Delta HD2105.2, HD2105.1 Operating Manual

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Operating manual

pH meters / thermometers

HD2105.1 – HD2105.2

www.deltaohm.com

Companies / Brands of GHM

English

Keep for future reference.

HD2105 - 2 - V2.3

CONTENTS

INTRODUCTION ..................................................................................................................................................... 3

KEYBOARD AND MENU DESCRIPTION ............................................................................................................ 8

pH MEASUREMENT ..............................................................................................................................................15

AUTOM ATIC OR M ANUAL pH COMPENSATION ..........................................................................................................16

pH ELECTRODE CALIBRATION .................................................................................................................................17

Temperature characteristics of Delta OHM buffer solutions ...............................................................................19

DIRECT INPUT INTO Pt100, Pt1000 AND NI1000 TEMPERATURE PROBES ...................................................................20

How to measure ................................................................................................................................................20

Instructions to connect the TP47 connector for 4-wire Pt100, Pt1000 and Ni1000 probes ...................................20

Direct connection of 4-wire Pt100 sensors .........................................................................................................22

WARNINGS AND OPERATING INSTRUCTIONS ..............................................................................................23

NOTES ON THE USE OF THE pH ELECTRODES ............................................................................................................24

INSTRUMENT SIGNALS AND FAULTS ..............................................................................................................25

LOW BATTERY WARNING AND BATTERY REPLACEMENT .......................................................................27

INSTRUMENT STORAGE .....................................................................................................................................28

SERIAL INTERFACE AND USB ...........................................................................................................................29

STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER ......................................................31

THE LOGGING FUNCTION - ONLY FOR HD2105.2 ......................................................................................................31

CLEARING THE MEMORY - ONLY FOR HD2105.2 ......................................................................................................31

THE PRINT FUNCTION ...........................................................................................................................................32

CONNECTION TO A PC ........................................................................................................................................33

CONNECTION TO THE RS232C SERIAL PORT OF THE INSTRUMENT .............................................................................33

CONNECTION TO THE USB 2.0 PORT OF THE INSTRUMENT - ONLY FOR HD2105.2 ......................................................33

NOTES ABOUT WORKING AND OPERATIVE SAFETY ..................................................................................34

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

TECHNICAL DATA OF PROBES ........................................................................................................................37

pH Electrodes ...................................................................................................................................................37

Redox Electrodes ..............................................................................................................................................39

4-wire Pt100 and 2-wire Pt1000 Probes .............................................................................................................39

Temperature probes Pt100 sensor using SICRAM module .................................................................................40

ORDER CODES ......................................................................................................................................................41

HD2105 - 3 - V2.3

INTRODUCTION

The HD2105.1 and HD2105.2 are portable instruments with a large LCD display. They measure the
pH, the mV, and the redox potential (ORP) in mV. They measure the temperature using Pt100 or
Pt1000 immersion, penetration or contact probes.
The electrode calibration can be carried out manually or automatically on one, two or three points
and the calibration sequence can be chosen from a list of 13 buffers.
The temperature probes are fitted with an automatic detection module, with the factory calibration
settings already being memorized inside.

The HD2105.2 is a datalogger. It memorizes up to 34,000 pH or mV and temperature samples
which can be transferred from the instrument connected to a PC via the RS232C serial port or USB

2.0 port. The storing interval, printing, and baud rate can be configured using the menu.
The HD2105.1 and HD2105.2 models are fitted with an RS232C serial port and can transfer the ac­quired measurements in real time to a PC or to a portable printer.
Display, printing and, for the model HD2105.2, storing always include temperature, in °C or °F, and
pH or mV.

The Max, Min and Avg function calculates the maximum, minimum or average values.
Other functions include: the relative measurement REL, the Auto-HOLD function, and the auto­matic turning off that can also be disabled.

The instruments have IP66 protection degree.

This manual describes the HD2105.1 and HD2105.2 models: if not otherwise specified, the de­scription is intended to be applicable to both models.

HD2105 - 4 - V2.3

Temperature-pH meter

HD2105.1

HD2105 - 5 - V2.3

HD2105.1

1. BNC connector for the pH/mV electrode.

2. 8-pole DIN45326 connector, input for Pt100 temperature probes with SICRAM module, 4-wire

direct Pt100 probes, 2-wire Pt1000 probes complete with TP47 module.

3. External auxiliary power supply connector input.

4. Battery symbol: displays the battery charge level.

5. Function indicators.

6. Secondary display line.

7. CAL/ key: during normal operation starts the pH electrode calibration; in the menu, in-

creases the current value.

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

(MIN) and the average (AVG) of current measurements; in the menu, confirms the current se­lection.

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

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

10. SERIAL key: starts and ends the data transfer to the serial communication port.

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

12. pH/mV-ESC key: when pressed for at least one second, changes the main variable measure-

ment between pH and mV. When the Auto-HOLD function is enabled, slight pressure updates
the measurement. In the menu, cancels the operation in progress without making changes.

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

When double pressed, changes the unit of measurement for the temperature between degrees
Celsius and Fahrenheit.

14. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed together with the

MENU key, disables the automatic turn off.

15. Electrode efficiency indicators.

16. MAX, MIN and AVG symbols.

17. Main display line.

18. Line for symbols and comments.

19. 8-pole MiniDin connector for RS232C. For the connection to PC (with cable HD2110CSNM or

C206) or printer (with cable HD2110CSNM).

HD2105 - 6 - V2.3

Temperature-pH meter

HD2105.2

HD2105 - 7 - V2.3

HD2105.2

1. BNC connector for the pH/mV electrode.

2. 8-pole DIN45326 connector, input for Pt100 temperature probes with SICRAM module, 4-wire

direct Pt100 probes, 2-wire Pt1000 probes complete with TP47 module.

3. External auxiliary power supply connector input.

4. Battery symbol: displays the battery charge level.

5. Function indicators.

6. Secondary display line.

7. CAL/ key: during normal operation starts the pH electrode calibration; in the menu, in-

creases the current value.

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

(MIN) and the average (AVG) of current measurements; in the menu, confirms the current se­lection.

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

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

10. SERIAL/ERASE LOG key: starts and ends the data transfer to the serial communication port.

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

11. 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.

12. Mini-USB type B connector for USB 2.0. For the connection to PC (with cable CP23).

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

14. pH/mV-ESC key when pressed for at least one second, changes the main variable measure-

ment between pH and mV. When the Auto-HOLD function is enabled, slight pressure updates
the measurement. In the menu, cancels the operation in progress without making changes.

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

When double pressed, changes the unit of measurement for the temperature between degrees
Celsius and Fahrenheit.

16. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed together with the

MENU key, disables the automatic turn off.

17. Electrodes efficiency indicators.

18. MAX, MIN and AVG symbols.

19. Main display line.

20. Line for symbols and comments.

21. 8-pole MiniDin connector for RS232C. For the connection to PC (with cable HD2110CSNM or

C206) or printer (with cable HD2110CSNM).

HD2105 - 8 - V2.3

KEYBOARD AND MENU DESCRIPTION

Foreword

The instrument keyboard is composed of single-function keys, like the MENU key, and double­function keys such as the ON-OFF/Auto-OFF key.
In the double-keys, the function in the upper part is the “main function”, while the one in the bottom
part is the “secondary function”. When the instrument is in standard measurement mode, the main
function is active. In the menu or in conjunction with the FUNC key, 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.

ON-OFF/Auto-OFF key

The instrument is turned on and off using the ON/OFF key. The turning on enables all display seg­ments for a few seconds, starts an auto-test including the detection of the temperature probe con­nected to the input, and sets the instrument ready for normal measurement.

MIN

cm

min

s

2
3

m

µmk

>>>

During turning on, should no probes be connected, the message "NO_PRBE_
SER_NUM" is displayed in the line for symbols for a few seconds, and in the secondary
line the last manually-set temperature appears. The unit of measurement symbol (°C or
°F) starts blinking, and a letter "m" meaning "manual" appears next to the battery sym­bol.
When the probe fitted with SICRAM module is inserted into a functioning instrument,
the "NEW_PROB_DET" (New probe detected) message appears: as the probe's data are
captured upon turning the instrument on, it is necessary to turn the instrument off and 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 dis-
abled by holding the MENU 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.

HD2105 - 9 - V2.3

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.

FUNC/ENTER key

During normal measurement this enables the display and logging of the maximum (MAX), mini­mum (MIN) and average (AVG) value of the pH, mV and temperature measurements, updating
them with the acquisition of new samples. The acquisition frequency is once a second.
In the menu, the ENTER key confirms the current parameter and then goes to the next one.
The 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 pH 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 item below.

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

CAL/ key

It increases the current parameter when used in the menu; when used in measurement mode, it
starts the pH electrode calibration (please see the chapter dedicated to calibration on page 17).

°C/°F key

When the temperature probe is connected, the measured value is used to compensate the pH 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.

pH/mV-ESC key

Changes the main variable measurement between pH and mV. The selected parameter is used for
display, printing, and logging.

HD2105 - 10 - V2.3

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 mV) for over 10 seconds: the message
HOLD is displayed.
To perform a new measurement, it is necessary to press the pH/mV key.
The HOLD message starts blinking, while the display follows the actual measurement trend, until it
stabilizes again and the HOLD message remains still.
NOTE: when the Auto-Hold function is enabled, the pH/mV key allows the pH measurement to be
relaunched, and the measurement in mV is disabled. To restore the display in mV, disable the
Auto-Hold function in the menu.

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

REL/ key

In measurement mode, displays for both measurements – mV and temperature – 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.
When used in the menu, it decreases the current variable value.

MENU Key

Upon turning on the instrument, the AutoPowerOff function can be disabled by holding the MENU
key down (please see the ON-OFF key description).
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 (only HD2105.2): the message “LOG_DUMP_or_E-

RAS” (Transfer data or erase) is scrolled in the comment line. The center figure reports
the number of free memory pages (FREE). All memory data are permanently erased by
pressing SERIAL/EraseLOG. 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 31).

2) Identifier of the sample being measured: it is an automatically increased progressive

number associated with the single PRINT function (print interval set to 0). The index ap­pears in the single sample printing together with date, time, pH or mV and temperature
measured values. This menu item allows 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

HD2105 - 11 - V2.3

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 REL=RSET SER=PRINT" is scrolled in the comment line: using
the arrows ( and ) the currently measured sample identifier value can be changed.
By holding the REL/ key down the proposed number is rapidly set to zero.
The instrument's heading information will be printed using the SERIAL key.

3) AUTO-HOLD function: the instrument normally operates in continuous view mode,

which is set by default. In this mode the displayed measurement is updated every second. If
the Auto-Hold function is enabled, the instrument performs the measurement and when it
stabilizes it goes in HOLD mode. To update the display indication, press pH/mV (please see
the description of the pH/mV key for further explanation).
In the following figure you can see an example of the measurement process with the Auto­Hold function enabled. An electrode is immersed into a liquid and, to perform the measure­ment, the pH/mV key is pressed: The pH 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

p

H

pH

1

To perform a new measurement, it is necessary to press again the pH/mV key.

4) Print and log interval: sets the interval in seconds between two loggings or data transfers

to the serial port. The interval can be set at 0, 1s, 5s, 10s, 15s, 30s, 60s (1min), 120s (2min),
300s (5min), 600s (10min), 900s (15min), 1200s (20min), 1800s (30min) and 3600s (1hour).

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 sec-

ond 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.

5) Sleep_Mode_LOG (Automatic turning off during recording) (only HD2105.2): 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.

HD2105 - 12 - V2.3

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

6) LAST CAL m/d h/m (Last pH 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 last pH electrode
calibration. This menu item cannot be modified. The calibration year is not displayed.

7) pH RES: selects the number of leading digits for the pH measurement: using the arrows se-

lect 1.23 to obtain the pH hundredths or 1.234 to obtain the thousandths. The chosen resolu­tion is applied to the new logged measurements, while the previous choice still applies for
the already memorized ones.

8) BUFR_1 (First buffer): selects the value of the first buffer for the pH electrode calibration.

The preset buffers are compensated for temperature. The ATC indication is displayed in the
lower line. The USER buffer, defined by the user, is not compensated for temperature: to
change its value, go to the "SET USER BUFR" step.

Please see the paragraph dedicated to calibration on page 17.

9) BUFR_2 (Second buffer): selects the value of the second buffer for the pH electrode cali-

bration. No buffer solution values too close (less than 2pH) to the first buffer are proposed.
This is also true for the USER buffer, defined by the user at the "SET USER BUFR" step: if,
for example BUFR_1=6.860 and USER=5.000, the BUFR_2 USER does not appear among
the values because it is too close to BUFR_1. The selection NIL (=no buffer) disables the
current buffer. The USER buffer, defined by the user, is not compensated for temperature.

Please see the paragraph dedicated to calibration on page 17.

10) BUFR_3 (Third buffer): selects the value of the third buffer for the pH electrode calibra-

tion. No buffer solution values too close (less than 2pH) to the first two buffers are pro­posed. This is also true for the USER buffer, defined by the user at the "SET USER BUFR"
step: The selection NIL (=no buffer) disables the current buffer. The USER buffer is not
compensated for temperature.

Please see the paragraph dedicated to calibration on page 17.

11) SET USER BUFR (Set user buffer): this is a buffer whose value can be defined by the

user using the arrows; all values from 0 to 14pH are available. This buffer is not compen­sated for temperature, so the buffer value must be set at the actual solution temperature. As
an alternative, the correct value according to temperature can be set in the calibration phase.

12) RCD MODE (Record mode): the instrument captures a pH/mV and a temperature value

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

13) 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 probe connected to the instrument. The following
probes can be connected to the input:

HD2105 - 13 - V2.3

• temperature probes Pt100 complete with SICRAM module

• 4 wire Pt100 probes through module TP47

• 2 wire Pt1000 probes through module TP47

• 2 wire Ni1000 probes through module TP47

The probes fitted with SICRAM module are automatically detected by the instrument upon
turning on: the Probe Type menu item is configured by the instrument and cannot be modi-

fied by the user.

If the direct 4-wire Pt100, Pt1000 and Ni1000 temperature probes are connected, the mes­sage "NO_PRBE_SER_NUM" appears when turning on. In this case the probe type must be
entered manually. Select Probe type using the MENU key and then select the type of probe
with the arrow keys; confirm using ENTER.

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

ENTER.

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

firm using ENTER.

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

ENTER.

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

ENTER.

18) MIN (minutes): 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.

19) 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 31).

LOG/DUMP LOG key - only HD2105.2

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 block.
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 HD2105.2 can turn off during logging between a capture and the next one: 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.

HD2105 - 14 - V2.3

>>>

Dump LOG - only HD2105.2

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 31.

SERIAL key - only HD2105.1

SERIAL/EraseLOG key - only HD2105.2

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 - only HD2105.2

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

HD2105 - 15 - V2.3

pH MEASUREMENT

The instrument works with pH measurement electrodes, redox potential measurement electrodes
(ORP), and specific ion electrodes. The pH measurement must always be accompanied by a tem­perature measurement. The probes with 4-wire Pt100, 2-wire Pt1000 or Ni1000 sensors may be
used for measuring temperature or for the automatic compensation of the Nernst coefficient with the
pH electrode.

Some probes are fitted with SICRAM module that acts as an interface between the sensor on the
probe and the instrument. There is a microprocessor circuit with a permanent memory inside the
module that enables the datalogger to recognize the type of probe connected and to read its calibra­tion information.

The fitted with SICRAM module are automatically detected while the direct 4-wire Pt100, the
Pt1000 and Ni1000 temperature probes are not automatically detected by the instrument and must
be set up in the Probe type menu item (please see the description of the menu on page 12).

The pH or mV indication is displayed in the main line; the secondary line shows the temperature.

The electrode for pH measurement

The electrode for pH measurement, generally in glass, generates an electrical signal proportional to
the pH according to Nernst law. Of this signal the following aspects are considered:

Zero point: The pH where the electrode generates a potential of 0 mV. In most electrodes, this value
is found at about 7pH.

Offset or Asymmetry Potential: mV generated by an electrode when immersed in a buffer solution at
7pH. Generally oscillates between ± 20 mV.

Slope: response of the electrode expressed in mV per pH units. The theoretical electrode slope at
25°C is 59.16 mV/pH. When the electrode is new the slope is close to the theoretical value.

Sensitivity: it is the electrode's slope expression in relative terms. It is obtained by dividing the ac­tual value of the slope by the theoretical value, and is expressed as a %. The asymmetry potential
and the slope vary in time with the use of the electrode, which necessitates regular calibration.

The pH electrodes must be calibrated using the buffer solutions (see the calibration chapter below).
The ORP and specific ion electrodes do not need calibration as their absolute voltage is measured.

The redox buffer solutions are only used to check the quality of a redox electrode.
No calibration of the temperature sensor is required by the user: the sensor is calibrated in
the factory and the Callendar Van Dusen parameters are recorded in the SICRAM module.

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 is necessary to turn it
off and on.

HD2105 - 16 - V2.3

AUTOMATIC OR MANUAL pH COMPENSATION

In a correct measurement of pH, the results need to be expressed together with the temperature
value at which the reading is performed.
The electrode slope varies according to the temperature in a known mode according to Nernst law:
e.g., a 1pH variation, that at 25°C means 59.16mV, at 100°C means 74.04mV.

6pH 7pH

pH

8pH

74.04mV

-74.04mV

59.16mV

-59.16mV

54.20mV

-54.20mV

0mV

mV

T=100°C, 74.04mV/pH

T=25°C, 59.16mV/pH

T=0°C, 54.20mV/pH

When a temperature probe is present, the instrument automatically applies the ATC automatic tem­perature compensation function. To disable it, the temperature probe must be disconnected.
If the temperature probe is not present, and the correct value is not entered manually, the extent of
the error committed in pH measurement is proportional to temperature and pH value itself.

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.
Moreover, on the main display an “m” (manual) is turned on near the battery symbol (if present).
On the print-outs, the MT indication is printed. Instead, if the probe is present, the AT symbol is
printed.

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

HD2105 - 17 - V2.3

pH ELECTRODE CALIBRATION

The electrode calibration is used to compensate the zero potential and slope deviations to which the
electrode is subject with time.
The calibration frequency depends on the accuracy desired by the user and by the effects that the
measured sample have on the electrode. Generally, we recommend daily calibration, but it is the
user's responsibility from personal experience, to establish the most appropriate frequency.
The calibration may be carried out using 1, 2 or 3 points. When using 1 point, the electrode offset is
corrected, with 2 points the offset and the gain is corrected; finally, in case a three points calibration
is carried out two offsets and two slopes are calculated, the second point is the one in which the
zero is performed.

The instrument has a memory of 13 buffers with relevant temperature compensation tables (ATC)
plus an “User” buffer, not compensated. The three buffers can be selected by using the BUFR_1,
BUFR_2, BUFR_3 menu items. Usually one for the acid, one for the neutral, and one for the alka­line band will be selected:

@25°C

BUFR_1 (NEUTRAL)

6.860

6.865 7.000 7.413 7.648

BUFR_2 (ACID)

1.679 2.000 4.000 4.008

4.010

BUFR_3 (ALKALINE)

9.180

9.210 10.010

The buffers in bold are predefined in the factory, these are the “DeltaOHM” ones.

If electrode calibration was not carried out on the instrument, or the batteries have been
changed or the last calibration failed, the display blinks the CAL message.

Calibration procedure

1) Insert the temperature probe and the electrode in the solution of a calibration buffer. If no tem-

perature probe is available, use another thermometer and enter the value manually as indicated in
the paragraph “Automatic or manual pH compensation”.

2) The electrode calibration mode is started by pressing CAL.

3) Among the three prepared buffers, the instrument automatically detects the closest to the pH

value being read and flags it up on the lower display.
If the buffer is not detected the first buffer BUFR_1 is proposed.

4) At this point the CAL symbol is not blinking on the display and the following is shown from the
upper side downward:
a) the chosen buffer nominal value at 25°C (scrolling indication)
b) the pH measurement value with the current calibration
c) the temperature compensated buffer value

The detected and temperature compensated buffer value, shown in the lower line, can be modi­fied using the arrows.

HD2105 - 18 - V2.3

5) To proceed with the calibration press ENTER. The electrode offset mV value (OFFS) is shown
on the display for few seconds.
After a few seconds the instrument shows the measurement again, corrected according to the
new calibration, but remains in calibration mode.
Pressed repeatedly the ENTER key allows the calibration on the point to be repeated, for exam­ple, in order to obtain a more stable value.

6) To end the electrode calibration, press pH/mV (ESC) to exit calibration, or continue the calibra­tion for the second point.

7) Extract the electrode from the buffer, clean it carefully, and insert it in the following buffer.

8) Press MENU.

The instrument displays the value detected on the new buffer: continue by repeating the steps from
point 3.

NOTES:

• After calibration, the instrument displays an electrode quality indication:

• No signal: electrode functioning.

• 1 small square blinking on the lower right: electrode almost exhausted.

• 2 small squares blinking on the lower right: electrode exhausted to be replaced.

• The 3 point calibration must always be carried out according to the fixed sequence:

NEUTRAL>>ACID>>BASIC. The basic buffer must be the last in the sequence.

• Without having pressed ENTER at all, the calibration is interrupted by pressing pH/mV
(ESC); the previous values will continue to be used.

• The buffers are always presented in the sequence set in the menu with the BUFR_1-BUFR_2-
BUFR_3 parameters. The 2 point calibration is possible using the sequence BUFR_1-BUFR_2
or BUFR_2-BUFR_3 or even BUFR_1-BUFR_3. The 3 point calibration is only possible us-

ing the exactly described sequence BUFR_1-BUFR_2-BUFR_3.

Allowed calibration sequences:

Number of

calibration

points

1 BUFR_1 BUFR_2 BUFR_3

2 BUFR_1 - BUFR_2 BUFR_2 - BUFR_3 BUFR_1 - BUFR_3

3 BUFR_1 - BUFR_2 - BUFR_3

• A buffer can be disabled in the option selection phase (MENU mode) by choosing the NIL
value. In this case, the disabled buffer is excluded from the sequence and will not be proposed.

• If no other buffer is expected after the first, as the BUFR_2 and BUFR_3 have been set to NIL,
the calibration mode is exited by pressing MENU.

• In any case where no operation is performed, the calibration mode automatically stops af-
ter 60 seconds.

• If the calibration is rejected by the instrument because it is considered to be excessively cor-
rupted, the CAL ERR message will appear, followed by a long beep. The instrument remains in
calibration mode and maintains the previous calibration values: at this point, if the calibration is
interrupted using ESC, the instrument signals the anomaly through the CAL message blinking.

HD2105 - 19 - V2.3

Temperature characteristics of Delta OHM buffer solutions

The 13 standard buffers reported in the table on page 17 are memorized in the instruments with
relevant variations according to temperature: The characteristics of the three Delta Ohm standard
buffers at 6.86pH, 4.01pH and 9.18pH (@25°C) are reported below.

6.86 pH @ 25°C 4.01 pH @ 25°C

°C pH °C pH °C pH °C pH

0 6.98 50 6.83 0 4.01 50 4.06

5 6.95 55 6.83 5 4.00 55 4.07
10 6.92 60 6.84 10 4.00 60 4.09
15 6.90 65 6.85 15 4.00 65 4.10
20 6.88 70 6.85 20 4.00 70 4.13
25 6.86 75 6.86 25 4.01 75 4.14
30 6.85 80 6.86 30 4.01 80 4.16
35 6.84 85 6.87 35 4.02 85 4.18
40 6.84 90 6.88 40 4.03 90 4.20
45 6.83 95 6.89 45 4.05 95 4.23

9.18 pH @ 25°C

°C pH °C pH

0 9.46 50 9.01

5 9.39 55 8.99
10 9.33 60 8.97
15 9.28 65 8.94
20 9.22 70 8.92
25 9.18 75 8.90
30 9.14 80 8.88
35 9.10 85 8.86
40 9.07 90 8.85
45 9.04 95 8.83

HD2105 - 20 - V2.3

DIRECT INPUT INTO Pt100, Pt1000 AND NI1000 TEMPERATURE PROBES

The instrument accepts the direct input of Platinum temperature probes with a 100Ω, 1000Ω resis­tance and Nickel temperature probes with a 1000Ω resistance.
The Pt100 are connected to 4 wires, the Pt1000 and Ni1000 to 2 wires, with the excitation current
chosen minimizing the sensor self-heating effects.
All probes with SICRAM module are calibrated in the factory; the 2 or 4-wire probes with direct
input are checked for conformity with class A tolerance according to norm IEC751 - BS1904 ­DIN43760.
The probes with SICRAM module are detected by the instrument; the model configuration is re­quired for the other probes (please see the description of the Probe Type menu item on page 12).

The °C or °F unit of measurement can be chosen for display, printing, and logging using the °C/°F­ESC 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 connector for 4-wire Pt100, Pt1000 and Ni1000 probes

All Delta Ohm probes are provided with a connector. The HD2105.1 and HD2105.2 instruments
also work with direct 4-wire Pt100, Pt1000 and Ni1000 probes manufactured by other producers:
for the instrument connection is prescribed the TP47 connector to which the probe's wires should be
welded.

The instructions to connect the Platinum or Nickel probe to the TP47 module are provided below.
The module is supplied complete with fairlead and gasket for 5mm maximum diameter cables.

HD2105 - 21 - V2.3

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 probe must be connected is housed in­side. On the left there are the 1…4 points on which the sensor wires must be welded. The JP1…JP4
jumpers are in the center of the board. These must be closed with a tin bead for some type of sen­sors:

1

2

3

4

Pt100 3 wires

Pt1000

Ni1000

Not Used

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

Sensor TP47 card connection Jumper to close

Pt100 4 wires

4

JP4

3

JP3

1

JP1

2JP2

Pt100
4 wires

None

Pt1000 2 wires

JP4

4

JP3

3

JP1

1

JP22

Pt1000
2 wires

JP2

Ni1000

JP4

4

JP3

3

JP1

1

JP2

2

Ni1000
2 wires

JP3

HD2105 - 22 - V2.3

Ensure the welds are clean and perfect. Once the welding operation is complete, close the two
shells, insert the gasket in the module, and 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.

Direct connection of 4-wire Pt100 sensors

4-wire Pt100 sensors can be soldered

directly to the pins of the free female
connector without making use of the
TP47 board. The 4 wires of the Pt100
sensors have to be soldered as indicated
in the figure on the left.
In order to use this type of probe it is
necessary to set up the menu item
“Probe Type” as described at page 12.
The P100 probe is recognized upon
turning on the instrument: connect the
probe when the instrument is switched
off and then turn it on.

Sensor Direct soldering to the connector

Pt100 4 wires

View of the soldering side

of the free female connector

HD2105 - 23 - V2.3

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.

HD2105 - 24 - V2.3

NOTES ON THE USE OF THE pH ELECTRODES

The average life of a pH electrode is about 1 year, depending on the use and maintenance.

The electrodes used at high temperatures or in strong alkaline environments normally have a shorter
life.

The new electrodes should be conditioned for half a day immersed in a 6.86pH or 4pH buffer.

Calibrate the electrode using buffer solutions close to the values to be measured. A new electrode
should always be calibrated at neutral pH (6.86pH) as first point, and at least in a second point.

Following are listed some problems that frequently occur and the possible solutions.

Wrong pH measure. Perform the following checks:

Check the diaphragm is not blocked and if necessary clean it using HD62PT solution.

Check the reference system is not polluted and, if the electrode is refillable, replace the electrolyte.

Check that the tip of the electrode has no air bubbles inside and that the electrode is sufficiently
immersed.

Even residues of dirt deposited on the membrane can alter the measure: use the solution for protein
cleaning HD62PP.

Slow response and wrong measures. A possible cause can be the aging or the erosion of the
membrane, or a short-circuit in the connector.

Storage. Store the electrode immersed in the solution HD62SC.

HD2105 - 25 - V2.3

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 message appears if the pH measurement exceeds the

-2.000pH…19.999pH limits, if the mV measurement exceeds the
±2.4V limits, if the temperature probe, already detected by the instru-

ment, is disconnected. At the same time an intermittent beep is issued.

PROB COMM LOST

This appears if the probe, has already been detected by the instrument,
but is disconnected. At the same time an intermittent beep is issued.

OVER

Measurement overflow: this appears when the probe measures a value
exceeding the measurement range or the mV measurement is included
in the +2.0…+2.4V range.

UNDR

Measurement overflow: this appears when the mV measurement is in­cluded in the -2.4…-2.0V range.

LOG

MEM

FULL

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

NEW PROBE DET

This message appears when a probe is inserted into a functioning in­strument. Turn the instrument off and then back on again.

PROB

ERR

A probe with SICRAM module has been inserted when not admissible
for that specific instrument.

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.

CAL

blinking

Calibration not completed correctly.

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.

HD2105 - 26 - V2.3

The following table reports the indications provided by the instrument as they appear on the display,
together with their description.

Display indications Explanation

>>>_LOG_DUMP_or_ERAS

transfer or erase data

>>>_PRBE_TYPE

type of probe connecte

d

AUTO-HOLD

automatic function holding the displayed measurement

BATT TOO LOW - CHNG NO

W

battery discharged - replace it immediatel

y

BAUDRATE >>

>

baud rate valu

e

BUFR_1

first buffer value

BUFR_2

second buffer value

BUFR_3

third buffer valu

e

CAL ERR

calibration error

COMM STO

P

p

rinting complete

COMM STRT

p

rinting starte

d

DAY

_

da

y

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 cleare

d

HOUR

hour

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 cleare

d

LOG_STO

P

logging complet

e

LOG_STRT

logging starte

d

MIN >>> USE_UNIT_TO_ZERO SEC

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

MNTH

month

NEW_PROB_DET

new probe detected

NIL

disable current buffer

OFFS

offset

OVER

maximum limit exceede

d

pH RES

p

H measurement resolution

PLS_EXIT >>> FUNC RES_FOR_FACT ONLY

p

lease exit using ESC >>> function reserved to factory calibra-

tion

PRBE_SER #### ###

#

serial number #### #### of the connected probe

PRNT AND LOG INTV

p

rinting and logging intervals

PRNT INTV >>

>

p

rinting interval

PROB COMM LOST

lost communication with probe

PROB ERR

error - unexpected probe

RCD MODE

record function operating mode (max, min, avg)

SET USER BUFR

user define buffer value

SLP_MODE_LOG

turning off during recording mode

SLPE%

gain %

SMPL ID REL=RSET SER=PRINT

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

SYS ERR

#

p

rogram error number

#

UNDR

minimum limit exceede

d

YEAR

year

HD2105 - 27 - V2.3

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…

In this case, batteries should be replaced as soon as possible.
If you continue to use it, the instrument can no longer ensure correct measurement. The memory
data are maintained.

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 in order to
turn the instrument back on.

In order to avoid data loss, the logging session is ended, if the HD2105.2 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 (4 1.5V alkaline batteries - type AA) screw the cover on clockwise.

After replacing the batteries, the date, time, baud rate, type of probe, printing interval, logging pa­rameters must be set again: in order to simplify the operation, on insertion of the new batteries
the instrument turns on automatically and requests these parameters in sequence. To go to the
next item press ENTER; to return to measurement mode, press MENU.

HD2105 - 28 - V2.3

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 condit ions:

• 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.

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

HD2105 - 29 - V2.3

SERIAL INTERFACE AND USB

The HD2105.1 and HD2105.2 instruments are fitted with an electrically isolated RS-232C serial in­terface; the HD2105.2 also has an USB 2.0 interface.
The following serial cables can be used:

• HD2110CSNM: serial connection cable with 8-pole MiniDin connector on one end and

9-pole Sub D connector on the other end;

• C.206: serial connection cable with 8-pole MiniDin connector on one end and USB type A

connector on the other end. With integrated RS232/USB converter;

• CP23: connection cable with Mini-USB type B connector on one end and USB type A con-

nector on the other end (only for HD2105.2).

The connection via the C.206 cable requires the previous installation of the cable USB drivers. In­stall the drivers before connecting the C.206 cable to the PC.
The connection via the CP23 cable does not require the installation of USB drivers: when connecting
the instrument to the PC, the Windows® operating system automatically recognizes the device as an
HID device (Human Interface Device) and uses the drivers already included in the operating system.

Cable

Instrument

port

PC

port

Installation of

USB drivers

HD2110CSNM RS232 (MiniDin) RS232 (9-pole SubD) No

C.206 RS232 (MiniDin) USB Yes

CP23 USB (Mini-USB) USB No

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 13). 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.
The serial commands work with a standard serial communication program (e.g. Hyperterminal) only
through the RS232 serial port of the instrument, using the cable HD2110CSNM or the cable C.206.

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 6.778

Captured measurements (24 characters) AT = automatic temperature
compensation, temperature, pH or mV.

G0 Model HD2105 -2 Instrument model

HD2105 - 30 - V2.3

Command Response Description

G1 M=pH / Thermometer 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=Sicram Pt100 Type of probe connected to input

G7 Probe SN=11119999 Probe serial number

G8 Probe cal.=2004/01/12 Probe calibration date
GB User ID=0000000000000000 User code (set with T2xxxxxxxxxxxxxxxx)

GC Print instrument's heading

K1

PRINTOUT IMMEDIATE
MODE

Immediate printing of data

K0 Stop printing data

K4 & Start logging data

K5 & Stop logging 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

LUBn

&

Sets the unit of measurement for the pH. n=0 > pH

n=1 > mV
RA & # Reading of LOG/PRINT interval set

RP & 600 Battery level (Resolut. 0.01V)

RUA U= °C Channel A unit of measurement

RUB U= pH Channel B unit of measurement

WA# &

Setting LOG/PRINT interval.

# is a hexadecimal number 0…D that represents the position of the in-

terval in th e 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.

HD2105 - 31 - V2.3

STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER

The HD2105.1 and HD2105.2 instruments can be connected to a personal computer via an RS232C
serial port or USB 2.0 port, and exchange data and information through the DeltaLog9 software
running in a Windows operating environment. Both models can send in real time input measured
values directly to a PC, through the PRINT function; the HD2105.2 can also store the values
measured by using the Logging function (LOG key) in its internal memory. If necessary, the data
stored in the memory can be transferred to a PC later.

THE LOGGING FUNCTION - ONLY FOR HD2105.2

The Logging function allows the recording up to 40000 data pair [T-pH] registered by the probe
connected to the inputs. Logging always includes two parameters. Each data pair is composed of:
[temperature in °C or °F], [pH or mV]. 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 data. The
logged parameters are selected using the “°C/°F” and “pH/mV-ESC” keys.

See the description of the menu items on page 10.

If the automatic turning off option between two recordings (MENU >> Sleep_Mode_LOG) is en-
abled, 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 - ONLY FOR HD2105.2

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 funct ion 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.

HD2105 - 32 - V2.3

THE PRINT FUNCTION

The PRINT function sends the measurements taken in real time by the instrument inputs directly to
a PC or a printer. Print data units of measurements are the same as those used on the display. Print­ing always includes two parameters. Each pairs data is composed of: temperature in °C or °F, pH or
mV. The printed parameters are selected using the “°C/°F”, and “pH/mV” 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 10). If the
print interval is equal to 0, 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.

The PRINT function works with a standard serial communication program (e.g. Hyperterminal) only
through the RS232 serial port of the instrument, using the cable HD2110CSNM or the cable C.206.

Connect the HD40.1 printer using cable HD2110CSNM.

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 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.

• 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.

Examples of print-outs obtained using the HD40.1 printer

HD2105 - 33 - V2.3

CONNECTION TO A PC

HD2105.1

Connection to the PC with the cable:

• HD2110CSNM: 8-pole MiniDin connector on one end and 9-pole Sub D connector on the

other end;

• C.206: 8-pole MiniDin connector on one end and USB type A connector on the other end.

With integrated RS232/USB converter (requires the installation of the USB drivers).

HD2105.2

Connection to the PC with the cable:

• CP23: Mini-USB type B connector on one end and USB type A connector on the other end;

• HD2110CSNM: 8-pole MiniDin connector on one end and 9-pole Sub D connector on the

other end;

• C.206: 8-pole MiniDin connector on one end and USB type A connector on the other end.

With integrated RS232/USB converter (requires the installation of the USB drivers).

The instruments are supplied with the DeltaLog9 software 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.

CONNECTION TO THE RS232C SERIAL PORT OF THE INSTRUMENT

1. The measurement instrument must be switched off.

2. Using the Delta Ohm HD2110CSNM or C.206 cable, connect the measurement instrument to the

first free RS232C (COM) or USB serial port of the PC.

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

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

4. Start the DeltaLog9 application and press CONNECT. Wait for the connection to occur and fol-

low 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 OF THE INSTRUMENT - ONLY FOR HD2105.2

The connection via the CP23 cable does not require the installation of USB drivers: when connecting
the instrument to the PC, the Windows® operating system automatically recognizes the device as an
HID device (Human Interface Device) and uses the drivers already included in the operating system.

To check if the connection has been successfully completed, double-click on "Device Manager"
from the Control Panel. The following items should appear:

"Human Interface Device" >> "HID-compliant device"

"Human Interface Device" >> "USB Human Interface Device"

When the USB cable is disconnected, the items disappear and reappear when it is connected again.

HD2105 - 34 - V2.3

NOTES ABOUT WORKING AND OPERATIVE SAFETY

Authorized use

The technical specifications as given in chapter "TECHNICAL CHARACTERISTICS" must be ob­served. Only the operation and running of the measuring instrument according to the instructions
given in this operating manual is authorized. Any other use is considered unauthorized.

General safety instructions

This measuring system is constructed and tested in compliance with the EN 61010-1:2010 safety
regulations for electronic measuring instruments. It left the factory in a safe and secure technical
condition.
The smooth functioning and operational safety of the measuring system can only be guaranteed if
the generally applicable safety measures and the specific safety instructions in this operating man­ual are followed during operation.
The smooth funct ioning and operational safety of the instrument can only be guaranteed under the
environmental and electrical operating conditions that are in specified in chapter "TECHNICAL
CHARACTERISTICS".

Do not use or store the product in places such as listed below:

• Rapid changes in ambient temperature which may cause condensation.

• Corrosive or inflammable gases.

• Direct vibration or shock to the instrument.

• Excessive induction noise, static electricity, magnetic fields or noise.

If the measuring system was transported from a cold environment to a warm environment, the for­mation of condensate can impair the functioning of the measuring system. In this event, wait until
the temperature of the measuring system reaches room temperature before putting the measuring
system back into operation.

Obligations of the purchaser

The purchaser of this measuring system must ensure that the following laws and guidelines are ob­served when using dangerous substances:

 EEC directives for protective labour legislation
 National protective labour legislation
 Safety regulations

HD2105 - 35 - V2.3

INSTRUMENT TECHNICAL CHARACTERISTICS

Instrument

Dimensions (Length x Width x Height) 185x90x40mm

Weight 470g (complete with batteries)

Materials ABS, rubber

Display 2x4½ digits plus symbols

Visible area: 52x42mm

Operating conditions

Operating temperature -5…50°C

Warehouse temperature -25…65°C

Working relative humidity 0…90%RH without condensation

Protection degree IP66

Power Supply

Batteries 4 1.5V type AA batteries

Autonomy 200 hours with 1800mAh alkaline batteries

Power absorbed with instrument off 20μA

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

Units of measurement pH, mV, °C, °F

Security of memorized data Unlimited, independent of battery charge

conditions

Time

Date and time Schedule in real time

Accuracy 1min/month max drift

Measured values storage - model HD2105.2

Type 2000 pages containing 17 samples each

Quantity 34000 pairs of measurements composed

of [pH or mV] and [°C o °F].

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

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

Serial 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

HD2105 - 36 - V2.3

USB interface - model HD2105.2

Type 1.1 - 2.0 electrically isolated

Connections

Input module for the temperature probes 8-pole male DIN45326 connector

pH/mV input Female BNC

RS232 serial interface 8-pole MiniDin connector

USB interface (only HD2105.2) Mini-USB type B connector

Mains adapter (cod. SWD10) 2-pole connector (positive at centre)

Measurement of pH by instrument

Measurement range -2.000…+19.999pH

Resolution 0.01 or 0.001pH selectable from menu

Accuracy ±0.001pH ±1digit

Input impedance >1012Ω
Calibration error @25°C |Offset| > 20mV

Slope > 63mV/pH or Slope < 50mV/pH

Sensitivity > 106.5% or Sensitivity < 85%

Automatic/manual temperature compensation -50…+150°C

Standard solutions automatically detected (@25°C)

1.679pH - 2.000pH - 4.000pH - 4.008pH -

4.010pH - 6.860pH - 6.865pH - 7.000pH -

7.413pH - 7.648pH - 9.180pH - 9.210pH -

10.010pH

Measurement of mV by instrument

Measurement range -1999.9…+1999.9mV

Resolution 0.1mV

Accuracy ±0.1mV ±1digit

Drift after 1 year 0.5mV/year

Measurement of temperature by instrument

Pt100 measurement range -200…+650°C

Pt1000 measurement range -200…+650°C

Ni1000 measurement range -50…+250°C

Resolution 0.1°C

Accuracy ±0.1°C ±1digit

Drift after 1 year 0.1°C/year

HD2105 - 37 - V2.3

TECHNICAL DATA OF PROBES

pH ELECTRODES

ORDER CODE

MEASURING RANGE

AND USE

DIMENSIONS

KP20

0…14pH / 0…80°C / 2bar

Glass body - GEL filled

1 ceramic diaphragm

Waste water, Drinking wa-

ter, Water emulsions, Gal-

vanic, Fruit-juices, Water

suspensions, Paints, Titra-

tion, Varnish.

KP30

0…14pH / 0…80°C / 2bar

Glass body - GEL filled

1 ceramic diaphragm

Cable L=1m with BNC

Waste water , Drinking wa-

ter, Water emulsions, Gal-

vanic, Paints, Varnish, Wa-

ter suspensions, Fruit-juices

Titration.

KP50

0…14pH / -5…100°C / 2bar

Glass body - GEL filled

1 Teflon ring diaphragm

Varnish, Cosmetics, Water

emulsions, Galvanic, Creams,

Deionised water, TRIS

buffer, Drinking water, Fruit-

juices , Solutions of low ionic

content, Mayonnaise, Pre-

served foods, Paints, Titra-

tion, Titration in water solu-

tions, Water suspensions,

Soap, Waste water, Viscous

samples.

KP61

2…14pH / 0…80°C / 2bar

Glass body

Liquid reference

3 ceramic diaphragms

Waste water, Mixtures,

Bread, Fruit-juices , Varnish,

Cosmetics, Creams, Deion­ised water, Drinking water,

Water emulsions, Galvanic,

Soap, Yoghurt, Milk, Titra­tion, Preserved foods, Titra­tion in water solutions, Wa-

ter suspensions, Mayon-

naise, Wine, Solutions of

low ionic content, Butter,

Proteic substances, Paints,

Viscous samples.

HD2105 - 38 - V2.3

ORDER CODE

MEASURING RANGE

AND USE

DIMENSIONS

KP62

0…14pH / 0…80°C / 2bar

Glass body– GEL filled

1 ceramic diaphragm

Paints, Varn ish, Drinkin g wa-

ter, Water emulsions, Fruit-

juices , Galvanic, Water sus-

pensions, Titration, Waste

water.

KP63

0…14pH / 0…80°C / 1bar

Glass body

Liquid reference KCl 3M

1 ceramic diaphragm

Cable L=1m with BNC

Paints, Varn ish, Drinkin g wa-

ter, Water emulsions, Fruit-

juices , Galvanic, Water sus-

pensions, Titration, Waste

water.

KP64

0…14pH / 0…80°C / 0.1bar

Glass body

Liquid reference KCl 3M

Teflon ring diaphragm

Paints, Varnish, Cosmetics,

Creams, Deionised water,

Drinking water, Water emul-

sions, Fruit-juices, Soap, So-

lutions of low ionic content,
Preserved foods, Water sus-

pensions, Titration, Titration

in water solutions, TRIS

buffer, Waste water, Viscous

samples, Wine.

KP70

2…14pH / 0…50°C / 0.1bar

Body epoxy – GEL filled

1 open hole

Mixtures, Bread, Paints,
Varnish, Cosmetics, Creams,
Drinking water, Water emul-

sions, Fruit-juices, Galvanic,

Soap, Mayonnaise, Pre-

served foods, Cheese, Milk,
Water suspensions, Viscous

samples, Waste water, But-

ter, Yoghurt.

KP80

2…14pH / 0…60°C / 1bar

Glass body– GEL filled

1 open hole

Mixtures, Bread, Butter,

Paints, Varnish, Cosmetics,

Water emulsions, Creams,

Drinking water, Galvanic,

Fruit-juices, Soap, Mayon­naise, Preserved foods, Wa­ter suspensions, Titration in

water solutions, Viscous
samples, Milk, Titration,

Waste water , Yoghurt.

HD2105 - 39 - V2.3

ORDER CODE

MEASURING RANGE

AND USE

DIMENSIONS

KP100

0…14pH / 0…80°C / 1bar
Glass body – Liquid refer-

ence KCl 3M

Teflon ring diaphragm.

pH combined electrode, flat

membrane, S7 connector

glass body, for skin, leather,

paper.

REDOX ELECTRODES

ORDER CODE

MEASURING RANGE

AND USE

DIMENSIONS

KP90

±2000mV

0…80°C

5bar

Glass body

Liquid reference KCl 3M

General use

KP91

±1000mV

0…60°C

1bar

Epoxy body – GEL filled

Cable L=1m

with BNC

General use

Not heavy duty

4-WIRE Pt100 AND 2-WIRE Pt1000 PROBES

Model Type Application range Accuracy

TP47.100.O

1/3 DIN – Thin Film

Pt100 4 wires -50…+250°C 1/3 DIN

TP47.1000.O

1/3 DIN – Thin Film

Pt1000 2 wires -50…+250°C 1/3 DIN

TP87.100.O

1/3 DIN – Thin Film

Pt100 4 wires -50…+200°C 1/3 DIN

TP87.1000.O

1/3 DIN – Thin Film

Pt1000 2 wires -50…+200°C 1/3 DIN

Common characteristics

Resolution 0.1°C
Temperature drift @ 20°C

Pt100 0.003%/°C

Pt1000 0.005%/°C

HD2105 - 40 - V2.3

TEMPERATURE PROBES Pt100 SENSOR USING SICRAM MODULE

Model Type Application range Accuracy

TP472I

Immersion -196°C…+500°C

±0.25°C (-196°C…+300°C)

±0.5°C (+300°C…+500°C)

TP472I.0

1/3 DIN – Thin Film

Immersion -50°C…+300°C ±0.25°C

TP473P.I

Penetration -50°C…+400°C

±0.25°C (-50°C…+300°C)

±0.5°C (+300°C…+400°C)

TP473P.0

1/3 DIN - Thin Film

Penetration -50°C…+300°C ±0.25°C

TP474C.0

1/3 DIN - Thin Film

Contact -50°C…+300°C ±0.3°C

TP475A.0

1/3 DIN - Thin Film

Air -50°C…+250°C ±0.3°C

TP472I.5

Immersion -50°C…+400°C

±0.3°C (-50°C…+300°C)

±0.6°C (+300°C…+400°C)

TP472I.10

Immersion -50°C…+400°C

±0.3°C (-50°C…+300°C)

±0.6°C (+300°C…+400°C)

TP49A.I

Class A

Immersion -70°C…+250°C ±0.25°C

TP49AC.I

Class A

Contact -70°C…+250°C ±0.25°C

TP49AP.I

Class A

Penetration -70°C…+250°C ±0.25°C

TP875.I

Globe-thermometer

Ø 150 mm

-30°C…+120°C ±0.25°C

TP876.I

Globe-thermometer

Ø 50 mm

-30°C…+120°C ±0.25°C

TP87.O

1/3 DIN - Thin Film

Immersion -50°C…+200°C ±0.25°C

TP878.O

1/3 DIN - Thin Film

Photovoltaic +4°C…+85°C ±0.25°C

TP878.1.O

1/3 DIN - Thin Film

Photovoltaic +4°C…+85°C ±0.25°C

TP879.O

1/3 DIN - Thin Film

Compost -20°C…+120°C ±0.25°C

Common characteristics

Resolution 0.1°C
Temperature drift @ 20°C 0.003%/°C

HD2105 - 41 - V2.3

ORDER CODES

HD2105.1 Kit including: instrument HD2105.1, 4 x 1.5V alkaline batteries, operating man-

ual, case and DeltaLog9 software.

HD2105.2 Kit including: instrument HD2105.2 datalogger, 4 x 1.5V alkaline batteries, op-

erating manual, case and DeltaLog9 software.

pH/mV electrodes, temperature probes, standard reference solutions and ca­bles have to be ordered separately.

HD2110CSNM Connection cable 8-pole MiniDin – Sub D 9-pole female for RS232C.

C.206 Connection cable 8-pole MiniDin – USB type A. With integrated RS232/USB

converter.

CP23 Connection cable Mini-USB type B – USB type A.

DeltaLog9 Software for transfer and management of the data on PC using Windows (from

98) operating systems.

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

HD40.1 The kit includes: 24-column portable thermal printer, serial interface, 57mm paper

width, four NiMH 1.2V rechargeable batteries, SWD10 power supply, instruction
manual, 5 thermal paper rolls.

BAT.40 Spare battery pack for HD40.1 printer with in-built temperature sensor.

RCT The kit includes 4 thermal paper rolls 57mm wide and 32mm in diameter.

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.

pH ELECTRODES

KP20 Combined pH electrode for common use, GEL filled with screw connector S7,

Epoxy body.

KP30 Combined pH electrode for common use, GEL filled, cable 1m with BNC, Epoxy

body

KP50 Combined pH electrode for common use, varnish, emulsions GEL filled, with

screw connector S7, glass body.

KP61 Combined pH electrode, 3 diaphragms for milk, cream, etc. liquid reference, with

screw connector S7, glass body.

KP62 Combined pH electrode, 1 diaphragm for pure water, Paint, varnish, GEL filled,

with screw connector S7, glass body.

KP63 Combined pH electrode for common use, varnish, cable 1 m with BNC, electro-

lyte KCl 3M, glass body.

KP64 Combined pH electrode for water, varnish, emulsions, etc., electrolyte KCl 3M,

with screw connector S7, glass body.

HD2105 - 42 - V2.3

KP70 Combined pH electrode micro, diam.6.5mm, GEL filled, bread, mixtures, cheese,

etc., with screw connector S7, glass body.

KP80 Combined pointed pH electrode, electrolyte, with screw connector S7, glass body.

KP100 Glass body – Liquid reference KCl 3M, Teflon ring diaphragm pH combined

electrode, flat membrane, S7 connector, glass body, for skin, leather, paper.

CP Extension cable 1.5m with BNC connector on one side and S7 on the other side,

for electrode without cable with S7 connector.

CP5 Extension cable 5m with BNC connector on one side and S7 on the other side, for

electrode with S7 connector.

CP10 Extension cable 10m with BNC connector on one side and S7 on the other side,

for electrode with S7 connector.

CP15 Extension cable 15m with BNC connector on one side and S7 on the other side,

for electrode with S7 connector.

CE S7 screw connector for pH electrode.

BNC Female BNC for electrode extension.

ORP ELECTRODES

KP90 REDOX PLATINUM electrode, with screw connector S7, electrolyte KCl 3M,

glass body.

KP91 REDOX PLATINUM electrode general use not heavy duty, GEL filled, cable 1m

with BNC, glass body.

pH STANDARD SOLUTIONS

HD8642 Standard solution 4.01pH - 200cc.

HD8672 Standard solution 6.86pH - 200cc.

HD8692 Standard solution 9.18pH - 200cc.

REDOX STANDARD SOLUTIONS

HDR220 Redox standard solution 220mV 0,5 l.

HDR468 Redox standard solution 468mV 0,5 l

ELECTROLYTE SOLUTIONS

KCL 3M 100ml ready for use solution for refilling of the electrodes KP63, KP64, and KP90.

CLEANING AND MAINTENANCE

HD62PT Diaphragm cleaning (tiourea in HCl) – 500ml.

HD62PP Protein cleaning (pepsin in HCl) – 500ml.

HD62RF Regeneration (fluorhydric acid) – 100ml.

HD62SC Solution for electrode preservation – 200ml.

HD2105 - 43 - V2.3

TEMPERATURE PROBES COMPLETE WITH SICRAM MODULE

TP472I Immersion probe, sensor Pt100. Stem Ø 3 mm, length 300 mm. Cable length 2

metres.

TP472I.0 Immersion probe, sensor Pt100. Stem Ø 3 mm, length 230 mm. Cable length 2

metres.

TP473P.I Penetration probe, sensor Pt100. Stem Ø 4mm, length 150 mm. Cable length 2

metres.

TP473P.0 Penetration probe, sensor Pt100. Stem Ø 4mm, length 150 mm. Cable length 2

metres.

TP474C.0 Contact probe, sensor Pt100. Stem Ø 4 mm, length 230 mm, contact surface Ø

5 mm. Cable length 2 metres.

TP475A.0 Air probe, sensor Pt100. Stem Ø 4 mm, length 230 mm. Cable length 2 metres.

TP472I.5 Immersion probe, sensor Pt100. Stem Ø 6 mm, length 500 mm. Cable length 2

metres.

TP472I.10 Immersion probe, sensor Pt100. Stem Ø 6 mm, length 1000 mm. Cable length 2

metres.

TP49A.I Immersion probe, sensor Pt100. Stem Ø 2.7 mm, length 150 mm. Cable length 2

metres. Aluminium handle.

TP49AC.I Contact probe, sensor Pt100. Stem Ø 4 mm, length 150 mm. Cable length 2

metres. Aluminium handle.

TP49AP.I Penetration probe, sensor Pt100. Stem Ø 2.7 mm, length 150 mm. Cable length 2

metres. Aluminium handle.

TP875.I Globe-thermometer Ø 150 mm with handle. Cable length 2 metres.

TP876.I Globe-thermometer Ø 50 mm with handle. Cable length 2 metres.

TP87.O Immersion probe, sensor Pt100. Stem Ø 3 mm, length 70 mm. Cable length 2

metres.

TP878.O Contact probe for solar panels. Cable length 2 metres.

TP878.1.O Contact probe for solar panels. Cable length 5 metres.

TP879.O Penetration probe for compost. Stem Ø 8 mm, length 1 metre. Cable length 2

metres.

TEMPERATURE PROBES WITHOUT SICRAM MODULE

TP47.100.O Immersion probe, sensor Pt100 direct 4 wires. Probe's stem Ø 3mm, length

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

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

connection cable with connector, length 2 metres.

TP87.100.O Immersion probe, sensor Pt100 direct 4 wires. Probe's stem Ø 3mm, length 70mm.

4-wire connection cable with connector, length 2 metres.

HD2105 - 44 - V2.3

TP87.1000.O Immersion probe, sensor Pt1000. Probe's stem Ø 3mm, length 70mm. 2-wire

connection cable with connector, length 2 metres.

TP47 Only connector for probe connection: Pt100 direct 4 wires, Pt1000 and Ni1000 2

wires.

DELTA OHM metrology laboratories LAT N° 124 are accredited by ACCREDIA for Tem­perature, Humidity, Pressure, Photometry / Radiometry, Acoustics and Air Velocity. They
can supply calibration certificates for the accredited quantities.

HD2105 - 45 - V2.3

NOTES

HD2105 - 46 - V2.3

NOTES

GUARANTEE



TERMS OF GUARANTEE

All DELTA OHM instruments are subject to accurate testing, and are guaranteed for 24 months from the
date of purchase. DELTA OHM will repair or replace free of charge the parts that, within the warranty
period, shall be deemed non efficient according to its own judgement. Complete replacement is excluded
and no damage claims are accepted. The DELTA OHM guarantee only covers instrument repair. The
guarantee is void in case of incidental breakage during transport, negligence, misuse, connection to a
different voltage than that required for the appliance by the operator. Finally, a product repaired or
tampered by unauthorized third parties is excluded from the guarantee. The instrument shall be returned
FREE OF SHIPMENT CHARGES to your dealer. The jurisdiction of Padua applies in any dispute.

The electrical and electronic equipment marked with this symbol cannot be disposed of in public
landfills. According to the Directive 2011/65/EU, the european users of electrical and electronic
equipment can return it to the dealer or manufacturer upon purchase of a new one. The illegal
disposal of electrical and electronic equipment is punished with an administrative fine.

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

Instrument Code:

 HD2105.1  HD2105.2

Serial Number

RENEWALS

Date Date

Inspector Inspector

Date Date

Inspector Inspector

Date Date

Inspector Inspector

GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico
Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY
Phone [phone] | Fax [phone]
www.deltaohm.com | [e-mail]

The quality level of our instruments is the result of the constant development of the product. This may
produce some differences between the information written in this manual and the instrument you have
purchased. We cannot completely exclude the possibility of errors in the manual, for which we apologize.

The data, images and descriptions included in this manual cannot be legally asserted. We reserve the
right to make changes and corrections with no prior notice.

GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico
Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY
Phone [phone] | Fax [phone]
www.deltaohm.com | [e-mail]

V2.3

28/08/2017