GHM Delta OHM HD2156.1 Operating Manual
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GHM Delta OHM HD2156.1 Operating Manual

Conductivity meters / ph meters / thermometers
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English
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Operating manual
Conductivity meters / pH meters /
thermometers
HD2156.1 – HD2156.2
www.deltaohm.com
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Summary of Contents for GHM Delta OHM HD2156.1

  • Page 1 English Operating manual Conductivity meters / pH meters / thermometers HD2156.1 – HD2156.2 Companies / Brands of GHM www.deltaohm.com Keep for future reference.

  • Page 2: Table Of Contents

    CONTENTS INTRODUCTION ................................3 KEYBOARD AND MENU DESCRIPTION ........................8 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 ..........................

  • Page 3: Introduction

    INTRODUCTION The HD2156.1 and HD2156.2 are portable instruments with a large LCD display. They measure pH, mV, redox potential (ORP), conductivity, liquid resistivity, total dissolved solids (TDS) and sa- linity using combined 4-ring and 2-ring conductivity/temperature probes. Temperature only is measured by Pt100 or Pt1000 immersion, penetration or contact probes.
  • Page 4 Conductivity meter – pH meter – Thermometer HD2156.1 - 4 - HD2156 V2.5...
  • 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). 4.
  • Page 6 Conductivity meter – pH meter – Thermometer HD2156.2 - 6 - HD2156 V2.5...
  • 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 disa- bled 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 ( and ). 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    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 pH are those measured at the maximum and minimum temperature and are not the maxi- mum and minimum conductivity and/or pH. Finally, if the RCD MODE parameter is set to "Indep" (=independent), the maximum and minimum values displayed using FUNC/ENTER are independent: the indicated pH, conduc- tivity and temperature are the maximum and minimum measured values but are not neces- sarily referred to the same measurement moment (factory default).
  • Page 15 The HD2156.2 can turn off during logging between one capture and the next: the function is con- trolled by the Sleep_Mode_LOG parameter. When the logging interval is less than one minute, the logging instrument remains on; with an interval of at least one minute, it turns off between one cap- ture and the next if the parameter Sleep_Mode_LOG=YES.

  • 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

    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. 6.86 pH @ 25°C 4.01 pH @ 25°C °C...

  • Page 21: Conductivity Measurement

    ONDUCTIVITY MEASUREMENT The instruments work with conductivity/temperature combined probes, 4-ring and 2-ring, only con- ductivity probes, or temperature probes. The 4-wire Pt100, 2-wire Pt1000 probes may be used for measuring temperature, which is used for the automatic compensation of the conductivity. The instrument obtains the following from the measurement of conductivity: ...

  • 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 conductivity and the temperature: that allows automatic correction of the effect of the latter on the solution 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 (S/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.

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

    Table of standard solution at 147S/cm, 1413S/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

    Pt100 Pt1000 T IRECT INPUT INTO EMPERATURE PROBES The instrument accepts the input of Platinum temperature probes with resistances of 100Ω and 1000Ω. The Pt100 are connected to 4 wires, the Pt1000 to 2 wires, with the excitation current chosen mini- mizing the sensor self-heating effects.
  • 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 2-ring Pt100 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 ALPH temperature coefficient  AUTO-HOLD automatic function holding the displayed measurement BATT TOO LOW - CHNG NOW battery discharged - replace it immediately BAUDRATE baud rate value...

  • 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

    FUNCTION PRINT 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

    CONNECTION TO A PC HD2156.1 Connection to the PC with the cable:  HD2110CSNM: 8-pole MiniDin connector on one end and 9-pole Sub D connector on the other end;  C.206: 8-pole MiniDin connector on one end and USB type A connector on the other end. With integrated RS232/USB converter (requires the installation of the USB drivers).

  • 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 61010-1:2010 safety regulations 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 100M× cm / () Measurement range (Kcell=1) / Resolution 5.0…199.9× cm / 0.1× cm 200…999× cm / 1× cm 1.00k…19.99k× cm / 0.01k× cm 20.0k…99.9k× cm / 0.1k× cm 100k…999k×...
  • Page 46 Standard solutions automatically detected (@25°C) 147S/cm 1413S/cm 12880S/cm 111800S/cm Measurement of temperature by Instrument Pt100 measurement range -50…+200°C Pt1000 measurement range -50…+200°C Resolution 0.1°C Accuracy 0.25°C Drift after 1 year 0.1°C/year - 46 - HD2156 V2.5...

  • Page 47: Technical Data Of Probes

    TECHNICAL DATA OF PROBES ELECTRODES ORDERING MEASURING RANGE DIMENSIONS CODE AND USE 0…14pH / 0…80°C / 2bar Glass body - GEL filled 1 ceramic diaphragm Cable L=1m with BNC KP30 Waste water , Drinking wa- ter, Water emulsions, Gal- vanic, Paints, Varnish, Wa- ter suspensions, Fruit-juices Titration.

  • Page 48: Pt100 4- Wire Probes And Pt1000 2- Wire Probes Complete With Tp47 Module

    Pt100 4- Pt1000 2- TP47 WIRE PROBES AND WIRE PROBES COMPLETE WITH MODULE Model Type Application range Accuracy TP47.100.O Pt100 4 wires -50…+250°C Class A TP47.1000.O Pt1000 2 wires -50…+250°C Class A TP87.100.O Pt100 4 wires -50…+200°C Class A TP87.1000.O Pt1000 2 wires -50…+200°C Class A...

  • Page 49: Order Codes

    ORDER CODES HD2156.1 Kit including: instrument HD2156.1, 4 x 1.5V alkaline batteries, operating manu- al, case and DeltaLog9 software (downloadable from Delta OHM website). HD2156.2 Kit including: instrument HD2156.2 data logger, 4 x 1.5V alkaline batteries, op- erating manual, CP23 USB cable, case and DeltaLog9 software (downloadable from Delta OHM website).
  • Page 50 EDOX STANDARD SOLUTIONS HDR220 Redox standard solution 220mV 0,5 l. HDR468 Redox standard solution 468mV 0,5 l LECTROLYTE SOLUTIONS KCL 3M 100ml ready for use solution for refilling of the electrodes KP63, KP64, and KP90. LEANING AND MAINTENANCE HD62PT Diaphragm cleaning (tiourea in HCl) – 500ml. HD62PP Protein cleaning (pepsin in HCl) –...
  • Page 51 TP87.100.O Immersion probe, sensor Pt100 direct 4 wires. Probe's stem Ø 3mm, length 70mm. 4-wire connection cable with connector, length 2 metres. TP87.1000.O Immersion probe, sensor Pt1000. Probe's stem Ø 3mm, length 70mm. 2-wire connection cable with connector, length 2 metres. TP47 Only connector for probe connection: Pt100 direct 4 wires, Pt1000 2 wires.
  • Page 52 OTES - 52 - HD2156 V2.5...
  • Page 53 OTES - 53 - HD2156 V2.5...
  • Page 54 OTES - 54 - HD2156 V2.5...
  • Page 56 G U A R A N T E E TERMS OF GUARANTEE 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.
  • Page 57 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | sales@deltaohm.com The quality level of our instruments is the result of the constant development of the product. This may produce some differences between the information written in this manual and the instrument you have purchased.
  • Page 58 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | sales@deltaohm.com V2.5 01/09/2020...

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Delta ohm hd2156.2

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