Emaux 8686 pH-Temperature Meter User Manual

Emaux 8686 pH-Temperature Meter

Product overview

Congratulations on your purchase of this pen type pH meter. Please read the manual completely before using this meter. Filing and keeping the manual for future reference. Recommended to soak the electrode for at least 30 min. before using to clear up the lazy effect or to make the electrode wet if the pH electrode dries out.

Features

• IP65 Waterproof housing.
• Dual display with ATC
• Data hold to freeze readings. Pen size, easy to fit in pocket. Low battery indicator.
• Auto power off.
• C/F unit switchable.
• Power by 4pcs LR44 batteries.
• Multi points calibration.
• One touch only for calibration.

Material Supplied

This package contains:

• The meter x 1
• LR44 button battery x 4
• Operation manual
• Color box or plain box

Power Supply

The meter is powered by 4 pcs LR44 batteries. To check the battery when:

1. First time use
2. The battery symbol appears on LCD
3. The meter cannot power on

To install the batteries:

1. Turn off the meter.

2. Loose the battery cover in counter-clockwise direction. (DON’T discard the black washer!)

3. Replace the old batteries with four new button cells LR44.

4. Make sure the batteries are in place and the polarity is correct.

5. Put back the battery cover & washer and turn it tightly in clockwise direction.

NOTE:

1. Please re-calibrate the meters after changing batteries.
2. Remove battery from instruments that you do not plan to use for a month or more. Do not leave battery in instrument.

LCD Display & Keypad

• The 1st display shows the measured pH reading.
• The 2nd display shows the temp.
• Cal=Calibration mode
• ATC=Auto Temp. Compensation
• Hold=Data hold

Operation

1. Remove the probe cover from meter to expose the electrode out. For 8686, it is normal if you find white crystals are present on the cap or electrode assembly.
   WARNING: For pH meters, please always make the sponge wet to keep the electrode in a good storage condition.

2. Dip the electrode into the test solution. Press ” power on the meter and stir it to get a stable reading.

3. A small dot ” ” is flashing while the meter is in measurement mode. The LCD not only shows the measured pH value but also displays the temperature.

4. Press “ ” to freeze current readings. The text “Hold” will appear on the LCD and the small dot (8684/85/86) will not flash. Press ” ” again to release the hold mode.

5. Turn off the meter by pressing  button.

6. Once finishing the measurement, clean the electrode, put back the cap, store the meter under the 0~50 ̊C.

7. Please see page 7 for the calibration procedures.

Auto Power off (sleep function)

This meter will shut off automatically 20 minutes of inactivity. For operating longer time, you can disable the sleep mode.
To disable the auto power off: Before power on, pressing keys simultaneously until a “n” appeared on the screen and then release keys to return to normal mode.
NOTE: The disable sleep mode will be invalid after every power off.

AUTOMATIC TEMPERATURE COMPENSATION (ATC) & TEMP. UNIT SETTING

The meters are capable of measuring with Automatic Temperature Compensation. “ATC” will show in the middle of the LCD.
To select the temp. unit (oC or oF), turn off the meter first. When the meter is off, press ” ” and “  ” at the same time until the C or F appears on the LCD. Press “ ” to select the preferred unit and then press ” ” to save.
“ ” will appear on the LCD for one sec and then go back to normal.

CALIBRATION MODE(CAL)

Calibration is necessary and should be done regularly, recommended everyday if the meter is used often. The unique calibration design of the meter features automatic buffer recognition to avoid errors.

1. Power on the meter.

2. Place the electrode into a buffer solution (4,7or10), pH7 should be calibrated first and then 4 or 10 pH for better accuracy.

3. Press ” ” or ” CAL ” to enter pH calibration mode. The text “CAL” will appear on the LCD for one second and then pH value (4,7 or 10) will be displayed on the LCD.

4. If probe or buffer is in error:
   If the buffer is incorrectly inserted or the probe is damaged or the probe cannot detect buffer in below voltage range, the meter will escape calibration mode automatically after 10 seconds. Text “En” or “End” will appear on the LCD in one second and then will go back to normal status. Acceptable voltage range of each point:
   PH 4.00 : 97mV…250mV
   PH 7.00 : -60mV…60mV
   PH10.00 : – 250mV…-97mV

5. If the probe recognizes the buffer: If the probe successfully recognizes the buffer, the buffer pH value (4 or 7 or 10) will appear on the display in 2 seconds.
   If the calibration buffer is not 4,7,10 but another value, such as 4.01, just press “ ” to change the value.

6. The adjustable cal. point range for 4.0 pH is from 3.50 to 4.50. For 7.0 pH is from 6.50 to 7.50. For 10.0 pH is from 9.50 to 10.50

7. To save the calibration value:
   When the electrode reads a stable value and user stops pressing any keys, the meter will automatically save the value and then escape the calibration mode.

8. Rinse the probe with de-ionized water or a rinse solution (tap water…) after each measurement to last the meter’s life.

9. Repeat above steps until the 3 point calibration are finished.

MAINTENANCE

• Please always keep the pH glass bulb wet by using the cap to protect and store the electrode.
• Always rinse the pH electrode in de-ionized water or rinse solution (tap water…? before next use.
• Never touch or rub glass bulb in order to last pH electrode life.
• Make sure the electrode is clean. Between measurements, rinse the electrode with deionized water. If the electrode has been exposed to a solvent immiscible with water, clean it with a solvent miscible with water e.g. ethanol or acetone and rinse carefully with water.
• Store the electrode carefully.

TROUBLESHOOTING

Power on but no display

1. Make sure the time of pressing power key is more than 1 second.
2. Check the battery are in place and make good contact and correct polarity.
3. Replace with new batteries and try again.
4. Move away the batteries for one minute and then put back again.

Slow response
Clean probe by immersing the electrode in tap water for 10-15 minutes, then rinse thoroughly with distilled water or use a general-purpose electrode cleaner.

LCD display “- – -”
Out of pH range, too acidic/or too alkaline.

“H.” Or “L.” ( For pH meter)
Out of temp. range, too cold/or too hot.

pH value fluctuates quickly
It is normal when the electrode is not immersed in the water but exposed in air.

SPECIFICATION

Operating Temp.: 0o~50oC (32~122oF) Operating Humidity: 0~80% RH pH calibration buffer suggested:

• Standard USA buffers
• Standard NIST buffers
• Standard DIN buffers
• Battery Life: >80 hrs continuous use

TERMS OF THE WARRANTY

As original purchaser of this equipment have purchased from Emaux Water Technology Co Ltd, through Authorized International Distributor or Dealer, warrants its products free from defects in materials and workmanship under normal use during warranty period. The warranty period begins on the day of purchase and extends only to the original purchaser. It is not transferable to anyone who subsequently purchases the product from you. It excludes all expendable parts.
During the warranty period, Emaux authorized reseller will repair or replace defective parts with new parts or, at the option of Emaux, serviceable used parts that are equivalent or superior to new parts in performance.
This Limited Warranty extends only to products purchased from Emaux authorized reseller. This Limited Warranty does not extend to any product that has been damaged or rendered defective

• as a result of accident, misuse or abuse;
• as a result of an act of God;
• by operation outside the usage parameters stated herein;
• by the use of parts not manufactured or sold by Emaux;
• by modification of the product;
• as a result of war or terrorist attack; or
• as a result of service by anyone other than Emaux authorized reseller or authorized agent.

EXCEPT AS EXPRESSLY SET FORTH IN THIS W A R R A N T Y , E M A U X M A K E S N O O T H E R WARRANTIES EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. EMAUX EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED IN THIS LIMITED WARRANTY. ANY IMPLIED WARRANTIES THAT MAY BE IMPOSED BY LAW ARE LIMITED TO THE TERMS OF THIS EXPRESS LIMITED WARRANTY.

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