Delta OHM HD2306 Manuel utilisateur

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.

HD2306.0

REV. 1.3

Nov.

10th 2005

- -

Conductivity meter – Thermometer

HD2306

- -

HD2306.0

1. Input for probes, 8-pole DIN45326 connector.

2. Battery symbol: displays the battery charge level.

3. Function indicators.

4. Secondary display line.

5. DATA/ENTER key: during normal operation displays the maximum (MAX), the minimum

(MIN) and the average (AVG) of current measurements. To reset the previous values and restart

with a new measurement session, press DATA until the message "FUNC CLR" appears, then

use the arrows to select YES and confirm using ENTER. In the menu, confirms the current

selection.

6. χ/TDS key: selects the display of conductivity, resistivity, or total dissolved solids (TDS); in

the menu, resets the value set with the arrows. In calibration mode, allows you to exit

calibration.

7. key: in the menu, increases the current value. In calibration mode, increases the displayed

nominal buffer value.

8. °C/°F/MENU key: it allows selection of the unit of measurement; when pressed together with

the DATA key, it allows to open the menu. To exit the menu, press the MENU key at any time.

9. CAL: starts the calibration procedure.

10. /REL key: enables the relative measurement (displays the difference between the current

value and the logged value when the key is pressed); press the key again to return to the normal

measurement. In the menu, decreases the current value. In calibration mode, decreases the

displayed nominal buffer value.

11. ON-OFF/AUTO-OFF key: turns the instrument on and off.

12. MAX (maximum value), MIN (minimum value) and AVG (average value) symbols.

13. Main display line.

14. Line for symbols and comments.

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TABLE OF CONTENTS

1. GENERAL CHARACTERISTICS............................................................................................................................. 5

2. DESCRIPTION OF THE FUNCTIONS .................................................................................................................... 6

3. THE PROGRAMMING MENU ................................................................................................................................. 9

4. CONDUCTIVITY MEASUREMENT...................................................................................................................... 11

4.1 STANDARD PROBE................................................................................................................................................... 11

4.2 4-ELECTRODE OR 2-ELECTRODE PROBES ................................................................................................................. 12

4.3 CELLS WITH TEMPERATURE SENSOR ....................................................................................................................... 12

4.4 CHOOSING THE CELL CONSTANT ............................................................................................................................. 12

4.5 AUTOMATIC OR MANUAL CONDUCTIVITY COMPENSATION...................................................................................... 13

4.6 CALIBRATION OF THE PROBE................................................................................................................................... 13

4.6.1 Automatic calibration of conductivity using memorized buffer solutions ..................................................... 13

4.6.2 Manual calibration of conductivity using non memorized buffer solutions...................................................14

4.6.3 Table of buffer solution at 147μS/cm, 1413μS/cm, 12.88mS/cm and 111.8mS/cm ...................................... 16

4.7 DIRECT INPUT INTO Pt100 AND Pt1000 TEMPERATURE PROBES .............................................................................. 16

4.7.1 Temperature measurement ............................................................................................................................. 16

4.7.2 Connecting the TP47 connector ..................................................................................................................... 17

5. WARNINGS................................................................................................................................................................ 20

6. INSTRUMENT SIGNALS AND FAULTS .............................................................................................................. 21

7. INSTRUMENT STORAGE....................................................................................................................................... 21

8. LOW BATTERY WARNING AND BATTERY REPLACEMENT ..................................................................... 22

8.1 WARNING ABOUT BATTERY USE.............................................................................................................................. 22

9. NOTES ABOUT WORKING AND OPERATIVE SAFETY ................................................................................. 23

10. TECHNICAL CHARACTERISTICS .................................................................................................................... 24

10.1 TECHNICAL INFORMATION ON THE CONDUCTIVITY METER –THERMOMETER ...................................................... 24

10.2 ON LINE INSTRUMENT PROBES AND MODULES TECHNICAL DATA................................................... 26

10.2.1 2 and 4 electrode conductivity probes......................................................................................................... 26

10.2.3 4 wire Pt100 and 2 wire Pt1000 Temperature probes ................................................................................. 26

11. ORDER CODES ....................................................................................................................................................... 27

11.1 CONDUCTIVITY PROBES ........................................................................................................................................ 27

11.2 STANDARD CONDUCTIVITY CALIBRATION SOLUTIONS .......................................................................................... 27

11.3 TEMPERATURE PROBES ......................................................................................................................................... 27

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1. GENERAL CHARACTERISTICS

The Conductivity meter – Thermometer Model HD2306.0 is a portable instrument, fitted with a

large LCD display for excellent visualization of the measured data, that allows measurement of the

following:

•conductivity;

•liquid resistivity;

•total dissolved solids (TDS);

with combined 4-ring or 2-ring conductivity/temperature probes.

Temperature only is measured by Pt100 or Pt1000 immersion, penetration or contact probes.

The probe calibration can be performed automatically in one or more of the 147μS, 1413μS,

12880μS or 111,800μS/cm conductivity calibration solutions (see chapter 4).

Using the Max, Min and Avg function of this instrument respectively obtains the maximum,

minimum or average values.

Other available functions are:

•the relative measurement REL;

•the automatic turning off which can also be disabled.

See chapter 2 for further details.

- -

2. DESCRIPTION OF THE FUNCTIONS

The keyboard of the Conductivity meter – Thermometer Model HD2306.0 is composed of double-

function keys. The function on the key is the "main function", while the one above the key is the

"secondary function".

When the instrument is in standard measurement mode, the main function is active.

Once the Settings Menu has been opened, by pressing simultaneously the DATA+°C/°F keys, the

secondary function is enabled.

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.

This key has two functions:

•ON/OFF: to turn the instrument on press ON, to turn it off press OFF.

The turning on enables all display segments for a few seconds, starts an Auto-test including the

detection of the probe connected to the input, and sets the instrument ready for normal

measurement. The following is displayed:

MIN

min s

>>>

•AUTO/OFF: the AutoPowerOff function can be disabled by simultaneously pressing this key

and the "CAL" key when turning the instrument on.

During turning on, should no temperature probe 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.

Caution! Replace the probes when the instrument is 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. Press simultaneously the ON/OFF key

and the CAL key to disable this function.

In this case, remember to turn the instrument off using the ON/OFF key: disabling of the automatic

turning off is shown by the blinking battery symbol.

ON-OFF and AUTO-OFF key

Disabling of the automatic turning off

- -

The χ/TDS/ESC key has two functions:

•χ/TDS: pressing this key in sequence selects the display of: conductivity, resistivity, or total

dissolved solids (TDS).

•ESC: once the MENU has been opened with the DATA+°C/°F keys, the χ/TDS key will allow

to cancel the parameters set using the and arrows.

•In calibration mode, it allows to exit calibration.

The DATA key is used for the following functions:

•DATA: during normal measurement, by pressing this key once the maximum (MAX) value of

the measurements captured by the probe connected to the instrument is displayed, updating it

with the acquisition of new samples;

-by pressing this key again the minimum (MIN) value is displayed;

-by pressing this key a third time the average (AVG) value is displayed.

The acquisition frequency is once a second.

The MAX, MIN and AVG values remain in the memory until the instrument is on, even after

exiting the DATA display function. When the instrument is off, the previously memorized data

are cleared. Upon turning on, the instrument automatically starts memorizing the MAX, MIN

and AVG values.

To reset the previous values and start with a new measurement session:

•press DATA until the FUNC_CLRD message appears;

•use the and arrows to select YES;

•confirm by pressing DATA/ENTER.

•ENTER: once the MENU has been opened with the DATA+°C/°F keys, the DATA key will

perform the ENTER function and the MENU can be browsed and the displayed parameter

confirmed. In calibration mode, acquires the nominal buffer value.

Once the MENU has been opened with the °C/°F/MENU and DATA keys, the key will allow to

increase the value of the selected parameter.

ke

/TDS/ESC key

DATA/ENTER key

- -

The C/°F key is used for the following functions:

•°C/°F: pressing this key selects the unit of measurement of temperature in Celsius (°C) or

Fahrenheit (°F) degrees.

•MENU: in the menu five items can be set (see chapter 3):

•K CELL (Cell constant)

•ALPH_T (Temperature coefficient αT)

•REF_TEMP (Reference temperature)

•TDS (Conversion factor χ/TDS)

•Probe type

-the menu is opened by pressing simultaneously DATA+°C/°F: the first item of the instrument

programming menu will appear;

-use the and arrows to modify the displayed value;

-press DATA/ENTER to confirm the modification and go onto the next item;

-press χ/TDS ESC to cancel the modification;

-to exit the menu, press the °C/°F key again.

Press this key to start the calibration procedure (see chapter 4).

The "" key is used for the following functions:

•: once the MENU has been opened with the DATA+°C/°F keys, the key will allow to

decrease the value of the selected parameter.

•REL: it displays the difference between the current value and that measured on pressing the

key. The REL message is displayed on the left. To return to the normal measurement, press the

key again.

UNIT/MENU key

CAL key



/REL key

- -

3. THE PROGRAMMING MENU

To access to the menu press simultaneously the following keys:

The items to be set are listed (in this order):

1. K CELL (Cell constant):sets the conductivity probe's cell constant nominal value. The values

0.1, 0.7, 1.0 and 10 cm-1 (with tolerances from –30% to +50% of nominal value) are

admitted.

Caution! 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 previous calibration.

-use the and arrows to modify the displayed value;

-press DATA/ENTER to confirm the modification and go onto the next item;

-press χ/TDS /ESC to cancel the modification;

-to exit the menu, press the °C/°F key again.

2. ALPH_T (Temperature coefficient αT):the temperature coefficient αTis 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 and arrows to modify the displayed value;

-press DATA/ENTER to confirm the modification and go onto the next item;

-press χ/TDS /ESC to cancel the modification;

-to exit the menu, press the °C/°F key again.

3. 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.

-use the and arrows to modify the displayed value;

-press DATA/ENTER to confirm the modification and go onto the next item;

-press χ/TDS /ESC to cancel the modification;

-to exit the menu, press the °C/°F key again.

4. 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. The range is 0.4...0.8:

-use the and arrows to modify the displayed value;

-press DATA/ENTER to confirm the modification and go onto the next item;

-press χ/TDS /ESC to cancel the modification;

-to exit the menu, press the °C/°F key again.

- -

5. 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

•2 wire Pt1000

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 "- - - -".

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