Katalog Produk

Keterangan

Area heat stress monitor data logger alat untuk mengukurindex suhu ruangan dengan menggunakan sensor bola basah dan kering sangat cocok di ruangan kerja.

Description
HD32.2 – WBGT Index is an instrument made by Delta Ohm srl for the analysis
of WBGT index ( Wet Bulb Glob Temperature: wet bulb temperature and globe
thermometer temperature) in presence or in absence of solar radiation.
Reference Regulations:
ISO 7243: Hot environments. Estimation of the heat stress on working man,
based on WBGT index ( wet bulb temperature and Globe thermometer) .
ISO 8996: Ergonomics of the thermal environment – Determination of the energy
metabolism.
ISO 7726: Ergonomics of the thermal environment – Instruments for measuring
physical quantities.
The instrument is provided with three inputs for probes with SICRAM module: the
SICRAM module interface between the instrument and sensor connected and
communicate the sensor parameters and calibration data to the instrument.
All SICRAM probes can be plugged into any of the inputs: they are automatically
recognized upon turning the Instrument on.
The main features of the instrument are:
• Logging: data acquisition and logging to the integral instrument memory.
Storage capacity: 64 different logging sections, sample interval, user
selectable.
• You can set the automatic logging start with auto-start function( Start/ Stop
time ) .
• The measurement unit of the temperature: ° C, ° F, ° K.
• Date and time of the instrument.
• The display of maximum, minimum, medium statistic parameters and their
deletion.
• The data transfer speed via the RS232 serial port.
HD32.2 instrument can detect simultaneously the following quantities:
• Globe thermometer temperature Tg.
• Wet bulb temperature with natural ventilation Tn.
• Environment temperature T.
Starting from the detected values, HD32.2 can calculate:
• WBGT( in) index ( Wet Bulb Glob Temperature: wet bulb temperature and Globe
thermometer) in absence of solar radiation.
• WBGT( out) index ( Wet Bulb Glob Temperature wet bulb temperature and
Globe thermometer) in presence of solar radiation.
WBGT
WBGT ( Wet Bulb Globe Temperature – Wet bulb temperature and globe
thermometer) is one of the indexes used to determinate the occupational heat
exposure.
It represents the value, related to the metabolic expenditure linked to a specific
work activity, that causes a thermal stress when exceeded.
WBGT index combines the temperature measurement of wet bulb with natural
ventilation tnw with the globe thermometer tg and, in some situations, with the air
temperature ta.
The calculation formula is the following:
• inside and outside a buildings in absence of solar radiation:
WBGT close environments = 0, 7 tnw + 0, 3 tg
• outside a building in presence of solar radiation:
WBGToutside environments= 0, 7 tnw + 0, 2 tg + 0, 1 ta
where:
tnw = natural wet bulb;
tg = globe thermometer temperature;
ta = air temperature.
The measured data should be compared with the limit values prescribed by the
regulations;
when exceeded you have to
• reduce directly the thermal stress on the examined work place;
• proceed to a detailed analysis of the thermal stress.
In order to measure the WBGT index, the following probes should be
connected:
• Natural wet bulb HP3201.2.
• TP3276.2 Globe thermometer probe.
• TP3207.2 Dry bulb temperature, of the measurement is performed in
presence of solar radiation.
In order to measure the WBGT index, you should refer to the following
regulations:
• ISO 7726
• ISO 7243
• ISO 8996
Technical features
Instrument
Dimensions 185x90x40 mm
( Length x Width x Height)
Weight 470 g ( batteries included)
Materials ABS, rubber
Display back light, with dot-matrix
160x160 points, visible area 52x42mm
Working conditions
Working temperature -5 … 50° C
Storage temperature -25 … 65° C
Working relative humidity 0 … 90% RH no condensation
Protection Degree IP67
Instrument uncertainty ± 1 digit @ 20° C
Power supply
Mains power supply ( code SWD10) 12Vdc/ 1A
Batteries 4 batteries 1.5V type AA
Autonomy 200 hours with 1800mAh alkaline batteries
Power absorbed with < 45¼ A
instrument off
Safety of the stored data unlimited
TP3207.2 Temperature probe
Sensor type: Pt100 with thin-film
Accuracy: Class 1/ 3 DIN
Measurement range: -40 ÷ 100 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM module
Connector: 8 female poles DIN45326
Dimensions: Ø = 14 mm L= 150 mm
Response time T95: 15 minutes
TP3276.2 Globe thermometer probe Ø = 50 mm
Sensor type: Pt100
Accuracy: Class 1/ 3 DIN
Measurement range: -10 ÷ 100 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM module
Connector: 8 female poles DIN45326
Stem dimensions: Ø = 8 mm L= 170 mm
Response time T95: 15 minutes
HP3201.2 Natural ventilation wet bulb
Sensor type: Pt100
Accuracy: Class A
Measurement range: 4 ° C ÷ 80 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM module
Connector: 8 female poles DIN45326
Stem dimensions: Ø = 14 mm L= 170 mm
Braid length: 10 cm. at least
Tank capacity: 15 cc.
Tank autonomy: 96 hours with RH= 50% , t = 23° C
Response time T95: 15 minutes
Connections
Input for probes with SICRAM module 3 Connectors 8 male poles DIN 45326
Serial Interface:
Pin: M12-8 poles.
Type: RS232C ( EIA/ TIA574) or USB 1.1 o 2.0
not insulated
Baud rate: from 1200 to 38400 baud.
with USB baud= 460800
Data bit: 8
Parity: None
Stop bit: 1
Flow control: Xon-Xoff
Cable length: max 15m
Memory divided in 64 blocks.
Storage capacity 67600 memorizations for each of the 3
inputs.
Logging interval selectable among: 15, 30 seconds, 1, 2, 5,
10, 15, 20, 30 minutes and 1 hour.
Description
HD32.3
WBGT: Wet Bulb Globe Temperature Meter
PMV: Predicted Mean Vote
HD32.3 – WBGT - PMV Index is an instrument made by Delta Ohm Srl for:
• Analysis of hot environments using WBGT index ( Wet Bulb Glob Temperature:
wet bulb temperature and Globe thermometer) in presence or absence of solar
radiation.
• Analysis of the moderate warm environments using PMV index ( Predicted Mean
Vote) and PPD index ( Predicted Percentage of Dissatisfied) .
Reference Rules:
ISO 7243: Hot environments. Estimation of the heat stress on working man, based
on WBGT index ( wet bulb globe Thermometer) .
ISO 8996: Ergonomics of the thermal environment. Determination of metabolic rate.
ISO 7726: Ergonomics of the thermal environment – Instruments for measuring
physical quantities.
ISO 7730: Moderate thermal environments. Determination of PMV and PPD index
and specification of the condition for thermal comfort.
The instrument is provided with three inputs for probes with SICRAM module: the
SICRAM module interface between the instrument and sensor connected and
communicate the sensor parameters and calibration data to the instrument.
All SICRAM probes can be plugged into any of the inputs: they are automatically
recognized upon turning on the instrument.
The main features of the instrument are:
• Logging: data acquisition and logging In the integral instrument memory. Storage
capacity: 64 different logging sections, sample interval, user selectable.
• Start and stop can be set automatically with the auto-start function,
• Selectable measurement unit of the temperature: ° C, ° F, ° K.
• Date and time of the instrument.
• The display of maximum, minimum, medium statistic parameters and their
deletion.
• The transfer speed of data via RS232 serial port.
HD32.3 instrument can detect simultaneously the following quantities:
• Globe thermometer temperature Tg with TP3276.2 probe.
• Natural wet bulb temperature Tn with HP3201.2 probe.
• Environment temperature T with TP3207.2 probe.
• Relative humidity RH and environment temperature T with HP3217.2 probe.
• Air speed Va with AP3203.2 probe.
Starting from the measured values, HD32.3 can calculate and display, with
TP3207.2, HP3276.2, and HP3201.2 probes, the following indexes:
• WBGT ( in) Index ( Wet Bulb Glob Temperature: wet bulb temperature and globe
thermometer) in absence of solar radiation.
• WBGT ( out) Index ( Wet Bulb Glob Temperature: wet bulb temperature and globe
thermometer) in presence of solar radiation.
Starting from the measured values, the HD32.3 instrument can calculate and
display, with TP3217.2, HP3276.2, and AP3203.2 probes, the following indexes:
• Medium radiant temperature Tr.
• PMV Index ( Predicted Mean Vote) .
• PPD Index ( Predicted Percentage of Dissatisfied) .
WBGT
WBGT ( Wet Bulb Globe Temperature – wet bulb and globe temperature) is one of
the indexes used to determinate the occupational heat exposure.
It represents the value, related to the metabolic expenditure linked to a specific
work activity, that causes a thermal stress when exceeded.
WBGT index combines the measurement of wet bulb temperature tnw with natural
ventilation with the globe thermometer temperature tg and, in some situations,
with the air temperature ta.
The calculation formula is the following:
• inside and outside the buildings in absence of solar radiation:
WBGTclose environments = 0, 7 tnw + 0, 3 tg
• outside the buildings in presence of solar radiation:
WBGToutside environments= 0, 7 tnw + 0, 2 tg + 0, 1 ta
where:
tnw = wet bulb temperature with natural ventilation;
tg = globe thermometer temperature;
ta = air temperature.
The measured data should be compared with the limit values prescribed by the
regulations;
when exceeded you have to
• reduce directly the thermal stress on the examined work place;
• proceed to a detailed analysis of the thermal stress.
In order to measure the WBGT index, the following probes should be
connected:
• Natural wet bulb HP3201.2.
• TP3276.2 Globe thermometer probe.
• TP3207.2 Dry bulb temperature, of the measurement is performed in
presence of solar radiation.
In order to measure the WBGT index, you should refer to the following
regulations:
• ISO 7726
• ISO 7243
• ISO 8996
PMV - PPD
Human thermal comfort is defined by ASHRAE ( American Society of Heating,
Refrigerating and Air Conditioning Engineers INC) as the state of mind that
expresses satisfaction with the surrounding living or working environment.
The evaluation of this subjective condition can be objectified and quantified using
integrated index that consider the micro climatic environment parameters ( Ta, Tr,
Va, rh) , and the work-related energy metabolic expenditure MET, and the typology
of clothing ( thermal insulation CLO) commonly used.
Among these indexes, the most precise one reflecting the influence of the above
mentioned physical and physiological variables on thermal comfort is PMV
( Predicted Mean Vote) .
Synthetically, it comes from the equation of the thermal balance whose result is
compared to a scale of psycho - physical health and expresses the average opinion
( average foreseen vote) about the thermal sensations of a group of subjects.
From PMV is derived a second index called PPD ( Predicted Percentage of
Dissatisfied) that quantifies the percentage of subjects who will be dissatisfied with
some micro climatic conditions.
ISO 7730 regulations suggests PMV use in presence of following variables that
influence the thermal balance:
• Metabolic expenditure = 1 ÷ 4 met
• Thermal resistance of clothing = 0 ÷ 2 clo
• Dry bulb temperature = 10 ÷ 30° C
• Medium radiant temperature = 10 ÷ 40° C
• Air speed = 0 ÷ 1 m/ sec
• Water vapour pressure = 0 ÷ 2, 7 kpa
PMV is a particularly suitable index for the evaluation of work places with
moderate microclimate such as houses, schools, offices, research laboratories,
hospitals, and is useful to predict the number of people likely to feel uncomfortably
warm or cool.
According to ISO 7730 PMV values range between + 0, 5 and - 0, 5, provides
comfort conditions corresponding to a percentage of dissatisfied ( PPD) lower than
10% .
( see table below) .
Average radiant temperature Tr
The average radiant temperature is defined as the temperature of 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 radiant temperature, it is necessary to measure:
the globe thermometer temperature, the air temperature, and the air speed
measured close to the globe thermometer.
TECHNICAL FEATURES
Instrument
Dimensions 185x90x40 mm
( Length x Width x Height)
Weight 470 g ( batteries included)
Materials ABS, rubber
Display Back light, dot-matrix
160x160 points, visible area 52x42mm
Working Conditions
Working temperature -5 … 50° C
Storage temperature -25 … 65° C
Working relative humidity 0 … 90% RH no condensation
Protection Degree IP67
Instrument uncertainty ± 1 digit @ 20° C
Power supply
Mains power supply ( cod. SWD10) 12Vdc/ 1A
Batteries 4 batteries 1.5V type AA
Autonomy 200 hours with 1800mAh alkaline batteries
Power absorbed with < 45¼ A
instrument off
Safety of the stored data Unlimited
TP3207.2 temperature probe
Sensor type: Pt100 with thin film
Accuracy: Class 1/ 3 DIN
Measurement range: -40 ÷ 100 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM module
Connector: 8 female poles DIN45326
Dimensions: Ø = 14 mm L= 150 mm
Response time T95: 15 minutes
TP3276.2 globe thermometer probe Ø = 50 mm
Sensor type: Pt100
Accuracy: Class 1/ 3 DIN
Measurement range: -10 ÷ 100 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM module
Connector: 8 female poles DIN45326
Stem dimension: Ø = 8 mm L= 170 mm
Response time T95: 15 minutes
HP3201.2 Natural wet bulb
Sensor type: Pt100
Accuracy: Class A with platinum wire
Measurement range: 4 ° C ÷ 80 ° C
Resolution: 0.1° C
Temperature drift @ 20° C: 0.003% / ° C
Drift after 1 year: 0.1° C/ year
Connection: 4 wires plus SICRAM Module
Connector: 8 female poles DIN45326
Stem dimension: Ø = 14 mm L= 170 mm
Braid length: 10 cm. at least
Tank capacity: 15 cc.
Tank autonomy: 96 hours with RH= 50% , t = 23° C
Response time T95: 15 minutes
HP3217.2 Combined temperature and relative humidity probe
Sensor type: Pt100 with thin film for temperature
Capacitive sensor for relative humidity
Temperature accuracy: 1/ 3 DIN
Relative humidity accuracy: ± 2% RH ( 15 ÷ 90 % RH) @ 20° C
± 2.5% RH remaining range
Measuring range: temperature: -10 ° C ÷ 80 ° C
relative humidity: 5% ÷ 98% RH
Connection: 4 wires plus SICRAM Module
Connector: 8 female poles DIN45326
Dimensions: Ø = 14 mm L= 150 mm
Response time T95: 15 minutes
Resolution: 0.1% RH, 0.1% ° C
AP3203.2 Omnidirectional hot wire probe
Sensor type: NTC 10kohm
Accuracy: ± 0.05 m/ s ( 0÷ 1 m/ s)
± 0.15 m/ s ( 1÷ 5 m/ s)
Measuring range: 0÷ 5 m/ s
0 ° C ÷ 80 ° C
Connection: 7 wires plus SICRAM Module
Connector: 8 female poles DIN45326
Stem dimension: Ø = 8 mm L= 230 mm
Protection dimension: Ø = 80 mm
Resolution: 0.01 m/ s
Temperature drift @ 20° C: 0.06% / ° C
Drift after 1 year: 0.12 ° C/ years
Connections
Input for SICRAM module probes 3 Connectors 8 male poles DIN 45326
Serial interface:
Pin: M12-8 poles.
Type: RS232C ( EIA/ TIA574) or USB 1.1 o 2.0 no
isolated
Baud rate: from 1200 to 38400 baud.
with USB baud= 460800
Data bit: 8
Parity: None
Stop Bit: 1
Flow Control: Xon-Xoff
Cable length: max 15m
Memory divided in 64 blocks.
Storage capacity 67600 memorizations for each of 3 inputs.
Logging interval selectable among: 15, 30 seconds, 1, 2, 5,
10, 15, 20, 30 minutes and 1 hour.