Delta OHM HD2156.1 Manual
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Delta OHM HD2156.1 Manual

Delta OHM HD2156.1 Manual

Conductivity meter - ph meter - thermometer
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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 correction without prior notice.
HD2156.1
HD2156.2
ENGLISH
REV. 2.1
15/04/2013

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  • Page 1 REV. 2.1 15/04/2013 HD2156.1 HD2156.2 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: Table Of Contents

    PH MEASUREMENT..............................16 ......................16 UTOMATIC OR MANUAL COMPENSATION ..........................17 ELECTRODE CALIBRATION Temperature characteristics of Delta OHM pH standard solutions ..............20 CONDUCTIVITY MEASUREMENT........................21 ..................22 UTOMATIC OR MANUAL CONDUCTIVITY COMPENSATION ..........................23 ALIBRATION OF CONDUCTIVITY Table of standard solution at 147μS/cm, 1413μS/cm, 12.88mS/cm and 111800mS/cm ........26...

  • Page 3: Introduction

    The storing interval, printing, and baud rate can be configured using the menu. The HD2156.1 and HD2156.2 models are fitted with an RS232C serial port and can transfer the ac- quired measurements to a PC or to a portable printer in real time.
  • Page 4 Conductivity meter – pH meter – Thermometer HD2156.1...
  • Page 5 HD2156.1 1. BNC connector for the pH/mV electrode. 2. 8-pole DIN45326 connector, input for combined 4-ring or 2-ring conductivity/temperature probes, for direct 4-wire Pt100 temperature probes and 2-wire Pt1000 probes complete with TP47 module. 3. External auxiliary power supply connector input (positive at centre).
  • Page 6 Conductivity meter – pH meter – Thermometer HD2156.2...
  • Page 7 HD2156.2 1. BNC connector for the pH/mV electrode. 2. 8-pole DIN45326 connector, input for combined 4-ring or 2-ring conductivity/temperature probes, for direct 4-wire Pt100 temperature probes and 2-wire Pt1000 probes complete with TP47 module. 3. External auxiliary power supply connector input (positive at centre). 4.

  • Page 8: 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 ON-OFF/Auto-OFF 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 9 Automatic turning off The instrument has an AutoPowerOff function that automatically turns the instrument off after about 8 minutes if no key is pressed during the intervening time. The AutoPowerOff function can be dis- abled by holding the CAL/ key pressed down when turning the instrument on: the battery symbol will blink to remind the user that the instrument can only be turned off by pressing the <ON/OFF>...
  • Page 10 blinking. While the display is blinking, it is possible to change the compensation temperature using the arrows ( ). Confirm using 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.
  • Page 11 The menu items are listed in this order: 1) Management of memorized data (only HD2156.2): the message "LOG_DUMP_or_E- RAS" (Transfer data or erase) is scrolled in the comment line. The center figure reports the number of free memory pages (FREE). All memory data are permanently erased by pressing SERIAL/EraseLOG.
  • Page 12 χ χ 2 digit 4) Print and log interval: sets the interval in seconds between two loggings or data transfers to the serial port. The interval can be set at 0, 1s, 5s, 10s, 15s, 30s, 60s (1min), 120s (2min), 300s (5min), 600s (10min), 900s (15min), 1200s (20min), 1800s (30min) and 3600s (1hour).
  • Page 13 proposed. This is also true for the USER buffer, defined by the user at the "SET USER BUFR pH" step: The selection NIL (=no buffer) disables the current buffer. The USER buffer is not compensated for temperature. Please see the paragraph dedicated to pH calibra- tion on page 17.
  • Page 14 If the RCD MODE parameter is set to "tp" (=temperature), the maximum and minimum values displayed using FUNC/ENTER refer to temperature: the indicated conductivity and pH are those measured at the maximum and minimum temperature and are not the maxi- mum and minimum conductivity and/or pH.
  • Page 15 When the LOG key is pressed after the MENU key, the transfer of the logged data on the serial port is started. Please see the paragraph dedicated to data transfer on page 39. SERIAL key - only HD2156.1 SERIAL/EraseLOG key - only HD2156.2 In measurement mode, this function starts and stops the data transfer to the RS232C serial output.

  • Page 16: Ph Measurement

    MEASUREMENT The instruments work with pH measurement electrodes, redox potential measurement electrodes (ORP), and specific ion electrodes. The pH measurement must always be accompanied by a tem- perature measurement. The probes with 4-wire Pt100, 2-wire Pt1000 sensors may be used for meas- uring temperature or for the automatic compensation of the Nernst coefficient with the pH elec- trode.

  • Page 17: P Helectrode 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 18 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 19 11. Press the MENU key. 12. The instrument displays the value detected on the new buffer: continue by repeating the steps from point 4. NOTES: • After calibration, the instrument displays an electrode quality indication: • No signal: electrode functioning. •...

  • Page 20: Temperature Characteristics Of Delta Ohm Ph Standard Solutions

    The 13 standard solutions reported in the table on page 18 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 21: Conductivity Measurement

    This probe's temperature measuring range is 0…+90°C. 4-ring or 2-ring probes The HD2156.1 and HD2156.2 conductivity meters use 4-ring or 2-ring probes for conductivity measurement. The 4-ring probes are preferred to measure high conductivity solutions, either over an extended range or in presence of pollutants.

  • Page 22: Automatic Or Manual Conductivity Compensation

    The probes can be in glass or plastic: the first can work in presence of aggressive pollutants, the lat- ter are more resistant to collisions, and so more suitable for industrial use. Cells with temperature sensor The probes fitted with built-in Pt100 or Pt1000 temperature sensor simultaneously measure the con- ductivity and the temperature: that allows automatic correction of the effect of the latter on the solu- tion conductivity.

  • Page 23: Calibration Of Conductivity

    In absence of the temperature probe, the lower display shows the manually set compensation tem- perature (default=25°C). To point this condition out, the °C or °F symbol blinks intermittently near the temperature value. On the main display an "m" (manual) is turned on near the battery symbol (if on). The MT indica- tion is printed on the print-outs.
  • Page 24 1. Turn the instrument on with the ON/OFF key. 2. Select the conductivity measurement by pressing " χ -Ω-TDS/ESC". 3. Set the probe's cell constant by selecting it from the admitted values: 0.01, 0.1, 0.7, 1.0 or 10.0 4. Dip the conductivity meter cell in the calibration solution until the electrodes are covered with liquid.
  • Page 25 8. Select the conductivity measurement by pressing χ -Ω-TDS/ESC. 9. Press the CAL key. The CAL symbol is turned on. The unit of measurement (μS/cm or mS/cm) appears on the comment line. If the calibration solution conductivity is sufficiently close (-30% to +50%) to one of the standard solutions, the secondary line displays the value. Otherwise it displays the calculated value according to current settings.

  • Page 26: Table Of Standard Solution At 147Μs/Cm, 1413Μs/Cm, 12.88Ms/Cm And 111800Ms/Cm

    Table of standard solution at 147μS/cm, 1413μS/cm, 12.88mS/cm and 111800mS/cm The table reports the standard solutions automatically detected by the instrument according to tem- perature. °C µS/cm µS/cm mS/cm mS/cm °C µS/cm µS/cm mS/cm mS/cm 15.0 1147 10.48 92.5 26.0 1440 13.13 113.8...

  • Page 27: Direct Input Into Pt100 And Pt1000 Temperature Probes

    Instructions to connect the TP47 module for conductivity/temperature combined probes, 4-wire Pt100 probes, and 2-wire Pt1000 probes All Delta Ohm probes are provided with a connector. The HD2156.1 and HD2156.2 instruments also work with conductivity/temperature combined probes, direct 4-wire Pt100 probes, 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 28 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 29 The wires coming from the conductivity probe are welded directly on the DIN45326 connector as reported in the following table: Sensor Direct connection to the connector DIN45326 Jumper Jumper between 2-ring pins 1 and 4 conductivity probe Jumper between pins 2 and 5 Internal view of the connector 4- ring conductivity...
  • Page 30 The wires coming from the conductivity/Pt100 temperature combined probe are welded directly on the connector as reported in the following table. Sensor Direct connection to the connector DIN45326 Jumper Pt100 2-ring Jumper between conductivity pins 1 and 4 probe Pt100 Jumper between temperature pins 2 and 5...

  • Page 31: 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 32: Notes On The Use Of The Ph Electrodes

    OTES ON THE USE OF THE ELECTRODES The average life of a pH electrode is about 1 year, depending on the use and maintenance. The electrodes used at high temperatures or in strong alkaline environments normally have a shorter life. The new electrodes should be conditioned for half a day immersed in a 6.86pH or 4pH buffer.

  • Page 33: 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 appears if the conductivity/temperature probe is measuring a value exceeding the set measuring range.
  • Page 34 The following table reports the indications provided by the instrument as they appear on the display, together with their description. Display indication Explanation temperature coefficient α ALPH AUTO-HOLD automatic function holding the displayed measurement battery discharged - replace it immediately BATT TOO LOW - CHNG NOW baud rate value BAUDRATE...

  • Page 35: 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… 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 36: 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 37: Serial Interface And Usb

    SERIAL INTERFACE AND USB The HD2156.1 and HD2156.2 instruments are fitted with an electrically isolated RS-232C serial in- terface; the HD2156.2 also has an USB 2.0 interface. The following serial cables can be used: • HD2110CSNM: serial connection cable with 8-pole MiniDin connector on one end and 9-pole Sub D connector on the other end;...
  • Page 38 Command Response Description M=pH/conductivity meter Model description SN=12345678 Instrument serial number Firm.Ver.=01-01 Firmware version Firm.Date=2004/06/15 Firmware date cal 0000/00/00 00:00:00 Calibration date and time Probe A= Cond.+Pt1000 Type of probe connected to input User ID=0000000000000000 User code (set with T2xxxxxxxxxxxxxxxx) Print instrument's heading Stop printing data PRINTOUT IMMEDIATE...

  • Page 39: Storing And Transferring Data To A Personal Computer

    STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER The HD2156.1 and HD2156.2 instruments can be connected to a personal computer via an RS232C serial port or USB 2.0 port, and exchange data and information through the DeltaLog9 software running in a Windows operating environment. Both models can send in real time input measured values directly to a PC, through the PRINT function;...

  • Page 40: The Print Function

    PRINT FUNCTION The PRINT function sends the measurements taken in real time by the instrument inputs directly to a PC or a printer. Print data units of measurements are the same as those used on the display. Print- ing always includes three parameters. Each set of three data is composed of: temperature in °C or °F, conductivity or resistivity or TDS or NaCl, pH or mV.

  • Page 41: Connection To A Pc

    SERIAL PORT OF THE INSTRUMENT 1. The measurement instrument must be switched off. 2. Using the Delta Ohm HD2110CSNM or C.206 cable, connect the measurement instrument to the first free RS232C (COM) or USB serial port of the PC. 3. Turn on the instrument and set the baud rate to 38400 (MENU >> ENTER until the Baud Rate parameter >>...

  • Page 42: Notes About Working And Operative Safety

    NOTES ABOUT WORKING AND OPERATIVE SAFETY Authorized use The technical specifications as given in chapter "TECHNICAL CHARACTERISTICS" must be ob- served. 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 regula- tions for electronic measuring instruments.

  • Page 43: Instrument Technical Characteristics

    INSTRUMENT TECHNICAL CHARACTERISTICS Instrument Dimensions (Length x Width x Height) 185x90x40mm Weight 470g (complete with batteries) Materials ABS, rubber Display 2x4½ digits plus symbols Visible area: 52x42mm Operating conditions Working temperature -5…50°C Storing temperature -25…65°C Working relative humidity 0…90%RH without condensation Protection degree IP66 Power Supply...
  • Page 44 Connections pH/mV input Female BNC connector Conductivity input 8-pole male DIN45326 connector RS232 serial interface 8-pole MiniDin connector USB interface (only HD2156.2) Mini-USB type B connector Mains adapter (cod. SWD10) 2-pole connector (positive at centre) Measurement of pH by Instrument Measurement range -2.00…+19.99pH Resolution...
  • Page 45 Measurement of resistivity by Instrument Measurement range (Kcell=0.1) / Resolution Up to 100MΩ⋅cm / (∗) Measurement range (Kcell=1) / Resolution 5.0…199.9Ω⋅cm / 0.1Ω⋅cm 200…999Ω⋅cm / 1Ω⋅cm 1.00k…19.99kΩ⋅cm / 0.01kΩ⋅cm 20.0k…99.9kΩ⋅cm / 0.1kΩ⋅cm 100k…999kΩ⋅cm / 1kΩ⋅cm 1…10MΩ⋅cm / 1MΩ⋅cm Measurement range (Kcell=10) / Resolution 0.5…5.0Ω⋅cm / 0.1Ω⋅cm ±0.5% ±1digit Accuracy (resistivity)
  • Page 46 Standard solutions automatically detected (@25°C) 147μS/cm 1413μS/cm 12880μS/cm 111800μS/cm Measurement of temperature by Instrument Pt100 measurement range -50…+200°C Pt1000 measurement range -50…+200°C Resolution 0.1°C ±0.25°C Accuracy Drift after 1 year 0.1°C/year...

  • Page 47: Technical Data Of Probes

    TECHNICAL DATA OF PROBES ELECTRODES MEASURING RANGE ORDER CODE DIMENSIONS AND USE 0…14pH / 0…80°C / 2bar 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 48 MEASURING RANGE ORDER CODE DIMENSIONS AND USE 0…14pH / 0…80°C / 2bar 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 49: Redox Electrodes

    MEASURING RANGE ORDER CODE DIMENSIONS AND USE 0…14pH / 0…80°C / 1bar Glass body – Liquid refer- ence KCl 3M Teflon ring diaphragm. KP100 pH combined electrode, flat membrane, S7 connector glass body, for skin, leather, paper. EDOX LECTRODES MEASURING RANGE ORDER CODE DIMENSIONS AND USE...

  • Page 50: Order Code

    MEASUREMENT ORDER CODE DIMENSIONS RANGE K=0.1 0.1μS/cm …500μS/cm SPT01G 0…80°C 2-electrode cell Glass/Platinum 10μS/cm …10mS/cm SPT1G 0…80°C 2-electrode cell Glass/Platinum K=10 500μS/cm …200mS/cm SPT10G 0…80°C 2-electrode cell Glass/Platinum Pt100 4- Pt1000 2- TP47 WIRE PROBES AND WIRE PROBES COMPLETE WITH MODULE Model Type...

  • Page 51: Order Codes

    ORDER CODES HD2156.1 Kit including: instrument HD2156.1, 4 x 1.5V alkaline batteries, operating man- ual, case and DeltaLog9 software. HD2156.2 Kit including: instrument HD2156.2 datalogger, 4 x 1.5V alkaline batteries, op- erating manual, case and DeltaLog9 software. pH/mV electrodes, conductivity probes, temperature probes, standard refer- ence solutions, connection cables for pH electrodes with S7 connector, cables for connection to PC or printer have to be ordered separately.

  • Page 52: Cleaning And Maintenance

    KP70 Combined pH electrode micro, diam.6.5mm, GEL filled, bread, mixtures, cheese, etc., with screw connector S7, glass body. KP80 Combined pointed pH electrode, electrolyte, with screw connector S7, glass body. KP100 Glass body – Liquid reference KCl 3M, Teflon ring diaphragm pH combined electrode, flat membrane, S7 connector, glass body, for skin, leather, paper.
  • Page 53 TP47 Only connector for probe connection: Pt100 direct 4 wires, Pt1000 2 wires. DELTA OHM metrology laboratories LAT N° 124 are accredited by ACCREDIA for Tem- perature, Humidity, Pressure, Photometry / Radiometry, Acoustics and Air Velocity. They can supply calibration certificates for the accredited quantities.
  • Page 54 OTES...
  • Page 55 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 56: Warranty

    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 pe- riod, shall be deemed non efficient according to its own judgement. Complete replacement is excluded and no damage claims are accepted.

This manual is also suitable for:

Hd2156.2

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