Hanna Instruments HI2400 Instruction Manual
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Hanna Instruments HI2400 Instruction Manual

Dissolved oxygen bench meter
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Instruction Manual
HI2400
Dissolved Oxygen
Bench Meter
www.hannainst.com
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Summary of Contents for Hanna Instruments HI2400

  • Page 1 Instruction Manual HI2400 Dissolved Oxygen Bench Meter www.hannainst.com...
  • Page 2 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using these instruments. This manual will provide you with the necessary information for correct use of these instruments, as well as a precise idea of their versatility.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS PRELIMINARY EXAMINATION ............4 GENERAL DESCRIPTION ..............4 PROBE FUNCTIONAL DESCRIPTION ..........5 FUNCTIONAL DESCRIPTION .............6 SPECIFICATIONS ................7 OPERATIONAL GUIDE ..............8 DO CALIBRATION .................11 GOOD LABORATORY PRACTICE (GLP) ..........13 SETUP ..................14 LOGGING ..................19 TEMPERATURE CALIBRATION (for technical personnel only) .....22 PC INTERFACE ................24 PROBE AND MEMBRANE MAINTENANCE ........28 TROUBLESHOOTING GUIDE ............29...

  • Page 4: Preliminary Examination

    GENERAL DESCRIPTION HI2400 is a logging microprocessor‑based DO/Temperature bench meter. It can store up to 100 lots in memory, with up to 8000 readings. These readings can be transferred to a computer for further analysis or permanent storage.

  • Page 5: Probe Functional Description

    PROBE FUNCTIONAL DESCRIPTION 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 6: Functional Description

    FUNCTIONAL DESCRIPTION Front Panel Rear Panel 1) Liquid Crystal Display (LCD). 2) CAL key, to enter and exit calibration mode. 3) CFM/GLP key, to confirm calibration selection, different setup values or to display Good Laboratory Practice information. 4) ºC key, to manually increase temperature value or other param‑ eters.

  • Page 7: Specifications

    SPECIFICATIONS 0.00 to 45.00 ppm RANGE 0.0 to 300.0% 0.0 to 50.0 ºC (32.0 to 122°F) 0.01 ppm RESOLUTION 0.1% 0.1 °C ±1.5% of full scale or ±1 digit, ACCURACY whichever is greater (@20 °C / 68 °F) ±0.2 ºC (excluding probe error) ±1.5% of full scale Typical EMC Deviation ±0.5 ºC...

  • Page 8: Operational Guide

    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 9 INSTRUMENT START-UP • Turn the instrument on by pressing the ON/OFF switch. • All LCD tags are displayed and a beep is generated while the instru‑ ment performs a self test. • The instrument will display “ ” blinking until initialization is complete.
  • Page 10 SALINITY AND ALTITUDE COMPENSATION If the sample contains significant concentration of salinity or if you are performing measurements at an altitude different from sea level, the read out values must be corrected, taking into account the lower degree of oxygen solubility in these situations (see pages 15‑16). Remember to set the altitude and/or the salinity before taking any DO measurements.

  • Page 11: Do Calibration

    The instrument can be calibrated in maximum 2 points: 0.0% (zero calibration) and 100.0% (slope calibration). The zero calibration of the HI2400 is very stable, therefore this procedure needs to be performed only whenever the probe or the membrane is replaced.
  • Page 12 • Press CAL. The instrument will return to measure‑ ment mode and will memorize the zero calibration data. For a two‑point calibration do not press CAL and follow the procedure below. SLOPE CALIBRATION It is suggested to perform the slope calibration in air. •...

  • Page 13: Good Laboratory Practice (Glp)

    GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the system. All data regarding DO calibration is stored for the user to review when necessary. LAST DO CALIBRATION DATA The last DO calibration data is stored automatically after a successful calibration.

  • Page 14: Setup

    SETUP Setup mode allows viewing and modifying the following parameters: • Salinity Factor • Altitude Factor • Log Interval • Current Time (hour & minute) • Current Date (month, day & year) • Beep Status • Instrument ID • Temperature Unit To enter the Setup mode press SETUP while the instrument is in mea‑...
  • Page 15 Salinity (g/l) at Sea Level ºC ºF 0 g/l 10 g/l 20 g/l 30 g/l 35 g/l 14.60 13.64 12.74 11.90 11.50 32.0 13.81 12.91 12.07 11.29 10.91 35.6 13.09 12.25 11.47 10.73 10.38 39.2 12.44 11.65 10.91 10.22 9.89 42.8 11.83 11.09 10.40 9.75 9.44...
  • Page 16 Altitude, Meters above Sea Level ºC ºF 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4000 0 14.6 14.1 13.6 13.1 12.6 12.1 11.7 11.2 10.8 10.4 10.0 9.7 9.3 9.0 8.9 32.0 2 13.8 13.3 12.8 12.4 11.9 11.5 11.0 10.6 10.2 9.9 9.5 9.2 8.8 8.5 8.4 35.6 4 13.1 12.6 12.2 11.7 11.3 10.9 10.5 10.1 9.7 9.3 9.0 8.7 8.4 8.0 7.9 39.2 6 12.4 12.0 11.5 11.1 10.7 10.3 9.9 9.6 9.2 8.9 8.6 8.2 7.9 7.6 7.5 42.8 8 11.8 11.4 11.0 10.6 10.2 9.8 9.5 9.1 8.8 8.4 8.1 7.8 7.5 7.3 7.2 46.4...
  • Page 17 CURRENT TIME Press CAL when the current time is displayed. The hour and “CFM” tag will start blinking. Press the ARROW keys to change the hour. Press RANGE. The minutes will start blinking. Press the ARROW keys to change the minutes. Press CFM to save the modified value.
  • Page 18 BEEP STATUS Press CAL when the beep status is displayed. The beep status (“ON” or “OFF”) and “CFM” tag will start blinking. Press the ARROW keys to change the beep status. Press CFM to save the modified value or press CAL to escape without saving.

  • Page 19: Logging

    LOGGING This function allows the user to log DO (in ppm or %) together with temperature automatically, for long periods of time. All logged data can be stored into a PC through the USB port. The memory used for storing the logged data is divided in 32 pages. The capacity of each page is 250 samples.
  • Page 20 If the log space is full, the “FULL LOG” message will be displayed and no more data will be saved. Note: When pressing any key that is not active, while lot logging is running, the following message is displayed for a few seconds. VIEW LOGGED DATA Press the RCL key while in measurement mode to retrieve the stored information.
  • Page 21 • The date on the primary LCD, along with “DATE”, month and day tags. • The salinity on the primary LCD and “SAL” message on the secondary LCD. • The altitude on the primary LCD and “ALt” message on the secondary LCD.

  • Page 22: Temperature Calibration (For Technical Personnel Only)

    If the temperature measurements are not accurate, temperature recali‑ bration should be performed. For an accurate recalibration, contact your local Hanna Instruments Office, or follow the procedure below. • Prepare a vessel containing ice and water and another one containing hot water (at a temperature of around 50 °C).
  • Page 23 • Submerse the DO probe in the second vessel as near as possible to the reference thermometer. Allow a few seconds for the probe to stabilize. • Use the ARROW keys to set the reading on the secondary LCD to that of the hot water. •...

  • Page 24: Pc Interface

    USB socket and the other to the USB port of your PC. To allow our users access to the latest version of Hanna Instruments PC compatible software, we made the products available for download at http://software.hannainst.com.
  • Page 25 The instrument will answer for these commands with: <STX> <answer> <ETX> where: <STX> is 02 ASCII code character (start of text) <ETX> is 03 ASCII code character (end of text) <answer>: <ACK> is 06 ASCII code character (recognized command) <NAK> is 21 ASCII code character (unrecognized com‑ mand) <CAN>...
  • Page 26 Requests the instrument’s model name and firmware code (16 ASCII chars). Requests the calibration data record. The answer string contains: • GLP status (1 char): represents a 4 bit hexadecimal encoding. • 0x04 ‑ DO calibration available • DO calibration data (if available), which contains: •...
  • Page 27 GLDxxxfff: Requests the records of the “xxx” lot number. The records are sent in frames of 10 records; “fff” is the frame number (01 first frame). (Example: Lot 13 has 53 records. The records will be sent in 6 frames, 5 with10 records and 1 with 3 records.) Command Parameters: xxx ‑...

  • Page 28: Probe And Membrane Maintenance

    PROBE AND MEMBRANE MAINTENANCE The oxygen probe body is made of reinforced plastic for maximum durability. A thermistor temperature sensor provides temperature measurements of the sample. Use the protective probe cap when not in use. To replace the membrane or refill with electrolyte, proceed as follows: •...

  • Page 29: Troubleshooting Guide

    Important In order to have accurate and stable measurements, it is important that the membrane surface is in perfect condition. This semipermeable membrane isolates the sensor elements from the environment but allows oxygen to enter. If any dirt is observed on the membrane, rinse carefully with distilled or deionized water.

  • Page 30: Accessories

    ACCESSORIES HI7040M Zero Oxygen Solution, 230 ml HI7040L Zero Oxygen Solution, 500 ml Refilling Electrolyte Solution, 30 ml HI7041S HI710005 115VAC to 12VDC converter HI710006 230VAC to 12VDC converter HI76407/2 Spare probe with 2 meters (6.7’) cable HI76407/10 Spare probe with 10 meters (33’) cable HI76407/20 Spare probe with 20 meters (67’) cable HI76407A/P 5 spare membranes Electrode holder...
  • Page 31 WARRANTY HI2400 is guaranteed for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. Electrodes and probes are guaranteed for six months. This warranty is limited to repair or replacement free of charge.
  • Page 32 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com Printed in ROMANIA MAN2400 06/19...

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