Re-Cal Prompts provide a reminder to recalibrate a probe in the user-deﬁned number of days (Figure 14).

The Re-Cal prompt will be displayed in the message area of the main display when the set time has elapsed (Figure 9 on page 15).

Select the desired sensor Re-Cal prompt, then enter the desired number of days before the Re-Cal prompt occurs.

Set the sensor value to zero (0) days (default) to turn off Re-Cal prompts.

NOTE: When enabled and the set amount of time since the last

calibration has passed, the Re-Cal prompt will be shown when the instrument is turned on.

GLP Security

Figure 15 GLP Security

→ GLP → Security

The Calibration menu can be password protected to prevent accidental or unauthorized sensor calibration (Figure 15).

1. From the GLP menu, select Security, then enter the default password “ysi123”.

2. Select Set Password [] and change the default password.

3. Select the Protect Cal check box to password protect the

Calibration menu.

NOTE: Write down and keep the password in a safe place. Contact

YSI Technical Support if you lose the password (Technical

support on page 81).

Figure 16 Language

Operation

Language

→ Language

The ProDSS is shipped with English enabled. If a different language is desired and selected, the ProDSS will take approximately 10 to 20 seconds to enable the new language (during the ﬁrst installation only).

Optional languages:

• French

• German

• Italian

• Japanese

• Norwegian

• Portuguese

• Simpliﬁed Chinese

• Spanish

• Traditional Chinese

Radix Point

Figure 17 Radix Point

Figure 18 Logging

→ Radix Point

The radix point can be changed to display a comma or a decimal in numeric displays (e.g. 1.00 becomes 1,00 when Comma is selected) (Figure 17).

Logging

→ Logging

The Logging menu allows user-deﬁned site and Data ID lists to be added to the logged data. Add a Site or Data ID, then select the applicable check box to log data to that site and/or Data ID (Figure 18).

Continuous Mode ( Interval logging): Select the Continuous Mode check box and enter the user-deﬁned Log Interval (in HH:MM:SS hours:minutes:seconds) to log samples continuously at the speciﬁed time interval. The Run screen will display Start Logging... when in Continuous Mode.

One sample logging: Clear the Continuous Mode check box. The Run screen will display Log One Sample. A sample will be logged each

time the

ENTER

key is pushed when in the Run screen.

Operation

Esc

Sampling

→ Sampling

Figure 19 Sampling

Auto sampling mode continuously updates measurements on the display (Figure 19).

Manual mode helps conserve battery power. The user-deﬁned Sample Period determines the measurement time limit.

When in Manual mode, the instrument will take measurements for the duration of the Sample Period then “lock” or hold the readings on the display (sample period default 50 seconds, user-deﬁned between 15 to 60 seconds).

Once the measurements are locked, push the

data, or the

key and then the

ENTER

key to take a new measurement.

ENTER

key to log the held

Enter the desired Sample Period time.

NOTE: When both Continuous Logging Mode and Manual

Sampling mode are enabled, the ProDSS will power the sensors on and take measurements for 15 seconds before logging a data set.

Auto-Shutoff

→ Auto-Shutoff

Figure 20 Auto-Shutoff

To conserve battery power, auto-shutoff powers off the instrument after a user-deﬁned time period (in minutes) (Figure 20). Set to 0 (zero) to disable Auto-Shutoff.

Backlight

→ Backlight

Operation

Figure 21 Backlight

In Automatic mode, the instrument display will dim 60 seconds after the last key was pushed. Once any key is pushed, the instrument display will return to the user-deﬁned brightness setting and the keypad backlight will turn on. The screen will dim and the keypad backlight will turn off after another 60 seconds of inactivity.

In manual mode, the instrument display remains at the user-deﬁned brightness until manually changed and the keypad backlight is turned on and off by the Backlight key (Figure 21).

NOTE: In bright conditions, set the backlight to Manual mode.

Software (Sw) Version

→ Sw Version

Sw Version (System menu on page 16)

Sw Version shows the ProDSS software version number. The latest instrument software version is available at ysi.com. Instrument software can be updated through the KorDSS PC software program when connected to the internet or if the ﬁrmware ﬁle has been transferred to the PC. See the KorDSS help section for more information.

Serial #

→ Serial # (System menu on page 16)

Serial # shows the serial number of the ProDSS handheld instrument. Note the serial number when contacting YSI support.

Unit ID

→ Unit ID (System menu on page 16)

Unit ID identiﬁes the instrument in the KorDSS PC software program that was included with the instrument.

Select Unit ID to change the default ID.

Operation

Sensor info

→ Sensor info (System menu on page 16)

Sensor info shows measurement data, and hardware/software information for each component of the system: instrument, sensor, and bulkhead. Use the and arrow keys to scroll through the components.

Brightness

→ Brightness

The screen brightness can be adjusted to accommodate lighting conditions and to conserve battery power (Figure 22).

Select Brightness then use the and arrow keys to adjust the screen brightness.

NOTE: In bright conditions, set the screen brightness to 75% or

greater.

Figure 22 Display Brightness

Sensor menu

Use the Probe key to access the Sensor menu and change sensor settings (if applicable), enable the measurement units displayed on the Run screen, set Auto Stable parameters, and if equipped, turn on/off GPS.

Push the

menu then push the

Pre-deﬁned or user-selected sensor settings are noted within brackets ([]).

Figure 23 Probe (Sensor) menu

key to access the sensor menu (Figure 23). Highlight a sub-

ENTER

key to view sub-menu options.

Operation

Sensor Setup

→ Setup

The Sensor Setup menu will show all sensors installed on the bulkhead (Figure 24). If a sensor is installed on the bulkhead and is not listed on the Sensor Setup menu (<None> displayed), check the sensor and cable connections (ProDSS sensor installation/removal on page 9).

Figure 24 Sensor Setup

Figure 25 Setup ODO

Setup ODO

→ Setup → ODO

Local DO: Enable or disable localized DO% measurements. When

enabled, the calibration value is set to 100% regardless of altitude or barometric pressure. When enabled, an L will be shown next to DO% on the run screen. DO mg/L measurements are unaffected when Local DO is enabled (Figure 25).

LDS: Last Digit Supression (LDS) rounds the DO value to the nearest tenth, e.g. 8.27 mg/L becomes 8.3 mg/L.

Sensor Cap Coefﬁcients: The sensor cap coefﬁcients must be updated after sensor cap replacement. Update the sensor cap coefﬁcients using the KorDSS software and the coefﬁcient sheet provided with the new sensor cap.

Setup Turbidity

Figure 26 TSS coefﬁcients

→ Setup → Turbidity

TSS Coefﬁcients: The Total Suspended Solids (TSS) coefﬁcients are

calculated in KorDSS by entering turbidity and TSS correlation data.

Measure turbidity and take a grab sample for laboratory analysis of TSS to obtain a value pair for the correlation. At least two and up to six value pairs can be entered into KorDSS.

The TSS coefﬁcients can be entered manually or updated through the KorDSS software (Figure 26).

For highest accuracy, obtain 6 values pairs and calculate new coefﬁcients for each unique sampling site.

Operation

Setup pH

→ Setup → pH

Figure 27 Setup pH

Figure 28 Setup Conductivity

Select USA auto-buffer recognition (4.01, 7.00, and 10.00) or NIST autobuffer recognition (4.01, 6.86, and 9.18) (Figure 27).

Setup Conductivity

→ Setup → Conductivity

Temp Ref (Temperature reference): Reference temperature used to

calculate temperature compensated speciﬁc conductance. All speciﬁc conductance values are compensated to the Temp Ref temperature. The default value is 25 °C (77 °C) (Figure 28). Enter a new value between

15.00 °C (59 °F) and 25.00 °C (77 °F).

%/°C (Percent per degree Celsius): Temperature coefficient used to calculate temperature compensated specific conductance. The default is

1.91% based on KCl standards. Enter a new value between 0 and 4%.

TDS Constant: Multiplier used to calculate an estimated Total Dissolved Solids (TDS) value from conductivity. The multiplier is used to convert speciﬁc conductance in mS/cm to TDS in g/L. The default value is 0.65. Enter a new value between 0 and 0.99.

This multiplier is highly dependent on the nature of the ionic species present in the water sample. To be assured of moderate accuracy for the conversion, you must determine a multiplier for the water at your sampling site. Use the following procedure to determine the multiplier for a speciﬁc sample:

1. Determine the speciﬁc conductance of a water sample from the

site.

2. Filter a portion of water from the site.

3. Carefully measure a volume of the ﬁltered water. Completely

evaporate to yield a dry solid.

4. Accurately weight the remaining solid.

5. Divide the weight of the solid (in grams) by the volume of water

used (in liters) to yield the TDS value in g/L for the site.

6. Divide the TDS value in g/L by the speciﬁc conductance of the water in mS/cm to yield the conversion multiplier.

NOTE: Make sure to use the correct units.

NOTE: If the nature of the ionic species at the site changes

between sampling studies, the TDS values will be in error. TDS cannot be calculated accurately from speciﬁc conductance unless the make-up of the chemical species in the water remains constant.

Setup Depth

→ Setup → Depth

For ProDSS bulkheads with the depth sensor:

Operation

Figure 29 Setup Depth

The ProDSS cable assemblies with a depth sensor in the bulkhead can measure virtual vented depth (Figure 6 on page 11). The virtual vented depth measurement allows for real time compensation for atmospheric pressure using the instrument’s barometer.

Depth offset: Depth offset can be used if referencing water elevation against a known datum. If a depth offset is entered (in meters), the output value will shift by the value of the offset (Figure 29).

Altitude/Latitude: To compensate for atmospheric pressure based on elevation and gravitational pull, enter the local altitude in meters relative to sea level and latitude in degrees where the ProDSS is sampling.

Latitude effect: Varying latitudes cause a 200 mm change in depth from equator to pole.

Altitude effect: Varying altitudes cause approximately 90 mm change from sea level to 8000 m. A 100 m change causes 1.08 mm of change to the readings.

Sensor Display

→ Display (Figure 30)

Figure 30 Sensor Display

The Sensor display menu determines the measurements that are shown on the Run screen (Figure 3 Main display example on page 28). The Run screen will only show measurements for sensors that are attached to the cable bulkhead.

If more measurements are selected than can be displayed on one screen, a scroll bar will be shown. Use the and keys to scroll through the measurements.

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