Keterangan
The instruments of the series HD45 and HD46 are transmitters, indicators and
controllers, they measure and control, depending on the model, the following environmental parameters:
⢠Relative humidity ( RH)
⢠Ambient temperature ( T)
⢠Carbon dioxide ( CO2)
⢠Dew point temperature ( DP, calculated measurement)
They are suitable for monitoring the air quality in indoor environments.
Typical applications include checking air quality in all buildings occupied by people
( schools, hospitals, auditoria, work places, canteens, etc.) .. This analysis allows the managing of conditioning plants ( temperature and humidity) and ventilation ( recycle air/ hour) in order to reach a double purpose: getting a good air quality in accordance with ASHRAE and IMC regulations and energy saving.
The measurement of RH ( Relative Humidity) is obtained with a capacitive sensor. In
models HD46 ... the relative humidity and temperature sensor with their calibration
data are contained within an easily replaceable module. The instrument can also calculate the information on the dew point.
The temperature T is measured with a high precision NTC sensor.
The measurement of CO2 ( carbon dioxide) is obtained with a special infrared sensor
( NDIR technology: Non-Dispersive Infrared Technology) , which, thanks to a double filter and a particular measurement technique, ensures accurate measurements and stable measurements over time. The infrared sensor is equipped with a protection membrane which provides protection from dust particles and aggressive air agents to assure the sensorâ s long life. The instrument can be wall mounted and sensors
are all inside.
The instruments are factory calibrated and require no further adjustment by the
installer.
Versions are available with analog voltage output 0÷ 10V or connectable to a PC via
RS485 with MODBUS RTU protocol, which allows connection of multiple transmitters on the same network.
The versions with relay allow to monitor the measured environmental parameters
when the user-settable thresholds are exceeded. The activation of the control is highlighted by the LED indicators ( only on models HD46 ... R) . The operation of the relay is very versatile, having modes of activation above and below the threshold, and with single or double threshold modes. The thresholds are configurable by the user throughout the whole measurement range.
The LCD display option allows instant viewing of all the measurements taken by the
instrument.
The model HD45 BVR is distinguished by the ability to indicate an immediate level
of air quality, through turning on of the LED indicators associated with graphic
symbols.
All the functions of the instrument can be quickly and intuitively configured connecting the instrument to the PC.
The instruments are easy to use, with complete configuration possibilities, which makes them versatile and able to meet many needs in various application fields.
The instruments come with a standard configuration that makes them immediately
operational. Upon request, the devices can be supplied with custom configurations.
HD46 Series models can be equipped with keyboard that allows you to easily configure the instrument even without a connection to a PC. The models having a keypad are fitted with backlit display, activated by pushing a button.
Models of the series HD45 ... provided with relay have a hardware switch that allows
quick selection of the threshold between a set of preset values.
All models perform continuous â loggingâ of the measures, and data can be transferred to the PC.
The instruments work with 24Vac or 15⦠35Vdc power supply.
Technical data
Characteristics of the sensors
Relative humidity RH ( for models HD45 17⦠, HD46 17⦠and HD46 17B⦠)
Sensor Capacitive
Measuring range 5...98 % RH
-40⦠+ 85° C Dew point Td
Working range of the sensor -40...+ 80° C
Accuracy ± 2% ( 10..90% RH) @ 20° C, ± 2.5% in the remaining range.
For Dew point, see table
Resolution 0, 1%
Temperature dependance 2% on the whole temperature range
Hysteresis and repeatability 1% RH
Response time ( T90)
Prioritas Indotrade