GHM Delta OHM HD3405.2 Manual
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GHM Delta OHM HD3405.2 Manual

Temperature-ph meter
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REV. 1.0
31 Jan. 2006
HD3405.2
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 instru-
ment 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 correction without prior notice.

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  • Page 1 REV. 1.0 31 Jan. 2006 HD3405.2 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 instru- ment that you have purchased. We cannot entirely exclude errors in the manual, for which we apologize.
  • Page 2 Temperature-pH meter HD3405.2...
  • Page 3 HD3405.2 1. Connectors. 2. Battery symbol: displays the battery charge level. The symbol does not appear when the ex- ternal power supply is connected. 3. CAL key: it starts the probe the pH electrode calibration. 4. REL key: enables the relative measurement (displays the difference between the current value and the logged value when the key is pressed).

  • Page 4: Introduction

    INTRODUCTION The instrument series HD34… is made up of 4 bench top instruments for electrochemical measures: pH, conductivity, dissolved oxygen, and temperature. The HD3405.2 measures pH and the redox potential (ORP) in mV. It measures the temperature using Pt100 or Pt1000 immersion, penetration or air contact probes. The pH electrode calibration, as well as manual, can be carried out on one, two or three points and the calibration sequence can be chosen from a list of 13 buffers.

  • Page 5: Keyboard And Menu Description

    KEYBOARD AND MENU DESCRIPTION Foreword The instrument keyboard is composed of single-function keys, like the MENU key, and double- function keys such as the LOG/DUMP LOG key. In the double-keys, the function in the upper part is the "main function", while the one in the bottom part is the "secondary function".
  • Page 6 will blink to remind the user that the instrument can only be turned off by pressing the <ON/OFF> key. The automatic turning off function is disabled when external power is used. On the other hand, it cannot be disabled when the batteries are discharged. ENTER key In the menu, the ENTER key confirms the current parameter and then goes to the next one.
  • Page 7 Hold function is enabled, the instrument performs the measurement and when it stabilizes it goes in HOLD mode. To update the display indication, press “pH/mV” (please see the de- scription of the pH/mV key for further explanation). In the following figure you can see an example of the measurement process with the Auto- Hold function enabled.
  • Page 8 8) BUFR_1 (First buffer): selects the value of the first buffer for the pH electrode calibration. The preset buffers are compensated for temperature. The ATC indication is displayed in the lower line. The USER buffer, defined by the user, is not compensated for temperature: to change its value, go to the "SET USER BUFR"...
  • Page 9 case the probe type must be entered manually. Select Probe type using the MENU key and then select the type of probe used with the arrow keys; confirm using ENTER 14) YEAR: to set the current year. Use the arrows to modify this parameter and confirm using ENTER.
  • Page 10 REL key In measurement mode, displays for both measurements - mV and temperature - the difference be- tween the current value and that measured on pressing the key. The REL message appears on the display; press the key again to return to the current measurement. LOG/DumpLOG key In measurement mode, this function starts and stops the logging of a data block to be saved in the instrument's internal memory.
  • Page 11 NOTE: when the Auto-Hold function is enabled, the pH/mV key allows the pH measurement to be relaunched, and the measurement in mV is disabled. To restore the display in mV, disable the Auto-Hold function in the menu. SERIAL/EraseLOG key In measurement mode, this function starts and stops the data transfer to the RS232C serial output. According to the settings entered in the Print and log interval menu item, a single sample can be printed if Print and log interval=0 or a continuous indefinite printing of the measured data can be set up if Print and log interval=1…3600.
  • Page 12 Up Arrow When used in the menu, it increases the current variable value. During measurement, if the tempera- ture probe is not present, it increases the temperature value for pH compensation. Down Arrow When used in the menu, it decreases the current variable value. During measurement, if the tem- perature probe is not present, it decreases the temperature value for pH compensation.

  • Page 13: Ph Measurement

    MEASUREMENT The instrument works with pH measurement electrodes, redox potential measurement electrodes (ORP), and specific ion electrodes. The probes with 4 wire Pt100, 2 wire Pt1000 or Ni1000 sensors may be used for measuring temperature or for the automatic compensation of the Nernst coefficient with the pH electrode.

  • Page 14: Ph Electrode Calibration

    74.04mV T=100°C, 74.04mV/pH 59.16mV T=25°C, 59.16mV/pH 54.20mV T=0°C, 54.20mV/pH -54.20mV -59.16mV -74.04mV When a temperature probe is present, the instrument automatically applies the ATC automatic tem- perature compensation function. To disable it, the temperature probe must be disconnected. If the temperature probe is not present, and the correct value is not entered manually, the extent of the error committed in pH measurement is proportional to temperature and pH value itself.

  • Page 15: Calibration Procedure

    The calibration may be carried out using 1, 2 or 3 points. When using 1 point, the electrode offset is corrected, with 2 points the offset and the gain is corrected; finally, in case a three points calibration is carried out two offsets and two slopes are calculated, the second point is the one in which the zero is performed.
  • Page 16 7) Extract the electrode from the buffer, clean it carefully, and insert it in the following buffer. 8) Press the MENU key . The instrument displays the value detected on the new buffer: continue by repeating the steps from point 3). NOTES: •...

  • Page 17: Temperature Characteristics Of Delta Ohm Buffer Solutions

    Temperature characteristics of Delta OHM buffer solutions The 13 standard buffers reported in the table on page 14 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, 4.01pH e 9.18pH (@25°C) 6.86 pH @ 25°C 4.01 pH @ 25°C °C...

  • Page 18: Direct Input Into Pt100, Pt1000 And Ni1000 Temperature Probes With Tp47 Module

    Pt100, Pt1000 Ni1000 TP47 IRECT INPUT INTO TEMPERATURE PROBES WITH MODULE The instrument accepts the input of Platinum temperature probes with resistances of 100Ω and 1000Ω as well as Nickel temperature probes with a 1000Ω resistance. The Pt100 are connected to 4 wires, the Pt1000 and Ni1000 to 2 wires, with the excitation current chosen minimizing the sensor self-heating effects.
  • Page 19 Do the following to open the module and connect a probe: Unscrew the fairlead and extract the gasket, remove the label using a cutter, unscrew the ring on the opposite side as illustrated in the figure: Open the two module shells: the printed circuit to which the temperature probe must be connected is housed inside.

  • Page 20: Direct Connection Of The 4-Sensor To A Din45326 Connector

    Ensure the welds are clean and perfect. Once the welding operation is complete, close the two shells, insert the gasket in the module, screw the fairlead. At the other end of the module, enter the ring with the O-Ring as indicated in the picture. Make sure the cable is not twisted while you are screwing the fairlead.

  • Page 21: Warnings And Operating Instructions

    WARNINGS AND OPERATING INSTRUCTIONS 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 22 Some of the most frequent problems and their possible solutions are reported below. Wrong pH measurement. Carry out the following checks: Check that the diaphragm is not obstructed and possibly clean it using the HD62PT solution. Check that the reference system is not contaminated and, in case of a filling type electrode, replace the electrolyte with the KCL3M solution (electrodes KP63, KP64 e KP90) or the PROTELYTE solution (electrodes KP61, KP71 e KP80).

  • Page 23: Instrument Signals And Faults

    INSTRUMENT SIGNALS AND FAULTS The following table lists all error indications and information displayed by the instrument and sup- plied to the user in different operating situations. Display indications Explanation This message appears if the pH measurement exceeds the -2.000pH…19.999pH limits, if the mV measurement exceeds the ±2.4V limits, if the temperature probe, already detected by the instru- ment, is disconnected.
  • Page 24 The following table reports the indications provided by the instrument as they appear on the display, together with their description. Display indications Explanation transfer or erase data >>>_LOG_DUMP_or_ERAS >>>_PRBE_TYPE type of probe connected AUTO HOLD automatic function holding the displayed measurement BATT TOO LOW - CHNG NOW battery discharged - replace it immediately baud rate value...

  • Page 25: Low Battery Warning And Battery Replacement

    LOW BATTERY WARNING AND BATTERY REPLACEMENT The battery symbol on the display constantly shows the battery charge status. To the extent that batteries have dis- charged, the symbol "empties". When the charge decreases still further it starts blinking… If you wish to continue using the instrument, remove the flat batteries and supply it using the exter- nal power supply.

  • Page 26: Instrument Storage

    ALFUNCTIONING UPON TURNING ON AFTER BATTERY REPLACEMENT After replacing the batteries, the instrument may not restart correctly; in this case, repeat the opera- tion. After disconnecting the batteries, wait a few minutes in order to allow circuit condensers to discharge completely; then reinsert the batteries. ARNING ABOUT BATTERY USE •...

  • Page 27: Serial Interface And Usb

    SERIAL INTERFACE AND USB The HD3405.2 is fitted with an electrically isolated RS-232C and USB2.0 serial interface. The USB connection requires the previous installation of a driver in the instrument software. Install the driver before connecting the USB cable to the PC (please see the details on page 31). The instrument standard serial transmission parameters are: •...
  • Page 28 Command Response Description & Erase data in flash memory & Sets the unit of measurement for the temperature. n=0 > °C LUAn n=1 > °F & Sets the unit of measurement for the pH. n=0 > pH LUBn n=1 > mV &...

  • Page 29: Storing And Transferring Data To A Pc

    STORING AND TRANSFERRING DATA TO A PC The HD3405.2 instrument can be connected to a personal computer via an RS232C serial port, and exchange data and information through the DeltaLog9 software (Version 2.0 or later versions) running in a Windows operating environment. The measured values can be sent directly to the PC, through the SERIAL function in real time or store them in the internal memory using Logging function (LOG key) in their internal memory.

  • Page 30: The Print Function

    PRINT FUNCTION The PRINT function sends the measurements taken in real time by the instrument inputs directly to a PC or printer S'Print-BT. Print data units of measurements are the same as those used on the dis- play. Printing always includes two parameters. Each pairs data is composed of: temperature in °C or °F, pH or mV.

  • Page 31: Connection To A Pc

    CONNECTION TO A PC The connection to the RS232C del PC serial port of the PC uses the cable with code HD2110CSNM: sub D 9-pole female connector on one end – 8-pole MiniDin on the other end. The connection to the USB port uses the cable with code HD2101/USB: USB type A connector on one end –...
  • Page 32 Connect the instrument to the PC USB port. When Windows detects the new device, the "New software installation wizard" is started. If you are asked for the authorization to search an updated driver, answer NO and continue. In the installation window, select “Install from a list or specific location”. In the next window select “Search for the best driver in these locations”...

  • Page 33: Functioning Notes And Operating Security

    UNCTIONING OTES AND PERATING ECURITY Authorized use Comply with the technical specifications outlined in the chapter “TECHNICAL CHARACTERIS- TICS” Its use is authorized only in conformity with the instructions written in this manual. Any dif- ferent use is considered improper. General instructions on security This instrument has been manufactured and tested according to safety regulation EN 61010-1 con- cerning electronic measurement instruments and was delivered ex factory in perfect security condi-...

  • Page 34: Instrument Technical Characteristics

    INSTRUMENT TECHNICAL CHARACTERISTICS Measured quantities pH, mV, °C, °F Instrument Dimensions (Length x Width x Height) 220x120x55mm Weight 460g (complete with batteries) Materials ABS, rubber Display 2x4½ digits plus symbols Visible area: 52x42mm Operating conditions Operating temperature -5…50°C Warehouse temperature -25…65°C Working relative humidity 0…90%RH without condensation...
  • Page 35 USB interface 1.1 - 2.0 electrically isolated Connections Temperature probe input with SICRAM module or TP47 module 8-pole male DIN45326 connector pH/mV input Female BNC Serial interface and USB pole MiniDin connector Mains adapter (cod. SWD10) 2-pole connector (positive at centre) 12Vdc/1A Measurement of pH by Instrument Measurement range...

  • Page 36: Technical Data Of Probes And Modules Equipped With Instrument

    TECHNICAL DATA OF PROBES AND MODULES EQUIPPED WITH INSTRUMENT pH E LECTRODES MEASURING RANGE AND ORDER CODE DIMENSIONS 0…14pH / 0…80°C / 3bar Glass body - GEL filled 1 ceramic diaphragm Waste water , Drinking wa- KP20 ter, Water emulsions, Gal- vanic, Fruit-juices , Water suspensions, Paints, Titra- tion, Varnish.
  • Page 37 MEASURING RANGE AND ORDER CODE DIMENSIONS 0…14pH / 0…80°C / 3bar Glass body– GEL filled 1 ceramic diaphragm Paints, Varnish, Drinking wa- KP62 ter, Water emulsions, Fruit- juices , Galvanic, Water sus- pensions, Titration, Waste water . 0…14pH / 0…80°C / 1bar Glass body Liquid reference KCl 3M 1 ceramic diaphragm...

  • Page 38: Edox Lectrodes

    EDOX LECTRODES MEASURING RANGE ORDER CODE DIMENSIONS AND USE ±2000mV 0…80°C 5bar KP90 Glass body Liquid reference KCl 3M General use ±1000mV 0…60°C 1bar Epoxy body – GEL filled KP91 with Cable L=1m General use Not heavy duty EMPERATURE PROBES Pt100 EMPERATURE PROBES SENSOR USING SICRAM MODULE...

  • Page 39: Order Codes

    ORDER CODES HD3405.2K The kit is composed of: instrument HD3405.2 datalogger, for the measurement of pH - redox - conductivity - resistivity - TDS - salinity - temperature, 3 1.5V alka- line batteries, operating manual, software DeltaLog9 version 2.0. pH/mV electrodes, temperature probes, standard reference solutions for dif- ferent measurement types, connection cables for pH electrodes with S7 con- nector, cables for data download to PC or printer have to be ordered sepa- rately.

  • Page 40: Orp Electrodes

    KP 80 Combined pointed pH electrode, electrolyte, with screw connector S7, glass body. Extension cable 1.5m with BNC connectors on one side and S7 on the other side for electrode with S7 connector. Extension cable 5m with BNC connectors on one side and S7 on the other side for electrode with S7 connector.
  • Page 41 Temperature probes complete with SICRAM module TP87 Immersion probe, sensor Pt100. Probe's stem Ø 3mm, length 70mm. Cable length 1 metre. TP472I.0 Immersion probe, sensor Pt100. Stem Ø 3 mm, length 230 mm. Cable length 2 metres. TP473P.0 Penetration probe, sensor Pt100. Stem Ø 4mm, length 150 mm. Cable length 2 metres.

  • Page 42: Table Of Contents

    CONTENTS INTRODUCTION ................................4 KEYBOARD AND MENU DESCRIPTION........................5 PH MEASUREMENT..............................13 Automatic or manual pH compensation........................13 pH electrode calibration ............................14 Calibration procedure.............................. 15 Temperature characteristics of Delta OHM buffer solutions .................. 17 Pt100, Pt1000 Ni1000 TP47 ........18 IRECT INPUT INTO TEMPERATURE PROBES WITH MODULE...
  • Page 43 The electric and electronic devices with the following symbol cannot be disposed in the public dumps. According to the Directive UE 2002/96/EC, the European users of electric and electronic devices are allowed to give back to the Distributor or Manufacturer the used device at the time of purchasing a new one. The illegal disposing of electric and electronic devices is punished by a pecuniary administrative penalty.
  • Page 44 G A R A N Z I A G U A R A N T E E G A R A N T I E G A R A N T I A Questo certificato deve accompagnare l'apparecchio spedito al centro assistenza. IMPORTANTE: La garanzia è...

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