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Omega PHB21 User Manual

Portable ph/mv meter
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PHB21
Portable pH/mV Meter

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Summary of Contents for Omega PHB21

  • Page 1 PHB21 Portable pH/mV Meter...

  • Page 3: Table Of Contents

    Instruction Manual Portable pHmeter PHB21 Index Specifications ............. . . 2 PH Measurement.

  • Page 4: Specifications

    2. Specifications Range -2,00 to 20,00 pH Resolution 0.1 / 0.01 pH Relative Precision 0.01 % (full scale) Range ± 1999 mV Resolution 1 mV Relative Precision 0.05 % (full scale) Temperature Range 20 to 120 ºC Resolution 0.1 ºC Relative Precision 0.08% (full scale) General...

  • Page 5: Ph Measurement

    3. PH Measurement Stable chemical compounds, are electrically neutral when mixed with water. In order to form a water solution, dismember in positive or negative charged particles. These charged particles are called "i ”. When we apply differential potential in two electrodes immersed in a solution, it is possible to verify that positive ions (H , Na and more) will migrate to the negative terminal, that is why we call them cations.
  • Page 6 3. PH Measurement (cont.) At 25°C the "K" dissociation of water has a value of 10 where we can take (EQ-1) that is the activity product (aH+) by (aOH-) is equal to ion OH-, the solution is neutral and activities of H+ and OH- must be both of 10 mols / L. If a strong acid, such as HCl, is added to water, many ions H+ are added;...
  • Page 7 3. PH Measurement (cont.) Electrode Description pH sensing Bulb - rugged construction, in order to avoid ease breakage. Glass Body - chemically inert. Punctual Ceramic Seal - ease operation for electrolyte solution filling. Low Noise Cable - assuring stable readings.. Polypropylene Cap - chemically aggressively resistant.
  • Page 8 The KCl is a neutral salt, so does not interfere at the pH value. It can be used to raise the conductivity at the sample, in case we Are measuring a weak electrolyte. Supplied in 475ml Bottles (other volumes upon request) OMEGA offers the following Buffer Solutions: PHA-4 4.01pH PHA-7 7.00pH...

  • Page 9: Mv Measurement

    4. MV Measurement Oxide Redox Potential Measurement In order to measure potential redox it is used metallic electrodes, generally Platinum or Silver. This type of electrode refers to chemical reactions in solutions that operate only by electrons transference. Such reactions occur with composed elements presenting two or more oxidizing stages.

  • Page 10: Parts Description

    5. Parts Description Items Description 1 -Display: Alphanumeric 2 Lines x 16 characters 2 -Membrane Keyboard 3 - Battery Lid cover 4 - Serial Output RS-232 5 - Protection lids for field protection usage 6 - AC Adapter output 7 - BNC Connector: pH Electrode Inlet 8 -BNC Connector: Thermocompensator Inlet...

  • Page 11: Equipment Operation

    6. Equipment Operation To turn ON the equipment, press and hold <ENTER> key. Make sure the power cord is plugged correctly! The menus are self-explanation with it’s respective options, selected by pressing the <SELECT> key. After making your selection(flashing option), using <SELECT>...
  • Page 12 6. Equipment Operation (cont.) IMPORTANT INFORMATION 1 - In case you want to quit Reading operation, press and hold <ESCAPE> key for about 5 seconds in order to be recognized by the equipment. This time is necessary to certify the user desires to quit this mode.
  • Page 13 <ENTER> . The display will show the following menus until reached the Main Menu. Press <ENTER> key to turn if on OMEGA PHB21 - V1.0 ============ Program performs electronic check SELECT FUNCTION Main Menu mV ºC Return to prior menu for data modification and to reach the Select the menu option.

  • Page 14: Equipment Operation Ph - Set Up

    6.1. Equipment Operation pH - Set Up Press <SELECT> key until option flashes, then SELECT FUNCTION press <ENTER> key to confirm the option chosen. mV ºC pH: READ / Press <SELECT> key until option Set Up flashes, then press <ENTER> key to confirm the option chosen.
  • Page 15 6.1. Equipment Operation pH - Set Up (cont.) From page 12 User can program the display to show information like DISPLAY? Barr graph, Keyboard Beep, Stability Beep and more. User can choose if desire to have Barr graph shown BARGRAPH? above the Reading screen.

  • Page 16: Equipment Operation Ph - Calibrate

    6.2. Equipment Operation pH - Calibrate SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. mV ºC READ Press <SELECT> key until option Read flashes, then press <ENTER> key to confirm the option chosen. SET UP/CHECK pH: READ / Press...

  • Page 17: Equipment Operation Ph - Read

    6.3. Equipment Operation pH - Read Press <SELECT> key until option flashes, then SELECT FUNCTION press <ENTER> key to confirm the option chosen. mV ºC READ Press <SELECT> key until option Read flashes, then press <ENTER> key to confirm the option chosen. SET UP/CHECK READ Press...

  • Page 18: Equipment Operation Ph - Check

    CHEK SOLUTION READY? <ENTER> ELECTRODE HIGH ISO<ENTER> Sensitivity above 90% - Very Good Sensitivity below 90% and above 80% - Good WASH ELECTRODE Sensitivity below 80% - Bad w/THIOUREA & PEPSIN PERSISTING BAD CONTACT OMEGA CUSTOMER SERVICE (800) 872-9436 <ENTER>...

  • Page 19: Equipment Operation Ph - Register

    6.5. Equipment Operation pH - Register Perform this function if user desires to store the results while Reading SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. mV ºC READ Press <SELECT> key until option Read flashes, then...
  • Page 20 6.5. Equipment Operation pH - Register (cont.) Perform this function if user desires to earse all data stored SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. mV ºC READ Press <SELECT> key until option Read flashes, then...

  • Page 21: Equipment Operation Mv - Set Up

    6.6. Equipment Operation mV - Set Up SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. ºC mV: READ / Press <SELECT> key until option Set Up flashes, then press <ENTER> key to confirm the option chosen. SET UP /CHECK PASSWORD...
  • Page 22 6.6. Equipment Operation mV - Set Up (cont.) From Page 20 DISPLAY? User can program the display to show information like Barr graph, Keyboard Beep Stability Beep and more. User can choose if desire to have Barr graph shown BARGRAPH? above the Reading screen.

  • Page 23: Equipment Operation Mv - Calibrate

    6.7. Equipment Operation mV - Calibration SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. ºC READ Press <SELECT> key until option Read flashes, then press <ENTER> key to confirm the option chosen. SET UP/CHECK mV: READ / Press...

  • Page 24: Equipment Operation Mv - Read

    6.8. Equipment Operation mV - Read SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. ºC READ Press <SELECT> key until option Read flashes, then press <ENTER> key to confirm the option chosen. SET UP/CHECK READ Press...

  • Page 25: Equipment Operation Mv - Check

    PLACE ELECTRODE Sensibility below 90% and above 80% - Good Sensibility below 80% - Bad SOL.228mV @ 25ºC ============ ==== CHECK RESULT BAD ELECTRODE <ENTER> PLACE ELECTRODE IN 30% HCl FOR 30s PERSISTING BAD CONTACT OMEGA CUSTOMER SERVICE (800)872-9436 <ENTER>...

  • Page 26: Equipment Operation Mv - Register

    6.10. Equipment Operation mV - Register Perform this function if user desires to store the results while Reading SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. ºC READ Press <SELECT> key until option Read flashes, then SET UP/CHECK...
  • Page 27 6.10. Equipment Operation mV - Register (cont.) Perform this function if user desires to consult the results stored SELECT FUNCTION Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. ºC READ Press <SELECT> key until option Read flashes, then press...

  • Page 28: Equipment Operation ºc - Set Up

    6.11. Equipment Operation ºC - Set Up SELECT FUNCTION ºC Press <SELECT> key until option flashes, then ºC press <ENTER> key to confirm the option chosen. ºC: READ / Press <SELECT> key until option Set Up flashes, then press <ENTER> key to confirm the option chosen.
  • Page 29 6.11. Equipment Operation ºC - Set Up (cont.) From Page 27 DISPLAY? User can program the display to show information like Barr graph, Keyboard Beep Stability Beep and more. BARGRAPH? User can choose if desire to have Barr graph shown above the Reading screen.
  • Page 30 6.11. Equipment Operation ºC - Set Up (cont.) From Page 28 ATC CHANGE? If user is changing or adding a Thermo to the instrument, it is necessary to adjust the temperature of the probe with the instrument. CONFIRM? If changing or adding a Themo, choose , then choose again to confirm.

  • Page 31: Equipment Operation ºc - Read

    6.12. Equipment Operation ºC - Read SELECT FUNCTION ºC Press <SELECT> key until option flashes, then press <ENTER> key to confirm the option chosen. pH mV ºC Press <SELECT> key until option Read flashes, then ºC: READ / SET UP press <ENTER>...

  • Page 32: Equipment Operation Turning Off

    Equipment Operation - Turning Off 6.13. While during Read Mode, user must press and hold <ESCAPE> and the Select Function Menu will be displayed. Press <ESCAPE> key and user will be guided to the Switching Off Screen. Reading display, when the bargraph function was not chosen durign Set Up Mode.

  • Page 33: Electrode Type Ph

    7. PH Electrode Type Electrode Description pH sensing Bulb - rugged construction, in order to avoid ease breakage. Glass Body - chemically inert. Punctual Ceramic Seal - ease operation for electrolyte solution filling. Low Noise Cable - assuring stable readings.. Polypropylene Cap - chemically aggressively resistant.

  • Page 34: Maintenance

    8. Maintenance CLEANING: CONSIDERATIONS: CONSIDERATIONS:...
  • Page 35 Maintenance (cont.) 1 - For storage purpose, electrodes must be immerged at the same electrolyte’s reference, with hole(9) closed. 2 - In order to avoid mistakes during readings, the membrane (1) and the diaphragm (3), must be always clean. 3 -For cleaning, wash the electrode with commercial detergent using your fingers to clean the bulb, rinse it with distilled water.

  • Page 36: Communication Cables

    Communication Cable...
  • Page 38 M-4507/0908...

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