Graigar AR8406 Dissolved Oxygen Meter with Polarographic Probe User Manual

Graigar AR8406 Dissolved Oxygen Meter with Polarographic Probe

Product Information

• Specifications
  • Model: Diaphragm Sleeve Replacement Kit
  • Compatibility: Works with most diaphragm-based measurement devices
  • Includes: Diaphragm sleeve, O-type waterproof ring
  • Material: Platinum for water drop effect correction

Product Usage Instructions

• Cleaning the Diaphragm:
  • If the measured data is unstable due to lack of cleaning, follow these steps:
  • Unscrew the diaphragm sleeve carefully.
  • Replace the diaphragm sleeve with a new one.
  • Ensure the O-type waterproof ring is properly in place.
• Air Bubbles:
  • If air bubbles are affecting measurements:
  • Check for any air bubbles in the system.
  • If present, carefully remove the air bubbles.
• Startup Mode Settings:
  • To adjust startup mode settings:
  • Press the Enter key to access P74 startup mode.
  • Use the Mode/ or Save/ key to select your desired startup mode.
  • Press the Enter key to save the setting.
  • Press the CAL/ESC key to return to normal measurement mode.

FAQs

• Q: How often should I replace the diaphragm sleeve?
  • A: It is recommended to replace the diaphragm sleeve regularly, especially if you notice unstable measured data or air bubbles in the system. A general guideline is to replace it every 3-6 months, but frequency may vary based on usage.
• Q: Can I use this kit with any type of measurement device?
  • A: The diaphragm sleeve replacement kit is designed to work with most diaphragm-based measurement devices. However, it is advisable to check compatibility with your specific device model before use.

Introduction

• Thank you for your purchase of our Dissolved Oxygen meter.
• This Dissolved Oxygen device is an intellectual precise measurement apparatus. It designed and made with imported components and sensor. It has high sensitivity and accuracy, stable to work with different temperature, small size for easy storage and hand carry. It can measure the dissolved oxygen value and measure solvent’s temperature under test. Dissolved oxygen meter widely applied in industrial, electrical and agriculture, medicine, food industrial, quality of drinking water etc. You must read through this instruction before using this device to get the correct reading.
• When you open the box, please check the unit is work fine, accessories are full or not, if you find any accessories missing, please contact your supplier or call our agency.

Product Specification

Key Function

• SET key: Depress it to turn the unit ON or OFF, depress it for more than two seconds go to SETUP mode.
• CAL/ ESC key: At normal measurement mode depress it for more than 3 seconds go to Calibration mode, in setup mode depress it escape from setup mode.
• Recall key: Depress it to turn the backlight ON or OFF, and depress it for more than 3 seconds to recall the stored data. In this mode depress “ ” or “ ” key to move up or down the data record. Depress the ESC key escape from this mode.
• Mode / key: Select mode/increase
• Save / key: Select mode /reduce / in normal measurement mode, depress it can save data (maximum 99 records.
• Enter key: confirm key.

Calibration step

1. Depress the SET key and turn the unit ON.
2. In Calibration mode, if you want to show in %, the depress Mode key can be switched between mg/L and %.
3. Wait until the measurement value becomes stable, and ensure no water or mud at the golden electrode. (Figure 4).
4. Depress the “CAL/ESC” key for more than 1 second go to Calibration mode, wait a few minutes for auto-calibration to complete, or depress the “Enter” key to complete the calibration. After calibration, LCD shows 99~101% is normal, if over this range, please repeat the calibration. sure no water or mud at the golden electrode.
5. Depress “Mode / ” key to switch between “mg/L” can start to measure.
6. When turn the unit ON, LCD screen show “SLO” is normal startup, it is factory default mode, must be wait few minutes to let the instrument become stable. When turn the unit ON, LCD screen show “FAS”, it is fast startup, only need few seconds to make it stable, but the consumption of Electrolyte will be faster than normal startup: If you want instrument startup with FAST startup, at normal measurement, depress “Recall”+ “Enter”key at the same time more than 3 seconds, you can switch SLO or FAS sequentially.
7. If no any key in detected, unit will be turn off after one hour; To cancel the auto power off function, in unit turn off stage, depress “SET” + “Mode/ ” at the same time to turn the unit ON, until LCD screen show “n”wording, it means no auto power off, unit will turn on until you turn it off manually.

MEASUREMENT

1. Please immerse the electrode probe into the water under the measure (probe head can’t touch the bottom of the pool), and then stir the probe slowly (if you don’t stir it, the reading will decrease timely, lower than the real value), after few minutes, when the temperature of the probe same as the water under test, than you can take the measured value, (if you are measuring the saltine water or measure at high altitude area, setup the saltine water compensation or altitude compensation before measure.

SETUP

1. P10 Deleted stored data: In normal measurement mode, depress “O/SET”key go to setup mode P10, depress”Enter”key go to P11, depress “Model/ “or “Save/ “key LCD screen show “YES” wording, depress”Enter”key to confirmed deleted all stored data and back to P10.
2. P70 Dissolved Oxygen parameter: In setup P10, depress “Mode/ ” or “Save/ ” key switch to P70,
   • a) Depress “Enter” key go to P71 dissolved Oxygen calibrated temperature, if the real time temperature compare to calibrated temperature is large than 10°C, when measure will show “E21” remind code;
   • b) Depress “Enter” key go to P72 saltine compensation, depress “Model/ ” or “Save/ ” key to adjust to real saltine value, (fresh water is 0.0ppt), depress “Enter” key to save setting.
   • c) Depress “Enter” key go to P73 Altitude compensation, depress “Model/ ” or “Save/ ” key to adjust the local area altitude, depress “Enter” key to save setting.
   • d) Depress “Enter” key go to P74 startup mode, depress “Model/ ” or “Save/ ” key to your desired startup mode, depress “Enter” key to save setting, finally depress “CAL/ESC” key back to normal measurement mode.
3. P80 selection temperature unit: In setup mode P10, depress “Mode/ “or”Savel ” key switch to P80, depress “Enter” key go to P81, then depress “Model/ “or”Save/ ” key switch to °C/’F unit, depress “Enter” key to save setting, finally depress “CAL/ESC” key back to normal measurement mode.

Replace diaphragm sleeve

1. If below situation happened, please replace the diaphragm sleeve immediately.
   • a) Sensor probe used more than one year.
   • b) In calibration mode if E02 or E03 code appeared, please change the diaphragm sleeve then calibrate again.
   • c) Diaphragm sleeve become loose, wrinkles or damaged (Figure 1)Measured data abnormal or response time become very slow, please replace the diaphragm sleeve then calibrate again.

Step by step to replace diaphragm sleeve

• a) Unscrew the diaphragm sleeve, if the o ring broken, ageing, please also replace with a new o ring.
• b) Use sharp object, for example knife or scissors to clean up the dirty things of the probe body, be careful don’t touch the top end of the sensor head !!!. After cleaned as (figure 3) shown. Top end if have dirty thing, please clean if with your nail. (don’t use any hard object to clean it!)
• c) Use soft paper to dry the surface of the electrode, then use sand paper to clean the top end with light force (Figure 4), then use pure water to clean and clear the electrode again, please do it few time to sure it is fully cleaned, then dry it (figure 5).
• d) Confirm to unscrew the plastic screw (Figure 6): Confirm no any dirty thing inside the diaphragm sleeve, then place it on the gauze upside down, slowly pour over electrolyte (Figure 07), don’t have any bubble find, if found any dirty thing or bubbles, please replace with new electrolyte again.
• e) Place the test probe to the top of the sensor head, screw it slow until tighten, sure the o ring is press down firmly, diaphragm Sleeve can only be tighten slowly, if you find any bubble appeared after tightening (Figure 8), please use a Syringe to fill in more electrolyte to let it full (Figure 9), finally tighten up the plastic screw;

ERROR CODE

1. E02: Measured value over the lower limit
2. E03: Measured value over the upper limit
3. E04: Temperature measure error
4. E21: The different between the calibrated temperature and the environment temperature more than 10 °C.
5. E31: Hardware problem, need return to factory for repair.

Frequent question of using dissolved oxygen meter

1. Wrong operation: never clean the test probe. Whenever you finished the operation of the dissolved Oxygen meter, please use a freshwater to clean the test probe head (sensor head), clean up the muds, organic debris, algae and other attachments!
   Clean the diaphragm surface every half month (Otherwise in calibration will E02 error will appear); Detected the protection cover of the test probe, Take a tissue and knead it into a ball, drip it together with the test probe in water, Gently wipe the top of the diaphragm sleeve.

2. Wrong operation: Long time no calibration.
   Highly recommend do calibration frequent.

3. Wrong operation: no dry and clean after use. Every time after use, must clean it with cloth or tissue, place in a ventilated place to dry.

4. No use of a long period, next year when use it again don’t work.

   • a) Must be cleaned with fresh water and gently wipe the top of the diaphragm sleeve of the test probe head (sensor), place in a ventilated place to dry.
   • b) Examine the diaphragm sleeve is perfect or not, if find damaged, must be replaced and fill in electrolytes without bubble.
   • c) Take out the battery if not use for a period of time, to prevent leakage of battery material to damage the meter.
   • d) Stored in a place temperature higher than zero degree C, to prevent electrolyte freezing damage electrode.
     Warning: Syringe and syringe needle must keep away from the kids.

Special Announcement

• A) You, as the end user, are legally bound (Battery or finance) to return all used batteries and accumulator: disposal in the household garbage is prohibited”
  You can hand over your used batteries/accumulators at the collection points in your community or wherever batteries/accumulators are sold!
  Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the end of its life cycle.

• B) Our company to reserve the rights to modify and update the content of this manual and design specification without further notice.

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