Eutech instruments PD 300 User Manual

Instruction Manual

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CyberScan PD 300

Waterproof Hand-held pH/Dissolved Oxygen/Temperature Meter

68X248910 05/2000 ver 1

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Preface

This manual serves to explain the use of the Waterproof CyberScan PD 300 hand-held meter. It functions in two ways, firstly as a step by step guide to help you to operate the meter. Secondly, it serves as a handy reference guide. It is written to cover as many anticipated applications of the Waterproof CyberScan PD 300 meter as possible. If there are doubts in the use of the CyberScan, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor.

Eutech Instruments cannot accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument.

Remember to fill in the guarantee card and mail it back to your authorized distributor or Eut ech Instruments Pte Ltd.

The information presented in this manual is subject to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd.

TABLE OF CONTENTS

1 INTRODUCTION 1 2 DISPLAY AND KEYPAD FUNCTIONS 2

2.1 Display 2

2.2 Keypad 3

3 PREPARATION 4

3.1 Inserting the Batteries 4

3.2 Probe Information 5

4 CALIBRATION 7

4.1 Preparing the meter for calibration 7

4.2 pH Calibration 7

4.3 Dissolved Oxygen Calibration 10

4.4 Dissolved Oxygen Calibration in % Saturation 11

4.5 Dissolved Oxygen Calibration in mg/l (ppm) mode 12

4.6 Temperature Calibration 13

5 MEASUREMENT 14

5.1 Taking pH Measurements 14

5.2 Taking DO readings 18

5.3 Taking Pressure/Salinity Compensated DO measurements 20

6 HOLD FUNCTION 21 7 ADVANCED SETUP FUNCTIONS 22

7.1 Advanced SETUP Mode Detailed Overview 22

7.2 P1.0: Viewing previous pH calibration data 26

7.3 P2.0: Viewing pH electrode data 27

7.4 P3.0: pH Measurement confi gu rati on 28

7.5 P4.0: Resetting to factory default settings (pH) 32

7.6 dPr: Dissolved Oxygen Parameters 33

7.7 OFS: Offset for % Saturation Measurement 36

7.8 CAL: Previous Calibration Information 37

7.9 ELE: Electrode Properties 38

7.10 COF: Unit Configuration 40

7.11 LCd: Adjusting LCD Brightness 44

7.12 rSt: Resetting to Factory Default Setting (DO) 45

8 PROBE CARE AND MAINTENANCE 46

8.1 pH Electrode care 46

8.2 Dissolved Oxygen Principle 48

8.3 Probe Care 49

8.4 Membrane Replacement 49

8.5 Electrolyte Solution 51

9 TROUBLE SHOOTING GUIDE 52 10 ERROR MESSAGES 53 11 SPECIFICATIONS 54 12 ACCESSORIES 55 13 ADDENDUM 1: DISSOLVED OXYGEN& METER THEORY 56 14 ADDENDUM 2: PRESSURE VS ALTITUDE TABLE 57 15 ADDENDUM 4: METER FACTORY DEFAULT SETTINGS 58 16 WARRANTY & RETURN OF ITEMS 59

1 INTRODUCTION

Thank you for selecting Eutech Instruments waterproof portable meter. This meter is a microprocessor-based instrument that is designed to be handy capable of allowing one-hand operation. It is capable of measuring pH, Dissolved Oxygen (mg/l), % Saturation of Oxygen and Temperature. It is completely WATERPROOF --- and it FLOATS!

This meter has many user-friendly features ---- all of which are completely accessible through the water-resistant membrane keypad. Your meter includes a 5-m pH electrode (ECFE72522-05B), dissolved oxygen with integrated temperature sensor in a 3-m submersible cable (EC-DOHANDY) with maintenance kit, instruction manual, and a warranty card. All these are contained in a hard plastic carrying case which makes it ideal for outdoor field measurement. Please read this manual thoroughly before operating your meter.

Figure 1: Waterproof CyberScan PD 300 Dissolved Oxygen Meter

2 DISPLAY AND KEYPAD FUNCTIONS

2.1 Display

The LCD has a primary and secondary display.

• The primary display shows the measured pH and DO value (either in mg/l, ppm or %), depending on units of measurement selected.

• The secondary display shows the measured temperature in °C.

The display also shows error messages, keypad functions and program functions. See Figure

Figure 2: Full LCD Screen

1. SETUP mode indicator

2. MEASurement mode indicator 8. Temperature indicator 14. Calibration indicator

3. CALibration indicator 9. pH buffer indicator 15. DO probe cell factor

4. pH indicator 10. Automatic Temperature

5. % saturation indicator 11. ERRor indicator 17. HOLD indicator

6. ppt indicator for input of

Salinity value.

7. Oxygen solubility indicator in mg/l or ppm.

Compensation indicator

12. Low battery indicator 18. READY indicator

13. Probe indicator

16. Function ON / OFF

indicator

2.2 Keypad

The large membrane keypad makes the instrument easy to use. Each button, when press ed, has a corresponding graphic indicator on the LCD. See Figure 1. Some buttons have several functions depending on its mode of operation.

Key Function

ON/OFF

HOLD

MODE

CAL/MEAS

ENTER

▲▲▲▲ / ▼▼▼▼

SETUP

Powers on and shuts off the meter. When you switch on the meter, the meter starts up in the mode that you last switched off from. For example, if you shut the meter off in mg/l measurement mode, the meter will be in mgl measurement mode when switched on.

Freezes the measured reading. To activate, press HOLD while in measurement mode. To release, press HOLD again.

NOTE: When auto endpoint feature is switched on, it automatically holds reading after 5 seconds of stability. The HOLD indicator appears on the display. Press HOLD to release Hold function.

1. Selects the measurement parameter. Press MODE to toggle between pH; DO % saturation; and DO mg/l.

2. While in CAL mode under pH or mg/l (or ppm) measurement status, this key will toggle between pH or mg/l (or ppm) calibration and temperature calibration (refer to Sections 4.6 in page 13).

Toggles between Calibration and Measurement mode.

1. If you were in pH measurement mode, press CAL/MEAS to enter pH calibration

mode.

2. If you were in DO % saturation measurement mode, press CAL/MEAS to enter

DO % saturation calibration mode.

3. If you were in DO mg/l (or ppm) measurement mode, press CAL/MEAS to enter

DO mg/l (or ppm) calibration mode.

4. To abort calibration, press CAL/MEAS key again to go back to measurement

mode.

While in advanced SETUP mode: Press CAL/MEAS to return to main menu from sub menus. Press CAL/MEAS again to return to return to measurement mode from main menu.

1. Press to confirm your calibration values in calibr atio n mo de.

2. While in SETUP, pressing ENTER key takes you through the various menu AND through each sub-menu.

In CALibration & SETUP mode:

In DO mg/l (or ppm) and temperature calibration mode, press up or down keys to increase or decrease the values.

In SETUP mode, press up or down keys to scroll through the setup subgroup programmes.

Within the SETUP sub-menu group, press up or down keys to change values. Takes you into the SETUP mode. This mode lets you customize meter preference and

defaults, view calibration and electrode data.

LIGHT. Press to activate backlit display.

3 PREPARATION

3.1 Inserting the Batteries

Four AAA batteries are included with your meter.

1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 3 below.

2. Remove battery cover to expose batteries.

3. Insert batteries. Follow the diagram inside the cover for correct polarit y.

4. Replace the battery cover into its original position using the two screws removed earlier.

Figure 3: Back panel of meter showing meter compartment

3.2 Probe Information

Your meter includes two probes:

• pH electrode with BNC connector.

• DO/temperature probe with a notched 6-pin connector

The temperature sensing element built into the DO probe will also compensate for pH readings as long as both probes are in your solution at the same time.

If you want to use a “3-in1” pH probe with a built-in temperature element, or if you want to use a separate temperature probe, you will need to disconnect the DO probe to allow for connection of the separate temperature sensor.

You can use any standard pH electrode with a BNC connector with this meter. DO probes, “3in-1” pH electrodes with a built-in temperature element, and temperature probes require a notched 6-pin connector (see Figure 4). For replacement probes, see the “Accessories” section on page 55.

NOTE: Keep connector dry and clean. Do not touch connector with soiled hands.

To connect the pH electrode:

1. Slide the BNC connector of the probe over the BNC connector socket on the meter. Make sure the slots of the connector are in line with the posts of the socket. Rotate and push the connector clockwise until it locks.

2. To remove electrode, push and rotate the connector anti-clockwise. While holding onto the metal part of the connector, pull it away from the meter.

See Figure 4. CAUTION: Do not pull on the probe cord or the probe wires might disconnect.

To connect the DO/temperature probe:

1. Line up the notch and 6 pins on the probe connector with the holes in the connector located on the top of the meter. Push down and screw the metal sleeve to lock the probe connector into place. See Figure 4.

2. To remove probe, unsc rew the metal sleeve and slide up the probe connector. While holding onto metal sleeve, pull probe away from the meter.

NOTE: Follow the same directions to connect an optional separate temperature element. CAUTION: Do not pull on the probe cord or the probe wires might disconnect.

Figure 4: Connecting pH and DO/temperature probes

4 CALIBRATION

4.1 Preparing the meter for calibration

Before starting calibration, make sure you are in the correct measurement mode. When you switch on the meter, the meter starts up in the measurement mode you shut it off in. For example, if you shut the meter off in pH measurement mode, the meter will come back into pH measurement mode when you switch the meter on.

4.2 pH Calibration

NOTE: We recommend that you perform at least 2-point calibration using standard

buffers that bracket (one above and one below) the expected sample range.

When you re-calibrate your meter, old calibration points are replaced on a “point-by-point” basis. For example:

• if you previously calibrated your met er at pH 4.01, 7.00, and 10.01, and you re-

calibrate at pH 7.00, the meter retains the old calibration data at pH 4.01 and pH

10.01.

Preparing for pH calibration

This meter is capable of up to 5-point pH calibration to ensure accuracy across the entire pH range of the meter. Select from the following buffer options:

• pH 1.68, 4.01, 7.00, 10.01 and 12.45.

The meter automatically recognizes and calibrates to these standard buffer values, which makes pH calibration faster and easier.

Be sure to remove the protective electrode storage bottle or rubber cap of the electrode before calibration or measurement. If the electrode has been stored dry, wet the electrode

in tap water for 10 minutes before calibrating or taking readings to saturate the pH elect rode surface and minimize drift.

Wash your electrode in deionized water after use, and store in electrode storage s olution. If storage solution is not available, use fresh pH 4.01 or 7.00 buffer solution.

Do not reuse buffer solutions after calibration. Contaminants in the solution can affect the calibration and eventually the accuracy of the measurements. See page 55 for information on our high-quality Eutech Instruments pH buffer soluti ons.

To Calibrate pH:

1. If necessary, press the MODE key to select pH mode. The pH indicator appears in the upper right hand corner of the display.

2. Rinse the probe thoroughly with de-ionized water or a rinse solution. Do not wipe the probe; t his causes a build-up of electrostatic charge on the glass surface.

3. Dip the probe into the calibration buffer. The end of the probe must be completely immersed into the sample. Stir the probe gently to create a homogeneous sample.

NOTE: The temperature element is in the DO

electrode. For temperature compensated readings, dip the DO electrode into the calibration buffer as well.

4. Press CAL/MEAS to enter pH calibration mode. The CAL indicator will be shown. The primary display will show the measured reading while the smaller secondary display will indicate the pH standard buffer solution.

5. Wait for the measured pH value to stabilize. See Figure 5.

Figure 5 - pH Calibration

6. Press ENTER to confirm calibration. The meter is now calibrated to the current buffer. The lower display scrolls through the remaining buffer options.

• If you are performing multi-point calibration,

go to step 7.

• If you are performing one-point calibration, go

to step 9.

7. Rinse the electrode with de-ionized water or in rinse solution, and place it in the next pH buffer.

8. Follow steps 5 to 8 for additional cali bration points. See Figure 6.

9. When calibration is complete, press CAL/MEAS to return to pH measurement mode.

NOTES: To exit from pH calibration mode without confirming calibration, DO NOT press ENTER in step 6. Press CAL/MEAS instead.

If the selected buffer value is not within ±1.0 pH from t he measured pH value: the electrode and buffer ic on blink and the ERR annunciator appears in the lower left corner of the display. Figure 7.

Figure 6 - Next point calibration for

pH 4.01

To limit the number of pH buffer values available during calibration, see SETUP section P3.2 on page 30.

Figure 7 - Err message and

electrode icon will appear if

incorrect buffer are used

4.3 Dissolved Oxygen Calibration

Before calibrating your m eter, make sure to rinse the probe well with de-ionized water.

NOTE: Do not let membrane surface of the probe touch any other surface. The probe guard (the piece with holes fitted over the end of the probe) protects the membrane; make sure this is always attached to the probe while it is in use. See Figure 8.

You can calibrate for dissolved oxygen in either % saturation or mg/l (ppm). All new calibrations

automatically override existing calibration data.

Before Calibration

Figure 8: DO Probe guard

Before starting calibration, make sure you are in the correct measurement mode. When you switch on the meter, the meter starts up in the units last used (either pH, mg/l (ppm) or % air saturation). For example, if you shut off the meter in “mg/l” units, the meter will read “mg/l” units when you switch the meter on.

NOTE: Most users will calibrate to 100% saturation even when working in mg/l. When calibrating the meter in mg/l mode, you can make fine adjustments, typically to a mid-range value between 10 and 100%. If you are calibrating to a mid-range value, you need to set the 100% saturation value first.

4.4 Dissolved Oxygen Calibration in % Saturation

You can calibrate this meter quickly and easily in air. The exact calibration value depends on barometric pressure. The meter is set to a factory default of 760 mm Hg, which results in a calibration value of 100% saturation in air.

NOTE: If the barometric pressure setting has been changed from 760 mm Hg, the

calibration value in air will automatically adjust to a value other than 100%. The adjusted value will be correct for the new barometric pressure setting.

See page 33 to change the pressure setting. See Addendum 2 on page 57 for a table of adjusted % saturation values.

To calibrate 100% Saturation:

1. Rinse the probe well with deionized rinse water. For best

accuracy, wrap the end of the probe in a damp cloth. Do not touch the membrane.

2. Press the MODE key to select the % saturation mode.

3. Press the CAL key. The CAL indicator will appear above the

primary display. The primary display shows the current value of the measurement and the secondary display will show

100.0. See figure 9.

4. Hold the probe in the air. Wait for the reading to stabilize. If

the READY indicator feature is enabled, it will appear when the reading is stable.

5. Press the ENTER key. The meter automatically c alibrates t o

100.0% air saturation and returns to Measurement mode.

6. See Figure 9

NOTES:

Whenever an error occurs during calibration, the ERR indicator appears in the lower left hand corner of the display.

You can offset your % DO calibration. See page 36 for directions.

Figure 9: To calibrate for

100% saturation

4.5 Dissolved Oxygen Calibration in mg/l (ppm) mode

Calibrating the meter to 100% in saturation mode will also calibrate the mg/l mode at the value in mg/l corresponding to 100% saturation. This should produce acceptable results in most applications.

This meter also lets you make a calibration adjustment in mg/l (ppm) mode without affecting your % saturation calibration.

To select between mg/l and ppm units, see page 42.

To calibrate in mg/l (ppm) mode:

1. Calibrate 100% saturation as per Section 4.4.

2. Rins es the probe well with deionized rinse water. Wipe the

outside of the probe carefully (do not touch the membrane).

3. Dip the probe into a sample of known oxygen

concentration. Wait for the reading to stabilize. If the READY indicator feature is enabled, it will appear when the reading is stable.

4. Press the MODE key to select the mg/l (ppm) mode.

5. P ress the CAL key. The CAL indicator will appear above

the primary display. The primary display shows the current value of the measurement and the secondary display shows the temperature.

6. Press the ▲ and ▼ keys to adjust the reading.

7. Press the ENTER key. The meter automatical ly calibrates

to the value you entered and returns to Measurement mode.

NOTES ON MG/L (PP M) MODE CALIBRA TION

• During mg/l (ppm) measurement and calibration, the

meter adjusts to the barometric pressure value that is programmed into the meter. It also adjusts to the salinity value that is programmed into the meter.

• You can change the barometric pressure value and

salinity value in the mg/l (ppm) SETUP mode (see Section 7.6 on page 33 - 34 for directions).

Figure 10: To calibrate in

mg/l (ppm) mode

(The values shown above

are for illustration purpose.

Your meter may display

different values depending

on the settings & your

environmental conditions)

• Whenever an error occurs during calibration, t he ERR

indicator appears in the lower left hand corner of t he display.

4.6 Temperature Calibration

The built-in temperature sensor included in the probe is factory calibrated. Calibrate your s ensor only if you suspect temperature errors that may have occurred over a long period of time or if you have a replacement probe.

1. S witch the meter on. Press MODE to select either pH or

mg/l (ppm) measurement mode.

2. Press the CAL/MEAS key to enter pH or mg/l (ppm)

calibration mode. The CAL indicator will appear above the primary display.

3. While in pH or mg/l (ppm) calibration mode, press the

MODE key to enter temperature calibration mode. The primary display shows the temperature reading and the secondary display shows you the factory default temperature value.

4. Compare the primary display reading to a NIST-traceable

thermometer or another thermometer known to be accurate.

5. Press the ▲ or ▼ keys to adjust the primary display

reading to agree with your temperature standard.

6. Press the ENTER key to confirm temperature calibrat ion

and return to Measurement mode.

NOTES:

• To exit from Temperature Calibration mode without

confirming calibration, DO NOT press ENTER in Step

6. Press CAL/MEAS instead.

• If a separate temperature probe is used for pH

measurement (EC-PHWPTEMP-01W), then temperature calibration done for pH is separate and independent from mg/l measurement mode.

• Temperature calibration is restrict ed to ± 5°C from the

factory default value displayed during calibration (shown in the secondary display).

(The values shown above are for illustration purpose. Your meter may display different values depending on the settings & your environmental conditions)

Figure 11: Temperature

calibration

5 MEASUREMENT

5.1 Taking pH Measurements

5.1.1 Automatic Temperature

Compensation

Automatic Temperature Compensation only occurs when a temperature sensing element is plugged into the meter.

Temperature sensing element refers to the following probes made specifically for this meter: :

• The DO electrode (EC-DOHANDY) with a built-

in temperature sensor;

• Temperature probe, EC-PHWPTEMP-01W; or

• The “3-in-1” pH/T em perature combination electrode, EC-FE73528-01W.

If there is no temperature sensor plugged into the meter, the default manual temperature setting is 25 °C. You can manually set the temperat ure to match your working conditions

using a separate thermometer. For automatic temperature compensation (ATC) simply plug the temperature probe into the

meter (see page 6 for directions). The ATC indicator will light up on the LCD. See figure 12.

Figure 12 - ATC annunciator will

light up when connected to

temperature probe

NOTE: The temperature sensing element must be submersed in the

liquid you are measuring.

5.1.2 Manual Temperature Compensation (pH)

IMPORTANT: For manual compensation, you must disconnect the temperature probe (see page 6).

1. Switch the meter on. Press the MODE key to select pH mode.

2. Press the CAL/MEAS key to enter pH calibration mode. The CAL indicator will appear above the primary display.

3. While in pH calibration mode, press the MODE key to enter temperature calibration mode. The primary display shows the current temperature setting and the secondary display shows the default value 25 °C.

4. Check the temperat ure of your sample using an accurate thermometer.

5. Press the ▲▲▲▲ or ▼▼▼▼ keys to set the temperature to the measured value from step 4.

6. Press ENTER to confirm the selected temperature and to return to the pH measurement mode.

See Figure 13. The meter will now compensate pH readings for the

manually set temperature.

Figure 13 - Manual temperature

compensation

NOTES:

• To exit this program without confirming the manual temperature compensation

value, DO NOT press ENTER in step 6. Press CAL/MEAS instead.

5.1.3 Taking Measurements (pH)

Be sure to remove the electrode soaker bottle or protective rubber cap on the electrode before taking measurements.

To take readings:

1. Rinse the pH electrode with de-ionized or distilled water before use to remove any impurities adhering to the probe body. If the pH electrode has dehydrated, soak it for 30 minutes in Eutech Instruments el ectrode storage solution or 2M – 4M KCl solution (sold separately).

2. Press ON to switch on meter.

3. Press the MODE key to sel ect pH m easurement mode. The MEAS annunci ator appears on the top center of the LCD. The ATC indicator appears in the lower right-hand c orner to indicator Automatic Temperature Compensation.

NOTE: For pH manual temperature compensation, you must disconnect the DO electrode from the 6-pin connector. The ATC indicator will disappear from the display. You also need to set a manual tem perature compensation value. See page 15 (Figure

13) to set Manual Temperature Compensation.

4. Dip t he probe into the sample. Since the DO electrode contains the temperat ure sensor, make sure it is also immersed in your solution.

Figure 14 - Measurement mode

When dipping the probe into the sample, the sensor or the glass bulb of the electrode must be completely immersed into the sample. Stir the probe gently in the sample to create a homogeneous sample.

5. Allow time for the reading to stabilize. Note the reading on the display. Note the reading on the display. If the Ready indicator is selected on, it will appear when the reading is stable. See below for more information.

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