GHM Delta OHM HD2304.0 User manual

Operating manual
Manometer
-Thermometer
HD2304.0
www.deltaohm.com
English
Keep for future reference.

HD2304 - 2 - V1.8
INDEX
GENERAL CHARACTERISTICS ......................................................................... 3
DESCRIPTION OF THE FUNCTIONS................................................................. 6
THE PROGRAMMING MENU........................................................................... 10
PROBES AND MEASUREMENTS...................................................................... 11
PP471 MODULE FOR PRESSURE MEASUREMENT ..........................................................11
PT100 TEMPERATURE PROBES ..............................................................................12
TEMPERATURE MEASUREMENT............................................................................12
CONNECTING THE TP47 CONNECTOR...................................................................12
DIRECT CONNECTION OF 4-WIRE Pt100 SENSOR ....................................................14
INSTRUMENT SIGNALS AND FAULTS ............................................................ 15
WARNINGS .................................................................................................. 16
INSTRUMENT STORAGE................................................................................ 17
LOW BATTERY WARNING AND BATTERY REPLACEMENT ............................... 18
WARNING ABOUT BATTERY USE.............................................................................18
NOTESABOUT WORKING AND OPERATIVE SAFETY........................................ 19
TECHNICAL CHARACTERISTICS.................................................................... 20
TECHNICAL CHARACTERISTICS OF THE MANOMETER-THERMOMETER..................................20
TECHNICAL DATA OF PROBES AND MODULES IN LINE WITH THE INSTRUMENT........................21
PRESSURE MEASUREMENT BY PP471 MODULE ........................................................21
SONDE DI TEMPERATURA SENSORE Pt100 CON MODULO SICRAM..................................22
Pt100 4-WIRE PROBES...................................................................................22
ORDERING CODES........................................................................................ 23

HD2304 - 3 - V1.8
GENERAL CHARACTERISTICS
The HD2304.0 Manometer - Thermometer is a portable instrument that allows
measurement of absolute, relative and differential pressure, and temperature.
•The PP471 electronic module is used to measure the pressure. The module
works as an interface between the instrument and the TP704 and TP705 series
Delta Ohm probes.
•The temperature is detected using immersion, penetration, contact or air
Pt100 probes with SICRAM module, or direct 4 wire Pt100 probes.
The probes are fitted with the SICRAM automatic detection module, with the factory
calibration settings already being memorized inside.
The units of measurement for the measurable quantities are:
•Pa (Pascal)
•hPa (hectopascal)
•kPa (kilopascal)
•mbar (millibar)
•bar (bar)
•atm (atmosphere)
•mmHg (millimeter of mercury)
•mmH2O (millimeter of water)
•kgf/cm² (kilogram-force/square centimeter)
•PSI
•inchHg (inch of mercury)
•inchH2O (inch of water)
•°C/°F
Using the MAX, MIN and AVG function of this instrument respectively obtains the
maximum, minimum or average values.
Other available functions are:
•the relative measurement REL;
•the HOLD function;
•the automatic turning off which can also be disabled.
For further details, see chapter ‘Description of the functions’ at page 6.

HD2304 - 4 - V1.8
Manometer - Thermometer
HD2304.0

HD2304 - 5 - V1.8
HD2304.0
1. Input for probes, 8-pole DIN45326 connector.
2. Battery symbol: displays the battery charge level.
3. Function indicators.
4. Secondary display line.
5. DATA/ENTER key: during normal operation displays the maximum (MAX), the
minimum (MIN) and the average (AVG) of current measurements; in the menu,
confirms the current selection.
6. CLR/ESC key: during normal operation resets the maximum, the minimum and the
average of current measurements; in the menu, it resets the value set with the
arrows.
7. HOLD/key: freezes the measurement during normal operation; in the menu,
increases the current value.
8. UNIT/MENU key: it allows selection of the unit of measurement; when pressed
together with the DATA key, it allows to open the menu.
9. ZERO: performs the zero of the pressure probes.
10.REL/key: during normal operation 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.
11. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed
together with the HOLD key, disables the AutoPowerOff function.
12. MAX (maximum value), MIN (minimum value) and AVG (average value)
symbols.
13. Main display line.
14. Line for symbols and comments.

HD2304 - 6 - V1.8
DESCRIPTION OF THE FUNCTIONS
The keyboard of the HD2304.0 Manometer – Thermometer is composed of double-
function keys. The function on the key is the "main function", while the one above the
key is the "secondary function".
When the instrument is in standard measurement mode, the main function is active.
Once the Settings Menu has been opened, by pressing simultaneously the
DATA+UNIT keys, the secondary function is enabled.
The pressing of a key is accompanied by a short confirmation "beep": a longer "beep"
sounds if the wrong key is pressed. Each key specific function is described in detail
below.
This key has two functions:
•ON/OFF: to turn the instrument on press ON, to turn it off press OFF.
The turning on enables all display segments for a few seconds, starts an Auto-test
including the detection of the probe connected to the input, and sets the instrument
ready for normal measurement. The following is displayed:
MIN
cm
min s
2
3
mµ
m
k
>>>
•AUTO/OFF: the AutoPowerOff function can be disabled by simultaneously
pressing this key and the "HOLD" key when turning the instrument on.
During turning on, should no probes be connected, the "NO_PRBE_SER_NUM"
message is displayed in the line for symbols for a few seconds, while the "ERR"
message is shown in the central part of the display. When the probe is inserted into a
functioning instrument, the "NEW_PROB_DET" (New probe detected) message
appears, while the "ERR" message is shown in the central part of the display, and a
sequence of "beeps" is simultaneously issued. As the data are captured upon turning
the instrument on, it is necessary to turn it off and on again.
Caution! Replace the probes when the instrument is off.
ON/OFF and AUTO/OFF key

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The instrument has an AutoPowerOff function that automatically turns the instrument
off after about 8 minutes if no key is pressed during the intervening time.
Press simultaneously the ON/OFF key and the HOLD key to disable this function.
In this case, remember to turn the instrument off using the ON/OFF key: disabling of
the automatic turning off is shown by the blinking battery symbol.
The CLR key has two functions:
•CLEAR (CLR): allows to reset the maximum (MAX), minimum (MIN) and
average (AVG) value of the captured measurements;
•ESC: once the MENU has been opened with the DATA+UNIT keys, the CLR
key will allow to cancel the parameters set using the and arrows.
The DATA key is used for the following functions:
•DATA: during normal measurement, By pressing this key once the maximum
(MAX) value of the measurements captured by the probe connected to the
instrument is displayed, updating it with the acquisition of new samples. By
pressing this key again, the minimum (MIN) value is displayed and by pressing
this key a third time the average (AVG) value is displayed.
The acquisition frequency is once a second.
The MAX, MIN and AVG values remain in the memory until the instrument is on,
even after exiting the DATA calculation function. When the instrument is off, the
previously memorized data are cleared. Upon turning on, the instrument
automatically starts memorizing the MAX, MIN and AVG values.
To reset the previous values and start with a new measurement session, press
until the FUNC_CLRD message appears.
•ENTER: once the MENU has been opened with the DATA+UNIT keys, the
DATA key will perform the ENTER function and the MENU can be browsed and
the displayed parameter confirmed. During electrode calibration, it allows to
decrease the nominal buffer value.
The HOLD key is used for the following functions:
•HOLD: by pressing this key the current measurement is frozen and the "HOLD"
message will appear in the upper left-hand corner of the display. To return to
the current measurement, press the key again.
•: once the MENU has been opened with the DATA+MENU key, the key will
allow to increase the value of the selected parameter.
DATA/ENTER key
HOLD/key
Disabling of the automatic turning off
CLR/ESC key

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Pressed together with the ON/OFF key, during turn on, the AutoPowerOff function is
disabled (see the description of the ON/OFF key).
The UNIT key is used for the following functions:
•UNIT: by pressing this key the unit of measurement of the input probe is
selected: the unit of measurement will appear in the upper part of the display;
the measured value will be displayed in the central line. By repeatedly pressing
the UNIT key, the desired unit of measurement can be selected between the
following:
oPressure measurement unit:
Pa (Pascal)
hPa (hectoPascal)
kPa (kiloPascal)
mbar (millibar)
bar (bar)
atm (atmosphere)
mmHg (millimeter of mercury)
mmH2O (millimeter of water)
kgf/cm² (kilogram-force/square centimeter)
PSI
inchHg (inch of mercury)
inchH2O (inch of water)
oTemperature measurement unit:
°C (Celsius degrees)
°F (Fahrenheit degrees)
•MENU: the menu includes the Probe Type item. This item displays the type of
probe connected to the instrument's input(see chapter xx):
- the menu is opened by pressing simultaneously DATA+UNIT: the first item of
the instrument programming menu will appear;
- use the and arrows (respectively located above the HOLD and REL keys) to
modify the displayed value;
- press DATA/ENTER to confirm the modification and go onto the next item;
- press CLR/ESC to cancel the modification;
- to exit the menu, press the UNIT/MENU key again.
By pressing this key, the ZERO of the pressure probes is performed.
•In the differential pressure probes leave the two inputs open, so that they
detect the same pressure.
•In the relative pressure (compared to the atmosphere) probes, leave the input
open, so that it detects the atmospheric pressure.
•In the absolute pressure probes, apply the vacuum by using a suitable pressure
calibrator.
UNIT/MENU key
Tasto ZERO

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The REL key is used for the following functions:
•REL: it displays the difference between the current value and that measured on
pressing the key. The "REL" message is displayed on the left. To return to the
normal measurement, press the key again.
•: once the MENU has been opened with the UNIT+MENU key, the key will
allow to decrease the value of the selected parameter.
REL/key

HD2304 - 10 - V1.8
THE PROGRAMMING MENU
To access to the menu press simultaneously the following keys:
Menu:
Probe type: the "PRBE_TYPE" message is displayed 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:
•TP704 and TP705 pressure probes combined with the PP471 module: the type
of probe (i.e. if the PP471 module and the TP704-2BAI probe (2 bar absolute)
are connected) is shown in the central part of the display. In the main line "2"
is displayed, which indicates the sensor's bottom scale. The unit of
measurement "bAr" and the sensor characteristic "Abs" (absolute) are
displayed alternately in the secondary line;
•temperature probes "Pt100" complete with SICRAM module: the "Auto"
message is displayed in the central part of the display;
•direct 4 wire "Pt100" temperature probes: in this case, the "100Pt_4u"
message is displayed.
NOTE: Upon turning on the instrument automatically detects the probes fitted with
SICRAM module: the type of probe is configured by the instrument and cannot be
modified by the user.
If direct 4 wire "Pt100" probes that are not manufactured by "Delta OHM" are
connected to the instrument, the NO_PRBE_SER_NUM message is displayed .
-use the and arrows (respectively located above the HOLD and REL keys) to
modify the displayed value;
-press DATA/ENTER to confirm the modification and go onto the next item;
-press CLR/ESC to cancel the modification;
-to exitthe menu, press the UNIT/MENU key again.