Hanna Instruments HI2221 Instruction Manual
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Hanna Instruments HI2221 Instruction Manual

Ph/mv/c bench meters with calibration check
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Instruction Manual
HI2221 - HI2223
pH/mV/ºC
Bench Meters
with Calibration Check
www.hannainst.com
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Summary of Contents for Hanna Instruments HI2221

  • Page 1 Instruction Manual HI2221 - HI2223 pH/mV/ºC Bench Meters with Calibration Check 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 FUNCTIONAL DESCRIPTION .............5 HI2221 SPECIFICATIONS ...............6 HI2223 SPECIFICATIONS ...............7 OPERATIONAL GUIDE ..............8 pH CALIBRATION .................10 ENHANCED CALIBRATION MESSAGES ..........14 ELECTRODE CONDITION AND ELECTRODE RESPONSE TIME ....16 pH BUFFER TEMPERATURE DEPENDENCE ........17 GOOD LABORATORY PRACTICE (GLP) ..........18...

  • Page 4: Preliminary Examination

    Other features include: up to five pH point calibration with seven mem‑ orized buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45 pH), logging up to 100 samples (for HI2221) and 500 samples (for HI2223), GLP, calibration due alarm, pH reading with manual or automatic...

  • Page 5: 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, different values or to display Good Laboratory Practice information. 4) °C key, to manually increase temperature value or other parameters.

  • Page 6: Hi2221 Specifications

    HI2221 SPECIFICATIONS –2.00 to 16.00 pH ±699.9 mV Range ±2000 mV –20.0 to 120.0 °C (‑4.0 to 248.0 °F) 0.01 pH 0.1 mV (±699.9 mV) Resolution 1 mV (±2000 mV) 0.1 °C ±0.01 pH Accuracy ±0.2 mV (±699.9 mV) @ 20 °C/68 °F ±1 mV (±2000 mV)

  • Page 7: Hi2223 Specifications

    HI2223 SPECIFICATIONS –2.00 to 16.00 pH –2.000 to 16.000 pH Range ±999.9 mV ±2000 mV –20.0 to 120.0 °C (‑4.0 to 248.0 °F) 0.01 pH 0.001 pH Resolution 0.1 mV (±999.9 mV) 1 mV (±2000 mV) 0.1 °C ±0.01 pH ±0.002 pH Accuracy ±0.2 mV (±999.9 mV)

  • Page 8: Operational Guide

    Hanna Instruments P type (PIN) electrodes are used. If the electrode is not recognized as a Hanna Instruments P type electrode, the bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full bar graph).
  • Page 9 probe approximately 3 cm (1¼”) into the sample to be tested and stir gently. Allow time for the electrode to stabilize. • The pH is displayed on the primary LCD and the temperature on the secondary LCD. • The pH reading is out of range, the closest full‑scale value will be displayed blinking on the primary LCD.

  • Page 10: Ph Calibration

    Pretreatment solutions are available to condition the electrode and speed up the response time. • The instrument automatically defaults to the mV measurement mode if Hanna Instruments P type ORP electrode is detected. • Submerse the ORP electrode tip (3 cm (1¼”) into the sample. Allow a few minutes for the reading to stabilize.
  • Page 11 PROCEDURE Calibration can be performed up to five points. For accurate measurements a three point calibration is recommended. Calibration can be performed using the seven memorized buffers: • pH1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45. FIVE-POINT CALIBRATION For most applications it is recommended that pH7.01 or 6.86 buffers be used as the first calibration point and pH4.01 (for acidic samples) or pH9.18/10.01 (for alkaline samples) as the second calibration point.
  • Page 12 • When the reading is stable and close to the selected buffer, the “CFM” tag will blink and if enabled, an audible signal will sound. • Press the CFM key to confirm the calibration. The calibrated value will be displayed on the primary LCD and the second expected buffer value on the secondary LCD.
  • Page 13 • When the reading is stable and close to the selected buffer the “CFM” tag will blink. • Press CFM to confirm calibration. • After the fourth calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into the next buffer solution and stir gently.

  • Page 14: Enhanced Calibration Messages

    ENHANCED CALIBRATION MESSAGES The stored calibration history is used to issue error and warning messages during calibration to help ensure the highest accuracy. As electrode aging is normally a slow process, substantial changes from previous calibrations are likely due to a temporary problem with the electrode or buffers.
  • Page 15 Replace the electrode. BUFFER TEMPERATURE This message appears if the temperature of the buffer is outside the defined buffer temperature range. WARNING MESSAGES During calibration, the Calibration Check feature analyzes the electrode calibration history and warns the user when problems have been detected. It is possible to override the warning messages and confirm the calibration but it is not recommended.

  • Page 16: Electrode Condition And Electrode Response Time

    ELECTRODE CONDITION AND ELECTRODE RESPONSE TIME When using an appropriate Hanna Instruments P Type BNC electrode with pin, HI2221 and HI2223 will assess electrode condition and response time during each calibration, the calibration status is displayed for the rest of the day.

  • Page 17: Ph Buffer Temperature Dependence

    pH BUFFER TEMPERATURE DEPENDENCE The temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. During calibration the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature. TEMP pH BUFFERS °C...

  • Page 18: Good Laboratory Practice (Glp)

    GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows the storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding the last calibration is stored for the user to review when necessary. EXPIRED CALIBRATION These instruments allow the user to set the number of days before the next required calibration.
  • Page 19 • The pH calibration offset. • The pH calibration slope in mV/pH normalized to 25 °C (the per‑ centage is referred to the ideal value of 59.16 mV/pH). Note: If you calibrate using electrodes with pin, the electrode condition and response gauges appear while the offset and slope are displayed.
  • Page 20 • If “no bUF” message appears on the LCD, the instrument informs you that the calibration was performed with less than five buffers. • Calibration Expiration status: ‑ if disabled, ‑ or the number of days until the calibration alarm will be displayed, ‑...

  • Page 21: Logging

    LOGGING Up to 100 (HI2221) or 500 (HI2223) logged samples can be stored in memory. LOGGING THE CURRENT DATA To store the current reading into memory, press the LOG key while in measuring mode. The instrument will display the current date (mm.dd) on the primary LCD, the record number on the secondary LCD and the “LOG”...
  • Page 22 Press the RCL key to return to measurement mode. Use the ARROW keys to scroll through the stored records: Press the RANGE key to view additional data: • The mV value on the primary LCD and the temperature on the secondary LCD.
  • Page 23 Press the ARROW keys to change the selected record. To delete all records, press the SETUP key, “ALL” tag will appear on the secondary LCD. Press the CFM key to confirm the deleting of the selected record, or all records. Instrument will display on the primary LCD the “nuLL” message. Notes: •...

  • Page 24: Setup

    SETUP Setup mode allows viewing and modification of the following parameters: • Calibration Expiration Alarm • One‑point Calibration Behavior • pH Resolution (HI2223 only) • Current Time (hour & minute) • Current Date (year, month & day) • Beep Status •...
  • Page 25 Press CFM to save the behavior for one‑point calibration. Press CAL to escape without saving. pH RESOLUTION (HI2223 only) Press CAL when “rESo” message is displayed on the secondary LCD. The set resolution (“0.01” or ”0.001”) and “CFM” will start blinking. Press the ARROW keys to toggle between 0.01 and 0.001 options.
  • Page 26 Press the RANGE key. The day and “CFM” will start blinking. Press the ARROW keys to change the day. Press the CFM key to save the modified value or press the CAL key to escape without saving. BEEP STATUS Press CAL when the beep status is displayed. Beep status (“On” or “OFF”) and “CFM”...

  • Page 27: Temperature Calibration (For Technical Personnel Only)

    If the temperature measurements are inaccurate, temperature recalibra‑ tion should be performed. For an accurate recalibration, contact your local Hanna Instruments, or follow the instructions below. • Prepare a vessel containing ice and water and another one containing hot water (around 50 ºC).
  • Page 28 • When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink. • Press CFM to confirm. The instrument returns to measurement mode. Note: If the reading is not close to the selected calibration point, “WRONG”...

  • Page 29: Mv Calibration (For Technical Personnel Only)

    If the mV measurements are inaccurate, mV recalibration should be performed. For an accurate recalibration, contact your local Hanna Instruments Office. A two‑point calibration can be performed at 0.0 mV and 1800.0 mV. • Attach to the BNC connector a mV simulator with an accuracy of ±0.1 mV.

  • Page 30: Pc Interface

    Make sure that your instrument is switched off and plug one connector to the instrument’s 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 31 • 0x02 ‑ new SETUP parameter • Reading status (2 chars): R ‑ in range, O ‑ over range, U ‑ under range. First character corresponds to the pH range reading. (Not for Hanna Instruments ORP electrodes with pin.) Second character corresponds to mV reading.
  • Page 32 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. • 0x01 ‑ pH calibration available • pH calibration data (if available), which contains: •...
  • Page 33 Requests the number of logged samples (4 chars). LODxxx Requests the xxx record logged data. LODALL Requests all Log on demand data. The answer string contains: • pH resolution (2 chars): 00 ‑ pH0.001 resolution, 01 ‑ pH0.01 resolution • pH reading status (1 char): R ‑ in range, O ‑ over range, U ‑ under range •...

  • Page 34: Electrode Conditioning And Maintenance

    ELECTRODE CONDITIONING AND MAINTENANCE PREPARATION PROCEDURE Remove the protective cap of the pH electrode. DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes. They will disappear when rinsed with water. During transport, tiny bubbles of air may form inside the glass bulb affect‑ ing proper functioning of the electrode.
  • Page 35 For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add HI7082 or HI8082 3.5M KCl Electrolyte Solution for double junction or HI7071 or HI8071 3.5M KCl+AgCl Electrolyte Solution for single junction electrodes. For faster response, unscrew the fill hole screw during measurements.
  • Page 36 CLEANING PROCEDURE • General Soak in Hanna Instruments HI7061 or HI8061 General Cleaning Solution for approximately ½ hour. • Protein Soak in Hanna Instruments HI7073 or HI8073 Protein Cleaning Solution for 15 minutes. • Inorganic Soak in Hanna Instruments HI7074 Inorganic Cleaning Solution for 15 minutes.

  • Page 37: Troubleshooting Guide

    TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response/ Dirty pH electrode. Clean the electrode and excessive drift. then soak the tip in HI7061 or HI8061 for 30 minutes. Readings fluctuate Clogged/dirty junc‑ Clean the electrode. up and down tion. Low electrolyte Refill with fresh solution (for (noise).

  • Page 38: Temperature Correlation For Ph Sensitive Glass

    The pH at which the interference starts to be significant depends upon the composition of the glass. This interference is called alkaline error and causes the pH to be underestimated. Hanna Instruments’ glass formulations have the indicated characteristics. Sodium Ion Correction for the Glass at 20-25 °C...

  • Page 39: Accessories

    ACCESSORIES pH BUFFER SOLUTIONS HI70004P pH4.01 Buffer Sachets, 20 mL, 25 pcs. HI70007P pH7.01 Buffer Sachets, 20 mL, 25 pcs. HI70010P pH10.01 Buffer Sachets, 20 mL, 25 pcs. HI7001L pH1.68 Buffer Solution, 500 mL HI7004L pH4.01 Buffer Solution, 500 mL HI7006L pH6.86 Buffer Solution, 500 mL HI7007L pH7.01 Buffer Solution, 500 mL HI7009L pH9.18 Buffer Solution, 500 mL...
  • Page 40 pH ELECTRODES All electrodes with part numbers ending in P are supplied with a BNC and pin connector and 1 m (3.3’) cable, as shown below. HI1043P; Use: strong acid/alkali. Glass‑body, double junction, refillable, combination pH electrode. HI1053P; Use: emulsions. Glass‑body, triple ceramic, conic shape, refillable, combination pH electrode.
  • Page 41 ORP ELECTRODES HI3131P; Use: titration. Glass‑body, refillable, combination platinum ORP electrode. Consult the Hanna Instruments General Catalog for more electrodes with BNC and pin connectors. EXTENSION CABLE FOR SCREW-TYPE ELECTRODES (SCREW TO BNC ADAPTER) HI7855/1 Extension cable 1 m (3.3’) long HI7855/3 Extension cable 3 m (9.9’) long...
  • Page 42 OTHER ACCESSORIES Voltage adapter from 115 VAC to 12 VDC HI710005 (USA plug) Voltage adapter from 230 VAC to 12 VDC HI710006 (European plug) Voltage adapter from 240 VAC to 12 VDC HI710012 (UK plug) Voltage adapter from 230 VAC to 12 VDC HI710013 (South African plug) Voltage adapter from 230 VAC to 12 VDC...
  • Page 43 For yours and the meter's safety do not use or store the meter in hazardous environments. WARRANTY HI2221 and HI2223 are guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The electrodes and the probes are guaranteed for a period of six months.
  • Page 44 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com MAN2223 06/19 Printed in ROMANIA...

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Hi2223

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