Delta HD2114P.0, HD2114P.2, HD2134P.0, HD2134P.2 Operating Manual
Operating manual
Manometers for Pitot tubes /
thermometers
HD2114P.0 – HD2114P.2
HD2134P.0 – HD2134P.2
www.deltaohm.com
Companies / Brands of GHM
English
Keep for future reference.
HD2114P/HD2134P - 2 - V2.3
CONTENTS
INTRODUCTION ..................................................................................................................................................... 3
KEYBOARD AND MENU DESCRIPTION ............................................................................................................ 8
THE PROBES ..........................................................................................................................................................14
OPERATION ............................................................................................................................................................15
DIMENSION S OF PITOT TUBES..................................................................................................................................16
FLOW RATE MEASUREMENT ....................................................................................................................................16
TEMPERATURE MEASUREMENT ...............................................................................................................................18
WARNINGS AND OPERATING INSTRUCTIONS ..............................................................................................20
INSTRUMENT SIGNALS AND FAULTS ..............................................................................................................21
LOW BATTERY WARNING AND BATTERY REPLACEMENT .......................................................................23
INSTRUMENT STORAGE .....................................................................................................................................24
SERIAL INTERFACE AND USB ...........................................................................................................................25
STORING AND TRANSFERRING DATA TO A PERSONAL COMPUTER ......................................................27
THE LOGGING FUNCTION - ONLY FOR HD2114P.2 AND HD2134P.2 .........................................................................27
CLEARING THE MEMORY - ONLY FOR HD2114P.2 AND HD2134P.2 ..........................................................................27
THE PRINT FUNCTION - ONLY FOR HD2114P.2 AND HD2134P.2 .............................................................................28
CONNECTION TO A PC ........................................................................................................................................29
CONNECTION TO THE RS232C SERIAL PORT OF THE INSTRUMENT - ONLY FOR HD2114P.2 AND HD2134P.2 ..............29
CONNECTION TO THE USB 2.0 PORT OF THE INSTRUMENT - ONLY FOR HD2114P.2 AND HD2134P.2..........................29
NOTES ABOUT WORKING AND OPERATIVE SAFETY ..................................................................................30
INSTRUMENT TECHNICAL CHARACTERISTICS ...........................................................................................31
TYPE K THERMOCOUPLE PROBES ............................................................................................................................33
ORDER CODES ......................................................................................................................................................34
HD2114P/HD2134P - 3 - V2.3
INTRODUCTION
The HD2114P.0 and HD2114P.2, HD2134P.0 and HD2134P.2 are portable micromanometers
using Pitot or Darcy tubes and a large LCD display. They are used to perform measurements in the
fields of air conditioning, heating and ventilation.
They measure the differential pressure detected by a Pitot or Darcy tube connected to the instrument
inputs acquiring the wind speed and flow rate inside pipelines and vents. They also measure the
temperature using a type K thermocouple sensor.
The HD2114P.2 and HD2134P.2 instruments are dataloggers. They memorize up to 36,000
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 HD2114P.2 and HD2134P.2 instruments can transfer via the RS232C serial port the acquired
measurements to a PC or to a portable printer in real time.
The Max, Min and Avg function calculates the maximum, minimum or average values. Other
functions include: the relative measurement REL, the HOLD function, and the automatic turning off
which can also be disabled.
The instruments have IP66 protection degree.
If not otherwise specified, this manual's descriptions are intended to be applicable to all
models.
HD2114P/HD2134P - 4 - V2.3
HD2114P.0 - HD2134P.0
Micromanometer with Pitot tube - Thermometer
HD2114P/HD2134P - 5 - V2.3
HD2114P.0 - HD2134P.0
1. Input for thermocouple K, standard miniature connector.
2. Positive input (+) into the pressure sensor. Quick coupling Ø 5mm
3. Battery symbol: displays the battery charge level.
4. Function indicators.
5. Secondary display line.
6. HOLD/ key: freezes the measurement during normal operation; in the menu, increases the
current value.
7. 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.
8. 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.
9. MENU key: allows access to and exit from the menu.
10. °C/°F-ESC key: when the thermocouple probe is not connected, it allows manual modification
of the temperature. When double pressed, changes the unit of measurement for temperature
from degrees Celsius to Fahrenheit; in the menu, cancels the operation in progress without
making changes.
11. UNIT/DUCT CALC key: during normal operation selects the unit of measurement for the
main variable; when pressed together with the FUNC key, starts the duct flow rate calculation
procedure.
12. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed together with the
HOLD key, disables the automatic turn off.
13. Peak, MAX, MIN and AVG symbols.
14. Main display line.
15. Degree of multiplication -3, 3 or 6: the apex, if present, indicates that the displayed
measurement must be divided by 1000 (apex "-3"), multiplied by 1000 (apex "3") or by
1,000,000 (apex "6").
16. Line for symbols and comments.
17. Negative input (-) into the pressure sensor. Quick coupling Ø 5mm
HD2114P/HD2134P - 6 - V2.3
HD2114P.2 - HD2134P.2
Micromanometer with Pitot tube - Thermometer
HD2114P/HD2134P - 7 - V2.3
HD2114P.2 - HD2134P.2
1. Input for thermocouple K, standard miniature connector.
2. Positive input (+) into the pressure sensor. Quick coupling Ø 5mm
3. External auxiliary power supply connector input (positive at centre).
4. Battery symbol: displays the battery charge level.
5. Function indicators.
6. Secondary display line.
7. HOLD/ key: freezes the measurement during normal operation; in the menu, increases 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. °C/°F-ESC key: when the thermocouple probe is not connected, it allows manual modification
of the temperature. When double pressed, changes the unit of measurement for temperature
from degrees Celsius to Fahrenheit; in the menu, cancels the operation in progress without
making changes.
15. UNIT/DUCT CALC key: during normal operation selects the unit of measurement for the
main variable; when pressed together with the FUNC key, starts the duct flow rate calculation
procedure.
16. ON-OFF/AUTO-OFF key: turns the instrument on and off; when pressed together with the
HOLD key, disables the automatic turn off.
17. Peak, MAX, MIN and AVG symbols.
18. Main display line.
19. Degree of multiplication -3, 3 or 6: the apex, if present, indicates that the displayed
measurement must be divided by 1000 (apex "-3"), multiplied by 1000 (apex "3") or by
1,000,000 (apex "6").
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).
22. Negative input (-) into the pressure sensor. Quick coupling Ø 5mm
HD2114P/HD2134P - 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, displays the setting of the Pitot or Darcy tube constant (please see the
Cost_PIT_DARC parameter on page 11) and sets the instrument ready for normal measurement.
If no thermocouple probe is connected to the input, it is the manual temperature which is
displayed in the secondary line. This value is 25°C by default.
+
Automatic turning off
The instrument has an AutoPowerOff function that automatically turns the instrument off after about
8 minutes if no key is pressed during the intervening time. The AutoPowerOff function can be
disabled by holding the HOLD key pressed down when turning the instrument on: the battery
symbol will blink to remind the user that the instrument can only be turned off by pressing the
<ON/OFF> key.
The automatic turning off function for the HD2114P.2 and HD2134P.2 models is disabled
when external power is used. On the other hand, it cannot be disabled when the batteries are
discharged.
HD2114P/HD2134P - 9 - V2.3
FUNC/ENTER key
During normal measurement this enables the display and logging of the maximum (MAX),
minimum (MIN) and average (AVG) value of the measurements captured by the Pitot tube
connected to the instrument, updating them with the acquisition of new samples. The acquisition
frequency is once a second.
The calculation is performed on the pressure, wind speed or flow rate appearing on the display upon
pressure of the FUNC key: by changing the unit of measurement, the Max, Min and Avg values are
cleared.
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.
In the menu, the ENTER key confirms the current parameter and then goes to the next one. Pressed
together with the UNIT/DuctCalc key, enables the flow rate calculation (please see the UNIT key
description).
Attention: the data captured using the Record function cannot be transferred to the PC.
HOLD/ key
It increases the current parameter when used in the menu; when used in measurement mode, it
freezes the measurement in progress, and upon application of pressure on the key, the message
HOLD appears in the upper side of the display. To return to the current measurement, press the
key again.
Upon turning on the instrument, the AutoPowerOff function can be disabled by holding the HOLD
key down (please see the ON-OFF key description).
UNIT key
In measurement mode, it allows selection of the unit of measurement of the pressure, wind speed
and calculated flow rate (shown in the central line of the display). By repeatedly pressing the key,
the different units of measurement are displayed in sequence: Pa, mbar, mmH
2
O, PSI for the
differential pressure, m/s, km/h, ft/m, mph, knot for the wind speed and l/s, m3/h, cfm for the flow
rate.
This setting changes the information displayed and, for the HD2114P.2 and HD2134P.2 models the
immediate print of data (SERIAL key).
The data recorded using the LOG function (HD2114P.2 and HD2134P.2) keep the chosen unit
of measurement displayed during logging.
The unit of measurement associated with the data sent to the printer or PC through the serial
port using the SERIAL function (HD2114P.2 and HD2134P.2), must be selected before
starting the print function.
HD2114P/HD2134P - 10 - V2.3
°C/°F - ESC key
The measured temperature value is used to compensate the wind speed measurement. When the
temperature probe is connected, 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 in the
-200…+600°C range 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.
REL/ key
In measurement mode, it displays the difference between the current value and that measured on
pressing the key for both measurements - main and secondary. The REL message appears on the
display; press the key again to return to the current measurement. The REL function is not applied
to manual temperature: if the thermocouple probe is not present, on pressing REL the error
indication ERR appears.
When used in the menu, it decreases the current variable value.
MENU Key
The first menu item is accessed by initially pressing on the MENU key; press ENTER to go to the
following items. To modify the item displayed, use the arrow keys ( and ). The current value is
confirmed by pressing the ENTER key and the display moves on to the next parameter. If pressing
ESC the setting is cancelled.
To exit the menu, press the MENU key at any time.
The menu items are listed in this order:
1) Differential pressure resetting: the most sensitive pressure sensors are affected by an error
linked to their position. By rotating the instrument from the horizontal to the vertical
position there is a variation in the measurement of a few Pascals. This is the reason the reset
command was designed for the differential value: leave the inputs of each probe open so that
they detect the same pressure and place the instrument in the position that will be used to
perform the measurement. When entering the menu, the "PRES_REL_TO_ZERO
ENTR_TO_MENU" message appears: press REL to reset the difference or press ENTER to
access other menu items. To guarantee the accuracy of maximum results, do not modify the
instrument's position compared to that used during the resetting.
2) Pressure probe bottom scale: the pressure sensor bottom scale is presented.
3) SECT m2 - SECT inch2: this parameter defines a duct's section area for flow rate
calculation. It is expressed in m2 or inch2. To change the unit of measurement, press UNIT.
HD2114P/HD2134P - 11 - V2.3
Use the arrows and confirm with ENTER. Please see the paragraph dedicated to wind speed
measurement on page 14.
4) Pres Baro (barometric pressure): the wind speed detected by the Pitot tube is the result of
different factors. Among these is the atmospheric pressure resulting from the formula
reported on page 15. Using the arrows, enter the atmospheric pressure value present during
the measurement. If the current pressure is not known, leave the parameter at the default
value of 1013mbar.
5) Pres Stat (Static pressure): static pressure present in the measured duct. It is referred to the
atmospheric pressure and is expressed in mbar. If the duct is open, in contact with the
atmosphere, its value is set to zero (default value). If the duct is closed, the pressure
difference compared to the atmospheric pressure, expressed in mbar, must be entered. In
order to avoid the sensor breakage, do not use the Pitot tube if the static pressure
exceeds the overpressure limit reported in the technical characteristics.
6) Cost_PIT_DARC (constant of Pitot or Darcy tube): using the arrows, enter the tube
constant value. The value can be set from 0.80 to 1.20. If the constant is not known, enter
1.00 for Pitot tubes and 0.84 for Darcy tubes. The set value is displayed when the instrument
is turned on.
7) AVG TIME SECS: time interval according to which the moving average is calculated,
in seconds, during measurement of the flow. The value ranges from 1 (no average) to 99
seconds. Please see the paragraph dedicated to wind speed measurement on page 14.
8) Management of memorized data (only HD2114P.2 and HD2134P.2): the message
">>>_LOG_DUMP_or_ERAS" (Transfer data or erase) is scrolled in the comment line.
The center figure reports the number of free memory pages (FREE). All memory data are
permanently erased by pressing SERIAL/EraseLOG. By pressing LOG/DumpLOG, the data
transfer of the logged data on the serial port is started: the "BAUD-RATE" must have
previously been set to the maximum value (please see the menu items described below and
the paragraph "STORING AND TRANSFERRING DATA TO A PERSONAL
COMPUTER" on page 27).
9) Print and log interval (only HD2114P.2 and HD2134P.2): 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 second intervals even if the interval is set
to 0. With an interval from 1 to 3600s, continuous data transfer is started when the SERIAL
key is pressed. To end the recording (LOG) and continuous data transfer operations
(SERIAL with an interval greater than 0), press the same key again.
10) Sleep_Mode_LOG (Automatic turning off during recording) (only HD2114P.2 and
HD2134P.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.
Note: even if Sleep_Mode_LOG=YES is selected, the instrument does not turn off for less
than one minute intervals.
HD2114P/HD2134P - 12 - V2.3
11) YEAR (only HD2114P.2 and HD2134P.2): to set the current year. Use the arrows to
modify this parameter and confirm using ENTER.
12) MNTH (month) (only HD2114P.2 and HD2134P.2): to set the current month. Use the
arrows to modify this parameter and confirm using ENTER.
13) DAY (only HD2114P.2 and HD2134P.2): to set the current day. Use the arrows to modify
this parameter and confirm using ENTER.
14) HOUR (only HD2114P.2 and HD2134P.2): to set the current hour. Use the arrows to
modify this parameter and confirm using ENTER.
15) MIN (only HD2114P.2 and HD2134P.2): to set the current minutes. In order to correctly
synchronize the minute, it is possible to reset the seconds by pressing the UNIT key. Use the
arrows to set the current minute plus one, and as soon as that minute is reached press UNIT:
this synchronizes the time to the second. Press ENTER to go onto the next item.
16) BAUD_RATE (only HD2114P.2 and HD2134P.2): indicates the frequency used,
expressed in kHz, for the serial communication with the PC. Values from 1.2 (1200 baud) to
38.4 (38400baud). 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 27).
LOG/DumpLOG key - only HD2114P.2 and HD2134P.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.
The HD2114P.2 and HD2134P.2 can turn off during logging between one capture and the next: the
function is controlled by the Sleep_Mode_LOG parameter. When the logging interval is less than
one minute, the logging instrument remains on; with an interval of at least one minute, it turns off
between one capture and the next if the parameter Sleep_Mode_LOG=YES.
>>>
Dump LOG - only HD2114P.2 and HD2134P.2
Press the MENU key until the ">>>_LOG_DUMP_or_ERAS" item is displayed and then press on
the LOG key: the transfer of the data contained in the instrument internal memory via the serial port
is started.
Please see the paragraph dedicated to data transfer on page 27.
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