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Iijima MA-300 Operation Manual

Do measuring device
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DO Measuring Device / MA-300
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Thank you for purchasing the IIJIMA DO Measuring Device, model MA-300.
This device can measure the dissolved oxygen (DO) in fluid using the optional residual oxygen meter PACK
MASTER, model RO-105S and a stirrer.
This manual describes how to operate the DO Measuring Device and the precautions that must be observed to
ensure proper and safe use. Always read this manual and fully understand the operation before starting use.
Keep this manual near the device for quick reference at any time.
Operation Manual
MA300TS-0210

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Summary of Contents for Iijima MA-300

  • Page 1 DO Measuring Device / MA-300 Operation Manual □□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□ Thank you for purchasing the IIJIMA DO Measuring Device, model MA-300. This device can measure the dissolved oxygen (DO) in fluid using the optional residual oxygen meter PACK MASTER, model RO-105S and a stirrer.

  • Page 2: Table Of Contents

    (3) Measuring a sample containing fibers or solids････････････････････････････････････････････ 15 6. Maintenance･････････････････････････････････････････････････････････････････････････････ 16 (1) Cleaning after measurement･･･････････････････････････････････････････････････････････ 16 1. Cleaning the MA-300･･･････････････････････････････････････････････････････････････ 16 2. Cleaning and storing the oxygen sensor･･････････････････････････････････････････････ 16 (2) Replacing the oxygen sensor membrane and electrolytic solution･･･････････････････････････ 16 7.

  • Page 3: Safety Precautions

    1. Safety Precautions This section explains the precautions that must be observed to prevent injury to the user or other persons or damage to property. The following symbols classify and explain the degree of harm or property damage that may result if the contents of the symbols are ignored and the product is used improperly.

  • Page 4: Confirmation Of Package Contents

    * When the product is shipped, the tubing part is not connected. Oxygen sensor (WAGNIT®) (Model: WA-BRM5) Membrane solution set (Model: GT-41) x 1 set is enclosed. * “WAGNIT®” is a registered trademark of the Iijima Electronics Corporation oxygen sensor. Maintenance parts (spare parts) 1 set ...

  • Page 5: Accessories (Options)

    (2) Accessories (options) Description Stirrer (model: KK) Product name: Ultra-Flat Digital Mini Magnetic Stirrer Distributor: KENIS, Ltd. MA300TS-0210...

  • Page 6: Names And Functions Of Each Part

    3. Names and functions of each part This device is shipped with part of the tubing parts removed so that excessive load is not applied on each part. Before starting use, refer to the schematic drawing below, connect each part, and install the device. The tubing is manually tightened with a luer fitting.

  • Page 7: Main Unit Display Area (Lcd Display Area)

    (1) Main unit display area (LCD display area) The following screen appears when the oxygen sensor (WA-BRM5) is connected to the PACK MASTER and the DO measuring mode is set. (Refer to section “4. Preparing for measurement (1) PACK MASTER (RO-105S) settings” on page 6 for details on setting the measurement mode.) <When DO MEASURE screen [mg/L] is displayed>...

  • Page 8: Preparing For Measurement･････････････････････････････････････････････････････････････････6

    4. Preparing for measurement (1) PACK MASTER (RO-105S) settings Before starting the DO measurement, set and confirm the 1. Measurement mode, 2. DO display, and 3. Span calibration method on the PACK MASTER main unit. The set details are saved even if the PACK MASTER power is turned OFF, the batteries are removed, or the AC adapter is disconnected.

  • Page 9: Do Display

    2. DO Display (DO [mg/L] / Saturation rate [%] setting) Step 1. Turn the PACK MASTER power ON, and press on the O Measurement Standby screen or DO MEASURE screen. The MENU screen opens, and “CAL” is selected (flashes). Step 2. Press once.

  • Page 10: Setting The Span Calibration Method (Saturated Water Calibration/Air Calibration)

    3. Setting the Span Calibration Method (Saturated water calibration/air calibration) Step 1. Turn the PACK MASTER power ON, and press on the O Measurement Standby screen or DO MEASURE screen. The MENU screen opens, and “CAL” is selected (flashes). Step 2. Press once.

  • Page 11: Span Calibration

    (2) Span calibration Perform span calibration once a day before starting measurements using the following procedure. There are two types of span calibration: air calibration and saturated water calibration. Refer to the following explanation and procedure, and select the span calibration method that matches your application. 1.

  • Page 12: Saturated Water Calibration Method

    2. Saturated water calibration method This calibration method follows JIS K0102. Calibration is performed using saturated water with dissolved oxygen (hereinafter, saturated water). Step 1. Prepare the saturated water. Fill a beaker with water, and perform aeration. (500 mL of water must be aerated for approx. 10 to 20 minutes.) Step 2.

  • Page 13: Zero Calibration

    (3) Zero calibration To measure low concentrations accurately, or if the value when measuring low concentrations seems abnormal (negative display or a higher value than usual), perform zero calibration following the procedure below. Step 1. Prepare the zero standard liquid (zero water). Dissolve 5 g of sodium sulfite in a container such as a beaker, and add water so that the total volume is 100 mL.

  • Page 14: Water Temperature Adjustment

    (4) Water temperature adjustment * The water temperature is adjusted at the time of shipment, so normally, this procedure is not required. If the deviation of the sample water’s temperature is a concern, the water temperature display can be adjusted manually using a standard thermometer.

  • Page 15: Measurement･････････････････････････････････････････････････････････････････････････････13

    5. Measurement This device is an option for the PACK MASTER (RO-105S). Dissolved oxygen (DO) in liquid can be measured with limited exposure to air using this device. The measurement value can be measured and saved as either the dissolved oxygen amount (mg/L) or dissolved oxygen saturation rate (%).
  • Page 16 Step 3. Using a syringe, feed the sample into the housing. Slowly pull out the syringe plunger taking approx. 5 seconds to suction 10 mL of the sample. Then slowly push in the syringe plunger taking approx. 5 seconds to discharge all of the sample solution in the syringe.

  • Page 17: Repeated Measurement

    (2) Repeated measurement (repeatedly measuring several samples) To measure multiple samples repeatedly, repeat Step 2 to Step 5 in section “5. Measurement (1) Measuring a sample” on page 13 of this manual. There is no need to operate the syringe in an upward direction during Step 3 in this case. When measuring a 350 mL sample, complete the measurement within three minutes of opening the plug.

  • Page 18: Maintenance

    6. Maintenance (1) Cleaning after measurement 1. Cleaning the MA-300 When finished measuring the sample, discharge the sample remaining in the syringe, housing, and tubing. Suction and discharge tap water by operating the syringe in the same manner as measuring a sample.

  • Page 19: Troubleshooting

    7. Troubleshooting If you suspect any malfunction or trouble, always perform the following confirmation and remedy before requesting repairs. If the symptoms do not subside, contact the dealer from which you purchased the product. Symptom Confirmation Action The value is high. Was air inadvertently suctioned Dispose of the sample solution being The value does not change...
  • Page 20 Reference: Refer to the Iijima Electronics Corporation website for information on troubleshooting, handling, and maintenance. https://www.iijima-e.co.jp/ Contact the dealer from which you purchased the product if you have any questions or inquiries regarding handling.

  • Page 21: Error Messages

    8. Error Messages An error message may display during the self-diagnosis during use. Check the details of the displayed error, and troubleshoot with the following actions. Symptom Confirmation Action Sensor error Is the oxygen sensor correctly Securely connect the oxygen sensor mounted? (WA-BRM5) to “DO IN”...
  • Page 22 Please contact the dealer from which you purchased the product if you have any questions or inquiries regarding handling, repairs, or inspections. 1-1, Ishida, Toyooka-cho, Gamagori-shi, Aichi 443-0011 JAPAN Telephone: +81-533-67-2827 Facsimile: +81-533-69-6814 https://www.iijima-e.co.jp MA300TS-0210...

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