Related Manuals for JUMO 202710
Summary of Contents for JUMO 202710
- Page 1 Hand-held Meter, for analytical measurement variables pH, redox, temperature Type 202710 and Type 202720 B 20.2710.0 Operating Instructions 2010-11-08/00461261...
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Page 3: Table Of Contents
Contents Typographical conventions ............5 Warning signs ....................5 Note signs ....................5 General ..................6 Preface ......................6 Safety notes ....................6 Display ......................7 Controls ......................8 Connections ....................9 Configuration ................10 Select measurement function: pH / redox mV / redox mV / rH / thEr ..10 Select 2- or 3-point calibration (only for pH measurement) .......11 Select temperature unit (°C / °F) ..............11 Set temperature offset ................11... - Page 4 Contents Error and system messages ..........24 The pH combination electrode ..........26 pH combination electrodes for various application areas ......26 Cleaning .....................27 Operating life ....................27 General handling of pH combination electrodes ........27 The redox combination electrode ......... 29 General handling ..................29 Technical data .................
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Page 5: Typographical Conventions
1 Typographical conventions Warning signs Danger This symbol is used when there may be danger to personnel if the instructions are ignored or not followed correctly! Caution This symbol is used when there may be damage to equipment or data if the instructions are ignored or not followed correctly! Note signs Note... -
Page 6: General
2 General Preface Please read these operating instructions before commissioning the instrument. Keep the manual in a place that is accessible to all users at all times. Safety notes This device has been built and tested in accordance with the safety regulations for electrical instruments. -
Page 7: Display
2 General Display mbar AL Logg (5) (6) (7) (1) Main display: pH value, redox value (mV, mV ), rH value or operator prompting. (2) Display elements to represent minimum / maximum / stored measurement (HOLD). (3) Display of the unit of measurement. (4) Warning signal: to indicate a low battery or need for recalibration. -
Page 8: Controls
2 General Controls (10) (11) (12) Store Menu Quit (14) (13) (10) On/off switch (11) min / max or “up” / “down” During measurement: - press briefly: displays the minimum or maximum value measured up to now. - press for 2 seconds: deletes the corresponding value. -
Page 9: Connections
2 General Connections (20) (21) (22) (20) This socket has no function. Please do not connect any equipment here. (21) BNC socket: Connection for pH or redox combination electrode. (22) Mini-DIN socket: Connection for a Pt100 temperature sensor (4-wire connection). A 2-wire connection is possible, but there will be an additional measurement error, depending on the lead length. -
Page 10: Configuration
3 Configuration Start Press the key for 2 seconds, Menu configuration this calls up the configuration. Select Briefly press the key. Menu parameter Adjust Press the key or the key. parameter Store Press the Quit configuration configuration is closed and the changes are saved. Select measurement function: pH/redox mV/redox mV /rH/thEr... -
Page 11: Select 2- Or 3-Point Calibration (Only For Ph Measurement)
3 Configuration Select 2- or 3-point calibration (only for pH measurement) Start configuration. Select the parameter “CAL”. Use the key to select the type of calibration. mbar AL Logg 2-Pt: 2-point calibration. The calibration of the pH combination electrode is carried out for two points (one point in the neutral range, and one point in the acidic or alkaline range). -
Page 12: Set Automatic Power-Off
3 Configuration Use the key to set the temperature shift (offset). AL Logg -10.0°C to +10.0°C The zero point for temperature measurement can be shifted by this amount, to compensate for probe or -18.0°F to +18.0°F measurement deviations. Measured temperature minus offset = displayed temperature. -
Page 13: Manual Temperature Setting For Operation Without A Temperature Sensor
3 Configuration Manual temperature setting for operation without a temperature sensor For precise measurement of pH, mV or rH, the hand-held meter must know the temperature of the medium being measured. The ideal solution is temperature measurement by a Pt100 temperature sensor connected to the hand-held meter. - Page 14 3 Configuration Use the key to set the pH value. mbar AL Logg 0.00 — 14.00: Setting range for manual entry of the pH value. Store Confirm the entry with the key. Quit The hand-held meter now switches back to measurement mode.
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Page 15: Calibrating A Ph Combination Electrode
Calibration requires buffer solutions that have a precise pH value. A buffer solution from the - standard series (4.00 pH, 7.00 pH) JUMO standard buffer solutions - DIN series (1.68 pH (A), 4.01 pH (C), 6.87 pH (D), 9.18 pH (F) and 12.45 pH (G)) -
Page 16: Start
4 Calibrating a pH combination electrode Start A long press on the key is used to switch between various buffer series. Buffer solutions can be obtained from laboratory suppliers. Standard series mbar neutral calibration solution 7.00 pH AL Logg Values at 25°C 4.00 pH 7.00 pH DIN series... -
Page 17: With A Temperature Sensor
4 Calibrating a pH combination electrode With a temperature sensor Calibration Immerse the combination electrode and the temperature sensor in the first point 1 buffer solution, and stir. When the display has stopped blinking mbar and the “OK” arrow appears at bottom left, the measurement is stable. -
Page 18: Without Temperature Sensor
4 Calibrating a pH combination electrode bottom left, the measurement is stable. Store Press the key to accept the measurement. Quit The 3-point calibration has now been successfully concluded, and the state of the combination electrode will be displayed, see Chapter 4.5 “Display of the electrode state”, page 20. - Page 19 4 Calibrating a pH combination electrode Rinsing Rinse the combination electrode with de-ionized (distilled) water and dry off. If 2-point calibration was selected, this has now been successfully concluded, and the state of the combination electrode will be displayed, see Chapter 4.5 “Display of the electrode state”, page 20.
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Page 20: Display Of The Electrode State
4 Calibrating a pH combination electrode Display of the electrode state The state of the pH combination electrode will be displayed for approx. 3 seconds after every calibration. Briefly press the key. The state of the pH combination electrode will be displayed for approx. 3 seconds. - Page 21 4 Calibrating a pH combination electrode Show slope at Briefly press the key again. 25°C mbar Slope -52.9 mV/pH AL Logg Permissible -62 to -45 mV/pH range Optimum -59.2 mV/pH After the 2-point calibration, the slope (SL.) for the entire range will be shown. After the 3-point calibration, the slope shown first is that for the acidic range (SL.
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Page 22: Measuring Rh
5 Measuring rH The rH value for a medium is calculated from the measured pH, redox and temperature of the liquid. For this measurement, special care should be taken that both the pH and redox combination electrodes are in a perfect state, and that they are calibrated and thoroughly cleaned and dried before making the measurement. -
Page 23: Manual Determination Of The Rh Value
5 Measuring rH Manual determination of the rH value The measurements for temperature and pH can also be manually entered in the hand-held meter. Connect the redox combination electrode to the hand-held meter and immerse it in the medium to be measured. Briefly press the key. -
Page 24: Error And System Messages
6 Error and system messages Error or Cause Remedy system message General: Low battery voltage. Fit a new battery. Functionality can only be ensured for a short time. Low battery voltage. Fit a new battery. Operating from electrical supply: Check power supply and replace if wrong voltage. - Page 25 6 Error and system messages Error or Cause Remedy system message The last calibration was invalid. Repeat calibration. The old calibration data have To deactivate this warning: Press the CAL been retained. key and keep pressed while the hand-held meter is switched off and on again. Only for pH calibration: The neutral buffer is not Clean the combination electrode.
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Page 26: The Ph Combination Electrode
Application area pH combination electrode: Version / Type / Sales No. (TN) Drinking water monitoring, aquaria, fish-farming, JUMO ecoLine pH, 2 m fixed connecting sea and lake water, etc. cable and BNC connector Type 201005/65-18-45-2000-76-120/837 TN 20/00417300... -
Page 27: Cleaning
7 The pH combination electrode Industrial and municipal wastewater, electroplating, JUMO ecoLine pH, 2 m fixed connecting painting, general contaminated media, etc. cable and BNC connector 201030/51-10-07-40-2000-76-120/052, TN 20/00532380 Cleaning The ion-sensitive glass membrane of the combination electrode can be rinsed under lukewarm water. - Page 28 - check the combination electrode for air bubbles. - check the function with a second reference combination electrode. - replace the combination electrode. - Solutions for calibration, cleaning and activation can be obtained from JUMO or from laboratory suppliers.
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Page 29: The Redox Combination Electrode
(Ag/AgCl) reference system! If a different type is used, the mV measurement function will produce false measurements! JUMO ecoLine Rd, 2 m fixed connecting cable and BNC connector Type: 201010/54-22-65-2000-76-120/000 Sales No. 20/00424950 General handling - Store in a dry room at a temperature between 10°C and 30°C. -
Page 30: Technical Data
9 Technical data Display Temperature: -100.0 to +250°C or -148.0 to +482.0°F ranges 0.00 to 14.00 pH Redox (ORP): -1999 to +2000 mV 0.0 to 70.0 rH Resolution Temperature: 0.1°C or 0.1°F 0.01 pH Redox (ORP): 1 mV 0.1 rH Measurement Temperature: ±0.2°C (-20 to 80°C), otherwise ±0.4°C... - Page 31 -62 to -45 mV/pH - Sensor weighting (10 to 100%) according to the calibration results. Recommended Reference system: Ag/AgCl, electrolyte: KCl, 3 mol/liter redox JUMO ecoLine Rd, 2 m fixed connecting cable and BNC connector combination Type: 201010/54-22-65-2000-76-120/000 electrodes Sales No. 20/00424950 (use only this type for conversion to the hydrogen system “mV...