EUTECH INSTRUMENTS WATERPROOF CYBERSCAN PD 300 PHDISSOLVED OXYGEN... User manual

Instruction Manual
CyberScan PD 300
Waterproof Hand-held pH/Dissolved Oxygen/Temperature Meter
68X248910 Technolo
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05/2000 ver 1

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 Eutech
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.
Copyright © May 2000 Eutech Instruments Pte Ltd. All rights reserved.

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 configuration 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
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 (EC-
FE72522-05B), 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
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
2.
Figure 2: Full LCD Screen
1. SETUP mode indicator 7. Oxygen solubility indicator in
mg/l or ppm. 13. Probe 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
Compensation indicator 16. Function ON / OFF indicator
5. % saturation indicator 11. ERRor indicator 17. HOLD indicator
6. ppt indicator for input of
Salinity value. 12. Low battery indicator 18. READY indicator

3
2.2 Keypad
The large membrane keypad makes the instrument easy to use. Each button, when pressed,
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 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.
HOLD 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.
MODE 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).
CAL/MEAS 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.
ENTER 1. Press to confirm your calibration values in calibration mode.
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.
SETUP 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.

4
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 polarity.
4. Replace the battery cover into its original position using the two screws removed earlier.
Figure 3: Back panel of meter showing meter compartment

5
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, “3-
in-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.

6
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, unscrew 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

7
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 meter 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 electrode
surface and minimize drift.
Wash your electrode in deionized water after use, and store in electrode storage solution. 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 solutions.

8
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; this
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

9
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 calibration 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 the
measured pH value: the electrode and buffer icon blink
and the ERR annunciator appears in the lower left
corner of the display. Figure 7.
To limit the number of pH buffer values available during
calibration, see SETUP section P3.2 on page 30.
Figure 6 - Next point calibration for
pH 4.01
Figure 7 - Err message and
electrode icon will appear if
incorrect buffer are used

10
4.3 Dissolved Oxygen Calibration
Before calibrating your meter, 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
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.
Figure 8: DO Probe guard

11
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 calibrates to
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

12
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. Rinses 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. 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
shows the temperature.
6. Press the ▲and ▼keys to adjust the reading.
7. Press the ENTER key. The meter automatically calibrates
to the value you entered and returns to Measurement
mode.
NOTES ON MG/L (PPM) MODE CALIBRATION
•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)

13
•Whenever an error occurs during calibration, the ERR
indicator appears in the lower left hand corner of the
display.
4.6 Temperature Calibration
The built-in temperature sensor included in the probe is
factory calibrated. Calibrate your sensor only if you suspect
temperature errors that may have occurred over a long
period of time or if you have a replacement probe.
1. Switch 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 calibration
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 restricted 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

14
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/Temperature 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 temperature 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.
NOTE: The temperature sensing element must be submersed in the
liquid you are measuring.
Figure 12 - ATC annunciator will
light up when connected to
temperature probe

15
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 temperature 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.
NOTES:
•To exit this program without confirming the manual temperature compensation
value, DO NOT press ENTER in step 6. Press CAL/MEAS instead.
Figure 13 - Manual temperature
compensation

16
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 electrode storage solution
or 2M – 4M KCl solution (sold separately).
2. Press ON to switch on meter.
3. Press the MODE key to select pH measurement mode. The MEAS annunciator appears
on the top center of the LCD. The ATC indicator appears in the lower right-hand corner 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 temperature compensation value. See page 15 (Figure
13) to set Manual Temperature Compensation.
4. Dip the probe into the sample. Since the DO electrode contains the temperature sensor,
make sure it is also immersed in your solution.
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.
Figure 14 - Measurement mode