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Oakton PD 300 Instruction Manual

Waterproof hand-held ph/dissolved oxygen/temperature meter
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Instruction Manual
PD 300
Waterproof Hand-held pH/Dissolved Oxygen/Temperature Meter
68X248910
Technology Made Easy ...
Rev.3 JUN 06

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  • Page 1 Instruction Manual PD 300 Waterproof Hand-held pH/Dissolved Oxygen/Temperature Meter 68X248910 Technology Made Easy ... Rev.3 JUN 06...
  • Page 3 This instruction manual is written to cover as many anticipated applications of the meter as possible. If there are doubts in the use of the PD 300 meter, do not hesitate to contact the nearest Authorised Distributor. Eutech Instruments/ Oakton Instruments cannot accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION DISPLAY AND KEYPAD FUNCTIONS Display Keypad PREPARATION Inserting the Batteries Probe Information CALIBRATION Important Information on Meter Calibration Temperature Calibration pH calibration Dissolved Oxygen Calibration Dissolved Oxygen Calibration in % Saturation Dissolved Oxygen Calibration in mg/L (ppm) mode MEASUREMENT Taking pH Measurements Taking DO readings...
  • Page 5 ADDENDUM 3: METER FACTORY DEFAULT SETTINGS WARRANTY RETURN OF ITEMS...

  • Page 6: Introduction

    PD 300 INTRODUCTION Thank you for selecting the PD 300 waterproof portable meter. This meter is a microprocessor-based instrument that is designed to allow one-hand operation. It is capable of measuring pH, Dissolved Oxygen (mg/L or % Saturation of Oxygen) and Temperature. It is...

  • Page 7: Display And Keypad Functions

    Instruction Manual PD 300 DISPLAY AND KEYPAD FUNCTIONS Display The LCD has a primary and secondary display. • The primary display shows the measured pH or DO value (either in mg/L, ppm or %, depending on units of measurement selected).

  • Page 8: Keypad

    Instruction Manual PD 300 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.

  • Page 9: Preparation

    Instruction Manual PD 300 PREPARATION Inserting the Batteries Four AAA batteries are included with your meter. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 3 below. Remove battery cover to expose batteries. Insert batteries. Follow the diagram inside the cover for correct polarity.

  • Page 10: Probe Information

    Instruction Manual PD 300 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.
  • Page 11 Instruction Manual PD 300 To connect the DO/ temperature probe: 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 turn the metal locking ring clockwise to lock the probe connector into place.

  • Page 12: Calibration

    Instruction Manual PD 300 CALIBRATION Important Information on Meter Calibration When you recalibrate your meter, old calibration points are replaced on a “point by point” basis in pH and completely for % saturation and mg/L (ppm). For example: • pH: if you previously calibrated your meter at pH 4.01, 7.00 and 10.01, and you recalibrate at pH 7.00, the meter retains the old calibration data at pH 4.01 and pH 10.01.

  • Page 13: Temperature Calibration

    Instruction Manual PD 300 Temperature Calibration The temperature sensor of the the DO 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. Make sure the DO probe is attached prior to performing the calibration.

  • Page 14: Ph Calibration

    Instruction Manual PD 300 pH calibration Before starting calibration, make sure you are in pH measurement mode. NOTE We recommend calibration with at least two calibration standards that bracket (one above and one below) the expected sample range. One point calibration is possible as long as the chosen buffer is close to the expected sample value.
  • Page 15 Instruction Manual PD 300 To Calibrate pH: If necessary, press the MODE key to select pH mode. The pH indicator appears in the upper right hand corner of the display. Rinse the probe thoroughly with de-ionised water or a rinse solution. Do not wipe the probe;...
  • Page 16 Instruction Manual PD 300 Rinse the electrode with deionised water or in rinse solution, and place it in the next pH buffer. Follow steps 5 to 8 for additional calibration points. See Figure 7. When calibration complete, press CAL/MEAS to return to pH measurement mode.

  • Page 17: Dissolved Oxygen Calibration

    Instruction Manual PD 300 Dissolved Oxygen Calibration Before calibrating your meter, make sure to rinse the probe well with de-ionised water or rinse solution. 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;...

  • Page 18: Dissolved Oxygen Calibration In % Saturation

    Instruction Manual PD 300 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.
  • Page 19 Instruction Manual PD 300 To calibrate 0% Saturation: MEAS Rinse the probe well with deionised rinse water. Do not 1 2 8 . 5 READY touch the membrane. 2 3 . 4 °C Press the MODE key to select the % saturation mode.

  • Page 20: Dissolved Oxygen Calibration In Mg/L (Ppm) Mode

    Instruction Manual PD 300 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.
  • Page 21 Instruction Manual PD 300 To calibrate in mg/L (ppm) mode: 1. Calibrate 100% saturation as per Section 4.5. 2. Rinses the probe well with deionised 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.

  • Page 22: Measurement

    Instruction Manual PD 300 MEASUREMENT Taking pH Measurements 5.1.1 Automatic Temperature Compensation Automatic Temperature Compensation only occurs when a compatible temperature sensing element is plugged into the meter. If there is no temperature sensor plugged into the meter, the default manual temperature setting is 25 °C.
  • Page 23 Instruction Manual PD 300 Manual Temperature Compensation (pH only) IMPORTANT: For manual compensation, you must disconnect the temperature probe (see page 10). Switch the meter on. Press the MODE key to select pH mode. Press the CAL/MEAS key to enter pH calibration mode.
  • Page 24 Instruction Manual PD 300 Taking Measurements (pH) Be sure to remove the electrode storage bottle or protective rubber cap on the electrode before taking measurements. To ensure Automatic Temperature Compensation (ATC) for pH measurements, the DO or ATC probe must be plugged in and immersed into the sample.
  • Page 25 Instruction Manual PD 300 Taking measurements with READY indicator selected on If the READY indicator has been activated, the READY annunciator lights when the reading is stable*. Switch the READY indicator on or off in SETUP Section 8.4 Program P3.1.

  • Page 26: Taking Do Readings

    Instruction Manual PD 300 Taking DO readings During measurement, the probe can be: Fully immersed in the solution Partially immersed in the solution Do not allow the probe’s membrane surface to touch anything! The probe guard (the piece with holes fitted over the end of the probe) protects the membrane;...
  • Page 27 Instruction Manual PD 300 Taking measurements with READY ON indicator selected on If the READY indicator has been activated, the READY annunciator lights when the reading is stable. To switch the READY indicator on or off in the SETUP program – see Section 8.10.1 on page 45 for directions.

  • Page 28: Taking Pressure/Salinity Compensated Do Measurements

    Instruction Manual PD 300 Taking Pressure/Salinity Compensated DO measurements If necessary, you can adjust the pressure and salinity values of your measurements in the SETUP mode. The DO meter will automatically compensate for salinity and pressure based on the values entered in the SETUP functions. The meter is factory set at 760 mm Hg (101.3 Pascals) pressure adjustment and a factor of 0.0 ppt salinity adjustment.

  • Page 29: Hold Function

    Instruction Manual PD 300 HOLD FUNCTION This feature lets you freeze the pH, dissolved oxygen, and temperature readings for a delayed observation. HOLD can be used any time when in MEAS mode. To hold a measurement, press the HOLD key while in measurement mode.

  • Page 30: Backlit Lcd

    Instruction Manual PD 300 BACKLIT LCD Using the backlit LCD This feature lets you view readings in low light situations. To activate the backlit LCD feature, press the key to activate. To conserve batteries, the backlight automatically shuts off after 20 seconds. To keep the LCD backlit, keep the backlight key pressed.

  • Page 31: Advanced Setup Functions

    Instruction Manual PD 300 ADVANCED SETUP FUNCTIONS The advanced SETUP mode lets you customise your meter’s preferences and defaults. Your waterproof meter features different sub groups that organise all set-up parameters. Each measurement parameter (pH, % saturation, & mg/L) has its own sets of customisable setup functions.
  • Page 32 Instruction Manual PD 300 SETUP in pH Measurement Mode P1.0: View previous calibration data P1.1 First calibration point (pH 1.68) P1.2 Second calibration point (pH 4.01) P1.3 Third calibration point (pH 7.00) P1.4 Fourth calibration point (pH 10.01) P1.5 Fifth calibration point (pH 12.45) Instructions on page 30.
  • Page 33 Instruction Manual PD 300 % Saturation Measurement Mode dPr: Dissolved Oxygen parameters • Select Hg or Pa barometeric pressure units • Select barometric pressure Instructions on page 37. OFS: % saturation offset adjustment • Set % saturation offset adjustment Instructions on page 40.
  • Page 34 Instruction Manual PD 300 mg/L (ppm) Measurement Mode dPr: Dissolved Oxygen parameters • Select Hg or Pa barometric pressure units • Select barometric pressure • Select salinity adjustment factor Instructions on page 37. CAL: Viewing previous calibration data • View previous calibration data Instructions on page 41.

  • Page 35: P1.0: Viewing Previous Ph Calibration Data

    Instruction Manual PD 300 P1.0: Viewing previous pH calibration data This mode lets you recall previous pH calibration data, which helps you know when to re-calibrate your meter. This is a “view only” mode. From measurement mode: Press the MODE key to select pH measurement mode if necessary.

  • Page 36: P2.0: Viewing Ph Electrode Data

    Instruction Manual PD 300 P2.0: Viewing pH electrode data Program 2 has two “view only” options that let you check electrode parameters diagnostic purposes. It lets you view: • P2.1 = Electrode offset • P2.2 = Electrode slope From pH measurement mode Press the MODE key to select pH measurement mode.

  • Page 37: P3.0: Ph Measurement Configuration

    Instruction Manual PD 300 P3.0: pH Measurement configuration This subgroup program allows to customise the meter to your specific needs. You can program the meter to: Select READY indicator ON or OFF Select the number of pH calibration points Select between °C and °F units for temperature...
  • Page 38 Instruction Manual PD 300 P3.1: READY Indicator and auto endpoint function This program lets you select: • “READY indicator on” to indicate when the reading is stable. • “READY indicator off” for faster meter response. • Auto endpoint function on. Select auto endpoint on to “hold”...
  • Page 39 Instruction Manual PD 300 P3.2: Selecting number of pH calibration points Program P3.2 lets you select the number of calibration points that appear in pH calibration mode: 2, 3, 4, or 5. The meter will automatically exit calibration mode after you have calibrated to your selected number of points.
  • Page 40 Instruction Manual PD 300 P3.3 Selecting °C or °F This meter lets you select between °C and °F units for temperature readings. From measurement mode Press the MODE key to select pH measurement mode. Press SETUP key to enter Set Up mode.

  • Page 41: P4.0: Resetting To Factory Default Settings (Ph)

    Instruction Manual PD 300 P4.0: Resetting to factory default settings (pH) This program lets you reset all pH parameters to factory default settings. This clears all calibration data and any other pH setup functions you might have changed. The following settings will remain as you have set them: •...

  • Page 42: P1.0 (Dpr): Dissolved Oxygen Parameters

    Instruction Manual PD 300 P1.0 (dPr): Dissolved Oxygen Parameters This sub group is available in % saturation and mg/L (ppm) mode and lets you adjust the barometric pressure and salinity (% saturation mode only). 8.6.1 P1.1 Pressure adjustment mode Barometric pressure is vital to correct dissolved oxygen measurements. You need to enter the correct barometric pressure of the area you are measuring.
  • Page 43 Instruction Manual PD 300 Figure 28: Change pressure units (mm Hg or kPa) & adjusting its values 8.6.2...
  • Page 44 Instruction Manual PD 300 P1.2: Salinity Adjustment Mode NOTE This mode appears in mg/L (ppm) measurement mode only. Salinity correction mode lets you correct for the variations in oxygen solubility due to salt concentration in the sample. From measurement mode: Press the MODE key to select mg/L (ppm) mode.

  • Page 45: P2.0 (Ofs): Offset For % Saturation Measurement

    Instruction Manual PD 300 P2.0 (OFS): Offset for % Saturation Measurement NOTE This sub group appears in % saturation measurement mode only. From measurement mode: Press the MODE key to select % saturation mode. Press the SETUP key to enter SETUP mode.

  • Page 46: P3.0 [P2.0] (Cal): Previous Calibration Information (*Program Numbers In "[ ]" Are For Setup In Mg/L (Ppm) Mode

    Instruction Manual PD 300 P3.0 [P2.0] (CAL): Previous Calibration Information (*Program numbers in “[ ]” are for setup in mg/L (ppm) mode. This sub group shows you the previous calibration data. This is a “view only” parameter. In % saturation mode: Calibration information is shown in % saturation units.

  • Page 47: P4.0 [P3.0] (Ele): Electrode Properties

    Instruction Manual PD 300 P4.0 [P3.0] (ELE): Electrode Properties These “view only” parameters show you the electrode properties for diagnostic purposes: P4.1 [P3.1] Probe Slope: Provides an indication of the probe’s efficiency. The value displayed is the ratio of the theoretical value to the actual value produced by the probe.
  • Page 48 Instruction Manual PD 300 Press the ENTER key. The upper display shows the 100% saturation mV value. Press the ENTER key. The upper display shows the 0% saturation mV value. Press the ENTER key to move back to subgroup “ELE”.

  • Page 49: P5.0 [P4.0] Cof: Unit Configuration

    Instruction Manual PD 300 8.10 P5.0 [P4.0] COF: Unit Configuration Unit configuration mode lets you select the following parameters: P5.1 [P4.1] READY indicator and auto endpoint function. [P4.2] mg/L or ppm units (available in mg/L or ppm mode only) P5.2 [P4.3] Temperature in °C or °F.
  • Page 50 Instruction Manual PD 300 P5.1 [P4.1] READY Indicator and Auto Endpoint Function The first program lets you select: • “READY indicator ON” to indicate when the reading is stable. • “READY indicator OFF” for faster meter response. • Auto Endpoint Function ON. Select auto endpoint ON to “HOLD”...
  • Page 51 Instruction Manual PD 300 8.10.2 [P4.2] Selecting mg/L or ppm units NOTE This mode appears in mg/L (ppm) measurement mode only. This mode lets you select between mg/L or ppm dissolved oxygen units. From measurement mode Press the MODE key to select mg/L (ppm) mode.
  • Page 52 Instruction Manual PD 300 8.10.3 P5.2 [P4.3] Selecting °C or °F Temperature Unit This meter lets you select between °C and °F units for temperature readings. From measurement mode Press SETUP key to enter SETUP mode. Press ▲ or ▼ keys to scroll through subgroups until you view parameter “COF”...

  • Page 53: P6.0 [P5.0] Lcd: Adjusting Lcd Brightness

    Instruction Manual PD 300 8.11 P6.0 [P5.0] LCd: Adjusting LCD Brightness NOTE This function is only available through DO measurement mode (% saturation or mg/L) This mode lets you adjust the brightness of the backlit LCD. Selecting a dimmer back-lighting level helps conserve batteries.

  • Page 54: P7.0 [6.0] Rst: Resetting To Factory Default Setting (Do)

    Instruction Manual PD 300 8.12 P7.0 [6.0] rSt: Resetting to Factory Default Setting (DO) This program lets you reset all DO (% saturation and mg/L) parameters to factory default settings. This clears all calibration data and any other DO setup functions you might have changed.

  • Page 55: Probe Care And Maintenance

    Instruction Manual PD 300 PROBE CARE AND MAINTENANCE pH Electrode care Your pH electrode should be kept clean and free from dirt and contamination. Probes that are not clean may provide slow or unusual readings. With proper care and normal usage, the pH electrode will need to be replaced every 6 to 18 months on average.
  • Page 56 Instruction Manual PD 300 Reactivating the pH electrode If stored and cleaned properly, your pH electrode should be ready for immediate use. However, a dehydrated bulb may cause sluggish response. To rehydrate the bulb, immerse the electrode in a pH 4 buffer solution for 10 to 30 minutes. If this fails, the electrode requires activation.

  • Page 57: Dissolved Oxygen Principle

    Instruction Manual PD 300 Dissolved Oxygen Principle The probe is a galvanic measuring element which produces an output proportional to the oxygen present in the medium in which it is placed. The galvanic probe design lets you take measurements immediately – without the typical 15 minute wait of other dissolved oxygen probes.

  • Page 58: Probe Care And Maintenance

    Instruction Manual PD 300 Probe Care and Maintenance Under typical operating conditions, the DO probe should last for several years. Proper care and maintenance will help you receive the maximum probe life and ensure more accurate readings. Since any deposits on the membrane surface act as a barrier to oxygen diffusing through the membrane, the membrane must be cleaned at regular intervals to assure maximum reliability.

  • Page 59: Membrane Housing Replacement

    Instruction Manual PD 300 Membrane Housing Replacement Replacement of the membrane cap housing/membrane is required only when you cannot calibrate the probe, or if the membrane is damaged. Typical membrane damages are punctures or wrinkles caused during measurements or cleaning. For more information see Trouble-Shooting Guide section on page 60.

  • Page 60: Membrane/O-Ring Replacement (Optional Procedure)

    Instruction Manual PD 300 Membrane/O-ring Replacement (Optional Procedure) It is recommended only experienced service personnel can perform this procedure. This procedure is OPTIONAL, and should only be performed if you have new membrane and O-ring. You are also required to have a membrane installation tool. These items are available as optional accessories in the Accessories section.
  • Page 61 Instruction Manual PD 300 10. Using the installation tool, screw the membrane lock back into the cap. Tighten the lock firmly over Installation tool the membrane and O-ring, but do not over tighten. Open Close 11. Inspect the membrane for wrinkles. If wrinkles exist, remove the membrane and repeat steps 8 –...

  • Page 62: Electrolyte Solution

    Instruction Manual PD 300 Electrolyte Solution The electrolyte solution in your probe’s cap will deplete on usage and will need to be replaced periodically. Your new DO probe comes with accessories of one 50-ml replacement electrolyte solution and a spare membrane cap. The replacement electrolyte comes premixed and ready to use. To...

  • Page 63: Do Probe Troubleshooting Table

    Instruction Manual PD 300 DO Probe Troubleshooting Table When experiencing difficulties with the equipment, keep in mind of the following: Check for the obvious, such as physical condition of the probe, any signs of damage to the cable, power and signal connections etc.
  • Page 64 Instruction Manual PD 300 Problem Probable Causes Solution It is not possible to Probe has dried out – no Service probe and change calibrate the probe in electrolyte inside. membrane. Use a stiff nylon brush to air – the display will...

  • Page 65: Trouble Shooting Guide

    Instruction Manual PD 300 10 TROUBLE SHOOTING GUIDE Problem Cause Solution Press ‘ON’ key but no Batteries not in place Check that batteries are in place display and making good contact. Batteries not in correct polarity Re-insert batteries with correct (+ and –...

  • Page 66: Error Messages

    Instruction Manual PD 300 11 ERROR MESSAGES LCD Display Indicates Cause Solution Err annunciator Unrecognised input Wrong input in selected Release key. Select valid from keypad mode. operations depending on mode. CAL & Err Calibration error. Wrong value input at...

  • Page 67: Specifications

    Instruction Manual PD 300 12 SPECIFICATIONS Range -2.00 to 16.00 pH Resolution 0.01 pH Relative accuracy ±0.01 pH Range 0.00 – 20.00 mg/L or ppm Dissolved Oxygen Resolution 0.01 mg/L; 0.01 ppm Relative accuracy ± 1.5% of Full Scale Range 0.0 –...

  • Page 68: Accessories

    Eutech Instruments Item Eutech Instruments Ordering Code Waterproof CyberScan PD 300 portable pH/DO meter (with backlit) – with pH EC-PDWP300/03K electrode (EC-DA93506-03B), DO probe with built-in temperature sensor (EC- DOHANDYNEW, 1 assembled membrane cap housing, 50-ml refilling electrolyte & hard plastic carrying case with pH calibration solutions (EC- PHWP-KIT).
  • Page 69 Replacement membranes, pack of 5 35640-74 Replacement membranes, pack of 25 35640-75 Hard carrying case 35632-98 Temperature probe for pH or temperature only reading with PD 300 meter. 35618-05 Note: DO reading is not possible when this probe is used.
  • Page 70 Instruction Manual PD 300 Calibration Solutions Item Eutech Instruments Oakton Instruments Order Code Order Code pH 4.01 buffer solution, 480 ml bottle (1 pint) EC-BU-4BT 00654-00 pH 7.00 buffer solution, 480 ml bottle (1 pint) EC-BU-7BT 00654-04 pH 10.01 buffer solution, 480 ml bottle (1 pint)

  • Page 71: Addendum 1: Dissolved Oxygen & Meter Theory

    Instruction Manual PD 300 14 ADDENDUM 1: DISSOLVED OXYGEN & METER THEORY Dissolved Oxygen (DO) refers to the volume of oxygen that is contained in water. There are two main sources of DO in water: from atmosphere and photosynthesis. Waves and tumbling water mix air into the water where oxygen readily dissolves until saturation occurs.

  • Page 72: Addendum 2: Pressure Vs Altitude Table

    Instruction Manual PD 300 15 ADDENDUM 2: PRESSURE VS ALTITUDE TABLE Barometric pressure affects DO readings, therefore this meter lets you enter the correct barometric pressure at your altitude. If you do not have equipment that lets you measure the exact barometric pressure at your altitude, you can estimate it using the chart below.
  • Page 73 Instruction Manual PD 300 16 ADDENDUM 3: METER FACTORY DEFAULT SETTINGS Resetting the meter to factory default settings clears all calibration data and most other setup functions you might have changed. The following settings will remain as you have set them: •...
  • Page 74 If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return – freight pre-paid – and correction will be made without charge. Eutech Instruments/ Oakton Instruments will determine if the product problem is due to deviations or customer misuse.
  • Page 75 A restocking charge will be made on all unauthorised returns. NOTE: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make improvements in design, construction, and appearance of products without notice.
  • Page 76 For more information on Eutech Instruments/ Oakton Instruments’ products, contact your nearest distributor or visit our website listed below: Oakton Instruments Eutech Instruments Pte Ltd. Distributed by: P.O Box 5136, Blk 55, Ayer Rajah Crescent, Vernon Hills, IL 60061, USA...

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