Eutech instruments pHTestr10, pHTestr20, pHTestr30, pHTestr10BNC, pHSpear User Manual

This Instruction Manual is also available for download on our Web-site: eutechinst.com or 4oakton.com

INSTRUCTION MANUAL

pHTestr 10, 20, 30, 10BNC, Spear

Large Screen

Waterproof pH / Temperature Tester

Double Junction

Introduction

Thank you for selecting our microprocessor waterproof pH tester with USA or NIST buffer set selection. You have one of five models:

• pHTestr10

• pHTestr20

• pHTestr30

• pHTestr10BNC

• pHSpear This manual provides a step-by-step guide to operate the testers.

Before you begin:

Condition your pHTestr 10, 20, 30 electrodes by immersing it in electrode storage solution or tap water for at least 30 minutes before use. DO NOT use de-ionized water.

Ensure that your pHSpear electrode is always soaked in the electrode storage solution or tap water via its protective cap.

Note: For pHTestr10BNC, please refer to the pH electrode’s instruction manual.

pH Buffer Set Selection

Your tester features USA (pH 4.01, pH 7.00 and pH 10.01) or NIST (pH 4.01, pH 6.86, and pH 9.18) standards. Select either one to suit your requirements.

1. While pressing the HOLD/ENT button, switch on the tester by pressing the ON/OFF button.

2. Release the HOLD/ENT button. The display will flash either USA or NIST.

3. Press CAL button to toggle between the two buffer set standards.

4. Press the HOLD/ENT button to confirm the selection of the buffer set.

With meter powered off, press HOLD/ENT and ON/OFF at the same time. First release ON/OFF button, then HOLD/ENT button.

Figure 1: Buffer Selection Sequence

After buffer selection, whole LCD segment lits up and goes back to measureme nt mode.

pH Calibration

Calibration should be done regularly, preferably once a week. You can calibrate up to three points using either the USA or the NIST buffer set standards.

1. Press ON/OFF button to switch unit on.

2. Dip electrode about 2 to 3 cm into the pH standard buffer solution.

3. Press the CAL button to enter calibration mode. The ‘CAL’ indicator will be shown. The upper display will show the measured reading based on the last calibration while the lower display will indicate the pH standard buffer solution.

Note: All testers have dual display during calibration mode Note: To abort calibration, press the ‘CAL’ button.

4. Allow about 2 minutes for the tester reading to stabilize before pressing the HOLD/ENT button to confirm the first calibration point. The upper display will be calibrated to the pH standard buffer solution and the lower display will then be toggling in between readings of the next pH standard buffer solution.

5. Repeat with other buffers if necessary. Rinse electrode in tap water before dipping into next buffer.

Note: The calibration mode allows you to perform up to three calibration points before returning to the measurement mode automatically. However, if you opted to have only one or two calibration points, simply skip the remaining calibration points by exiting to the measurement mode by pressing the CAL button.

To do a 1 point calibration only, press CAL button at this point to exit to the measurement mode. Otherwise, proceed to second buffer for a second buffer for a second point calibration.

To do a 2 point calibration only, press CAL button at this point to exit to the measurement mode. Otherwise, proceed to third buffer for a third buffer for a third point calibration.

After the third point calibration, the meter will automatically return to the measurement mode. At any point, an error message ‘Er. 1’ will be displayed momentarily if the confirmed pH value is not within the pH calibration window.

Figure 2: Example of pH Calibration Sequence

pH Measurement

1. Press the ON/OFF button to switch the tester on.

2. Dip the electrode about 2 to 3 cm into the test solution. Stir and let the reading stabilize. For pHSpear, pierce the penetrating tip electrode through your semi solid sample as per the desired depth. Rotate left and right several times and tilt to ensure sample contact.

3. Note the pH value or press HOLD/ENT button to freeze the reading. To release the reading, press HOLD/ENT again.

4. Press ON/OFF to turn off tester. If you do not press a button for 8.5 minutes, the tester will automatically shut off to conser ve batteries.

HOLD Function

This feature lets you freeze the display for a delayed observation

1. Press HOLD/ENT button to freeze the measurement. A ‘HOLD’ indicator will be displayed and the measurement will be frozen.

2. Press HOLD/ENT again to release the measurement. The ‘HOLD’ indicator will not be displayed anymore indicating the held measurement is released.

Figure 4: Example of HOLD Function

User Reset

You can reset the pH calibration to the factory default by using the user reset function. Buffer set selection and temperature user calibration (pHTestr30) are not affected by the user reset function.

1. Switch off the tester.

2. While pressing the ‘CAL’ button, press and release the ON/OFF button to enter the ‘User Reset’ selection menu. The screen will display ‘rSt’ on the bottom display with a flashing ‘nO’ selection.

3. Use the ‘CAL’ button to toggle between ‘nO’ and ‘YES’ selection.

• nO deactivates reset selection

• YES activates the reset selection

4. Press the HOLD/ENT button to confirm the selection made.

5. If you have selected ‘YES’, the unit will show ‘CO’ momentarily and proceed to the measurement mode with the calibration reset back to factory default value.

6. If ‘nO’ is selected, the unit will proceed to the measurement mode without any calibration reset performed.

With meter powered off, press CAL and ON/OFF at the same time. First release ON/OFF button, then CAL button.

Figure 5: User Reset Sequence

Automatic Temperature Compensation (ATC)

ATC feature is available only in pHTestr 10, pH Testr 20 and pH Testr 30. Through its inbuilt temperature sensor, the measurement error due to the changes in electrode sensitivity due to changes in temperature is compensated to give the actual pH reading of the sample measured.

pH Testr10BNC and pH Spear has no ATC function and therefore the error should be calculated to derive the actual pH reading of the sample. For these testers, the impact on temperature compensation is 0.003 pH /°C / pH away from pH 7. For example, if pHSpear is calibrated at room temperature (25 °C) and is measuring sample around pH 4 at around 5 °C.

Temperature difference : 25°C - 5°C = 20 °C pH away from neutral : 7pH - 4pH = 3 pH Total error : 0.003 x 20 x 3 = 0.18 pH

This error value of 0.18 pH should be taken into consideration to derive the actual pH reading of the sample.

After reset, whole LCD segment lits up and goes back to measurement mode.

Temperature Calibration (Only for pHTestr 30)

From the measurement mode,

1. Press the HOLD/ENT button to bring the tester to the ‘HOLD’ mode.

2. Press the CAL button for 3 seconds to switch to the °C or °F mode setting selection screen. Pressing the CAL button continuously for 3 seconds allows you to toggle in between the °C and °F mode setting selection screen.

3. Release the CAL button to confirm your mode selection and the display will go to the temperature calibration mode with the upper display flashing. The upper display shows the current measured temperature reading based on the last set offset and the lower display shows the current measured temperature reading based on factory default calibration.

4. Dip the tester into a solution of known temperature and allow time for the in built temperature sensor to stabilize.

5. Press the HOLD/ENT button to set the upper display to the temperature value of the solution.

6. Once the new temperature setting is reached, the new value is automatically confirmed and returns to the measurement mode if no button is pressed after 5 seconds.

Notes: To exit this program without confirming the calibration, press the CAL button before the automatic confirmation takes place.

Continuous pressing of CAL button (about 3

seconds) to toggle between temperature setting of degrees Celsius and Farenheit

Release CAL button to start entering the

When the

temperature offset

During calibration, upper display will flash.

Press HOLD/ENT to increase offset up to

+5 °C (+9 °F) from default value. It will

roll over to -5 °C (-9 °F) from default value

and start increasing a gain.

value is reached, the new value is

automatically

confirmed if no

key is pressed

for 5 seconds.

Figure 6: Temperature Calibration Sequence ( Only for pHTestr 30DJ)

new temperature

Electrode Maintenance

1. Rinse the electrode with tap water or electrode storage solution after each measurement. Care has to be taken not to damage the sensor’s glass electrode especially while rinsing the pHSpear penetrating tip electrode.

2. In aggressive chemicals, dirty or viscous solutions, and solutions with heavy metals or proteins, take readings quickly and rinse electrode immediately afterward. For the pHSpear, the remnants of the semi solid samples on the penetrating electrode can be removed by rubbing it with some table salt and then rinsing. Mild detergent can be used to wash the penetrating electrode clean.

3. If possible, keep a small piece of paper or sponge in the electrode cap – moistened with clean water or electrode storage solution (NOT de-ionized water) – and close the cap over the electrode. For pHSpear, ensure that the electrode is kept soaked in electrode storage solution or tap water via its protective cap.

Changing Batteries

1. Open battery compar tment lid (with attached lanyard loop).

2. Remove old batteries; replace with fresh ones. Note polarity

Self-Diagnostic Messages

Low battery

indicator

Over range / Under range

signal

Error

Message

Or / UrOr / Ur

Or / Ur

Or / UrOr / Ur

(Still)

ATC / Or /ATC / Or /

ATC / Or /

ATC / Or /ATC / Or /

Ur Ur

(Blinking)

Ur Ur

ErEr

3 Bars indicates Battery is full (100%)

2 Bars indicates 50% of the battery life is left

1 Bar indicates 25% of the battery life is left

Blinking battery casing indicates the need to replace batteries with fresh ones as specified by manufacturer

Electrode is not in contact with solution or electrode is failing.

Replacement sensor is not connected properly to the tester during sensor replacement

Measured pH value or temperature value (pHTestr30) exceeds its specified maximum or minimum value

Blinking ‘ATC’, ‘Or’ or ‘Ur’ indicates that there is a short or open circuit at the built in temperature sensor

Temperature calibration error of attempting to calibrate

.0.0

tester to a value which is out of range or under range

pH calibration error of attempting to confirm a calibration

.1.1

value which is not within the specified calibration window

Electrode Replacement

You can replace the electrode module at the fraction of the cost of a new tester. When the tester fails to calibrate or gives fluctuating readings in calibration standards, you need to change the electrode.

1. With dry hands, grip the ribbed tester collar with electrode facing you. Twist the collar counter clockwise (see picture A). Save the ribbed tester collar and O-ring for later use.

2. Pull the old electrode module away from the tester.

3. Align the four tabs on the new module so that they match the four slots on the tester (see picture B).

4. Gently push the module onto the slots to sit it in position. Push the smaller O-ring fully onto the new electrode module. Push the collar over the module and thread it into place by firmly twisting clockwise.

Note: It is necessary that you recalibrate your tester prior to measurement after an electrode replacement.

Rotate collar

away from you

Rlbbed collar

Figure 7: Removal of collar from tester

Insert Electrode Module

Electrode Module

Small O-ring

Figure 8: Example of electrode module

Small Tab Large Tab

fitting alignment

Large

O-ring

Applications

Water quality testing • pools • spas • aquariums • aquaculture • hydroponics • ecology studies • water and wastewater treatment • boilers • steam generators • car washes • sanitation plants • labs • food sectors and more!

Warranty

The waterproof pHTestr10, pHTestr20, pHTestr30, pHTestr10BNC and pHSpear are warranted to be free from manufacturing defects for 2 years and electrode module for 6 months. If repair, adjustment or replacement is necessary and has not been the result of abuse or misuse within the time period, please return the tester – freight prepaid – and correction will be made without charge. Out of warranty products will be repaired on a charge basis.

Return of Items

Authorization must be obtained from your distributor before returning items for any reason. When applying for authorization, please include information regarding the reason the item(s) are to be returned.

Note: We reserve the right to make improvements in design, construction and appearance of products without notice. Prices are subject to change without notice.

Accessories

ItemItem

Item

ItemItem

pHTestr 10,20,30 replacement sensor ECPHWPSEN 03 OKPHWPSEN03 pHTestr10BNC replacement sensor ECPHWPSENBNC OKPHWPSENBNC pHSpear replacement sensor ECPH WPSEN0 4 OKPHWPSEN04

Specifications

Large Screen Testers 10BNC

pH Range -1.0 to 15.0 pH -1.00 to 15.00 pH

Resolution 0.1 pH 0.01 pH

Relative Accuracy 0.1 pH 0.01 pH

Calibration Points Up to 3 points Up to 3 points

Buffer Set USA - 4.0/7.0/10.0 USA - 4.01/7.00/10.01 Standard Selection NIST - 4.0/6.9/9.2 NIST - 4.01/6.86/9.18

Calibration Window +/-1.0 pH (pH 4.0 +/-1.00 pH (pH 4.01 & pH 10.01), (USA Buffer Set & pH 10.0), +/-1.50 pH (pH 7.00) Standard) +/-1.5 pH (pH 7.0)

Calibration Window +/-1.0 pH (pH 4.0 +/-1.00 pH (pH 4.01 & pH 9.18), (NIST Buffer & pH 9.2), +/-1.25 pH (pH 6.86) Set Standard) +/-1.2 pH (pH 6.9)

Temperature No 0-50.0°C or No Display 32.0-122.0°F

Automatic Temperature Yes No ( Fix Temp Compensation Compensation (ATC) at 25°C)

Temp Resolution No 0.1 °C / °F No

Temp Accuracy No 0.5 °C / 0.9 °F No

Temp Calibration No +/- (5°C /9 °F) No Window from default value

Auto Off After 8.5 minutes from last key press User reset Yes Non Volatile Yes Memory Backup LCD Display Dual Power Requirement 4 x 1.5V “A 76” micro Alkaline Batteries Battery life More than 500 hrs Operating Temperature 0 – 50 °C Tester Dimensions 6.5 “L x 1.5”dia. (165 x 38 mm) 9.75 “L x

Weight 3.25 oz (90 gm)

Penetrating electrode total length Not applicable 91 mm Shaft length Not applicable 31 mm Penetrating electrode upper diameter Not applicable 12 mm Shaft diame ter Not applicable 7 mm

Eutech InstrumentsEutech Instruments

Eutech Instruments

Eutech InstrumentsEutech Instruments Order CodeOrder Code

Order Code

Order CodeOrder Code

pHTestr10 pHTestr20 pHTestr30

Oakton InstrumentsOakton Instruments

Oakton Instruments

Oakton InstrumentsOakton Instruments Order CodeOrder Code

Order Code

Order CodeOrder Code

pHTestr

pHSpear

1.5”dia. (247 x

38 mm)

68X068042 11/04 Rev 2