Delta OHM HD2305.0 User Manual
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Delta OHM HD2305.0 User Manual

Ph meter - thermometer
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REV. 1.3
th
Nov., 10
2005
HD2305.0
Our instruments' quality level is the results of the product continuous development. This
can bring about differences between the information written in this manual and the
instrument that you have purchased. We cannot entirely exclude errors in the manual, for
which we apologize.
The data, figures and descriptions contained in this manual cannot be legally asserted. We
reserve the right to make changes and corrections without prior notice.

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Summary of Contents for Delta OHM HD2305.0

  • Page 1 REV. 1.3 Nov., 10 2005 HD2305.0 Our instruments' quality level is the results of the product continuous development. This can bring about differences between the information written in this manual and the instrument that you have purchased. We cannot entirely exclude errors in the manual, for which we apologize.
  • Page 2 pH meter - Thermometer HD2305...
  • Page 3 HD2305.0 1. Input for probes, 8-pole DIN45326 connector. 2. pH/mV input, female BNC 3. Battery symbol: displays the battery charge level. 4. Function indicators. 5. Secondary display line. 6. DATA/ENTER key: during normal operation displays the maximum (MAX), the minimum (MIN) and the average (AVG) of current measurements.

  • Page 4: Table Of Contents

    4.1.1 Automatic or manual pH compensation ......................11 4.1.2 How to manually change the temperature ...................... 11 4.2 pH ..........................12 ELECTRODE CALIBRATION 4.2.1 Calibration procedure............................. 12 Temperature characteristics of Delta OHM buffer solutions .................. 14 4.3 Pt100 Pt1000 T ....................15 WIRE EMPERATURE ROBES 4.3.1 Temperature measurement ..........................

  • Page 5: General Characteristics

    1. GENERAL CHARACTERISTICS The pH meter - Thermometer Model HD2305.0 is a portable instrument that allows measurement of pH and redox potential (ORP) in mV. It also measures the temperature using Pt100 or Pt1000 immersion, penetration or contact probes. The electrode calibration can be carried out on one, two or three points at 4.01pH, 6.86pH and 9.18pH.

  • Page 6: Description Of The Functions

    2. DESCRIPTION OF THE FUNCTIONS The keyboard of the pH meter Model HD2305.0 is composed of double-function keys. The function on the key is the "main function", while the one above the key is the "secondary function". When the instrument is in standard measurement mode, the main function is active.
  • Page 7 pH-mV/ESC key The "pH-mV" key has three functions: • pH-mV: pressing this key once switches the display between pH and mV; • ESC: once the MENU has been opened with the DATA+°C/°F keys, the "pH-mV" key will allow to cancel the parameters set using the arrows.
  • Page 8 DATA/ENTER. The display stops blinking, and the temperature displayed is used for compensation. If the temperature probe is not present, to change the unit of measurement between °C and °F, it is necessary to press twice the °C/°F key. • MENU: to access to the menu press simultaneously DATA+°C/°F: the Probe Type will be displayed.

  • Page 9: The Programming Menu

    • 4 wire Pt100 probes • 2 wire Pt1000 probes The probes fitted with SICRAM module, and Delta Ohm Pt1000 probes, are automatically detected by the instrument upon turning on: the Probe Type menu item is configured by the instrument and cannot be modified by the user.

  • Page 10: Probes And Measurements

    The Delta Ohm Pt1000 probes are automatically detected while the direct 4 wire Pt100 temperature probe is not automatically detected by the instrument and must be set up in the Probe type menu item (please see the menu description on chapter 3).

  • Page 11: Automatic Or Manual Ph Compensation

    The pH electrodes must be calibrated using the buffer solutions (see paragraph 4.2 pH electrode calibration). The ORP and specific ion electrodes do not need calibration as their absolute voltage is measured. The ORP (REDOX) buffer solutions are only used to check the quality of an ORP (REDOX) electrode.

  • Page 12: Ph Electrode Calibration

    • During manual compensation, to change the unit of measurement between °C and °F, it is necessary to press twice the °C/°F key. 4.2 pH ELECTRODE CALIBRATION The electrode calibration is used to compensate the zero potential and slope departures to which the electrode is subject with time.
  • Page 13 5) Press DATA/ENTER to proceed with the calibration. The electrode offset mV value (OFFS) is shown on the display for few seconds. After a few seconds the instrument shows the measurement again, corrected according to the new calibration, but remains in calibration mode. Pressed repeatedly the DATA/ENTER key allows the calibration on the point to be repeated, for example, in order to obtain a more stable value.

  • Page 14: Temperature Characteristics Of Delta Ohm Buffer Solutions

    Temperature characteristics of Delta OHM buffer solutions The 3 standard buffers are memorized in the instruments with relevant variations according to temperature: the characteristics of the three Delta Ohm standard buffers at 6.86pH, 4.01pH and 9.18pH (@25°C) are reported below.

  • Page 15: Pt100 And 2 Wire Pt1000 Temperature Probes

    All probes produced by Delta Ohm are provided with a connector. The HD2305.0 instrument also work with direct 4 wire Pt100, and 2 wire Pt1000 probes manufactured by other producers: for the instrument connection is prescribed the TP47 connector to which the probe's wires should be welded.
  • Page 16 5. open the two module shells: the printed circuit to which the probe must be connected is housed inside. On the left there are the 1…4 points on which the sensor wires must be welded. The JP1…JP4 jumpers are in the center of the board. These must be closed with a tin bead for some type of sensors: Not Used Ni1000...

  • Page 17: Direct Connection Of 4 Wire Pt100 Sensors

    4.3.3 Direct connection of 4 wire Pt100 sensors 4 wire Pt100 sensors can be soldered directly Sensor Direct soldering to the connector to the pins of the flying female connector without making use of the TP47 board. The 4 wires of the Pt100 sensors have to be soldered as indicated in the figure on the left.

  • Page 18: Warnings

    5. WARNINGS 1. Do not expose the probes to gases or liquids that could corrode the material of the sensor or the probe itself. Clean the probe carefully after each measurement. 2. Do not bend the probe connectors or force them upward or downward. 3.

  • Page 19: Instrument Signals And Faults

    6. INSTRUMENT SIGNALS AND FAULTS The following table lists all error indications and information displayed by the instrument and supplied to the user in different operating situations: Display indications Explanation >>>_PRBE_TYPE type of probe connected BATT TOO LOW - CHNG NOW battery discharged - replace it immediately BAUDRATE >>>...

  • Page 20: Instrument Storage

    7. INSTRUMENT STORAGE Instrument storage conditions: • Temperature: -25…+65°C. • Humidity: less than 90%RH without condensation. • Do not store the instrument in places where: • humidity is high; • the instrument may be exposed to direct sunlight; • the instrument may be exposed to a source of high temperature; •...

  • Page 21: Low Battery Warning And Battery Replacement

    8. LOW BATTERY WARNING AND BATTERY REPLACEMENT The battery symbol on the display constantly shows the battery charge status. To the extent that batteries have discharged, the symbol "empties". When the charge decreases still further it starts blinking. In this case, batteries should be replaced as soon as possible. If you continue to use it, the instrument can no longer ensure correct measurement.

  • Page 22: Notes About Working And Operative Safety

    9. NOTES ABOUT WORKING AND OPERATIVE SAFETY Authorized use The technical specifications as given in chapter TECHNICAL CHARACTERISTICS must be observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. General safety instructions This measuring system is constructed and tested in compliance with the EN 61010-1 safety regulations for electronic measuring instruments.

  • Page 23: Technical Characteristics

    10. TECHNICAL CHARACTERISTICS 10.1 T – T ECHNICAL INFORMATION ON THE METER HERMOMETER Instrument Dimensions (Length x Width x Height) 140x88x38mm Weight 160g (complete with batteries) Material Display 2x4½ digits plus symbols Visible area: 52x42mm Operating conditions Operating temperature -5…50°C Warehouse temperature -25…65°C Working relative humidity...

  • Page 24: On Line Instrument Probes And Modules Technical Data

    Drift after 1 year 0.1°C/year EMC standard regulations Security EN61000-4-2, EN61010-1 level 3 Electrostatic discharge EN61000-4-2 level 3 Electric fast transients EN61000-4-4 level 3, EN61000-4-5 level 3 Voltage variations EN61000-4-11 Electromagnetic interference susceptibility IEC1000-4-3 Electromagnetic interference emission EN55020 class B 10.2 ON LINE INSTRUMENT PROBES AND MODULES TECHNICAL DATA 10.2.1 Temperature probes Pt100 and SICRAM module Model...

  • Page 25: Order Codes

    4.01pH and 6.86pH buffer solutions, 3 1.5V alkaline batteries, operating manual and case. HD2305.0K The kit is composed of: instrument HD2305.0, TP87 temperature probe, 3 1.5V alkaline batteries, operating manual and case. The electrodes and the solutions must be ordered separately.

  • Page 26: Orp Buffer Solutions Edox

    11.4 ORP B UFFER SOLUTIONS EDOX HDR220 ORP buffer solution (REDOX) 220mV 0.5 l. HDR468 ORP buffer solution (REDOX) 468mV 0.5 l. 11.5 T SICRAM EMPERATURE PROBES COMPLETE WITH MODULE TP87 Pt100 sensor immersion probe. Probe's stem Ø 3 mm, length 70 mm. Cable length 1 metre.

  • Page 28: Serial Number

    WICHTIG: Die Garantie ist nur gültig, wenn dieser Abschnitt bis ins Einzelne ausgefüllt ist. Este certificado debe acompañar al aparato enviado al centro de asistencia. IMPORTANTE: La garantía es válida solo si el presente cupón ha sido completado en su totalidad. HD2305.0 Instrument type Serial number...

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Hd2305

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