Delta OHM HD 98569 Manual
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Delta OHM HD 98569 Manual

Delta OHM HD 98569 Manual

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REV. 1.1
22/01/2013
HD 98569
ENGLISH
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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  • Page 1 REV. 1.1 22/01/2013 HD 98569 ENGLISH 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 HD 98569 pH – Conductivity – Dissolved Oxygen – Temperature...
  • Page 3 8-pole DIN45326 connector, input for dissolved Oxygen and temperature combined probes with SICRAM module, or temperature only Pt100 probes with SICRAM module. 8-pole DIN45326 connector, for combined pH/mV/temperature electrodes with SICRAM module, or temperature only Pt100 probes with SICRAM module. Function key F1: The key’s function is described in the bottom line of the display.

  • Page 4: Introduction

    USB 2.0-1.1 port. If equipped with the Bluetooth HD22BT option, the HD 98569 can send the data to a PC fitted with the USB/Bluetooth HD USB.KL1 converter, to a printer with a Bluetooth HD40.2 interface, or to a PC fitted with a Bluetooth input, without the need of any connection.

  • Page 5: Display Description

    Display Description When you turn the instrument on the display appears as in the figure. The display is backlit: To enable or disable the backlight, select the menu item Menu >> System Parameters >> Backlight. You can adjust the contrast level: Use the arrows to modify it.
  • Page 6 symbol blinks to indicate that the measurement is in the stabilization phase. In the position indicated by point 1, the measurement remains within a predefined stability range for 8 seconds. At the end of this interval (point 2), the instrument freezes the measurement, and shows a stable value.

  • Page 7: Keyboard Description

    Keyboard description Each key specific function is described in detail below. ON-OFF key The instrument is turned on using the ON/OFF key. Press this key for at least two seconds. When pressing ON-OFF again the instrument is turned off. The turning on starts a self test including the detection of the probes connected to the inputs. As the probes’...
  • Page 8 If the EPT option is set to Auto, Man or Time, pressing PRINT only causes the print to occur when the measurement has stabilized (EPT symbol still); until the measurement is frozen, it is possible to repeat the print at will, but the sample identifier number is not increased. This is useful when more labels concerning a single measurement must be printed with the same identification code, without increasing the code each time.
  • Page 9 MEM key It manages the single data storage. For continuous recording use the LOG key. By pressing MEM you will enable the F1= STOR, F2=CLR and F3=VIEW commands. F1=STOR stores the current screen. Before enabling the MEM function, you can select (using the F1=pH/mV, F2=O and F3=cond function keys) the variable to be stored: pH or mV, conductivity, resistivity, TDS or NaCl, dissolved Oxygen concentration, or saturation index;...
  • Page 10 Up Arrow in the menu, it increases the current value. ESC key In the menu, the key clears or cancels the active function. Right Arrow In the menu, it moves the cursor rightwards. During measurement, it increases the display contrast. ENTER key In the menu, the ENTER key confirms the current parameter.

  • Page 11: Menu Description

    Menu description The MENU key is used to access the menu main screen. To select one item, use the arrow keys ). The selected item has a white text on a black background. INFO / STATUS / HELP User Options System Parameters pH Options Conductivity Options...
  • Page 12 “SYSTEM PARAMETERS” 3.1. “Date and Time” manages the instrument date and time setting. Use the arrows to move the cursor, and the arrows to edit the selected value. The MENU key clears the seconds to synchronize them to the minute: Use the arrows to set the current minute plus one, and as soon as that minute is reached press MENU.
  • Page 13 The data in the memory are not cleared. This operation can be carried out only by the administrator (see page 17). 3.5.2. “Complete Reset”: The complete system reset restores the instrument to the original factory conditions, restoring all menu parameters. After a complete reset, the date, time, baud rate, log interval...
  • Page 14 In the next table, select the value to be assigned to the chosen buffer. 1.679 4.000 4.010 6.860 7.000 7.648 9.180 10.010 CUSTOM You can select one of the 8 buffers in the memory, enter a user defined CUSTOM buffer, or exclude one from the list by selecting NIL. The 8 buffers in the memory are compensated for temperature, but the buffer defined by the user is not compensated for temperature: So the buffer value must be set at the actual solution temperature.
  • Page 15 4.6.4. “Reset Std. glass electrode”: It restores the standard pH measurement functioning and disables the special electrode measurement correction. Note: The “Set Antimony Electrode” function activation or the modification of the submenu items, will erase the current calibration. When exiting the menu, you should perform a new calibration.
  • Page 16 Instrument Identifier Code The instrument can be identified using a code appearing in the printouts and in the stored data. This code is managed (creation, editing, erasing...) using the DeltaLog11 software (vers. 2.0 and later) and this can be performed only by the administrator (see page 17).

  • Page 17: User Management

    User Management The user must identify himself or herself by entering a user name and password: The registered user name is shown in all performed operations: Printing, logging, calibration... The available users are: Administrator, user_1, user_2, user_3 and anonymous user. The different users have different usage levels: The Administrator is enabled to use all of the instrument functions and assigns the password to the other users.

  • Page 18: Functions Reserved To The Administrator

    Functions reserved to the administrator Some functions are reserved to the user registered as "Administrator" (see the details on page 11). Only the Administrator can: • Modify the instrument identifier with the DeltaLog11 software (vers. 2.0 and later), • Perform the instrument partial and total reset, •...

  • Page 19: Ph Measurement

    The HD 98569 instrument works with combined pH/temperature probes complete with SICRAM module, pH measurement electrodes, redox potential measurement electrodes (ORP), and specific ion electrodes combined with the SICRAM KP471 module. To switch from pH to mV and vice versa, press the F1= pH/mV function key.

  • Page 20: Automatic Or Manual Temperature Compensation For Ph Measurement

    The electrode for pH measurement The electrode for pH measurement, generally in glass, generates an electrical signal proportional to the pH according to Nernst law. Of this signal the following aspects are considered: Zero point: The pH where the electrode generates a potential of 0 mV. In most electrodes, this value is found at about 7 pH.

  • Page 21: Ph Electrode Calibration

    the KP471 module, if no temperature probe or combined probe with temperature sensor is also connected. In MTC mode, in order to manually change the compensation temperature press °C/°F once: The indicated temperature value starts blinking. Select the desired temperature value by using the arrows, and confirm with ENTER.
  • Page 22 • The buffer solution nominal value at 25°C as detected by the instrument (in the figure Nom.=6.865) and the symbol indicating the electrode quality. • The numbers 0, 1, 2, 3, 4 and 5 refer to the buffer solutions of the Buffer1, ..., Buffer5 menu.

  • Page 23: Temperature Characteristics Of Delta Ohm Standard Solutions

    The 8 standard buffers reported in the table on page 21 are memorized in the instrument 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 24: Conductivity Measurement

    Conductivity measurement The HD 98569 works with combined conductivity/temperature probes with SICRAM (right input). The 4 wire Pt100 temperature sensor is used for automatic compensation of conductivity. If a temperature only probe is connected (to the pH/mV or O inputs), the measured temperature value becomes the reference value, and has priority on the one supplied by the combined conductivity probe.

  • Page 25: Automatic Or Manual Temperature Compensation For Conductivity Measurement

    Probes with temperature sensor The combined conductivity probes for the HD 98569 are fitted with a built-in Pt100 temperature sensor, and measure conductivity and temperature at the same time: This allows automatic correction of the conductivity (ATC) according to the measured temperature.

  • Page 26: Resistivity, Tds And Salinity Measurements

    α on the display. Resistivity, TDS and salinity measurements The HD 98569 instrument measures electric conductivity and temperature of a solution, and then calculates resistivity, salinity and TDS. By repeatedly pressing “F3 = cond.” you can select the measurement.
  • Page 27 Turn the instrument on with the ON/OFF key. Set the α temperature coefficient in the menu (point 5 on page 15): For Delta OHM calibration solutions, enter 2.00%/°C. Set the reference temperature in the menu (20°C or 25°C) (point 5.1 on page 15).

  • Page 28: Manual Calibration Of Conductivity Using Not-Memorized Standard Solutions

    12. Extract the probe from the calibration solution, wash it, clean it carefully, and insert it in the following solution. 13. The instrument proposes the detected value of the new solution and the corresponding range is blinking. The previous point is captured permanently. 14.
  • Page 29 The instrument measures the conductivity according to the cell constant saved in the probe’s SICRAM memory: If the read value is sufficiently close to the theoretical one, the “Target” indication reports the actual value, at the measured temperature, of one of the four standard solutions: The detected standard solution is displayed in the “nom_buf”...

  • Page 30: Table Of Standard Solutions At 147Μs/Cm, 1413Μs/Cm, 12880Μs/Cm And 111800Μs/Cm

    • Upon confirming the calibration by using “F3 = CAL”, the instrument checks that the correction to the cell constant does not exceed the ±10% limits. If the calibration is rejected because it exceeds the ±10% limit, the “NON ADMISSIBLE VAR%” message will appear, followed by a long beep.

  • Page 31: Measurement Of The Dissolved Oxygen

    Measurement of the dissolved Oxygen The HD 98569 measures dissolved Oxygen using combined probes of polarographic, with two or three electrodes, and galvanic type with integrated temperature sensor. The dissolved Oxygen probe is fitted with a SICRAM interface module that stores the last 8 calibrations and the serial number.

  • Page 32: Calibration Of The Dissolved Oxygen Probe

    Calibration of the dissolved Oxygen probe The probe must be calibrated periodically using the DO9709/20 (for polarographic probe) or DO9709/21 (for galvanic probe) calibrator. The instrument checks the dissolved Oxygen probe efficiency. The "OFS_ERROR" message indicates that the probe is exhausted. The same message is displayed during calibration, when calibration is not possible or the reading is unstable.

  • Page 33: Electrolyte Solution And/Or Membrane Replacement

    Electrolyte solution and/or membrane replacement The electrolyte contained in the dissolved oxygen probe will be exhausted because of the chemical reaction generated by the current in proportion to the partial pressure of the oxygen present in the water. Subsequently, the current generated by the probe is so low that the calibration operation is impossible.

  • Page 34: Check The Probe's Status

    Check the probe's status The glass body covering the cathode of the polarographic probe and the membrane on the probe's head should not be damaged. If there are cracks in the glass body, the probe must be replaced. If the Oxygen-permeable membrane is damaged, dirty or obstructed it must be replaced.

  • Page 35: Temperature Measurement

    Temperature measurement The instrument accepts platinum temperature probes with resistances of 100Ω and SICRAM module on the pH/mV and O inputs. The instrument can also measure the temperature using the combined pH/temperature, conductivity/temperature and dissolved Oxygen/temperature probes. The temperature sensor excitation current was chosen in order to minimize the sensor self-heating effects.

  • Page 36: Warnings And Operating Instructions On The Temperature Sensors

    Warnings and operating instructions on the temperature sensors 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 37: Instrument Storage

    Instrument storage Instrument storage conditions: • Temperature: -25…+65°C. • Humidity: less than 90% RH without condensation. • During storage avoid locations where: humidity is high, the instrument may be exposed to direct sunlight, the instrument may be exposed to a source of high temperature; the instrument may be exposed to strong vibrations;...

  • Page 38: Ph, Conductivity And Dissolved Oxygen Measurements - Most Frequent Problems, Possible Causes And Handling

    pH, conductivity and dissolved Oxygen measurements - Most frequent problems, possible causes and handling Instrument functioning • When selecting some functions the “Operation reserved to the administrator” message is displayed on the screen. Some instrument functions are reserved to the user registered as "Administrator". The other users cannot execute them (see the details on page 17).

  • Page 39: Measurement Of The Dissolved Oxygen

    Check that the cell used is suitable for the measurement range. Check that the cell is not dirty, that there are no air bubbles inside it. Repeat the calibration using the proper not contaminated standard. Slow response or instability. Check that the cell is not dirty, that there are no traces of oil or air bubbles inside it. If you work with a Platinum cell, new platinum-coating of the electrode could be necessary.

  • Page 40: Instrument Signals And Faults

    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 indication Explanation This message appears if the pH measurement exceeds the -2.000pH…19.999pH limits, if the mV measurement exceeds the pH ERROR ±2.4V limits.

  • Page 41: Battery Symbol And Battery Replacement

    The instrument does not turn on, if the battery charge level is insufficient. In order to avoid data loss, the logging session is ended, if the HD 98569 is logging and battery voltage falls below the minimum operating level.
  • Page 42 ALFUNCTIONING UPON TURNING ON AFTER BATTERY REPLACEMENT After replacing the batteries, the instrument may not restart correctly; in this case, repeat the operation. After disconnecting the batteries, wait a few minutes in order to allow circuit condensers to discharge completely; then reinsert the batteries. ARNING BOUT THE SE OF...

  • Page 43: Serial Interface And Usb

    Before sending commands to the instrument via the serial port, locking the keyboard to avoid functioning conflicts is recommended: Use the P0 command. When complete, restore the keyboard with the P1 command. Reading the instrument parameters COMMAND ACTION RESPONSE NOTES HD 98569 Model request pH/Chi/Oxy/temperature Firmware version Firmware 1.00.100 Firmware date 2006_01_31 Serial number Ser.
  • Page 44 COMMAND ACTION RESPONSE NOTES Current date “yy/mm/dd hh/mm/ss”, Clock date request 060414092400 HEX format Clock date request 06-12-31 00:33:27 yy-mm-dd hh:mm:ss Instrument calibration date Calibration date 060414092400 request “yy/mm/dd hh/mm/ss”, HEX format Instrument calibration date 06-12-31 00:33:27 yy-mm-dd hh:mm:ss request Print current measurements Same as manual print It increases the ID...
  • Page 45 COMMAND ACTION RESPONSE NOTES Setting of the displayed x = 0...3 // pH, cond, temp, oxy unit of measurement y = see the RU codes Setting log interval &/? 0...999 0 = endpoint “dir” 1 = endpoint “man” Setting Endpoint mode &/? 2 = endpoint “time”...

  • Page 46: Connection To A Pc

    PC fitted with a Bluetooth HD USB.KL1, to a Bluetooth HD40.2 printer, or to a PC with built-in Bluetooth interface. The HD 98569 is supplied with DeltaLog11 software (vers. 2.0 and later). The software manages the connection, data transfer, graphic presentation, and printing operations of the captured or logged measurements.
  • Page 47 Complete the installation by clicking on Finish. Wait few seconds until the DeltaLog11 page appears. Close DeltaLog11. 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”.

  • Page 48: Bluetooth Connection

    LUETOOTH ONNECTION Delta Ohm can install the Bluetooth HD22BT module on the HD 98569. Through this module, the instrument can be wirelessly connected to a Bluetooth ready PC or printer. If the PC is not originally fitted with a Bluetooth interface, you need to connect the USB/Bluetooth interface, code HD USB.KL1, on a PC’s USB port.

  • Page 49: Storing And Transferring Data To A Pc

    Storing and Transferring Data to a PC The HD 98569 instrument can be connected to a personal computer via an RS232C serial port or an USB port, and exchange data and information through the DeltaLog11 software (vers. 2.0 and later) running in a Windows operating environment (see the details on the previous chapter).

  • Page 50: The Print Function

    The instrument starts clearing the internal memory; at the end of the operation, it goes back to normal display. NOTES: • The data transfer carried out using the DeltaLog11 software does not cause the memory to be erased; the operation can be repeated as many times as required. •...
  • Page 51 Example of a printout obtained using the HD40.1 or HD40.2 printer NOTES HD 98569 Instrument model pH / chi / Oxy / temperature Ser num=12345678 Instrument serial number Current date and time in the format 2007 – 01 - 31 12:00:00...

  • Page 52: Functioning Notes And Operating Safety

    Functioning Notes and Operating Safety Authorized use The instrument has been designed exclusively for laboratory measurements. Comply with the technical specifications outlined in the chapter TECHNICAL DATA on page 55. Its use is authorized only in conformity with the instructions written in this manual. Any different use is considered improper.

  • Page 53: Hd22.2 Laboratory Electrode Holder With Magnetic Stirrer

    HD22.2 Laboratory electrode holder with magnetic stirrer HD22.3 Laboratory electrode holder HD22.2 The HD22.2 is a laboratory electrode holder with an ultra slim magnetic stirrer. The height adjustable electrode holder supports two standard ∅ 12 mm electrodes. The stirring is performed by a small magnetic bar (not supplied) immersed in the liquid: The motion is generated by a rotary magnetic field controlled by microprocessor.
  • Page 54 Technical Information HD22.2 HD22.3 Power 12Vdc, 200mA Stirring speed 15…1500 rpm Stirring capacity Max. 1000 ml Stirring magnetic bar L = 30…40 mm, depending on the application Material Body ABS; staff AISI 304 Body ABS; base Fe 360 Painting Nickel plated and powder- coated Weight 1150g...

  • Page 55: Hd 98569 Technical Characteristics

    HD 98569 Technical characteristics pH - mV Measured quantities χ - Ω - TDS - NaCl mg/l O - %O °C - °F Instrument Dimensions (Length x Width x Height) 250x100x50mm Weight 640g (batteries included) Materials ABS, rubber Display Graphic, backlit display, 56x38 mm.
  • Page 56 1.1 - 2.0 electrically isolated Optional, for PC fitted with Bluetooth input Bluetooth interface or Bluetooth/RS232 HD USB.KL1 adaptor. The interface can be installed only by Delta Ohm Connections Enabled inputs for temperature probes pH/mV and O inputs. with SICRAM module...
  • Page 57 • Measurement of conductivity by Instrument Resolution Measurement range (Kcell=0.01) 0.000…1.999μS/cm 0.001μS/cm Measurement range (Kcell=0.1) 0.00…19.99μS/cm 0.01μS/cm Measurement range (Kcell=1) 0.0…199.9μS/cm 0.1μS/cm 200…1999μS/cm 1μS/cm 2.00…19.99mS/cm 0.01mS/cm 20.0…199.9mS/cm 0.1mS/cm Measurement range (Kcell=10) 200…1999mS/cm 1mS/cm ±0.5% ±1digit Instrument accuracy (conductivity) Measurement of resistivity by Instrument Resolution Measurement range (Kcell=0.01) Up to 1GΩ⋅cm...
  • Page 58 0...100°C with α = 0.00…4.00%/°C Automatic/manual temperature compensation 0…50°C (default 20°C or 25°C) Reference temperature χ 0.4…0.8 / TDS conversion factor 0.01…20.00 Allowed cell constant K (cm Standard solutions automatically detected (@25°C) 147μS/cm 1413μS/cm 12880μS/cm 111800μS/cm • Measurement of the concentration of dissolved Oxygen Measurement range 0.00…90.00mg/l Resolution...

  • Page 59: Technical Data In Line Probes For The Hd 98569 Instrument

    Technical data in line probes for the HD 98569 instrument pH / mV SICRAM KP471 module to connect the pH electrodes and the S7 connector Please see the technical characteristics of the electrode connected to the module. Cable length: KP471...
  • Page 60 MEASUREMENT RANGE AND ORDER CODE DIMENSIONS 0…14pH / 0…80°C / 3bar Body in glass - GEL 1 diaphragm in ceramic Colours, varnishes, drinking KP62 water, aqueous emulsions, fruit- juices, electroplating waters, stock waters, titration, waste water. 0…14pH / 0…80°C / 0.1bar Body in glass Liquid reference KCl 3M Teflon ring diaphragm...
  • Page 61 Redox electrode to be connected to the KP471 SICRAM module MEASUREMENT RANGE ORDER CODE DIMENSIONS AND USE ±2000mV 0…80°C 5bar Body in glass KP90 Liquid reference KCl 3M General use. pH electrodes complete with SICRAM module CODICE DI CAMPO DI MISURA DIMENSIONI ORDINAZIONE ED IMPIEGO...

  • Page 62: And 4-Electrode Conductivity Probes For Hd 98569

    HD 98569 ELECTRODE CONDUCTIVITY PROBES FOR Conductivity probes with SICRAM module MEASUREMENT RANGE ORDER CODE DIMENSIONS AND USE K=0.7 5μS/cm …200mS/cm 0…90°C 4-electrode cell in Platinum SP06TS Ø 12 Ø 17 Pocan probe material General use Not heavy duty Pt100 sensor K=0.01...

  • Page 63: Dissolved Oxygen Probes For Hd 98569

    HD 98569 ISSOLVED XYGEN PROBES FOR Model DO9709 SS DO9709 SS.5 DO9709 SS.1 DO9709 SS.5.1 Polarographic probe, Galvanic probe, Type Silver anode, Platinum cathode Zinc anode, Silver cathode 0.00…60.00mg/l 0.00…20.00mg/l Range O Operating 0…45°C 0…50°C temperature ±1% f.s. ±2% f.s.

  • Page 64: Temperature Probes Pt100 Using Sicram Module

    Pt100 SICRAM EMPERATURE PROBES USING MODULE Model Type Application range Accuracy ±0.25°C (-196°C…+300°C) Immersion -196°C…+500°C TP472I ±0.5°C (+300°C…+500°C) TP472I.0 Immersion -50°C…+300°C ±0.25°C 1/3 DIN – Thin Film ±0.25°C (-50°C…+300°C) Penetration -50°C…+400°C TP473P.I ±0.5°C (+300°C…+400°C) TP473P.0 Penetration -50°C…+300°C ±0.25°C 1/3 DIN - Thin Film ±0.3°C (-50°C…+300°C) Contact -50°C…+400°C...

  • Page 65: Order Codes

    Order codes The kit is composed of the HD 98569 datalogger instrument for pH - redox - HD 98569 conductivity - resistivity - TDS - salinity - dissolved Oxygen concentration - saturation index - temperature measurements, 4 1.5V type AA batteries, HD9709/20 (for polarographic probe) or DO9709/21 (for galvanic probe) calibrator, operating manual, case and DeltaLog11 software (vers.
  • Page 66 pH electrodes to be connected to the KP471 SICRAM module Combined general use pH electrode, gel-filled, with screw connector S7, body in KP20 Epoxy. Combined pH electrode for general use, varnishes, emulsions, gel-filled, with KP 50 screw connector S7, body in glass. Combined pH electrode, 3 diaphragms for milk, cream, etc.
  • Page 67 AINTENANCE AND CLEANING Diaphragm cleaning solution (Tiourea in HCl) – 200ml. HD62PT Diaphragm cleaning solution (Pepsina in HCl) – 200ml. HD62PP Electrode regeneration solution (Fluorhydric Acid) – 100ml. HD62RF Electrode preservation solution – 200ml. HD62SC OMBINED CONDUCTIVITY AND TEMPERATURE PROBES USING SICRAM MODULE Conductivity/temperature combined probe, 4-electrode cell in Platinum, body in SP06TS Pocan.
  • Page 68 CCESSORIES FOR THE COMBINED DISSOLVED XYGEN PROBES Accessories kit for the DO9709 SS and DO9709 SS.5 probes consisting of two DO9709 SSK membranes, zero solution, electrolyte solution. Calibrator for DO9709 SS and DO9709 SS.5 polarographic probes. DO9709/20 Electrolyte solution for DO9709 SS and DO9709 SS.5 polarographic probes. DO9701 Accessories kit for the DO9709 SS.1 and DO9709 SS.5.1 probes consisting of DO9709/21K...

  • Page 69: Table Of Contents

    Automatic or manual temperature compensation for pH measurement..........20 pH electrode calibration ........................21 Calibration procedure .........................21 Temperature characteristics of Delta OHM standard solutions ............23 Conductivity measurement ........................24 Automatic or manual temperature compensation for conductivity measurement ........25 Resistivity, TDS and salinity measurements..................26 Calibration of conductivity........................26...
  • Page 70 HD22.2 Laboratory electrode holder with magnetic stirrer ..............53 HD22.3 Laboratory electrode holder .......................53 HD 98569 Technical characteristics......................55 Technical data in line probes for the HD 98569 instrument ..............59 2 and 4-electrode conductivity probes for HD 98569 ................62 Dissolved Oxygen probes for HD 98569....................63 Temperature probes Pt100 using SICRAM module .................64...
  • Page 71 Delta OHM presso l’Istituto Primario Nazionale di Ricerca Metrologica. The traceability of measures assigned to international and national reference samples is guaranteed by a reference chain which source is the calibration of Delta OHM accredited laboratories reference samples at the Primary National Metrological Research Institute.
  • Page 72 All DELTA OHM instruments are subject to accurate testing, and are guaranteed for 24 months from the date of purchase. DELTA OHM will repair or replace free of charge the parts that, within the warranty period, shall be deemed non efficient according to its own judgement. Complete replacement is excluded and no damage claims are accepted.

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