Delta OHM HD32.1 User manual

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Operating manual
Thermal Microclimate
HD32.1
www.deltaohm.com
English
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HD32.1 - 2 - V2.1
TABLE OF CONTENTS
1. GENERAL CHARACTERISTICS...................................................................................................................... 4
2. WORKING PRINCIPLE..................................................................................................................................... 8
2.1 THE OPERATING PROGRAM A: MICROCLIMATE ANALYSIS ......................................................................... 8
2.1.1 WBGT Index............................................................................................................................................ 8
2.1.2 Turbulence Intensity (Tu index)................................................................................................................ 9
2.1.3 WCI Index...............................................................................................................................................10
2.1.4 Average Radiation Temperature tr............................................................................................................11
2.2 THE OPERATING PROGRAM B: DISCOMFORT ANALYSIS .............................................................................13
2.2.1 Unsatisfied with the vertical difference of temperature .............................................................................13
2.2.2 Unsatisfied with the floor temperature......................................................................................................14
2.2.3 Unsatisfied with the radiant asymmetry....................................................................................................14
2.3 THE OPERATING PROGRAM C: PHYSICAL QUANTITIES ...............................................................................15
3. THE USER INTERFACE...................................................................................................................................16
3.1 THE DISPLAY ...................................................................................................................................................16
3.1.1 The Operating Program A, Microclimate Analysis, Display......................................................................16
3.1.2 The Operating Program B, Discomfort Analysis, Display.........................................................................17
3.1.3 The Operating Program C, Physical Quantities, Display ...........................................................................17
3.2 THE KEYBOARD ...............................................................................................................................................24
4. OPERATION ......................................................................................................................................................26
4.1 THE OPERATING PROGRAM A: MICROCLIMATE ANALYSIS..................................................................................26
4.1.1 DR Index – Draught Risk.........................................................................................................................27
4.1.2 WBGT Index...........................................................................................................................................28
4.1.3 WCI Index...............................................................................................................................................29
4.1.4 Radiation Temperature Tr. .......................................................................................................................29
4.1.5 The unit of measurement “Unit”...............................................................................................................29
4.1.6 The maximum, minimum and average values of the captured quantities....................................................29
4.1.7 Instrument Setup......................................................................................................................................30
4.1.8 Start of a new logging session..................................................................................................................30
4.2 THE OPERATING PROGRAM B: DISCOMFORT ANALYSIS.....................................................................................31
4.2.1 The unit of measurement “Unit”...............................................................................................................31
4.2.2 The maximum, minimum and average values of the captured quantities....................................................32
4.3 THE OPERATING PROGRAM C: PHYSICAL QUANTITIES.......................................................................................32
4.3.1 Setting the pipeline section ......................................................................................................................33
4.3.2 The maximum, minimum and average values of the captured quantities....................................................34
5. MAIN MENU ......................................................................................................................................................35
5.1 INFO MENU......................................................................................................................................................35
5.2 LOGGING MENU...............................................................................................................................................36
5.2.1 Log Interval.............................................................................................................................................36
5.2.2 Self Shut-off mode...................................................................................................................................37
5.2.3 Start/stop time – Automatic start ..............................................................................................................38
5.2.4 Cancel auto start ......................................................................................................................................39
5.2.5 Log File Manager ....................................................................................................................................40
5.3 SERIAL MENU (SERIAL COMMUNICATION)........................................................................................................42
5.3.1 Baud Rate................................................................................................................................................43
5.3.2 The Print Interval.....................................................................................................................................43
5.4 RESET..............................................................................................................................................................44
5.5 CONTRAST.......................................................................................................................................................44
5.6 FIRMWARE.......................................................................................................................................................45
5.7 TIME/DATE ......................................................................................................................................................45
5.8 CALIBRATE......................................................................................................................................................46
5.9 KEY LOCK........................................................................................................................................................46
5.10 PASSWORD ....................................................................................................................................................47

HD32.1 - 3 - V2.1
6. PROBES AND MEASUREMENTS....................................................................................................................49
6.1AAND BOPERATING PROGRAM PROBES : ........................................................................................................49
6.1.1 Warnings, care and maintenance of the probes .........................................................................................65
6.2 PROBES FOR THE OPERATING PROGRAM C: PHYSICAL QUANTITIES ....................................................................67
6.2.1 Temperature measurement using the probe Pt100 complete with SICRAM module...................................67
6.2.2 Technical information on temperature probes Pt100 using SICRAM module ............................................68
6.2.3 Measurement of relative humidity using the combined humidity/temperature probe ..................................69
6.2.4 Technical information on relative humidity and temperature probes using SICRAM module...........................70
6.2.5 Wind speed measurement ........................................................................................................................72
6.2.6 AP471S… Hot-wire wind speed measurement probes complete with SICRAM module.............................74
6.2.7 Technical information on Hot-wire wind speed measurement and temperature probes using SICRAM
module....................................................................................................................................................76
6.2.8 AP472S… Vane wind speed measurement probes complete with SICRAM module...................................79
6.2.9 Technical information on Vane wind speed measurement probes using SICRAM module..........................82
6.2.10 Light measurement ................................................................................................................................83
6.2.11 Technical characteristics of photometric and radiometric probes complete with SICRAM module to be
connected with the instruments on line.....................................................................................................84
6.2.12 HD320A2 probe for the measurement of CO Carbon monoxide..............................................................90
6.2.13 HD320B2 probe for the measurement of CO2 carbon dioxide concentration .............................................94
7. SERIAL INTERFACE AND USB.......................................................................................................................96
7.1 THE OPERATING PROGRAM A: MICROCLIMATE ANALYSIS..................................................................................96
7.2 THE OPERATING PROGRAM B: DISCOMFORT ANALYSIS.....................................................................................98
7.3 THE OPERATING PROGRAM C: PHYSICAL QUANTITIES.......................................................................................99
7.4 STORING AND TRANSFERRING DATA TO A PC .................................................................................................101
7.4.1 The Logging Function ...........................................................................................................................101
7.4.2 The Erase Function: clearing the memory...............................................................................................101
7.4.3 The Print Function.................................................................................................................................101
8. INSTRUMENT SIGNALS AND FAULTS .......................................................................................................102
9. BATTERY SYMBOL AND BATTERY REPLACEMENT – MAINS POWER SUPPLY..............................103
9.1 WARNING ABOUT BATTERY USE ......................................................................................................................104
10. INSTRUMENT STORAGE ............................................................................................................................104
11. MEASUREMENT REPORTS PRINTING ....................................................................................................105
12. TECHNICAL CHARACTERISTICS.............................................................................................................141
13. EXPLANATORY TABLES ON THE MICROCLIMATE PROBES USAGE ..............................................143
13.1 DIAGRAM OF THE PROBES FOR HD32.1 OPERATING PROGRAM A: MICROCLIMATE ANALYSIS .........................144
13.2 DIAGRAM OF THE PROBES FOR HD32.1 OPERATING PROGRAM B: DISCOMFORT ANALYSIS .............................147
14. ORDERING CODES.......................................................................................................................................148
14.1 AAND BOPERATING PROGRAMS PROBES ......................................................................................................149
14.2 PROBES FOR THE OPERATING PROGRAM C: PHYSICAL QUANTITIES ................................................................150
14.2.1 Temperature probes complete with SICRAM module...........................................................................150
14.2.2 Relative Humidity and Temperature combined probes complete with SICRAM module........................150
14.2.3 Wind Speed and Temperature combined probes complete with SICRAM module.................................151
14.2.4 Photometric/Radiometric probes for Light measurement complete with SICRAM module ....................151
14.2.5 Probes for CO2 carbon dioxide measurement complete with SICRAM module.....................................152
14.2.6 Probes for the measurement of CO carbon monoxide complete with SICRAM module .........................152

HD32.1 - 4 - V2.1
1. GENERAL CHARACTERISTICS
The HD32.1 Thermal Microclimate has been designed for microclimate analysis in the workplace;
the instrument is used to detect the necessary parameters to establish if a certain workspace is
suitable to perform certain activities.
The instrument can manage three operating programs that can be loaded by the user, according to
the measurements program and the quantities being detected.
The instrument has eight inputs for probes with SICRAM module: The probes are fitted with an
electronic circuit that communicates with the instrument. The calibration settings are memorized
inside.
All SICRAM probes, except the vane probe, can be plugged into any input: They will be
automatically detected when you turn the instrument on.
NOTE: The vane probe, complete with SICRAM module, for wind speed measurement can be
exclusively connected to input 8.
The instrument comes with a barometric pressure sensor. The barometric pressure is displayed only
by the Microclimate Analysis operating program.
The machine can be programmed to perform the logging (capture) of a measurement session. You
can specifically set a sampling interval per each session.
Furthermore, the auto-start function can be used to activate the setting of the measurements’ initial
date and time, and the automatic start and end of the data logging session.
NOTE: The set capture interval is valid for all the probes connected to the machine.
Other operating programs user selectable/settable common 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 and their
deletion.
•The data transfer speed via the serial RS232 port.
•The setting and enabling/disabling of the keyboard protection password.
The operating programs are:
•prog. A: HD32.1 Microclimate Analysis
•prog. B: HD32.1 Discomfort Analysis
•prog. C: HD32.1 Physical Quantities
The operating program A: Microclimate Analysis, HD32.1, can simultaneously detect the
following quantities:
•Globe thermometer temperature
•Natural ventilation wet bulb temperature
•Environment temperature
•Atmospheric pressure
•Relative humidity
•Wind speed

HD32.1 - 5 - V2.1
The operating program A: Microclimate Analysis displays also:
•The local turbulence intensity Tu, for DR (Draught Rating) calculation.
•The WBGT index (Wet Bulb Glob Temperature) with or without solar radiation.
•The WCI index (Wind Chill Index)
•The average radiation temperature tr.
The operating program B: Discomfort Analysis, HD32.1, can simultaneously detect the
following quantities:
•Air temperature detected at head height (1.7 m for a standing person; 1.1 m for a seated
person).
•Air temperature detected at abdomen height (1.1 m for a standing person; 0.6 m for a seated
person).
•Air temperature detected at ankle height (0.1 m).
•Temperature at floor level.
•Temperature of the net radiometer.
•Net radiation.
•Radiant asymmetry temperature.
The operating program B: Discomfort Analysis is used to calculate the local discomfort indexes
due to vertical temperature gradients or radiant asymmetry temperature.
The operating program C: Physical Quantities, HD32.1, can simultaneously detect the following
physical quantities:
•Temperature
•Relative humidity
•Illuminance, luminance, PAR, irradiance
•Wind speed
•carbon monoxide concentration CO.
•carbon dioxide concentration CO2
By using the operating program C: Physical Quantities, HD32.1 can simultaneously manage
up to six different probes complete with SICRAM module: one or two light probes and a probe for
each of the other physical quantities. If two or more probes of the same physical quantity are
connected (light probes excluded), the instrument recognizes only one probe. If, for example,
you insert two Pt100 temperature probes complete with SICRAM module to inputs 1 and 2, the
probe connected to input 1 is immediately recognized while the probe connected to input 2 is
ignored. The probe is detected during turn on, therefore if a probe is changed, it is necessary to
turn the machine off and on. During turn on the instrument performs a scan from input 1 to input 8.
The probes arrangement in relation to the inputs is arbitrary, except for the vane probes.
The vane probe, complete with SICRAM module, for wind speed measurement can be
exclusively connected to input 8.

HD32.1 - 6 - V2.1
Thermal Microclimate
HD32.1

HD32.1 - 7 - V2.1
HD32.1
1. ON/OFF key: Turns the instrument on and off.
2. TIME key: Allows the display of date and time, in the first line for about 8 seconds.
3. SHIFT FNC key: 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, confirms the data entered.
7. ESC key: Allows exiting from the menu or, in case of a submenu, exiting from the current level
display.
8. Navigation keys ▲▼◄►: Allows navigation through the menus.
9. PRINT key: Starts and ends the data transfer to the serial/USB communication port.
10. MEM key: Starts and ends the recording of the data.
11. SETUP key: Allows entering and exiting the instrument’s functioning parameter setting menu.
12. SICRAM inputs for the probes.
13. Battery cover.
14. RS232 serial port.
15. USB port.
16. Power supply input.

HD32.1 - 8 - V2.1
2. WORKING PRINCIPLE
2.1 THE OPERATING PROGRAM A: MICROCLIMATE ANALYSIS
By microclimate is meant those environmental parameters that influence the heat exchange between
the person and the surrounding spaces, and that determinate the so-called " thermal well-being".
The microenvironment climatic factors, together with the type of work performed, generate a series
of biological responses linked to thermal well-being (Comfort) or uneasiness (Discomfort).
The human organism, indeed, tends to maintain a thermal balance so that the body temperature is
optimum.
The HD32.1, Thermal Microclimate, through its operating program A: Microclimate Analysis
measures the following quantities:
•tnw:natural ventilation wet bulb temperature
•tg:globe thermometer temperature
•ta:environment temperature
•pr:atmospheric pressure
•RH:relative humidity
•va:wind speed
In addition to the direct measurements performed with the probes connected, the instrument can
directly calculate and display the following well-being data:
•WBGT index
•Tu index
•WCI index
•Average radiation temperature tr
2.1.1 WBGT Index
WBGT (Wet Bulb Globe Temperature) is one of the indexes used to determine the thermal stress of
a person in a hot environment. It represents the value, related to the metabolic output linked to a
specific work activity, that causes a thermal stress when exceeded. The WBGT index combines the
measurements of the natural ventilation wet bulb temperature tnw with the globe thermometer
temperature tgand, in some situations, with the air temperature ta. The calculation formula is the
following:
•Inside and outside buildings without solar radiation:
WBGenclosed spaces = 0.7 tnw + 0.3 tg
•Outside buildings with solar radiation:
WBGToutdoor spaces = 0.7 tnw + 0.2 tg + 0.1 ta
where:
tnw = natural ventilation wet bulb temperature;
tg= globe thermometer temperature;
ta= air temperature.
The measured data should be confronted with the limit values prescribed by regulations; when
exceeded you have to:

HD32.1 - 9 - V2.1
•Reduce directly the thermal stress on the workplace being examined;
•Proceed to a detailed analysis of the thermal stress.
In the following table are reported the thermal stress index WBGT limit values as provided for by
ISO 7243:
METABOLIC RATE, M WBGT LIMIT VALUE
METABOLIC
RATE CLASS
RELATIVE TO A
UNIT AREA OF
THE SKIN
W/m2
TOTAL (FOR A
SKIN SURFACE
AVERAGE AREA
OF 1.8 m2)
W
PERSON ACQUAINTED TO THE
HEAT
°C
PERSON NOT ACQUAINTED TO
THE HEAT
°C
0
(RESTING) M ≤65 M ≤117 33 32
1 65 < M ≤130 117 < M ≤234 30 29
2 130 < M ≤200 234 < M ≤360 28 26
3 200 < M ≤260 360 < M ≤468 DEAD AIR
25
NON DEAD AIR
26
DEAD AIR
22
NON DEAD AIR
23
4 M > 260 M > 468 23 25 18 20
NOTE – THESE VALUES HAVE BEEN DETERMINED BY USING A MAXIMUM REFERENCE RECTAL TEMPERATURE OF 38 °C
FOR THE PEOPLE BEING EXAMINED.
In order to calculate the WBGT index, the following probes should be connected:
•The natural ventilation wet bulb temperature probe.
•The globe thermometer probe.
•The dry bulb temperature probe, if the measurement is performed with solar
radiation.
In order to measure the WBGT index, you should refer to the following regulations:
•ISO 7726
•ISO 7243
2.1.2 Turbulence Intensity (Tu index)
Turbulence Intensity: Local turbulence intensity percentage, defined as the ratio between the local
wind speed standard deviation and the local air average speed (ISO 7726):
100×=
a
v
SD
Tu
where:
va
= average local wind speed
SD = local wind speed standard deviation
()
∑
=
−⋅
−
=n
i
aa vv
n
SD i
1
2
1
1
From the turbulence calculation, knowing the average values of the local wind speed and
environment temperature, you can get the DR (Draught Rating), according to ISO 7730:
(
)
(
)
(
)
14,337,005,034 62,0 +⋅⋅⋅−⋅−= TuvvtDR aaa

HD32.1 - 10 - V2.1
The discomfort from air current is defined as an undesired local cooling of the body due to air
motion. The DR indicates the percentage of unsatisfied people due to air current. The DR index is
calculated when the temperature goes from 20 °C to 26 °C and the average wind speed is < 0.5
m/s.
The DR index is calculated using the DeltaLog10 software.
2.1.3 WCI Index
WCI (Wind Chill Index) allows a synthetic evaluation of the effects of cold environments on man.
It shows the cooling index due to the wind. It allows evaluating the discomfort perceived during
exposure to low temperatures and wind. The index does not consider the clothing and the work
intensity. The WCI index is calculated by the instrument in presence of air under 10°C.
The WCI index calculation formula is:
WCI = 13.12 + 0.6215 ta– 11.37 va0.16 + 0.4275 ta va0.16
where:
ta: air temperature (in °C);
va: Wind speed (in km/h) calculated at 10 m from the ground.
As the instrument measures the wind speed at 1.5 m from the ground, the formula is corrected as
follows:
WCI = 13.12 + 0.6215 ta– 11.37(1.5 v1.5)0.16 + 0.4275 ta (1.5 v1.5)0.16
where v1.5 is the wind speed measured by the instrument at 1.5 m from the ground.
The following tables report some WCI values and the relevant frostbite risks (source: NOAA –
National Weather Service).
Air temperature °C
10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50
10 8.6 2.7 -3.3 -9.3 -15.3 -21.1 -27.2 -33.2 -39.2 -45.1 -51.1 -57.1 -63.0
15 7.9 1.7 -4.4 -10.6 -16.7 -22.9 -29.1 -35.2 -41.4 -47.6 -51.1 -59.9 -66.1
20 7.4 1.1 -5.2 -11.6 -17.9 -24.2 -30.5 -36.8 -43.1 -49.4 -55.7 -62.0 -68.3
25 6.9 0.5 -5.9 -12.3 -18.8 -25.2 -31.6 -38.0 -44.5 -50.9 -57.3 -63.7 -70.2
30 6.6 0.1 -6.5 -13.0 -19.5 -26.0 -32.6 -39.1 -45.6 -52.1 -58.7 -65.2 -71.7
35 6.3 -0.4 -7.0 -13.6 -20.2 -26.8 -33.4 -40.0 -46.6 -53.2 -59.8 -66.4 -73.1
40 6.0 -0.7 -7.4 -14.1 -20.8 -27.4 -34.1 -40.8 -47.5 -54.2 -60.3 -67.6 -74.2
45 5.7 -1.0 -7.8 -14.5 -21.3 -28.0 -34.8 -41.5 -48.3 -55.1 -61.8 -68.6 -75.3
50 5.5 -1.3 -8.1 -15.0 -21.8 -28.6 -35.4 -42.2 -49.0 -55.8 -62.7 -69.5 -76.3
55 5.3 -1.6 -8.5 -15.3 -22.2 -29.1 -36.0 -42.8 -49.7 -56.6 -63.4 -70.3 -77.2
Wind speed vaKm/h
60 5.1 -1.8 -8.8 -15.7 -22.6 -29.5 -36.5 -43.4 -50.3 -57.2 -64.2 -71.1 -78.0
The values that can cause frostbite within ≤30 minutes are reported in bold.

HD32.1 - 11 - V2.1
Wind Chill (°C) Frostbite risk
> -28 Low
-28 to -39 Medium: The exposed body parts can freeze within 10 to 30 minutes
-40 to -44 High: The exposed body parts can freeze within 5 to 10 minutes (*)
Alarm level
-44 to -47 High: The exposed body parts can freeze within 2 to 5 minutes (*)
-48 and colder High: The exposed body parts can freeze in less than 2 minutes (*)
(*): With vahigher than 50 km/h the frostbite process can be faster.
In order to calculate the WCI index, the following probes should be connected:
•The dry bulb temperature probe for air temperature measurement ta.
•The hot-wire probe for wind speed measurement.
In order to measure the WCI index, refer to the following:
•ISO 7726
•NOAA Specifications, National Weather Service.
2.1.4 Average Radiation Temperature tr
The average radiation temperature is defined as the temperature of a thermally uniform simulated
environment that would exchange with a man the same thermal radiation power exchanged in the
real environment.
In order to evaluate the average radiation temperature you have to measure: The globe
thermometer temperature, the air temperature and the wind speed measured near the globe
thermometer. The average radiation temperature calculation formula is the following:
•In case of natural convection:
() ()
273
1025.0
273
4/1
4/1
8
4−
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
−×
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛−
×
++= ag
ag
g
gr tt
D
tt
tt
ε
•In case of forced convection:
() () 273
101.1
273
4/1
4.0
6.08
4−
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡−
×
××
++= ag
g
a
gr tt
D
v
tt
ε
where:
D= globe thermometer diameter
εg= 0.95 assumed emissivity of the globe thermometer
tg= globe thermometer temperature
ta= air temperature.
va= wind speed
The average radiation temperature does not correspond to air temperature: If within a room very
high temperature surfaces are present (for example, a fireplace), these hot areas remarkably
influence the average radiation temperature.
The average radiation temperature is detected with the globe thermometer. A temperature probe
formed by a 150 mm copper ball, painted black matt, with emissivity equal to εg= 0.95 (according

HD32.1 - 12 - V2.1
to ISO 7726), and a Pt100 sensor inside. The globe thermometer temperature could be remarkably
higher than the air temperature. For example in a mountain cottage, in which air is at 0°C but the
presence of a fireplace produces an average radiation temperature of 40°C, ensuring a comfortable
condition. In normal conditions, maintaining a certain difference between average radiation
temperature and air temperature (where TMR is remarkably higher than TA) is preferable in order to
get a better environment quality. In houses, where fireplaces and ranges are absent, generally the
average radiation temperature is equal to the air temperature, or even lower. These conditions
(mainly in buildings with large window surfaces) are not particularly healthy as the warm humid air
facilitates the development of pathogenic organisms. From this point of view, using lamps or
radiating panels is more healthy. It is much more hygienic to use a higher average radiation
temperature than the air temperature, in order to guarantee comfort conditions. The regulations use
air temperature and not average radiation temperature to assess heating system, but this is wrong.
In order to calculate the average radiation temperature you have to connect the following
probes:
•Globe thermometer probe
•Air temperature measurement probe
•Hot-wire probe for wind speed measurement
In order to measure the average radiation temperature, you should refer to the following
regulations:
•ISO 7726

HD32.1 - 13 - V2.1
2.2 THE OPERATING PROGRAM B: DISCOMFORT ANALYSIS
The HD32.1, Thermal Microclimate, through its operating program B: Discomfort Analysis,
measures the following quantities.
•thhead temperature: air temperature detected at head height
•tb:body temperature: air temperature detected at abdomen height
•tk:ankle temperature: air temperature detected at ankle height
•tf:floor temperature: air temperature at floor level
•P:net radiation: net radiation, measured in Wm-2.
By knowing the temperatures at head th, abdomen tb, ankles tkand floor tfheight, you can
determine, according to ISO 7730, the following local thermal discomfort indexes:
•Unsatisfied with the vertical difference of temperature;
•Unsatisfied with the floor temperature;
•Unsatisfied with the radiant asymmetry.
2.2.1 Unsatisfied with the vertical difference of temperature
By detecting the temperatures at various heights you can check the presence of a air temperature
vertical gradient. This gradient could cause a local discomfort feeling. In the following figure you
can see the percentage value of the unsatisfied with the vertical difference of temperature PDv,
according to the temperature gradient between head (1.10 m) and ankles (0.10 m) for a seated
person. This index is calculated using the DeltaLog10 software.
In order to calculate the PDvindex (unsatisfied with the vertical difference of temperature)
you have to connect the following probes:
•Probe for the air temperature detected at head height
•Probe for the air temperature detected at ankle height
The PDvindex is calculated by the DeltaLog10 software.
In order to calculate the PDvindex (unsatisfied with the vertical difference of temperature)
you should refer to the following regulations:
•ISO 7730

HD32.1 - 14 - V2.1
2.2.2 Unsatisfied with the floor temperature
By measuring the floor temperature you can calculate the percentage index of the unsatisfied with
the floor temperature. The following diagram shows the PDfindex trend according to the floor
temperature.
In order to calculate the PDfindex (unsatisfied with the floor temperature) you have to
connect the following probe:
•Floor temperature probe
The PDfindex is calculated by the DeltaLog10 software.
In order to calculate the PDfindex (unsatisfied with the floor temperature) you should refer
to the following regulations:
•ISO 7730
2.2.3 Unsatisfied with the radiant asymmetry
The radiant temperature asymmetry Δtpr is the difference between the radiant temperatures
measured with the net radiometer. The index of the unsatisfied with the radiant asymmetry is
calculated according to a vertical (ceiling-floor) or horizontal (wall-wall) asymmetry. Form the
radiant temperature Δtpr measured by the instrument, you can determine the percentage of the
unsatisfied with the radiant asymmetry using the DeltaLog10 software. This is reported in the
following figure.
1Hot ceiling
2Cold wall
3Cold ceiling
4Hot wall

HD32.1 - 15 - V2.1
In order to calculate the percentage of the unsatisfied with the floor temperature you have to
connect the following probe:
•Net radiometer probe for radiant temperature measurement
The percentage of the unsatisfied with the radiant asymmetry is calculated using the
DeltaLog10 software.
In order to calculate the percentage of the unsatisfied with the radiant asymmetry, you should
refer to the following regulations:
•ISO 7730
2.3 THE OPERATING PROGRAM C: PHYSICAL QUANTITIES
The HD32.1, Thermal Microclimate, through its operating program C: Physical Quantities,
measures the following quantities:
•Temperature.
•Relative humidity and resulting measurements.
•Illuminance, luminance, PAR, irradiance.
•Wind speed and resulting measurements.
•carbon monoxide concentration CO.
•carbon dioxide concentration CO2

HD32.1 - 16 - V2.1
3. THE USER INTERFACE
The user interface consist of an LCD display and of the power, 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.
3.1 THE DISPLAY
The display changes according to the loaded operating program.
3.1.1 The Operating Program A, Microclimate Analysis, Display
The Thermal Microclimate HD32.1 main display, is divided in three areas:
The first area displays the battery’s charge status and the current time on the first line and the
measured quantities arranged on two columns:
Tnw: natural ventilation wet bulb temperature
Tg: globe thermometer temperature
Ta: environment temperature
Pr: atmospheric pressure
RH: relative humidity
Va: wind speed
The second area displays the resulting measurements, that is, the indoor or outdoor WBGT indexes
(WI or WO), the WCI and the average radiant temperature Tr ( see the previous chapter for further
details).
The third area displays the F1, F2 and F3 options. Please see the SHIFT FNC key in the following
paragraph.

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3.1.2 The Operating Program B, Discomfort Analysis, Display
The Thermal Microclimate HD32.1 main display, is divided in three areas:
The first area displays the battery’s charge status and the current time on the first line and the
measured quantities arranged on two columns:
Th: head temperature: air temperature detected at head height
Tb: body temperature: air temperature detected at abdomen height
Tn: net temperature: temperature of the net radiometer
Tk: ankle temperature: air temperature detected at ankle height
Tf: floor temperature: air temperature at floor level
P: net radiation: net radiation, measured in Wm-2
The second area displays the radiant asymmetry temperature DT. By knowing this parameter you
can obtain the percentage of the unsatisfied with the radiant asymmetry using DeltaLog10,
according to ISO 7730.
The third area displays the F1, F2 and F3 options. Please see the SHIFT FNC key in the following
paragraph.
3.1.3 The Operating Program C, Physical Quantities, Display
The Thermal Microclimate, HD32.1, display of the Operating Program C: Physical Quantities,
shows the quantities of the probes connected to the instrument inputs.
The display is divided into three areas:
The first area (first line) displays the battery’s charge status, the current date and time and the
type of probe:
Displayed message Displayed SICRAM probe
TEMPE Pt100 probe
RH-TEMPE RH-temperature combined probe
AIR-TEMP Vane probe or hot-wire probe and temperature probe
LUX Light probe
CO CO probe
CO2 CO2probe
The second area of the display shows the measurements detected by the probes. Each display is
associated to the relevant probe. In order to display the measurements, press F3 when the message
next appears on the last line.
The third area displays the F1, F2 and F3 options. Please see the SHIFT FNC key in the following
paragraph.

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If a Pt100 temperature probe with SICRAM module is present, the following is displayed:
The first display line shows “TEMPE.” indicating that the temperature of a Pt100 probe complete
with SICRAM module is displayed.
By repeatedly pressing F1 with unit on the last line, you can change the unit of measurement: The
available units are °C and °F; by pressing F1 again you can return to °C.
By pressing F3 with next on the last line, you go to the combined humidity/temperature probe
complete with SICRAM module:
The first display line shows “RH-TEMPE” indicating that the measurements of a combined
humidity/temperature probe complete with SICRAM module are displayed.
The second line displays the relative humidity. The third line displays the temperature.
In order to change the unit of measurement, press F2 with sel displayed on the last line.

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By pressing F1 when the second line is selected, you can change the relative humidity unit of
measurement:
The available units of measurement are:
•RH: % of relative humidity (%RH - Relative Humidity)
•SH: Grams of vapor in a kilogram of dry air (g/Kg - Specific Humidity, calculated)
•AH: Grams of vapor in a cubic meter of dry air (g/m3- Absolute Humidity, calculated)
•Pa: Partial vapor pressure (hPa, calculated)
•H: Enthalpy (J/g, calculated)
•Td: Dew point (°C or °F, calculated)
•Tw: Wet bulb temperature (°C or °F)
By pressing F1 when the third line is selected, you can change the temperature unit of
measurement: The available units are °C and °F; by pressing F1 again you can return to °C.

HD32.1 - 20 - V2.1
By pressing F3 with next on the last line, you go to the combined speed/temperature probe
complete with SICRAM module: The vane probes for wind speed measurement can be
exclusively connected to input 8. The display is as follows:
The first display line shows “AIR-TEMP” indicating that the measurements of a combined
speed/temperature probe complete with SICRAM module are displayed.
The second line displays the wind speed. The third line displays the flow rate measurement. In
order to get this measurement, you have to set the duct section (see next paragraph). The
fourth line displays the temperature, if required.
In order to change the unit of measurement, press F2 with sel displayed on the last line.
By pressing F1 when the second line is selected, you can change the wind speed unit of
measurement: