Hanna Instruments HI98193 Instruction Manual
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Hanna Instruments HI98193 Instruction Manual

Dissolved oxygen bod/our/sour meter
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HI98193
Dissolved Oxygen
BOD/OUR/SOUR Meter

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Summary of Contents for Hanna Instruments HI98193

  • Page 1 HI98193 Dissolved Oxygen BOD/OUR/SOUR Meter...

  • Page 2: Dear Customer

    If you need additional technical information, do not hesitate to e‑mail us at tech@hannainst.com or view our worldwide contact list at www.hannainst.com. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
  • Page 3 PRELIMINARY EXAMINATION ....................GENERAL DESCRIPTION ...................... FUNCTIONAL DESCRIPTION ....................SPECIFICATIONS ........................ PROBE FUNCTIONAL DESCRIPTION ..................PROBE CONNECTION AND PREPARATION ................OPERATIONAL GUIDE ......................OUR MEASUREMENT ......................SOUR MEASUREMENT ......................TEMPERATURE MEASUREMENT ................... DO CALIBRATION PROCEDURE ..................... GOOD LABORATORY PRACTICE (GLP) ..................SETUP ..........................
  • Page 4 Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer or the nearest Hanna Customer Service Center. Each instrument is supplied with: •...
  • Page 5 Demand (BOD), Oxygen Uptake Rate (OUR) and Specific Oxygen Uptake Rate (SOUR). HI98193’s calibration has been greatly simplified when compared to other dissolved oxygen instruments. It is provided with a series of new features which add entirely new dimensions to the measurement of DO, by allowing the user to dramatically improve the reliability of the measurement: •...

  • Page 6: Front View

    FRONT VIEW 1) Liquid Crystal Display (LCD). 2) F1, F2, F3 functional keys. keys to manually increase/decrease the parameters or to scroll through the menu. 4) ON/OFF ( ) key, to turn the instrument ON and OFF. 5) LIGHT ( ) key, to toggle display backlighting. 6) GLP key, to display Good Laboratory Practice information.

  • Page 7: Top View

    TOP VIEW 14) Electrode DIN connector. 15) USB connector.
  • Page 8 Range 0.00 to 50.00 mg/L / 0.0 to 600.0 % saturation Dissolved Oxygen Resolution 0.01 mg/L / 0.1 % saturation Accuracy ±1.5 % of reading ±1 digit Range 450 to 850 mmHg Barometric Pressure Resolution 1 mmHg Accuracy ±3 mmHg within ±15 % from the calibration point Temperature Range ‑20.0 to 120.0 °C (‑4.0 to 248.0 °F)
  • Page 9 1. DO Probe 2. Protective Cap 3. Watertight Shielded Cable 4. Polypropylene Probe Body 5. Temperature Sensor 6. O‑Ring Seal 7. Silver Chloride Anode 8. Platinum Cathode (sensor) 9. Oxygen Permeable PTFE Membrane ® 10. Membrane Cap...
  • Page 10 Probes shipped from Hanna Instruments are dry. To hydrate the probe and prepare it for use, connect it to the meter and proceed as follows: 1.

  • Page 11: Initial Preparation

    INITIAL PREPARATION The instrument is supplied complete with batteries. See Batteries Replacement for details, page 59. To prepare the instrument for field measurements close the USB communication socket and all unused connector sockets with proper stopper (to ensure waterproof protection). Connect the DO probe to the 7‑pin connector.

  • Page 12: Salinity Compensation

    SALINITY COMPENSATION If the sample contains significant concentration of salinity, the read out values must be corrected, taking into account the lower degree of oxygen solubility in this situation. Before taking any DO measurements remember to set the salinity value from the SETUP menu (page 30). The salinity affects the DO concentration, decreasing its value.

  • Page 13: Barometric Pressure Compensation

    Note: The relationship between salinity and chlorinity for seawater is given by the equation below: Salinity (g/l) = 1.80655 Chlorinity (g/l) BAROMETRIC PRESSURE COMPENSATION The dissolved oxygen saturation value varies with pressure, so it is important to compensate the effect that pressure has on DO measurements.
  • Page 14 HI98193 meter contains a built‑in barometer, and it is able to automatically compensate for changes in barometric pressure. If another pressure value than the barometer’s reading is to be used, then the manual pressure feature must be enabled from the SETUP menu (see page 30), and afterwards the pressure value can be set using the / keys.
  • Page 15 BOD MEASUREMENTS Biochemical oxygen demand (BOD) is an indicator for the concentration of biodegradable organic matter present in a sample of water. It can be used to infer the general quality of the water and its degree of pollution. BOD measures the rate of oxygen uptake by microorganisms in a sample of water at a fixed temperature and over a given period of time.
  • Page 16 BOD Parameters: • Bottle ID: a number used to identify a specific bottle. Range: 0000 to 9999. • The type of the Sample: Sample or Seed. • Bottle Volume: the total volume of the BOD bottle. Range: 0.1 to 300.0 mL. •...
  • Page 17 Use the / keys to scroll the list of BOD initial data records. Press More to view detailed information for the selected record. Press Pg Up/Pg Down to view the next/previous screen of information. Use the / keys to view the detailed information about the next/previous record. If Delete is pressed, use the / keys to highlight the record to be deleted and then press CFM.
  • Page 18 Press Eval. BOD to compute the BOD for the selected bottle. If the time difference between the current reading and the selected reading is less than 1 day the instrument will ask for record replacement confirmation, and the BOD can’t be evaluated. Press CFM to replace the selected records DO, temperature, pressure and salinity values with the current values.
  • Page 19 Note: If the Autodelete BOD start data option is enabled in SETUP (see page 30), when the BOD result is saved (LOG key is pressed) the corresponding BOD initial data record will be automatically deleted from the instrument’s memory. Seed Correction In case that the BOD was evaluated for a seeded sample and the list of the saved seed BOD values is not empty, the Correct functional key will be displayed.
  • Page 20 The OUR is used to determine the oxygen consumption or respiration rate in water. It is defined as the mg/L of oxygen consumed per hour. The following equation is used for OUR determination: where: = Dissolved oxygen level at start of test START = Dissolved oxygen level at end of test = Elapsed time of test in seconds...
  • Page 21 To end the OUR test before the maximum time interval set during OUR configuration press Stop. If Stop is pressed before the minimum time for the OUR test has elapsed, the instrument will display a warning message. Press Resume to continue the test or Stop to end the test. At the end of the test the meter will display the computed OUR value and the duration of the test.

  • Page 22: Temperature Correction

    The Specific Oxygen Uptake Rate (SOUR), also known as the oxygen consumption or respiration rate, is defined as the milligram of oxygen consumed per gram of volatile suspended solids (VSS) per hour. This quick test has many advantages: rapid measure of influent organic load and biodegradability, indication of the presence of toxic or inhibitory wastes, degree of stability and condition of a sample, and calculation of oxygen demand rates at various points in the aeration basin.
  • Page 23 If the minimum start DO condition is met the instrument will display the instantaneous specific oxygen consumption rate and the amount of time that has passed from the beginning of the test. In case that the SOUR value is corrected to 20 °C (68 °F) and the measured temperature isn’t in the range 10 to 30 °C the temperature value will blink to alert that the temperature correction isn’t valid.
  • Page 24 Press LOG to save a complete set of data regarding the SOUR test. Press Start to begin a new SOUR test. Notes: If the DO reading is less than the minimum end DO value set during SOUR configuration, a warning message will be displayed. Press any key to clear the message from the screen, or press HELP to view detailed information about the warning.
  • Page 25 The DO probe has a built‑in temperature sensor. The measured temperature is indicated on the display. Allow the probe to reach thermal equilibrium before taking any measurements. This can take several minutes. The greater the difference between the temperature at which the probe was stored and the temperature of the sample, the longer the time will be.
  • Page 26 The DO calibration screen will be displayed and the standard 0% saturation (or 0 mg/L, depending on the currently selected measuring unit), will be automatically selected. The hourglass icon will be shown on the display until the reading becomes stable. When the reading is stable and within range of the selected standard, the CFM functional key is displayed.
  • Page 27 Press CFM to confirm the calibration point. The instrument will return to the main screen and will memorize the slope calibration data. Two points automatic calibration Submerge the probe into HI7040 zero oxygen solution and stir gently for 2‑3 minutes. Press CAL.
  • Page 28 Press CFM to confirm the calibration point. The instrument will return to the main screen and will memorize the calibration data. Notes: If the manual pressure feature is enabled, during the DO calibration it is possible to switch between changing the standard value or the pressure value by pressing the Pressure/Standard functional key or the MODE key.

  • Page 29: Expired Calibration

    GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding DO calibration is stored for the user to review when necessary. EXPIRED CALIBRATION The calibration time out can be set (see SETUP for details, page 30) from 1 to 7 days or can be disabled. The instrument is provided with a real time clock (RTC) in order to monitor the time elapsed since the last DO calibration.
  • Page 30 Setup mode allows viewing and modifying the measurement parameters. The following table lists the SETUP parameters, their valid range and the factory default settings. Item Description Valid value Default Calibr. Time‑out Number of days after Disabled, 1 to 7 Disabled calibr.
  • Page 31 Total volume The total volume of the solution to 0.1 to 300.0 mL 0.1 mL be tested Sample volume The volume of sample in the 0.1 to 300.0 mL 0.1 mL solution to be tested Solids weight Total solids or Volatile Suspended 0.1 to 300.0 g/L 0.1 g/L solids weight...

  • Page 32: Parameter Screens

    Language Message display language Up to 3 languages English Beep ON Beeper Status Enabled or Disabled Disabled Instrument ID Instrument identification 0000 to 9999 0000 Baud Rate Serial Communication to PC 600, 1200, 2400, 4800, 9600 9600 Meter Information Displays general information PARAMETER SCREENS Calibration Timeout Highlight Calibration timeout.

  • Page 33: Bod Configuration

    Use / keys to change the salinity value. Press Accept to confirm or ESC to exit without saving. BOD Configuration Highlight BOD configuration. Press Select Parameters: • Sample min ∆ DO ‑the minimum acceptable difference between the initial and final DO values for a sample.

  • Page 34: Our Configuration

    OUR Configuration Highlight OUR configuration. Press Select. Parameters: • Min time ‑ the minimum time for the OUR test. Range: 1 to 3600 seconds. • Max time ‑ the maximum time for the OUR test. The test will stop automatically when the maximum time has elapsed.
  • Page 35 SOUR Configuration Highlight SOUR configuration. Press Select. • Min time ‑ the minimum time for the SOUR test. Range: 1 to 3600 seconds. • Max time ‑ the maximum time for the SOUR test. The test will stop automatically when the maximum time has elapsed.
  • Page 36 Autodelete BOD Start Data Highlight Autodelete BOD start data. Press the displayed functional key to enable/disable the feature. If enabled the BOD initial data record used in BOD result evaluation is deleted automatically after the BOD result has been saved into the instrument’s memory (LOG key pressed). If disabled, the user has to delete BOD initial data records that were used in BOD result evaluation, entering View initial BOD data mode.

  • Page 37: Temperature Unit

    Use / keys to highlight the desired pressure unit. Press Accept to confirm or ESC to exit without saving. Temperature Unit Highlight Temperature Unit. Press the displayed functional key in order to change the temperature unit. Backlight Highlight Backlight. Press Modify. keys to change intensity then press Accept to confirm.
  • Page 38 keys to change intensity then press Accept to confirm. Press ESC to leave without changing. Auto Light off Highlight Auto Light off. Press one of the functional keys to change the option. Auto power off Highlight Auto power off. Press Modify. / keys to select interval then press Accept.

  • Page 39: Time Format

    Date/Time Highlight Date / Time. Press Modify. keys to select item. Use / keys to change the focused values. Press Accept to confirm the new setting, or ESC to leave without changing. Time Format Highlight Time format. Press functional keys to change the option. Date Format Highlight Date Format.
  • Page 40 Language Highlight Language. Use the desired functional key to change the option. Wait until the new language is loaded. If any language can be loaded, the instrument will work in safe mode. In this mode all messages are displayed in English and Help is not available. Beep On Highlight Beep On.

  • Page 41: Meter Information

    Baud Rate Highlight Baud Rate. Press Modify. Use / keys to select the desired communication baud. Press Accept to confirm or ESC to exit. Meter Information Highlight Meter Information. Press Select. The meter information is displayed: ‑Firmware version ‑Language version ‑DO and Temperature factory calibration date/time ‑Battery Capacity...

  • Page 42: View Logged Data

    This feature allows the user to log DO, BOD, OUR and SOUR measurements. All logged data can be transferred to a PC through the USB port using HI92000 application. The maximum logging space is 400 records. LOGGING THE CURRENT DATA To store the current reading into memory, press LOG.
  • Page 43 OUR recall: SOUR recall: If there is no logged data, the instrument will display “No Records”. / keys to scroll the list of records. Press Delete All to enter Delete All screen. Press Delete to enter Delete records screen. Press More to view more information of the focused record. If More is pressed, a complete set of information is displayed.
  • Page 44 Note: “S.C. “ message in the title bar means seed corrected. “not S.C.” message in the title bar means seed not corrected. The Correct functional key will be displayed if the BOD result was not seed corrected. Note: For a seed corrected sample, the last page will show the Seed bottle ID used for correction. OUR recall: SOUR recall: Note: In case that the SOUR value was corrected to 20 °C the message “(@20 °C)”...
  • Page 45 / keys to view the complete log information about the next/previous record while displayed. If Delete is pressed. / key to highlight the record to be deleted and then press CFM. Press ESC to exit. If Delete All is pressed the instrument asks for confirmation. Press CFM to confirm or ESC to exit without deleting.
  • Page 46 To freeze the first stable reading on the LCD press AutoEnd while the instrument is in DO measurement mode. The “Wait” symbol will blink until the reading is stable. When the reading is stable “Hold” icon will be displayed. Press Continue at any moment in order to enter continuous reading mode.
  • Page 47 HI98193 meter has an internal barometer for automatic pressure compensation for DO readings. The instrument is factory calibrated for pressure measurements and no user calibration is needed. If the pressure reading is inaccurate, a pressure calibration should be performed. For an accurate calibration follow the instructions below.
  • Page 48 Note: If a pressure calibration has been previously performed it is possible to erase the calibration by pressing the Clear functional key. The “Calibration cleared” message will be displayed for a few seconds and the meter will return to the main screen. If the measured pressure is too far from the calibration point the “Wrong pressure”...
  • Page 49 All the instruments are factory calibrated for temperature. Hanna’s DO probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibration should be performed. For an accurate recalibration follow instructions below. The temperature calibration can be performed in one or two points.
  • Page 50 • When the reading is stable and within range of the selected calibration point, the CFM functional key is displayed. • Press CFM to confirm. • The second expected calibration point is displayed. • Immerse the DO probe into the second vessel as close as possible to the reference thermometer. •...
  • Page 51 Note: If the reading is not within range of the selected calibration point or the difference between first selected point and second selected point is less than 25 °C, “Wrong” message will blink. If the cause of “Wrong“ message is the difference between calibration points increase the temperature of the vessel with hot water until the calibration points are more than 25 °C apart.

  • Page 52: Command Types

    USB socket and the other to the serial or USB port of your PC. Note: If you are not using Hanna Instruments HI92000 software, please see the following instructions. SENDING COMMANDS FROM PC It is also possible to remotely control the instrument with any terminal program.
  • Page 53 CHR xx Change the instrument range according to the parameter value (xx): • xx=20 DO range • xx=21 BOD range • xx=22 OUR range • xx=23 SOUR range The instrument will answer for these commands with: <STX> <answer> <ETX> where: <STX>...
  • Page 54 • 0x04: out of calibration range • 0x08: the meter is in autoend mode • Reading status: R ‑ in range, O ‑ over range, U ‑ under range • The following status flags are sent for all modes except mode 25 •...
  • Page 55 Requests the setup parameters setting. The answer string contains: • backlight value (1 char) • contrast value (2 chars) • instrument ID (4 chars) • calibration alarm timeout (2 chars) • Setup information (2 chars): 8 bit hexadecimal encoding: • 0x01: ‑ beep is on •...
  • Page 56 NSLx Requests the number of logged samples (4 chars) The command parameter (x ‑ 1 char) • D ‑ the request is for DO • B ‑ the request is for BOD • O ‑ the request is for OUR •...
  • Page 57 • Sample volume including sign and decimal point [ml] (6 chars) • Seed volume including sign and decimal point [ml] (6 chars) • Start salinity value [g/L] (3 chars) • End salinity value[g/L] (3 chars) • Start pressure value in mmHg, including sign and decimal point (11 chars) •...
  • Page 58 • SOUR temperature correction (1=SOUR@20°C, 0=SOUR not corrected) (1 char) • BOD DATA log data: • Sample type (1 = sample, 0 = seed) (1 char) • Bottle ID (4 chars) • DO value, including sign and decimal point [mg/L] (8 chars) •...
  • Page 59 To replace the batteries, follow the next steps: • Turn OFF the instrument. • Open the battery compartment by removing the four screws from the back of the instrument. • Remove the old batteries. • Insert four new 1.5V AA batteries in the battery compartment while paying attention to the correct polarity.
  • Page 60 The oxygen probe is made of reinforced plastic for maximum durability. A thermistor temperature sensor provides temperature measurements of the sample. Use the protective cap when not in use. To replace the membrane or refill with electrolyte, proceed as follows: Remove the protective cap by gently twisting, and pulling it off the body of the probe (see fig.
  • Page 61 SYMPTOMS PROBLEM SOLUTION Reading fluctuates up DO probe not properly Connect the probe. and down (noise). connected. Display shows DO Reading out of range. Recalibrate the meter; reading blinking. Check the sample is within measurable range. Meter fails to calibrate Broken DO probe.
  • Page 62 Code Description Digital thermometer (range: ‑50.0 to 150.0 °C/‑58.0 to 302 °F) HI98501 HI7040L Zero Oxygen Solution HI7041S Refilling Electrolyte Solution (30 mL) HI764073 Spare probe with 4 meter (13.4’) cable HI76407A/P Spare membranes (5 pcs.) HI92000 Windows compatible software application ®...

  • Page 63: Warranty

    Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for complete protection. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advanced notice.
  • Page 64 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com Local Office Hanna Instruments USA 270 George Washington Highway Smithfield, RI 02917 Phone: 800.426.6287 Fax: 401.765.7575 e‑mail: tech@hannainst.com MAN98193 03/16 Printed in ROMANIA...

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