HVAC40 – HVAC Transmitters and Hygrostats
Brand: Delta OHM S.R.L.
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HVAC40 – HVAC Transmitters and Hygrostats
Brand: Delta OHM S.R.L.Over 40 years of experience in worldwide applications combined with a new design on accuracy, stability, simplicity and connectivity: this is the HVAC40 series.
These transmitters and hygrostats measure temperature, relative humidity and dew point using an interchangeable relative humidity and temperature digital sensor.
The probe is available in three different versions
- Fixed vertical probe for wall mounting
- Fixed probe with 2 m cable
- Fixed duct horizontal probe
Available outputs, depending on the model
- RS485 Modbus–RTU digital output
- 0 to 10 V voltage analog output
- 0 to 20 mA / 4…20 mA active current analog output
- 2-wire (current loop) 4…20 mA analog output
- ON/OFF relay switch
Relay versions with settable alarm thresholds, hysteresis and delay and supplied as standard with LCD display. Optional LCD for all other versions.
The instruments are factory calibrated and ready for use.
Specifications
Brand
Sensor
- Interchangeable digital relative humidity and temperature sensor
Measuring Range
- 0 to 100 % RH / recommended 5 to 80 % RH
- -20 to +80° C / -20 to +80° C Td
Resolution
- 0.1 % RH / 0.1° C / 0.1° C Td
Accuracy
- Typ. ± 2.5 % RH (5 to 80 % RH) @ t = 15 to 35° C
- Typ. ± 0.3° C @ t = -20 to 70° C / ± 0.5° C @
- t = remaining range
Long Term Drift
- Typ. < 0.25 % RH/year
- Maximum 0.03° C/year
Response Time
- 10 s (63 % of final value with 1 m/s air flow)
Output (Depending On the Model)
- Active analog 0 to 20 or 4-20 mA or 0 to 10 Vdc
- 2-wire (current loop) 4-20 mA
- Digital RS-485 Modbus-RTU
- SPDT Relay switch - 3 A/250 Vac - 3 A/30 Vdc resistive load
- RH: analog outputs are corresponding to a full scale of 0 to 100 %
- Temperature: analog ouputs are user configurable, standard version -20 to +80° C.
Alarm
- Front red LED - measurement detected outside the measuring range (except relay versions)
- For relay versions - front red LED + internal buzzer for exceeding of the set measurement thresold
Power Supply
- Active analog out.: 24 Vac ± 10 % or 18 to 40 Vdc
- Current loop: 15 to 30 Vdc
- Modbus-RTU: 12 to 30 Vdc
- Relay: 24 Vac ± 10 % or 15 to 36 Vdc
Power Consumption
- Active current: 20 mA @ 24 Vdc and Iout=12 mA
- Voltage: 4 mA @ 24 Vdc
- Modbus-RTU: 2 mA @ 24 Vdc
- Relay: < 1 W @ 24 Vdc
Electrical Connections
- Screw terminal block, max. 1.5 mm², PG9 cable gland
Connection to PC
- RS-232 serial port - it can be connected to a USB port by using cable CP27 (except Modbus versions)
- Modbus versions: RS-485 serial port - it can be connected to a USB port by using RS48 adapter
Sensor Operating Conditions
- -20 to +80° C
- The sensor is protected from water and dust
Instrument Operating Conditions
- -20 to +60° C / 0 to 95 % RH
Storage Temperature
- -20° to +80° C
Dimensions
- 80 x 84 x 44 mm (housing)
Protection Degree
- IP65
- HVAC
- Building Automation
- Cleanrooms
- Agriculture
- Humidifiers
