Delta OHM HD32.8.8 User manual

Our instruments’ quality level is the results of the product continuous development. This
can bring about differences between the information written in this manual and the
instrument that you have purchased. We cannot entirely exclude errors in the manual, for
which we apologize.
The data, figures and descriptions contained in this manual cannot be legally asserted. We
reserve the right to make changes and corrections without prior notice.
HD32.8.8 - HD32.8.16
Datalogger for thermocouples
ENGLISH
REV. 1.2
12/12/2016

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HD32.8.8 Datalogger for 8 Thermocouples
HD32.8.16 Datalogger for 16 Thermocouples

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HD32.8.8 and HD32.8.16
1. ON/OFF key: It turns the instrument on and off.
2. TIME key: It allows the display of date and time, in the first line for about 8 seconds.
3. SHIFT FNC key: It activates the Shortcut window.
4. Graphic display.
5. Function keys F1, F2, F3: Activate the function in the bottom line of the display.
6. ENTER key: In the menu, it confirms the data entered.
7. ESC key: It allows to exit from the menu or, in case of a submenu, to exit from the current
level display.
8. Navigation keys ▲▼◄►: Allow navigation through the menus. During measurement, you
can select the type of thermocouple using the ▲▼ arrows. Using the ◄► arrows, you can
display the inputs in groups of four (the probes from C1 to D4 are present in the HD32.8.16
model).
9. PRINT key: It starts and ends the data transfer to the serial/USB communication port.
10. MEM key: It starts and ends the recording of the data.
11. SETUP key: It allows to enter and exit the instrument’s functioning parameter setting menu.
12. Inputs for thermocouple probes, standard miniature connectors: 8 inputs for the HD32.8.8, 16
inputs for the HD32.8.16.
13. Battery compartment.
14. USB type B port.
15. Sub D 9-pole male connector for the RS232C serial port.
16. Power supply input 12Vdc/1A – external ∅5.5mm, internal ∅2.1mm. The power supply
positive (pole) must be connected to the central pin.

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TABLE OF CONTENTS
1. GENERAL CHARACTERISTICS....................................................................................................................... 6
2. KEYBOARD AND DISPLAY DESCRIPTION ................................................................................................... 7
2.1 The Display ..................................................................................................................................................... 8
2.2 The Keyboard .................................................................................................................................................. 8
3. OPERATION .......................................................................................................................................................11
3.1 The unit of measurement “Unit”......................................................................................................................11
3.2 The maximum, minimum and average values of the captured quantities...........................................................12
3.3 The relative value “rel”...................................................................................................................................12
3.4 Instrument Setup.............................................................................................................................................12
3.5 Start of a new logging session .........................................................................................................................12
4. MAIN MENU .......................................................................................................................................................14
4.1 Info Menu.......................................................................................................................................................14
4.2 Logging Menu ................................................................................................................................................15
4.2.1 Log Interval..............................................................................................................................................15
4.2.2 Self Shut-off mode...................................................................................................................................15
4.2.3 Start/stop time .........................................................................................................................................16
4.2.4 Cancel auto start ......................................................................................................................................19
4.2.5 Log File Manager .....................................................................................................................................19
4.3 Serial Menu (Serial Communication)...............................................................................................................22
4.3.1 The Baud Rate..........................................................................................................................................23
4.3.2 Print Interval ............................................................................................................................................23
4.4 Reset...............................................................................................................................................................24
4.5 Contrast ..........................................................................................................................................................24
4.6 Firmware ........................................................................................................................................................25
4.7 Time/date........................................................................................................................................................25
4.8 Calibrate.........................................................................................................................................................26
4.9 Key lock .........................................................................................................................................................26
4.10 Password.......................................................................................................................................................27
5. PROBES AND MEASUREMENTS.....................................................................................................................29
5.1 Temperature Measurement...............................................................................................................................29
5.2 Warnings, care and maintenance of the probes.................................................................................................30
6. INSTRUMENT SIGNALS AND FAULTS..........................................................................................................31
7. BATTERY SYMBOL AND BATTERY REPLACEMENT, MAINS POWER SUPPLY ..................................32
7.1 Warnings about battery use ..............................................................................................................................33
8. INSTRUMENT STORAGE .................................................................................................................................33
9. SERIAL INTERFACE AND USB .......................................................................................................................34
10. STORING AND TRANSFERRING DATA TO A PC......................................................................................36
10.1 The Logging Function...................................................................................................................................36
10.1.1 Storage capacity .....................................................................................................................................36
10.1.2 The Erase function: clearing the memory................................................................................................38
10.2 The Print function..........................................................................................................................................38
11. CONNECTION TO A PC ..................................................................................................................................39

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11.1 Connection to the RS232C serial port ............................................................................................................39
11.2 Connection to the USB 2.0 port .....................................................................................................................39
12. FUNCTIONING NOTES AND OPERATING SAFETY ..................................................................................40
13. TECHNICAL CHARACTERISTICS................................................................................................................41
14. ORDERING CODES..........................................................................................................................................44

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1. GENERAL CHARACTERISTICS
The HD32.8.8 and HD32.8.16 are two dataloggers for thermocouples that can capture, log and
then send to a PC or serial printer the data coming from the 8 or 16 thermocouples. The instruments
can work with thermocouple of type K, J, T, N, R, S, B or E. During the measuring phase, the
connected probes must be of the same type.
The probes position is detected during turn on: The probes are displayed in sequence according to
the same order of connection: First, the group A ones, then group B, etc.
The communication with the PC occurs through a multi-standard serial port RS232 or an automatic
detection USB 2.0. The memorization and printing interval, the logging start and end date, and the
communication parameters can be configured using the menu.
The captured data can be displayed on the PC using the DeltaLog9 software (vers. 3.0 and later).
Through the RS232 serial port, you can transfer the data in real time to an 80 column serial printer.
NOTE: The set capture and print intervals are valid for all the probes.
Other user selectable/settable parameters are:
•The units of measurement for the displayed temperature quantities: °C, °F, °K.
•The system date and time
•The display of the maximum, minimum, and average statistic parameters.
•The relative value REL.
•The data transfer speed via the serial RS232 port.
•The setting, enabling and disabling of the password that locks the keyboard.
The instrument can store up to 64 LOG sessions (data capture) in two modes:
•Automatic: Setting the automatic start and stop dates;
•Manual: Pressing MEM to start and end the data capture session.
The flash memory has a total capacity of 800,000 recordings divided amongst all existing inputs.
The memory space can be handled in two modes:
•When the available memory is full, the collected data are overwritten starting from the
oldest ones (circular memory),
•The recording is stopped when the available memory is full.

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2. KEYBOARD AND DISPLAY DESCRIPTION
The user interface consist of a backlit LCD display and the power-on, function, and setting keys.
Turn the instrument on and off with the ON/OFF key. When you turn the instrument on, the logo
and model will be displayed for a few seconds, and then the main display.
In this phase, the instrument detects the inputs where the probes are connected and the unused
inputs.
The probes are displayed in groups of four, according to the order of the connectors from left to
right: From input A1 to input B4 in the HD32.8.8 model, and from input A1 to input D4 in the
HD32.8.16 model. The unused inputs are not shown in the list.
If you have more than four probes connected at the same time, use the ◄► arrows to move from
one group to the other.
If a probe is disconnected when the instrument is on, the measurement indication is replaced by
some dashes “-----”, as in the following example.
Connect the probes again to restore the normal view.

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2.1 THE DISPLAY
The HD32.8 standard display is divided in two areas:
The first area displays, from top to bottom, the battery’s charge status and the current time, the
type of selected thermocouple, and the temperatures measured by the probes connected to the
inputs.
The bottom line displays the options that can be activated using the F1, F2 and F3 keys. Please see
the SHIFT FNC key in the following paragraph.
In the example, the function keys are associated to the temperature measurement units:
°C: Celsius degrees
°F: Fahrenheit degrees
°K: Kelvin degrees
2.2 THE KEYBOARD
The keys on the instrument perform the following functions:
ON/OFF key
It turns the instrument on and off.
When turning on the instrument using this key, the first screen will be displayed. After few seconds
the temperatures measured by the connected probes will be displayed.
NOTE: The display shows only the inputs to which the probes are connected. The probes are
detected during turn on: If a probe is later disconnected, the display will show some dashes near that
input.
TIME key
It allows the display of year/month/day and hour/minutes/seconds, in the first line for about 8
seconds. Normally the display shows, on the left, the icon for the battery’s charge status, on
the right, the hour/minutes/seconds. The battery symbol becomes [~] when the external power
supply is connected.

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SHIFT FUNCTION key
It activates the Shortcut window.
A drop-down menu opens as in the figure: The black background item is the active item. To select
another item, use the ▲▼ arrows and confirm with ENTER.
F1, F2, F3 keys
These are “function keys”: They activate the function in the lower line of the display (indicated by
the arrow in the figure); the function, enabled by SHIFT FNC, is selected and displayed in
“reverse” (e.g. in the figure the “°C” function is enabled).
SETUP key
It allows to enter and exit the instrument’s functioning parameter setting menu.
ENTER key
In the menu, it confirms the entered data.
ESC key
It allows to exit from the menu or, in case of a submenu, to move up one level.

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MEM key
It allows to start and end a “logging” session (data recording); the data logging interval must be set
in the menu.
PRINT key
It allows direct printing of the data via the serial port; the data printing interval must be set in the
menu.
Arrow keys
Allow navigation through the menus, selection of the type of thermocouple, and choice of the inputs
to be displayed. During measurement, you can select the type of thermocouple using the ▲▼
arrows. The connected thermocouples screens are display with the ◄► arrows.

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3. OPERATION
Connect the probes to the inputs located in the lower part of the instrument, and turn the HD32.8
datalogger on with the key. Using the ▲▼ arrows, select the type of thermocouple used (Tc
type).
On the display you will see the values measured by the first four connected probes. To view the
other probes, use the ◄► arrows.
If a probe is disconnected when the instrument is on, the value on the display is replaced by a series
of dashes: Reconnect the probe to view the new data.
The battery charge symbol and current time are up on the left (for further details, see page 32).
Then the temperatures detected by each input are displayed, starting from the inputs A, then the
inputs B, and so on. The available inputs are arranged in groups of four probes each, A, B, C and D:
A1 is the first input of group A, A2 the second input, and so on, until input B4 for the HD32.8.8 and
input D4 for the HD32.8.16.
Use the F1, F2 and F3 keys to select the unit of measurement (°C, °F or °K).
3.1 THE UNIT OF MEASUREMENT “UNIT”
By using the “Functions” menu, enabled by the SHIFT FNC key, select the unit of measurement
for the temperature in °C (Celsius), °F (Fahrenheit) or °K (Kelvin) degrees, as follows:
1. Press SHIFT FNC to open the drop-down menu;
2. Use the arrows ▲▼ to select unit;
3. Press ENTER to confirm: The selected quantity is displayed in the central line of the display;
4. The three different temperature units of measurement are shown in the bottom line of the
display. Using the F1, F2 or F3 function keys, the unit is selected and displayed near the
measured value;
5. Press ESC to exit the drop-down menu without making any change.

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3.2 THE MAXIMUM,MINIMUM AND AVERAGE VALUES OF THE CAPTURED QUANTITIES
In order to display the maximum, minimum and average values of the measured quantities, proceed
as follows:
1. Use SHIFT FNC to open the drop-down menu;
2. Use the arrows ▲▼ to select “data”;
3. Confirm by pressing ENTER: The selected quantity is displayed in the central line of the
display;
4. The three items max (maximum), min (minimum) and avg (average) are shown in the bottom
line of the display using F1 or F2.
NOTE: Once selected, for example max, all displayed quantities represent the maximum value.
The average is calculated on the first five minutes of samples, and then on the current
average.
The F3 key allows choosing to clear (Clr) the maximum, minimum and average data of the
captured measurements:
1. Select Clr using F3 to clear the max, min and avg calculations;
2. Another drop-down menu will open;
3. Use the arrows ▲▼ to select yes;
4. Press ENTER to confirm.
5. Press ESC or select no, to exit without clearing the data.
3.3 THE RELATIVE VALUE “REL”.
In the “Functions” menu, you can also display the relative value of the measured temperatures.
This function clears the current temperature measurement and displays, for all inputs, the
difference between the current value and that measured when the function was activated.
1. Use SHIFT FNC to open the drop-down menu;
2. Use the arrows ▲▼ to select “rel”;
3. Press ENTER to confirm: the rel message is displayed in the lower line of the display;
4. To enable the function, press F1;
5. The temperatures will be cleared and the rel message will be displayed near their value;
6. After few instants the (negative or positive) departure values will be displayed;
7. Press F1 again to disable the rel function
8. Press ESC to exit the drop-down menu without making any change.
3.4 INSTRUMENT SETUP
In order to set the instrument, open the main menu by pressing SETUP. See the next chapter for
further details.
3.5 START OF A NEW LOGGING SESSION
Press MEM to start and end a logging session: This key 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 “Log
interval” menu parameter. The data logged between a start and subsequent stop represent a
measurement block.

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During logging, the LOG indication is displayed, the battery symbol blinks and a beep is issued
each time a logging occurs.
To end the logging, press MEM again.
The instrument can turn off during logging between one capture and the next: The function is
controlled by the Self_shut_off_Mode menu 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 Self_shut_off_Mode parameter is enabled.
For the details see par. “4.2 MENU LOGGING”.

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4. MAIN MENU
To access the programming menu press SETUP. The setting menu will be displayed with the
following items:
0) Info
1) Logging
2) Serial
3) Reset
4) Contr.
5) Firmware
6) Time/date
7) Calibrate
8) Key lock
9) Password
If you do not press any key within 2 minutes, the instrument goes back to the main display.
Use the arrows ▲▼ ◄► and press ENTER to select an item.
To exit the selected item and return to the previous menu, press ESC.
To exit the menu and return directly to measurement, press SETUP.
4.1 INFO MENU
To access the Info menu, open the main menu using the SETUP key. Using the ▲▼ ◄► arrows,
select Info and confirm with ENTER.
The following information on the instrument will be displayed: Instrument code, firmware date and
version, serial number, instrument calibration date, user identification code.
This screen cannot be modified: The user identification code (User ID) can be set using the
DeltaLog9 software (vers. 3.0 and later).
Press ESC to return to the main menu. Press SETUP to exit the menu.

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4.2 LOGGING MENU
To access the Logging menu, open the main menu using the SETUP key. Using the ▲▼ ◄►
arrows, select Logging and confirm with ENTER.
The parameter setting submenu for the logging sessions will be displayed.
You can set the data capture frequency (Log interval) and the automatic logging start (Start/stop
time). Th pt e ca rntrvl th mforllprob u e i e a is e sa e a es.
With the “Log File Manager” you can handle the stored data sessions: printing, erasure.
4.2.1 Log Interval
Use this item to set the LOG interval (interval between two subsequent sample records): To enter
this setting, proceed as follows.
Once you have accessed the LOGGING submenu (previous par.) use the arrows ▲▼to select Log
Interval:
1. Use the arrows ▲▼to select the interval duration from a minimum of 2 seconds to a
maximum of one hour;
2. Press ENTER to confirm and return to the Logging menu;
3. Press ESC to return to the Logging menu without making any change;
4. Press ESC again to return to the main menu;
5. Press SETUP to exit immediately from the menu.
These are the available values:
2, 5, 10, 15, 30 seconds, 1, 2, 5, 10, 15, 20, 30 minutes, and 1 hour.
4.2.2 Self Shut-off mode
The Self shut-off mode item controls the instrument’s automatic turning off during logging,
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 15 seconds before the sampling and will
turn off immediately afterwards, thus increasing the battery life.

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Once you have accessed the LOGGING submenu (previous par.) use the arrows ▲▼to select Self
shut-off mode:
•If the set Log Interval (see previous par.) is lower than 60 seconds, the following will be
displayed
•If the set Log Interval (see previous par.) is greater or equal to 60 seconds, the following
screen will be displayed
1. By using the arrows ▲▼you can select:
STAY ON (the instrument stays on)
SHUT OFF (the instrument shuts off between one logging and the next)
2. Press ESC to return to the Logging menu;
3. Press ESC again to return to the main menu;
4. Press SETUP to exit immediately from the menu.
4.2.3 Start/stop time
The logging start and end date and time can be programmed. When called, the function suggests
the current time plus 5 minutes as the start time: Press <ENTER> to confirm or set the date and
time using the ▲▼ arrows. Then you are asked to set the data to end the recording: By default
(factory setting) the instrument suggests the start time plus 10 minutes. The default suggested
values are such to allow the user to setup an instrument ready for acquisition.
To enter this setting, proceed as follows.
Once you have accessed the LOGGING submenu use the arrows ▲▼to select Start/Stop time:
The following message “Enter start time” will be displayed:

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1. Press ENTER to confirm the data prompted by the instrument;
2. To change the prompted data, use the arrows ◄►to select the data to be changed
(year/month/day and hour:minutes:seconds);
3. The selected data will flash;
4. Use the arrows ▼▲ to change its value;
5. Confirm by pressing ENTER;
6. Press ESC to return to the Logging menu without making any change;
7. Press ESC again to return to the main menu;
8. Press SETUP to exit immediately from the menu.
After setting the logging start time, the logging end time (enter stop time) window will be
displayed:
1. Press ENTER to confirm the data prompted by the instrument;
2. To change the prompted data, use the arrows ◄►to select the data to be changed
(year/month/day and hour:minutes:seconds);
3. The selected data will flash;
4. Use the arrows ▼▲ to change its value;
5. Confirm by pressing ENTER;
6. Press ESC to return to the Logging menu without making any change;
7. Press ESC again to return to the main menu;
8. Press SETUP to exit immediately from the menu.
NOTE: The logging end time prompted by the instrument is 10 minutes after the logging
session start time.
9. Once both values have been set, a summary will be displayed showing the start and end time of
the LOG session.

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10. Press ENTER to confirm or ESC to exit without enabling the automatic start: In both cases,
you will return to the LOGGING menu.
11. Press SETUP to exit immediately from the main menu.
When the instrument starts automatically a LOG session, a beep is issued on each capture and the
blinking LOG message is shown at the top of the display.
Press MEM to stop the session before the set time.
To cancel the automatic start setting, use the Cancel auto start function as illustrated in the
following paragraph.
NOTE 1: The automatic logging session is started even when the instrument is off. If it is off
when the automatic logging session is started, the instrument is turned on few seconds before the
start time and, if powered by the mains, it remains on at the end of logging. If it is powered by the
battery, it is turned off when idle for some minutes at the end of the logging session.
NOTE 2: Use of the MEM key after setting the automatic start and stop.
•If the automatic start and stop have been set and, before the automatic start, you press the MEM
key, the instrument starts recording at once. The next automatic start command is ignored, the
recording ends at the automatic stop command.
•If the automatic start and stop have been set and, after the automatic start, you press the MEM
key, the instrument stops recording. The next preset automatic stop command is cleared.
Automatic Start Automatic StopMEM key
Lo
gg
in
g
Interval
I
g
nore
d
Automatic Start Automatic StopMEM key
Logging Interval

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4.2.4 Cancel auto start
Once the LOG session start and end times are set, you can inhibit the session automatic start by
using Cancel auto start.
Once you have accessed the LOGGING submenu:
1. Use the arrows ▲▼to select Cancel auto start;
2. The LOG session start and end times will be displayed:
3. By pressing ▲the following message will be displayed: “Self timer not active”;
4. Press ENTER to confirm the automatic start cancellation;
5. Press ESC to exit without cancelling the automatic start;
6. Press ESC again to exit from the submenus;
7. Or press SETUP to exit immediately from the main menu.
See the previous paragraph to set a new automatic start time after cancelling the previous one.
4.2.5 Log File Manager
This item allows managing the captured logging sessions: The instrument allows printing the files
of the captured sessions (Print selected log), cancelling the entire memory (Erase ALL logs) and
selecting the memory management mode (Select memory Type).
The instrument can store up to 64 LOG sessions, progressively numbered from 00 to 63: The
session list is arranged on 4 lines and 4 columns. If you have over 16 sessions, using the F1 function
key (Page-) you shift to the previous screen, and with the F3 key (Page+) to the next one. The
current page (0, 1, 2 or 3) and the total data pages are displayed in the upper right corner: In the
example, “0/3” means page 0 of three pages of logged data.

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Once you have accessed the LOGGING submenu:
1. Use the arrows ▲▼to select Log File manager: You will see the following submenu
0) Print selected log
1) Erase ALL logs
2) Select memory type
2. Use the arrows ▲▼ to select a menu item;
3. Press ENTER to confirm;
4. Press ESC to return to the menu;
5. Press SETUP to exit immediately from the main menu.
NOTE: You can connect a PC or serial port printer to the instrument RS232C serial port. A parallel
port printer requires a serial/parallel converter between the instrument and the printer (non
supplied).
Before starting the printing via the RS232C port, you have to set the baud rate.
To do so, select the Baud Rate in the menu Serial (see par. 4.3.1 The Baud Rate) and select the
maximum value equal to 38400 baud. To connect a printer, use the maximum allowed value for the
printer.
The communication between instrument and PC or between instrument and printer, only
works if the instrument and connected device (PC or printer) baud rates are the same.