Delta OHM HD3406.2 User Manual

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.

REV. 1.0

31 Jan. 2006

HD3406.2

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Conductivity meter – Thermometer

HD3406.2

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HD3406.2

1. Connectors.

2. Battery symbol: indicates the battery level. The symbol does not appear when the external

power supply is connected.

3. CAL key: it starts the conductivity probe calibration.

4. REL key: enables the relative measurement (displays the difference between the current va-

lue and the logged value when the key is pressed); in the menu, decreases the current value.

5. LOG/DUMP LOG key: during normal operation, starts and ends the saving of the data in

the internal memory; in the menu, starts the data transfer from the instrument's memory to
the PC.

6. χ-Ω-TDS Key: changes the main variable measurement between conductivity, resistivity,

total dissolved solids (TDS) and salinity.

7. SERIAL/ERASE LOG key: starts and ends the data transfer to the serial/USB communica-

tion port. In the menu, clears the data contained in the instrument's memory.

8. °C/°F key: when the probe is not connected, allows manual modification of the temperature.

When double pressed, changes the unit of temperature measurement from degrees Celsius to
Fahrenheit.

9. Function indicators.

10.  key: in the menu, confirms the current selection.

11. Line for symbols and comments.

12. Main display line.

13. ON-OFF/AUTO-OFF key: turns the instrument on and off. When pressed together with the

ENTER key, disables the automatic turn off.

14. MENU key: allows access to and exit from the menu.

15. ENTER key: in the menu, confirms the current selection; when pressed together with the

ON/OFF key, disables the automatic turn off.

16. ESC key: in the menu, cancels the operation in progress without making changes.

17. FUNC: key: during normal operation displays the maximum (MAX), the minimum (MIN)

and the average (AVG) of current measurements.

18. MAX, MIN and AVG symbols.

19.

Key : in the menu, decreases the current value.

20. Secondary display line.

21. External mains power supply connector input 12Vdc for ∅ 5.5mm - 2.1mm connector .

22. Not used

23. 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.

24. 8-pole MiniDin connector for RS232C connection using cable HD2110CSNM, for USB 2.0

connection using cable HD2101/USB, and for S-print-BT printer connection using cable
HD2110CSP.

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INTRODUCTION

The instrument series HD34… is made up of 4 bench top instruments for electrochemical measures:
pH, conductivity, dissolved oxygen, and temperature.

The HD3406.2 measures conductivity, liquid resistivity, total dissolved solids (TDS), and salin-
ity using combined 4-ring and 2-ring conductivity/temperature probes. Temperature is measured
by Pt100 or Pt1000 immersion, penetration or contact probes.
The probe can be calibrated either manually or automatically resorting to one or more of the 147μS,
1413μS, 12880μS or 111800μS/cm conductivity standard solutions

The displayed data can be stored (datalogger) and can be transferred to PC or serial printer thanks
to the multi-standard serial ports RS232C and USB2.0 and software DeltaLog9 (Version 2.0 or later
versions). The storing and printing parameters can be set from menu.

Display, printing and logging always show temperature in °C °F, and one of the parameters of con­ductivity measure (χ o Ω or TDS or NaCl).

Other common function of this instrument series include: Max, Min and Avg function, the Auto­HOLD function, the automatic turning off which can also be disabled.

The instruments have IP66 protection degree.

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KEYBOARD AND MENU DESCRIPTION

Foreword

The instrument keyboard is composed of single-function keys, like the MENU key, and double­function 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". When the instrument is in standard measurement mode, the main
function is active. The secondary function of the is enabled in the menu.
The pressing of a key is accompanied by a short confirmation beep: a longer beep sounds if the
wrong key is pressed.
Each key specific function is described in detail below.

ON-OFF key

The instrument is turned on and off using the ON/OFF key. Turning on enables all display seg­ments for a few seconds, starts an auto-test, and displays the current values of cell constant (CELL)
and temperature coefficient α (ALPH). Finally, it sets the instrument ready for normal measure­ment.

MIN

cm

min

s

2
3

m

µmk

>>>

During turning on, should no probes be connected, the last manually-set temperature ap­pears in the secondary line. The unit of measurement symbol (°C or °F) starts blinking,
and a letter "m" meaning "manual" appears next to the battery symbol.
The probe's data are captured upon turning the instrument on: if the ERR message ap­pears in the secondary line, it is necessary to turn the instrument off and then on again.
Replace the probes when the instrument is off.

+

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 dis­abled by holding the ENTER 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>
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.

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ENTER Key

In the menu, the ENTER key confirms the current parameter and then goes to the next one. Pressed
together with the ON/OFF key, disables the automatic turn off.

MENU Key

The first menu item is accessed by initially pressing on the MENU key; press ENTER to go to the
following items. To modify the item displayed, use the arrow keys ( and ). The current value is
confirmed by pressing the ENTER key and the display moves on to the next parameter. If pressing
ESC the setting is cancelled.

To exit the menu, press the MENU key at any time.

The menu items are listed in this order:

1) Management of memorized data: the message "LOG_DUMP_or_ERAS" (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. By pressing LOG/DumpLOG, the data transfer of the logged data on the
serial port is started: the "BAUD-RATE" must have previously been set to the maximum
value (please see the menu items described below and the paragraph "STORING AND
TRANSFERRING DATA TO A PERSONAL COMPUTER" on page 30).

2) sets the interval in seconds between two loggings or data transfers to the serial port. The in-

terval can be set from 0s, 1s, 5s, 10s, 15s, 30s, 60s (1min), 120s (2min), 300s (5min), 600s
(10min), 900s (15min), 1200s (20min), 1800s (30min) e 3600s (1 hour). If the value 0 is

set, SERIAL works on command: the sending of data to the serial port is performed
each time the key is pressed. Recording (LOG) is performed with one second intervals

even if the interval is set to 0. With an interval from 1 to 3600s, continuous data transfer is
started when the SERIAL key is pressed. To end the recording (LOG) and continuous data
transfer operations (SERIAL with an interval greater than 0), press the same key again.

3) Sleep_Mode_LOG (Automatic turning off during recording:): this function controls the

instrument's automatic turning off during logging, occurring between the capture of a sample
and the next one. When the interval is lower than 60 seconds, the instrument will always
remain on. With intervals greater than or equal to 60 seconds, it is possible to turn off the in­strument between loggings: it will turn on at the moment of sampling and will turn off im­mediately afterwards, thus increasing the battery life. Using the arrows select YES and con­firm using ENTER in order to enable the automatic turning off, select NO and confirm to
disable it and keep the instrument on continuously.

Note: even if Sleep_Mode_LOG=YES is selected, the instrument does not turn off for less
than one minute intervals.

4) Identifier of the sample being measured it is an automatically increased progressive num-

ber associated with the single PRINT function (print interval set to 0) for the printing of
labels. The index appears in the single sample printing together with date, time, conductivity
(liquid resistivity, total dissolved solids or salinity) and temperature. This menu item allows

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the value of the first sample to be set: each time the PRINT key is pressed, the identification
ID in the printing is increased by 1 allowing progressive measurement of all measured sam­ples. If the Auto-Hold function, described below in this chapter, is enabled, the print time in­terval is forced to zero. Pressing SERIAL only causes the print to occur when the measure­ment has stabilized (HOLD symbol still). Later, it is possible to repeat the print at will, but
while the HOLD mode is on, the sample identifier number is not increased. This is useful
when more labels must be printed with the same identification code without increasing the
code each time.
The message "SMPL ID UNT=RSET SER=PRNT" is scrolled in the comment line: using
the arrows ( and ) the currently measured sample identifier value can be changed.
By holding the °C/°F (Unit) key down the proposed number is rapidly set to zero.
The instrument's heading information will be printed using the SERIAL key.

5) AUTO-HOLD function: the instrument normally operates in continuous view mode (de-

fault setting). In this mode the displayed measurement is updated every second. If the Auto­Hold function is enabled, the instrument performs the measurement and when it stabilizes it
goes in HOLD mode. To update the display indication, press FUNC .
In the following figure you can see an example of the measurement process with the Auto­Hold function enabled. In the following figure you can see an example of the measurement
process with the Auto-Hold function enabled. A probe is immersed into a liquid at conduc-

tivity

χ

1

and, to perform the measurement, the FUNC key is pressed: The conductivity
measurement raises progressively reaching the final value. The HOLD symbol blinks. In the
stretch indicated by 1, the measurement remains stable for 10 seconds, within two digits: at
the end of this interval (point 2), the instrument goes into HOLD mode, presenting the final
stable value.

2 digit

10s

t

χ

χ

1

6) K CELL (Cell constant) sets the conductivity probe's cell constant nominal value. The val-

ues 0.1, 0.7, 1.0 and 10 cm-1 (with tolerances from –30% to +50% of nominal value) are
admitted. The cell constant must be inserted before starting the probe calibration. An ERR
signal is generated if the cell constant's actual value exceeds the limits –30% or +50% of
nominal value. In this case it is necessary to check that the value set is correct, that the cali­bration solutions are in good state, and then proceed with a new calibration.

The cell constant change entails resetting the calibration date: a new calibration updates the
calibration date.

7) LAST CAL m/d h/m (Last conductivity calibration): the display shows the month and

day (m/d) in the main line, and the hour and minutes (h/m) in the secondary line of the pre­vious calibration of the conductivity probe. This menu item cannot be modified. The calibra-

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tion year is not displayed. The cell constant change, using the K CELL parameter, resets the
date.

8) ALPH_T (Temperature coefficient αT): the temperature coefficient αT is the percentage

measurement of the conductivity variation according to temperature and is expressed in
%/°C (or %/°F). The admitted values vary from 0.00 to 4.00%/°C. Use the arrows ( and
) to set the desired coefficient αT, and confirm with ENTER.

9) REF_TEMP (reference temperature): it indicates the temperature to which the displayed

conductivity value is standardized and can be equal to 20°C or 25°C. Using the arrows (
and ), set the desired value and confirm with ENTER.

10) TDS (Conversion factor χ/TDS): it represents the ratio between the measured conductivity

value and the total quantity of dissolved solids in the solution, expressed in mg/l (ppm) or g/l
(ppt). This conversion factor depends on the nature of the salts present in the solution: in the
field of water quality treatment and control, where the main component is CaCO3 (Calcium
Carbonate), a value of 0.5 is usually used. For agriculture water, for fertilizers preparation,
and in hydroponics, a factor of about 0.7 is used. Using the arrows ( and ), set the de­sired value, selecting it in the 0.4…0.8 range, and confirm with ENTER.

11) RCD MODE (Record mode): the instrument captures a conductivity and a temperature

value every second. If the RCD MODE parameter is set to "conductivity" (factory default),
the maximum (MAX) and minimum (MIN) values displayed using FUNC refer to conduc­tivity: the indicated temperature is that measured at the maximum and minimum conductiv­ity and is not the maximum and minimum temperature.
If the RCD MODE parameter is set to "tp" (=temperature), the maximum and minimum
values displayed using FUNC refer to temperature: the indicated conductivity is that meas­ured at the maximum and minimum temperature and is not the maximum and minimum
conductivity.
Finally, if the RCD MODE parameter is set to "Indep" (=independent), the maximum and
minimum values displayed using FUNC are independent: the indicated conductivity and
temperature are the maximum and minimum measured values but are not necessarily re­ferred to the same measurement moment.

12) Probe type (the message "PRBE_TYPE" is scrolled in the comment line. The main line in

the center of the display shows the type of temperature probe connected to the instrument.
Conductivity/temperature combined probes with Pt100 or Pt1000 sensor, or temperature
only probes can be connected to the input:

• 4 wire PT100 using the TP47 module

• 2 wire PT1000 using the TP47 module

Upon being turned on, the instrument automatically detects the temperature probes: the

Probe Type menu item is configured by the instrument and cannot be modified by the user.
If no temperature probe or combined probe with temperature sensor is connected, the in­strument displays a dotted line (- - - -).

13) YEAR: to set the current year. Use the arrows to modify this parameter and confirm using

ENTER.

14) MNTH (month): to set the current month. Use the arrows to modify this parameter and con-

firm using ENTER.

15) DAY: to set the current day. Use the arrows to modify this parameter and confirm using

ENTER.

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16) HOUR: to set the current hour. Use the arrows to modify this parameter and confirm using

ENTER.

17) MIN: to set the current minutes. In order to correctly synchronize the minute, it is possible

to reset the seconds by pressing the °C/°F key. Use the arrows to set the current minute plus
one, and as soon as that minute is reached press °C/°F: this synchronizes the time to the
second. Press ENTER to go onto the next item.

18) BAUD_RATE: indicates the frequency used for the serial communication with the PC.

Values from 1200 to 38400 baud. Use the arrows to modify this parameter and confirm us­ing ENTER. The communication between instrument and PC (or serial port printer)
only works if the instrument and PC baud rates are the same. If the USB connection is
used this parameter value is automatically set (please see the details on page 30).

FUNC key

It enables the display and logging of the maximum (MAX), minimum (MIN) and average (AVG)
value of the conductivity, liquid resistivity, total dissolved solids, salinity and temperature meas­urements, updating them with the acquisition of new samples. The acquisition frequency is once a

second. Use the χ-Ω-TDS key to switch from conductivity to liquid resistivity, to total dissolved
solids or to salinity.

MAX, MIN and AVG measurements remain in the memory until the instrument is on, even after
exiting the calculation function. To reset the previous values and restart with a new measure­ment session, press FUNC until the message "FUNC CLR" appears, then use the arrows to se­lect YES and confirm using ENTER.

The conductivity (or resistivity or total dissolved solids or salinity) and temperature values
are displayed at the same time. According to settings in the "RCD Mode" menu item, the
maximum, minimum and average indications have different meanings: please see the descrip­tion of this MENU key.

Attention: the data captured using the Record function cannot be transferred to the PC.

ESC key

In the menu, the key clears or cancels the active function (ESC).

CAL key

It starts the conductivity probe (please see the paragraph dedicated to calibration page 15).

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REL Key

In measurement mode, it displays the difference between 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. The data logging frequency is set in the "Print and log interval"
menu parameter. The data logged between a start and subsequent stop represent a single session .

When the logging function is on, the LOG indication is displayed, the battery symbol blinks and a
beep is issued each time a logging occurs; the battery symbol does not appear when using an
external power supply.
To end the logging, press LOG.

If the Auto-HOLD function is enabled (please see the menu), the data logging is disabled.

The HD3406.2 can turn off during logging between one capture and the next: the function is
controlled 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
capture and the next if the parameter Sleep_Mode_LOG=YES.

>>>

Dump LOG

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 30.

χ-Ω-TDS (conductivity - resistivity - total dissolved solids - salinity) key

Changes the main variable measurement between conductivity, resistivity, total dissolved solids
(TDS) and salinity. The selected parameter is used for display, printing and logging.

The instrument has an Auto-Hold function, which can be set in the MENU, that "freezes" the meas­urement automatically when it has been stable (within 1 digit) for over 10 seconds: the message
HOLD is displayed.
To perform a new measurement, it is necessary to press the FUNC key.
The HOLD message starts blinking, while the display follows the actual measurement trend, until it
stabilizes again and the HOLD message remains still.

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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.
The printing operation is accompanied by the display of the RS232 symbol and the blinking of the
battery symbol; when using an external power supply the battery symbol does not appear.
Press SERIAL to end the continuous printing.

Before starting the printing with SERIAL, set the baud rate. To do so, select the Baud Rate menu
item and select the maximum value equal to 38400 baud by using the arrows. Confirm by pressing
ENTER.
The DeltaLog9 software for PC will automatically set the baud rate value during connection. If you

are using a different program than DeltaLog9, be sure the baud rate is the same for both the
instrument and the PC: the communication will only work in this way.

>>>

Erase memory

When pressed after the MENU key, the SERIAL key permanently erases all the data contained in
the instrument's memory.

°C/°F key

When the temperature probe is connected, the measured value is used to compensate the conductiv­ity measurement; the key changes the unit of measurement from degrees Celsius to Fahrenheit.
If the probe is not present, the compensation temperature must be entered manually: to manually
change the value shown in the display lower line, press °C/°F once. The temperature indicated starts
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 that temperature 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.

Up Arrow

When used in the menu, it increases the current variable value. During measurement, if the tempera­ture probe is not present, it increases the temperature value for conductivity compensation.

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Down Arrow

When used in the menu, it decreases the current variable value. During measurement, if the tem­perature probe is not present, it decreases the temperature value for conductivity compensation.

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CONDUCTIVITY MEASUREMENT

The instruments work with conductivity/temperature combined probes, 4-ring and 2-ring only con­ductivity 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:

• the liquid resistivity measurement (Ω, kΩ, MΩ),

• the concentration of total dissolved solids (TDS) according to the χ/TDS conversion factor,

which can be modified using the menu,

• the salinity (NaCl quantity in the solution, expressed in g/l).

The conductivity, resistivity, TDS or salinity indication is displayed in the main line, while the sec­ondary line shows the temperature.

The conductivity probes must be periodically calibrated. To facilitate this operation, four automatic
calibration solutions are provided:

• 0.001 Molar KCl solution (147μS/cm @25°C),

• 0.01 Molar KCl solution (1413μS/cm @25°C),

• 0.1 Molar KCl solution (12880μS/cm @25°C),

• 1 Molar KCl solution (111800μS/cm @25°C).

User calibration of the temperature sensors is not required.

The probes are detected during turn on, and this cannot be performed when the instrument is
already on, therefore if a probe is connected and the instrument is on, it must be turned off
and back on again.

Standard probe

The standard 4-electrode combined conductivity/temperature probe code is SP06T.
The cell measurement zone is delimited by a bell in Pocan. A positioning key, present in the probe's
end part, orients the bell correctly when the probe is introduced. For cleaning, simply pull the bell
along the probe's axis without rotating it.

It is not possible to perform measurements without this bell.

This probe's temperature measuring range is -50°C a +90°C.

4- ring or 2- ring probes

The conductivity HD3406.2 uses 4-electrode or 2-electrode 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. The 2- ring probes operate in a shorter measurement range but
with an accuracy comparable with the 4- ring probes.
The probes can be in glass or plastic: the first can work in presence of aggressive pollutants, the lat­ter are more resistant to collisions, and so more suitable for industrial use.

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Cells with temperature sensor

All probes are fitted with a built-in Pt100 or Pt1000 temperature sensor: the simultaneous measure­ment of conductivity and temperature allows automatic correction of the effect of the latter on the
solution conductivity.

Choosing the cell constant

The constant is a piece of information which characterizes the cell. It depends on its geometry and
is expressed in cm–1. There is no cell capable of measuring the entire conductivity scale accurately
enough. Consequently, cells with different constants are used allowing exact measurements on dif­ferent scales. The cell with constant K = 1cm

–1

allows measurements from low conductivity up to
relatively high conductivity.
The theoretical measurement cell is made of two 1cm2 metallic plates separated one from the other
by 1cm. This type of cell has a cell constant Kcell of 1cm–1. In essence, the number, form, material
and dimensions of the plates are very different from model to model, from manufacturer to manu­facturer.
The low constant K probes are preferably used for low conductivity values, the high constant ones
for high values.
The indicative measurement range is reported in the following diagram:

Automatic or manual conductivity compensation

The conductivity measurement refers to a standard temperature, called reference temperature
T_REF: that is, the instrument proposes the conductivity you would get if the temperature were
T_REF. This temperature could be 20°C or 25°C according to the setting in the T_REF menu item.
The conductivity increase per each grade of temperature variation is a characteristic of the solution
and is indicated by the term "temperature coefficient α

T

": admissible values from 0.00 to 4.00%/°C,
default value 2.00%/°C.
When a combined probe with temperature sensor is present, the instrument automatically applies
the temperature compensation function, and proposes the measurement using the reference tempera­ture T_REF according to the coefficient αT on the display.
In absence of the temperature probe, the lower display shows the manually set compensation tem­perature (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 indica­tion is printed on the print-outs. On the other hand, if the temperature probe is present, the AT sym­bol appears.

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15

To manually change the compensation temperature press the °C/°F key once: the indicated tempera­ture value starts blinking. Select the desired temperature value by using the arrows and confirm with
ENTER. The display stops blinking, and the temperature displayed is used for compensation.
To change the unit of measurement between °C and °F, press the °C/°F key twice.

Calibration of conductivity

The probe calibration can be carried out on one, two or three points using the standard solutions
automatically detected by the instrument (automatic calibration) or other solutions with known
value (manual calibration).
The CAL symbol will blink when the cell constant is modified using the menu (please see the de­scription of the K_CELL menu item on page 6).

Automatic calibration of conductivity using memorized standard solutions

The instrument can recognize four standard calibration solutions:

• 0.001 Molar KCl solution (147μS/cm @25°C),

• 0.01 Molar KCl solution (1413μS/cm @25°C),

• 0.1 Molar KCl solution (12880μS/cm @25°C),

• 1 Molar KCl solution (111800μS/cm @25°C),

Using one of these solutions, the calibration is automatic; the procedure can be repeated with one or
more of the remaining standard solutions.
The manual calibration is possible with a different conductivity solution from that used in the auto­matic calibration.

The solution temperature for the automatic calibration must be between 15°C and 35°C: if
the solution temperature is under 15°C or over 35°C, the calibration is rejected: CAL ERR
indication appears.

1. Turn the instrument on with the ON/OFF key.

2. Set the probe's cell constant by selecting it from the admitted values: 0.01, 0.1, 0.7, 1.0 o 10.0.

3. Dip the conductivity meter cell in the calibration solution until the electrodes are covered with

liquid.

4. Stir the probe lightly to remove any possible air inside the measurement cell.

5. Press the CAL key. The unit of measurement (μS/cm or mS/cm) appears on the comment line.

The central line shows the solution conductivity value at the measured temperature, or if the

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16

probe is not present, at the manually-set temperature. In the lower line, the closest temperature
compensated standard buffer value.

6. Press the CAL key. The unit of measurement (μS/cm or mS/cm) appears on the comment line.

The central line shows the solution conductivity value at the measured temperature, or if the
probe is not present, at the manually-set temperature. In the lower line, the closest temperature
compensated standard buffer value.

If the measurement is in TDS, resistivity or salinity, by pressing CAL, the instrument goes
automatically into conductivity calibration mode.

7. Press ENTER to confirm the displayed value. The cell constant nominal value (KCELL) and the

set temperature coefficient αT are displayed. Pressed repeatedly the ENTER key allows the cali­bration on the point to be repeated, for example, in order to obtain a more stable value.

8. To end the probe calibration, press ESC.

9. Rinse the probe with water. If you are then going to perform low conductivity measurements, we

recommend rinsing the probe using distilled or bidistilled water.

The instrument is calibrated and ready for use.

Manual calibration of conductivity using non memorized standard solutions

Manual calibration is possible at any calibration solution and temperature if it is within the instru­ment measurement limits and provided that you know the solution's conductivity at the temperature
at which the calibration is performed. Proceed as follows:

1. Turn the instrument on with the ON/OFF key.

2. Set the probe's cell constant by selecting it from the admitted values: 0.01, 0.1, 0.7, 1.0 or 10.0

3. Dip the conductivity meter cell into a known conductivity solution until the electrodes are cov-

ered with liquid.

4. Stir the probe lightly to remove any possible air inside the measurement cell.

5. Press MENU, and then FUNC/ENTER until the item ALPH appears. The temperature coeffi-

cient αT is displayed. Note down the value displayed as it must be set again at the end of the
procedure. Set the value to 0.00. This excludes the temperature compensation during the con­ductivity measurement.

6. Measure the temperature by pressing °C/°F. According to the temperature detected, determine

the calibration solution conductivity using the table specifying the conductivity according to
temperature.

7. Select the conductivity measurement by pressing χ-Ω-TDS.

8. 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. In the central line the
solution conductivity value is indicated according to the cell constant current settings.

9. Use the arrows to select the conductivity value determined at point 4 and confirm using EN-

TER. If the ERR indication appears, see the note below.

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17

10. The cell constant nominal value (KCELL) and the temperature coefficient αT set to 0 are dis-

played. Pressed repeatedly the ENTER key allows the calibration on the point to be repeated,
for example, in order to obtain a more stable value.

11. To end the probe calibration, press ESC.

12. Go back to the MENU and select ALPH: re-enter the temperature coefficient as it was before

the calibration.

13. Rinse the probe with water. If you are then going to perform low conductivity measurements,

we recommend rinsing the probe using distilled or bidistilled water.

The instrument is now calibrated and ready for use.

NOTES:

• Without having pressed ENTER at all, the calibration is interrupted by pressing ESC; the

previous values will continue to be used.

• Upon confirming the calibration by using ENTER, the instrument checks that the correction to

the conductivity does not exceed the 70% or 150% limits of the theoretical value. If the calibra­tion is rejected because it is considered to be excessively corrupted, the CAL ERR message will
appear, followed by a long beep. The instrument remains in calibration mode and maintains the
previous calibration values.

• The most frequent causes of error are due to the probe malfunctioning (deposits, dirt,…) or to the

standard solutions deterioration (bad preservation conditions, alteration due to pollution with dif­ferent conductivity solutions,…).

• If the measurement is in TDS, resistivity or salinity, on the pressing of CAL, the instrument goes

automatically in conductivity calibration.

Table of standard solutions at 147μS/cm, 1413μS/cm, 12.88mS/cm and 111.8mS/cm

The table reports the standard solutions automatically detected by the instrument according to tem­perature.

°C µS/ cm µS/ cm mS/ cm mS/c m

°C µS/cm µS/c m mS/ cm mS/ cm

15.0

121 1147

10.48 92.5

26.0

150 1440 13.13 113.8

16.0

124 1173 10.72 94.4

27.0

153 1467 13.37 115.7

17.0

126 1199 10.95 96.3

28.0

157 1494 13.62 117.7

18.0

128 1225 11.19 98.2

29.0

161 1521 13.87 119.8

19.0

130 1251 11.43 100.1

30.0

164 1548 14.12 121.9

20.0 133 1278 11.67 102.1

31.0

168 1581 14.37 124.0

21.0

136 1305 11.91 104.0

32.0

172 1609 14.62 126.1

22.0

138 1332 12.15 105.9

33.0

177 1638 14.88 128.3

23.0

141 1359 12.39 107.9

34.0

181 1667 15.13 130.5

24.0

144 1386 12.64 109.8

35.0

186 1696 15.39 132.8

25.0 147 1413 12.88 111.8

- -

18

DIRECT INPUT INTO Pt100 AND Pt1000 TEMPERATURE PROBE WITH TP47 MODULE

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 mini­mizing the sensor self-heating effects.

The 4 wire and 2 wire probes with direct input are checked for conformity with class A toler­ance according to norm IEC751 - BS1904 - DIN43760.

The temperature probes are automatically detected by the instrument (please see the description of
the Probe Type menu on page 8).

The °C or °F unit of measurement can be chosen for display, printing, and logging using the °C/°F
key.

How to measure

The temperature measurement by immersion is carried out by inserting the probe in the liquid for at
least 60mm; the sensor is housed in the end part of the probe.

In the temperature measurement by penetration the probe tip must be inserted to a depth of at least
60mm, the sensor is housed in the end part of the probe. When measuring the temperature on frozen
blocks it is convenient to use a mechanical tool to bore a cavity in which to insert the tip probe.

In order to perform a correct contact measurement, the measurement surface must be even and
smooth, and the probe must be perpendicular to the measurement plane.

So as to obtain the correct measurement, the insertion of a drop of oil or heat-conductive
paste is useful (do not use water or solvents). This method also improves the response time.

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 module TP47. The HD3406.2 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.

Instructions to connect the probe to the module are provided below.
The module is supplied complete with fairlead and gasket for 5mm maximum diameter cables.

- -

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. The wires coming from the conductivity cell are welded directly onto the 1 - 2 - 4 - 5
connector's pins.
On the left there are the 1…4 points on which the Pt100 or Pt1000 sensor wires must be welded.
The JP1…JP4 jumpers are in the center of the card. These must be left open:

1

2

3

4

Pt100 3 fil i

Pt1000

Ni1000

Not Used

Before welding, pass the probe cable through the fairlead and gasket.
Weld the temperature sensor wires as shown in the table:

Sensor TP47 card connection Jumper

Pt100 4 wires

None

Pt1000 2 wires

None

- -

20

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 Jumper

2-electrode

conductivity

probe

Internal view of the connector

Jumper between

pins 1 and 4

Jumper between

pins 2 and 5

4-electrode

conductivity

probe

Internal view of the connector

None

As an alternative, the Pt100 and Pt1000 sensors can be welded directly on the connector's pins
DIN45326, as reported in the following table:

Sensor Direct connection to the connector Jumper

Pt100 4 wires

Pt100

Internal view of the connector

None

Pt1000 2 wires

Pt1000

Internal view of the connector

Jumper between

pins 6 and 7

Jumper between

pins 3 and 8

- -

21

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 Jumper

2-electrode

conductivity

probe

Pt100 tempera-

ture sensor

Pt100

Internal view of the connector

Jumper between

pins 1 and 4

Jumper between

pins 2 and 5

4-electrode

conductivity

probe

Pt100 tempera-

ture sensor

Pt100

Internal view of the connector

None

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. Now the probe is ready.

- -

22

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. Do not bend or force the contacts when inserting the probe connector into the instrument.

4. Do not bend, deform or drop the probes, as this could cause irreparable damage.

5. Always select the most suitable probe for your application.

6. Do not use probes in presence of corrosive gases or liquids. The sensor container is made of

AISI 316 stainless steel, while the contact probe container is made from AISI 316 stainless steel
plus silver. Avoid contact between the probe surface and any sticky surface or substance that
could corrode or damage it.

7. Above 400°C and below –40°C, avoid violent blows or thermal shocks to Platinum temperature

probes as this could cause irreparable damage.

8. To obtain reliable measurements, temperature variations that are too rapid must be avoided.

9. Temperature probes for surface measurements (contact probes) must be held perpendicular

against the surface. Apply oil or heat-conductive paste between the surface and the probe in or­der to improve contact and reduce reading time. Whatever you do, do not use water or solvent
for this purpose. A contact measurement is always very hard to perform. It has high levels of
uncertainty and depends on the ability of the operator.

10. Temperature measurements on non-metal surfaces usually require a great deal of time due to the

low heat conductivity of non-metal materials.

11. Probes are not insulated from their external casing; be very careful not to come into contact with

live parts (above 48V). This could be extremely dangerous for the instrument as well as
for the operator, who could be electrocuted.

12. Avoid taking measurements in presence of high frequency sources, microwave ovens or large

magnetic fields; results may not be very reliable.

13. Clean the probe carefully after use.

14. The instrument is water resistant and IP66, but is not watertight and therefore should not be

immersed in water without closing the free connectors using caps. The probe connectors must
be fitted with sealing gaskets. Should the instrument fall into the water, check for any water in­filtration. Gently handle the instrument in such a way as to prevent any water infiltration from
the connectors' side.

Notes on conductivity measurement

The service life of a cell can be unlimited, provided that the necessary maintenance is performed
and that it does not break. Some of the most frequent problems and their possible solutions are re­ported below.

Measurement of conductivity different from the expected value. 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. Calibrate again using the appropriate standard.

- -

23

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 black Platinum cell, new platinum-coating of the electrode
could be necessary.

Cell constant value not accepted. Check that the standard solutions are in good condition, that the
probe's constant cell value coincides with that selected in the instrument and that the solution tem­perature is within the range 15…35°C.

- -

24

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

ERR

This appears if the conductivity/temperature probe is measuring a value
exceeding the set measuring range.

CAL

ERR

This appears when, during calibration, the read value exceeds the limits
of -30% or +50% of the buffer's value compensated for temperature or
the solution temperature is lesser than 15°C or higher than 35°C.

LOG

MEM

FULL

Memory full; the instrument cannot store further data, the memory space
is full.

CAL

blinking

No calibration has yet been effected, or the cell constant value has been
modified in the menu (please see the description of the K_CELL menu
item on page 7).

m

No probe with temperature sensor connected. The letter "m" indicates
that the displayed temperature was entered manually.

SYS

ERR

#

Instrument management program error. Contact the instrument's supplier
and communicate the numeric code # reported by the display.

CAL

LOST

Program error: it appears after turning on for a few seconds. Contact the
instrument's supplier.

BATT TOO LOW

CHNG NOW

Indication of insufficient battery charge appearing on turning on. The in­strument issues a long beep and turns off. Replace the batteries.

- -

25

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 α

T

AUTO HOLD

automatic function holding the displayed measurement

BATT TOO LOW - CHNG NOW

battery discharged - replace it immediately

BAUDRATE

baud rate value

COMM STOP

printing complete

COMM STRT

printing started

DAY_

day

DUMP_END

data transfer complete

DUMP_IN_PROG

data transfer in progress

FUNC CLR

max, min and average values clearing

FUNC CLRD

max, min and average values cleared

HOUR

hour

KCEL

Cell constant K

KOHM

measurement of resistivity in kΩ

LAST CAL m/d h/m

last calibration date month/day hour/minutes

LOG IN PROG

logging in progress

LOG MEM FULL

memory full

LOG_CLRD

memory data cleared

LOG_DUMP_OR_ERAS

transfer or erase data

LOG_STOP

logging complete

LOG_STRT

logging started

MIN >>> USE_UNIT_TO_ZERO SEC

minutes >>> use the UNIT key to reset the seconds

MNTH

month

MOHM

measurement of resistivity in MΩ

NaCl

measurement of salinity in g/l

OHM

measurement of resistivity in Ω

PLS_EXIT >>> FUNC RES_FOR_FACT ONLY

please exit using ESC >>> function reserved to factory calibra­tion

PRBE_TYPE

type of probe connected

PRNT AND LOG INTV

printing and logging intervals

PRNT INTV

printing interval

PROB COMM LOST

lost communication with probe

RCD MODE

record function operating mode (max, min, avg)

REF_TEMP

reference temperature

SLP_MODE_LOG

turning off during recording mode

SMPL ID REL=RSET SER=PRINT

identifier of the sample - REL=reset - SERIAL=print heading

SYS ERR #

program error number #

TDS

total dissolved solids

UNDR

minimum limit exceeded

YEAR

year

- -

26

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…

If you wish to continue using the instrument, remove the flat batteries and supply it using the exter­nal power supply. Data stored on memory are maintained even without power supply.

If the battery charge level is insufficient, the following message appears when you turn the in­strument on:

BATT TOO LOW

CHNG NOW

The instrument issues a long beep and turns off. In this case, replace the batteries or use the
external power supply, in order to turn the instrument back on.

In order to avoid data loss, the logging session is ended, if the HD3406.2 is logging and battery
voltage falls below the minimum operating level.

The battery symbol turns off when the external power supply is connected.

To replace the batteries, switch the instrument off and unscrew the battery cover counter clockwise.
After replacing the batteries screw the cover on clockwise.

After replacing the batteries, the menu parameters must be set again. To go to the next item
press ENTER; to return to measurement mode, press MENU.
In order to avoid losing the menu settings, before removing the batteries, connect the external
power supply.

- -

27

MALFUNCTIONING 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.

WARNING ABOUT BATTERY USE

• Batteries should be removed when the instrument is not used for an extended time.

• Flat batteries must be replaced immediately.

• Avoid batteries leaking.

• Always use good quality leakproof alkaline batteries. Sometimes on the market, it is possi-

ble to find new batteries with an insufficient charge capacity.

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.
The instrument may be exposed to strong vibrations.
The instrument may be exposed to steam, salt or any corrosive gas.

MAINTENANCE

The instrument case is made of ABS plastic and the protections are rubber: do not use any incom­patible solvent for cleaning.

In the conductivity/temperature combined probe the bell and the body of the probe are made of Po­can, the conductivity and temperature sensors are made of Platinum.
During the use control the compatibility of these materials with the liquid that you want to measure.
The probe must be preserved in a dry space. At regular intervals check that no deposits or corrosion
are present on the sensitive part of the probe.
Any possible deposits should be removed using detergent on a wet rag. Particularly resistant depos­its can be removed leaving the probe immersed in soap water for some hours and then rinsing it. Do
not allow hands to touch the electrodes after cleaning.

Do not use any abrasive product for cleaning.

- -

28

SERIAL INTERFACE AND USB

The HD3406.2 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. 32).

The instrument standard serial transmission parameters are:

• Baud rate 38400 baud

• Parity None

• N. bit 8

• Stop bit 1

• Protocol Xon/Xoff

It is possible to change the RS232C serial port baud rate by setting the "Baudrate" parameter in the
menu (please see page 9). The possible values are: 38400, 19200, 9600, 4800, 2400, 1200. The
other transmission parameters are fixed.
The USB 2.0 connection does not require the setting of parameters.

The instruments are provided with a complete set of commands and data queries to be sent via the
PC.

All the commands transferred to the instrument must have the following structure:

XYcr where: XY is the command code and cr is the Carriage Return (ASCII 0D)

Command Response Description

P0 & Ping (locks the instrument keyboard for 70 seconds)
P1 & Unlocks the instrument keyboard

S0 AT 21.3 1000

Captured measurements (24 characters) AT = automatic temperature
compensation, temperature

G0 Model HD3406 -2 Instrument model
G1 M=conductivity meter Model description
G2 SN=12345678 Instrument serial number
G3 Firm.Ver.=01-01 Firmware version
G4 Firm.Date=2004/06/15 Firmware date
G5 cal 0000/00/00 00:00:00 Calibration date and time
G6 Probe=Cond + Pt100 Type of probe connected to input
GB User ID=0000000000000000 User code (set with T2xxxxxxxxxxxxxxxx)
GC Immediate printing of data

K1

PRINTOUT IMMEDIATE
MODE

Stop printing data

K0 Start logging data
K4 & Stop logging data
K5 & Immediate printing of data
K7 & Enable REL function
K6 & Disable REL function
KP & Auto-power-off function=ENABLE
KQ & Auto-power-off function=DISABLE
LN &1999 Number of free pages in the flash memory
LD PRINTOUT OF LOG Print data logged in flash
LE & Erase data in flash memory

LUAn

&

Sets the unit of measurement for the temperature n=0 > °C

n=1 > °F

- -

29

Command Response Description

LUBn

&

Sets the unit of measurement for the conductivity n=0 > μS/cm
n=1 > Ω
n=2 > TDS
n=3 > NaCl

RA & # Reading of LOG/PRINT interval set
RP & 600 Battery level (Resolut. 0.01V)
RUA U= °C Temperature measurement unit
RUB U= uS Conductivity measurement unit

WA# &

Setting LOG/PRINT interval.
# is a hexadecimal number 0…D that represents the position of the in­terval in the list 0, 1, 5, 10, …, 3600 seconds.

WC0 & Setting SELF off
WC1 & Setting SELF on

Command characters are exclusively upper case characters. Once a correct command is entered, the
instrument responds with "&"; when any wrong combination of characters is entered, the instrument
responds with "?". The instrument response strings end with the sending of the CR command (Car­riage Return). The instrument does not send the LF command (Line Feed).
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.

- -

30

STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER

The HD3406.2 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. If necessary, the data stored in the memory can be
transferred to a PC later.

THE LOGGING FUNCTION

The Logging function allows the recording up to 36.000 data pair measurements [T-χ] registered by
the probes connected to the inputs. Logging always includes two parameters. Each data pair is com­posed of: temperature in °C or °F, conductivity or resistivity or TDS or NaCl.

The logged parameters are selected using the “°C/°F” and “χ-Ω-TDS” keys”.
The time interval between two consecutive measurements can be set from 1 second to 1 hour. The
logging starts by pressing the LOG key and ends by pressing the same key again: the data memo­rized in this way form a continuous block of samples.

See the description of the menu items on page 6.

If the automatic turning off option between two recordings (MENU >> Sleep_Mode_LOG) is en­abled, upon pressing the LOG key the instrument logs the first data and turns off. 15 seconds before
the next logging instant, it turns on again to capture the new sample, and then turns off.

The data stored in the memory can be transferred to a PC using the DUMP LOG command: MENU
>> LOG. During data transfer the display shows the message DUMP; to stop the data transfer press
ESC on the instrument or on the PC.

CLEARING THE MEMORY

To clear the memory use the Erase Log function (MENU >> SERIAL).
The instrument starts clearing the internal memory; at the end of the operation, it goes back to nor­mal display.

NOTES:

• Data transfer does not cause the memory to be erased; the operation can be repeated as many

times as required.

• The stored data remain in the memory independently of battery charge conditions.

• In order to print the data to a parallel interface printer, you must use a parallel-serial adaptor (not

supplied).

• The direct connection between instrument and printer via a USB connector does not work.

• Some keys are disabled during logging. The following keys work: ON/OFF, FUNC (Max-Min-

Avg) and SERIAL.

• The recording started with the display in Max-Min-Avg mode proceeds normally with the actual

measured values. Only the display shows respectively the Max, Min or Avg values.

• The logging is disabled, if the Auto-HOLD function is enabled.

• If the logging is started when the display is in REL mode, the relative values are logged.

• It is possible to activate both the logging (LOG) and direct transfer (PRINT) functions at the

same time.

- -

31

THE PRINT FUNCTION

The PRINT function sends the measurements taken in real time by the instrument inputs directly to
a PC. Print data units of measurements are the same as those used on the display. Printing always
includes two parameters. Each data pair is composed of: temperature in °C or °F, conductivity or

resistivity or TDS or NaCl. The printed parameters are selected using the “°C/°F”, and “χ-Ω-TDS”
keys.

The function is started by pressing SERIAL. The time interval between two consecutive prints can
be set from 1 second to 1 hour (please see the Print and log interval menu item on page. 6). If the
print interval is equal to 0s, by pressing SERIAL the single data is sent to the connected device. If
the print interval is higher than 0, the data transfer continues until the operator stops it by pressing
SERIAL again.

See the description of the menu items on page 6.

Connect the S-print-BT printer using cable HD2110CSP.

NOTES:

• The print out is formatted across 24 columns.

• Some keys are disabled during serial transmission. The following keys work: ON/OFF, FUNC

(Max-Min-Avg) and LOG.

• The FUNC key has no effect on the print-outs, only on the display.

• If the Auto-Hold function is enabled, the print time interval is forced to zero: pressing SE-

RIAL only causes the print to occur when the measurement has stabilized (HOLD symbol still).
Later, it is possible to repeat the print at will, but while the HOLD mode is on, the sample iden­tifier number is not increased. This is useful when more labels must be printed with the same
identification code without increasing the code each time.

• If the serial transfer is started when the display is in REL mode, the relative values are trans-

ferred.

• It is possible to activate both the logging (LOG) and direct transfer (PRINT) functions at the

same time.

- -

32

CONNECTION TO A PC

The connection to the RS232C 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 – 8-pole MiniDin
on the other end.

The instrument is supplied with the DeltaLog9 software (version from 2.0) that manages the con­nection, data transfer, graphic presentation, and printing operations of the captured or logged meas­urements.

The DeltaLog9 software is complete with "On-line Help" (also in PDF format) describing its
characteristics and functions.

The HD3406.2 instrument is compatible with the HyperTerminal communication program supplied
with the Windows operating systems (from Windows 98 to Windows XP

CONNECTION TO THE RS232C SERIAL PORT

1. The measurement instrument must be switched off.

2. Using the Delta Ohm HD2110CSNM cable, connect the measurement instrument to the first free

serial port (COM) of the PC.

3. Turn on the instrument and set the baud rate to 38400 (MENU >> ENTER until the Baud Rate

parameter >> select 38400 using the arrows >> confirm with ENTER). The parameter remains in
the memory until replacement of the batteries.

4. Launch the DeltaLog9 application and press CONNECT. Wait for the connection to occur and

follow the indications on the screen. For a description of the DeltaLog9 application, please refer
to its on-line Help.

CONNECTION TO THE USB 2.0 PORT

The USB connection requires the installation of the drivers. They are contained in the Delta-

Log9 CD-Rom (Version 2.0 or later versions).

Proceed as follows:

1. Do not connect the instrument to the USB port until you are expressly requested to do it.

2. Insert the DeltaLog9 CD-Rom, and select the “Install/Remove USB driver" item”.

3. The application checks the presence of the drivers on the PC: the installation starts if they are

not present; if they are already installed, the drivers are removed by pressing the key.

4. The installation wizard prompts the software user license: to proceed, the software usage

terms must be accepted - click on YES.

5. On the next page the folder where the drivers will be installed is indicated: confirm without

modifying.

6. Complete the installation by clicking on Finish. Wait few seconds until the DeltaLog9 page

appears.

7. Close DeltaLog9.

- -

33

8. Connect the instrument to the PC USB port. When Windows detects the new device, the "New

software installation wizard" is started”.

9. If you are asked for the authorization to search an updated driver, answer NO and continue .

10. In the installation window, select “Install from a list or specific location”.

11. In the next window select “Search for the best driver in these locations” and “Include this lo-

cation in the search”.

12. Using Browse, indicate the installation folder provided at point 5:

C:\Program Files\Texas Instruments\USB-Serial Adapter

Confirm with OK..

13. If you get the message that the software did not pass the Windows Logo testing, select “Con-

tinue”.

14. The USB driver are installed: at the end, click on “Finish .

15. The installation wizard requests the files location once more: repeat the just described

steps and provide the location of the same folder (see point 12).

16. Wait: the operation could take a few minutes..

17. The installation procedure is now complete: the device will be detected on each new connec-

tion automatically.

In order to check if the entire operation was successful, in CONTROL PANEL double click on
SYSTEM. Select "Device Manager" and connect the instrument to the USB port .
The following items should appear:

• “UMP Devices >> UMP3410 Unitary driver" and "Ports (COM and LPT) >> UMP3410 Se-

rial Port (COM#)" for Windows 98 e Windows Me,

• “Multiport serial boards >> TUSB3410 Device” and "Ports (COM and LPT) >> USB-

Serial Port (COM#)” for Windows 2000, NT e Xp.

When the USB cable is disconnected, these two items disappear and come back when it is con­nected again.

Notes.

1. If the instrument is connected to the USB port before installing the drivers, Windows signals the

presence of an unknown device: in this case, cancel the operation and repeat the procedure illus­trated at the beginning of this section.

2. In the documentation supplied with the DeltaLog9 CD-Rom, is included a detailed version of

this chapter with pictures. Moreover, the necessary steps to remove the USB drivers are reported.

- -

34

FUNCTIONING NOTES AND OPERATING SECURITY

Authorized use

Comply with the technical specifications outlined in the chapter “TECHNICAL CHARACTERIS­TICS” Its use is authorized only in conformity with the instructions written in this manual. Any dif­ferent use is considered improper.

General instructions on security

This instrument has been manufactured and tested according to safety regulation EN 61010-1 con­cerning electronic measurement instruments and was delivered ex factory in perfect security condi­tions.
Its regular functioning and operating security can be ensured only if all the normal safety measures
as well as the specifications described in this manual are complied with.
Its regular functioning and operating security can be ensured only within the climatic conditions
specified in the chapter “TECHNICAL CHARACTERISTICS”.

Do not use or store the instrument in ways and/or places in which there are:

• Quick environment temperature changes that could cause condensation.

• Corrosive or inflammable gases.

• Direct vibrations or shocks against the instrument.

• High intensity electromagnetic fields, static electricity.

If the instrument is moved from a cold to a hot environment, the condensation can disturb its func­tioning. In this case, you need to wait for the instrument to reach the environment temperature be­fore using it.

User obligations

The user of the instrument must ensure that the following regulations and directives concerning the
handling of hazardous materials are complied with:

 CEE directives on job safety
 National laws on job safety
 Accident prevention regulations

- -

35

INSTRUMENT TECHNICAL CHARACTERISTICS

Measured quantities

χ

, Ω, TDS, NaCl, °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

Protection degree IP66

Power

Batteries 3 type AA batteries

Autonomy (only batteries) 100 hours with 1800mAh alkaline batteries

Power absorbed with instrument off 20μA

Mains (cod. SWD10) Output mains adapter 100-240Vac/12Vdc-1A

Security of memorized data Unlimited

Time

Date and time Schedule in real time

Accuracy 1min/month max departure

Measured values storing

Type 2000 pages containing 18 samples each

Quantity 36000 pairs of measurements [χ or Ω o

TDS or NaCl] e [°C or °F]

Selectable storage interval 1s, 5s, 10s, 15s, 30s, 1min, 2min, 5min,

10min, 15min, 20min, 30min and 1hour

Interface RS232C

Type RS232C electrically isolated

Baud rate Can be set from 1200 to 38400 baud

Data bit 8

Parity None

Stop bit 1

Flow Control Xon/Xoff

Serial cable length Max 15m

Selectable print interval immediate or 1s, 5s, 10s, 15s, 30s, 1min,

2min, 5min, 10min, 15min, 20min, 30min
and 1hour

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36

USB interface

Type 1.1 - 2.0 electrically isolated

Connections

Input for temperature probes
complete with TP47 module pole male DIN45326 connector

Conductivity input 8-pole male DIN45326 connector

Serial interface and USB 8-pole MiniDin connector

Mains adapter 2-pole connector (positive at centre)

12Vdc/1A

Measurement of conductivity by instrument

Measurement range (Kcell=0.01) / Resolution 0.000…1.999μS/cm / 0.001μS/cm

Measurement range (Kcell=0.1) / Resolution 0.00…19.99μS/cm / 0.01μS/cm

Measurement range (Kcell=1) / Resolution 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) / Resolution 200…1999mS/cm / 1mS/cm

Accuracy (conductivity) ±0.5% ±1digit

Measurement of resistivity by Instrument

Measurement range (Kcell=0.01) / Resolution Up to 1GΩ⋅cm / (*)

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

Accuracy (resistivity) ±0.5% ±1digit

Measurement of total dissolved solids (with coefficient χ/TDS=0.5)

Measurement range (Kcell=0.01) / Resolution 0.00…1.999mg/l / 0.005mg/l

(*) The resistivity measurement is obtained from the reciprocal of conductivity measurement. Close to the bottom of the
scale, the indication of resistivity appears like reported in the table below.

K cell = 0.01 cm

-1

K cell = 0.1 cm-1

Conductivity

(μS/cm)

Resistivity

(MΩ⋅cm)

Conductivity

(μS/cm)

Resistivity

(MΩ⋅cm)

0.001 μS/cm 1000 MΩ⋅cm 0.01 μS/cm 100 MΩ⋅cm

0.002 μS/cm 500 MΩ⋅cm

0.02 μS/cm 50 MΩ⋅cm

0.003 μS/cm 333 MΩ⋅cm

0.03 μS/cm 33 MΩ⋅cm

0.004 μS/cm 250 MΩ⋅cm

0.04 μS/cm 25 MΩ⋅cm

… … … …

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37

Measurement range (Kcell=0.1) / Resolution 0.00…19.99mg/l / 0.05mg/l

Measurement range (Kcell=1) / Resolution 0.0…199.9 mg/l / 0.5 mg/l

200…1999 mg/l / 1 mg/l

2.00…19.99 g/l / 0.01 g/l

20.0…99.9 g/l / 0.1 g/l

Measurement range (Kcell=10) / Resolution 100…999 g/l / 1 g/l

Accuracy (total dissolved solids) ±0.5% ±1digit

Measurement of salinity

Measurement range / Resolution 0.000…1.999g/l / 1mg/l

2.00…19.99g/l / 10mg/l

20.0…199.9g/l / 0.1g/l

Accuracy (salinity) ±0.5% ±1digit

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

Automatic/manual temperature compensation 0…100°C con αT = 0.00…4.00%/°C

Reference temperature 20°C o 25°C that can be selected

χ/

TDS conversion factor 0.4…0.8

Cell constant K (cm-1) 0.01 - 0.1 - 0.7 - 1.0 - 10.0

Standard solutions automatically detected (@25°C)

147μS/cm

1413μS/cm

12880μS/cm

111800μS/cm

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

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TECHNICAL DATA OF PROBES

2 AND 4 ELECTRODE CONDUCTIVITY PROBES WITH TP47 MODULE

ORDER CODE

MEASURING RANGE

AND USE

DIMENSIONS

SP06T

K=0.7

5μS/cm …200mS/cm

0…90°C

4-electrode cell

in Platinum

Probe material Pocan

General use

Not heavy duty

Ø 17

156

20

Ø 12

16 50

D=5

SPT401.001

K=0.01

0.04μS/cm …20μS/cm

0…120°C

2-electrode cell in AISI 316

Ultra pure water

Measurement in closed-cell

SPT01G

K=0.1

0.1μS/cm …500μS/cm

0…80°C

2-electrode cell

in Platinum-wire

Probe material glass

Pure water

SPT1G

K=1

10μS/cm …10mS/cm

0…80°C

2-electrode cell in Platinum

wire

Probe material glass

General use heavy duty ,

average conductivity

SPT10G

K=10

500μS/cm …200mS/cm

0…80°C

2-electrode cell in Platinum

wire

Probe material glass

General use heavy duty,

high conductivity

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Pt100 4 –WIRE PROBES AND Pt1000 2-WIRE PROBES COMPLETE WITH TP47 MODULE

Model Type Application range Accuracy

TP47.100 Pt100 4 wires -50…+200°C Class A

TP47.1000 Pt1000 2 wires -50…+200°C Class A

TP87.100 Pt100 4 wires -50…+200°C Class A

TP87.1000 Pt1000 2 wires -50…+200°C Class A

Temperature drift @20°C 0.005%/°C

TP47 Module for the connection of Pt100 4-wire and Pt1000 2-wire probes to instrument series

HD34…, without amplifying electronics and linearization.

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ORDER CODES

HD3406.2K The kit is composed of: instrument HD3406.2 datalogger, for the measurement of

conductivity - resistivity - TDS - salinity - temperature, 3 1.5V alkaline batteries,
operating manual, software DeltaLog9 version 2.0.

The conductivity probes, temperature probes, standard reference solutions,
cables for data download to PC or printer have to be ordered separately

HD2110CSNM 8-pole connection cable Mini Din - Sub D 9-pole female for RS232C, for connec-

tion to PC without USB input.

HD2101/USB Connection cable USB 2.0 connector type A - 8-pole Mini Din for connection to

PC with USB input.

SWD10 Stabilized power supply at 100-240Vac/12Vdc-1A mains voltage.

S’print-BT Portable, serial input, 24 column thermal printer, 58mm paper width.

HD2110CSP Connection cable for instruments series HD34…to printer S’print-BT.

HD22.2 Laboratory electrode holder composed of basis plate with incorporated magnetic

stirrer, staff and replaceable electrode holder. Height max. 380mm. For ∅12mm
electrodes.

HD22.3 Laboratory electrode holder with metal basis plate. Flexible electrode holder for

free positioning. For Ø 12mm probes.

TP47 Module for the connection of Pt100 4-wire and Pt1000 2-wire probes to instru-

ment series HD34…, without amplifying electronics and linearization.

CONDUCTIVITY PROBES AND COMBINED CONDUCTIVITY AND TEMPERATURE PROBES

SP06T Combined conductivity and temperature 4-electrode cell in Platinum, body in Po-

can. Cell constant K = 0.7. Measurement range 5μS/cm …200mS/cm, 0…90°C.

SPT401.001 Combined conductivity and temperature 2- electrode cell in stainless steel AISI

316. Cell constant K = 0.01. Measurement range 0.04μS/cm …20μS/cm,
0…120°C. Measurement in closed-cell.

SPT01G Combined conductivity and temperature 2-electrode Platinum-wire cell, glass

body. Cell constant K = 0.1. Measurement range 0.1μS/cm …500μS/cm,
0…80°C.

SPT1G Combined conductivity and temperature 2-electrode Platinum-wire cell, glass

body. Cell constant K = 1. Measurement range 10μS/cm …10mS/cm, 0…80°C.

SPT10G Combined conductivity and temperature 2-electrode Platinum-wire cell, glass

body. Cell constant K = 10. Measurement range 500μS/cm …200mS/cm,
0…80°C.

STANDARD CONDUCTIVITY CALIBRATION SOLUTIONS

HD8747 Standard calibration solution 0.001mol/l equal to 147μS/cm @25°C - 200cc.

HD8714 Standard calibration solution 0.01mol/l equal to 1413μS/cm @25°C - 200cc.

HD8712 Standard calibration solution 0.1mol/l equal to 12880μS/cm @25°C - 200cc.

HD87111 Standard calibration solution 1mol/l equal to 111800μS/cm @25°C - 200cc.

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TEMPERATURE PROBES COMPLETE WITH TP47

TP47.100 Direct 4 wire Pt100 sensor immersion probe with connector. Probe's stem Ø 3mm,

length 230mm. 4 wire connection cable with connector, length 2 metres.

TP47.1000 Pt1000 sensor immersion probe. Probe's stem Ø 3mm, length 230mm. 2 wire con-

nection cable with connector, length 2 metres.

TP87.100 Pt100 sensor immersion probe. Probe's stem Ø 3mm, length 70mm. Connection

cable 4 wires with connector, length 1 metre.

TP87.1000 Pt1000 sensor immersion probe. Probe's stem Ø 3mm, length 70mm. Connection

cable 2 wires with connector, length 1 metre.

TP47 Module for the connection of Pt100 4-wire and Pt1000 2-wire probes to instru-

ment series HD34…, without amplifying electronics and linearization.
(the connection instructions are outlined on page 18).

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CONTENTS

INTRODUCTION ............................................................................................................................................................ 4

KEYBOARD AND MENU DESCRIPTION.................................................................................................................. 5

Conductivity measurement............................................................................................................................................ 13

Automatic or manual conductivity compensation................................................................................................... 14

Calibration of conductivity...................................................................................................................................... 15

Automatic calibration of conductivity using memorized standard solutions .......................................................... 15

Manual calibration of conductivity using non memorized standard solutions ........................................................16

Table of standard solutions at 147μS/cm, 1413μS/cm, 12.88mS/cm and 111.8mS/cm.......................................... 17

Direct input into Pt100 AND Pt1000 temperature probe with TP47 module........................................................... 18

How to measure ......................................................................................................................................................18

Instructions to connect the TP47 module for conductivity/temperature combined probes, 4 wire Pt100 probes and

2 wire Pt1000 probes............................................................................................................................................... 18

WARNINGS AND OPERATING INSTRUCTIONS.................................................................................................. 22

Notes on conductivity measurement ....................................................................................................................... 22

INSTRUMENT SIGNALS AND FAULTS .................................................................................................................. 24

LOW BATTERY WARNING AND BATTERY REPLACEMENT ......................................................................... 26

INSTRUMENT STORAGE........................................................................................................................................... 27

Maintenance................................................................................................................................................................. 27

SERIAL INTERFACE AND USB................................................................................................................................. 28

STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER........................................................ 30

The Logging function ..................................................................................................................................................30

Clearing the memory....................................................................................................................................................30

The PRINT function ................................................................................................................................................... 31

CONNECTION TO A PC............................................................................................................................................. 32

Connection to the RS232C serial port.......................................................................................................................... 32

Connection to the USB 2.0 port ................................................................................................................................... 32

Functioning Notes and Operating Security .................................................................................................................. 34

INSTRUMENT TECHNICAL CHARACTERISTICS .............................................................................................. 35

TECHNICAL DATA OF PROBES............................................................................................................................. 38

2 and 4 electrode conductivity probes with TP47 module ........................................................................................... 38

Pt100 4 –wire probes and Pt1000 2-wire probes complete with TP47 module.......................................................... 39

ORDER CODES............................................................................................................................................................. 40

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GARANZIA GUARANTEE

GARANTIE

GARANTIA

Questo certificato deve accompagnare l'apparecchio spedito al centro assistenza.
IMPORTANTE: La garanzia è operante solo se il presente tagliando sarà compilato in tutte le sue parti.

This guarantee must be sent together with the instrument to our service centre.
N.B.: Guarantee is valid only if coupon has been correctly filled in all details.

Le certificat doit porter le cachet du revendeur et la date d'achat. A défaut, la garantie sera comptée à partir
de la date de la sortie d'usine.

ATTENTION: Pour bénéficier de la garantie, le présent certificat doit obligatoirement accompagner l'appa­reil présumé défectueux.

Dieser Garantieschein muss der Spedition beigelegt werden, wenn das Gerät an das Kundendienstzent­rum gesandt wird.

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.

Instrument type

 HD3406.2

Serial number

RENEWALS

Date Date

Inspector Inspector

Date Date

Inspector Inspector

Date Date

Inspector Inspector

CE CONFORMITY

Safety

EN61000-4-2, EN61010-1 LEVEL 3

Electrostatic discharge EN61000-4-2 LEVEL 3

Electric fast transients EN61000-4-4 LEVEL 3

Voltage variations EN61000-4-11

Electromagnetic interference susceptibility IEC1000-4-3

Electromagnetic interference emission EN55020 class B